DETERMINING SHORT BETWEEN CIRCUITS LOCATION (CAN-BUS No.1) [(E)]

• When disconnecting the connector, verify that there is no looseness, damage, deformation, corrosion, or poor connection of the connector terminals.

• When inspecting the connector, touch it with a paper clip or similar thin pin without directly inserting a tester probe into the terminal.

• Disconnect the negative battery terminal before performing any work that requires handling of connectors.

Step	Inspection	Action
1	INSPECT BODY CONTROL MODULE (BCM) FOR SHORT BETWEEN CIRCUITS • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Disconnect the connector 3 which has body control module (BCM) terminals 3X and 3W. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Switch the ignition ON (engine off). • Measure the voltage at body control module (BCM) terminals 3X and 3W (wiring harness side). • Is the voltage at body control module (BCM) terminals 3X and 3W (wiring harness side) the same?	Yes	Go to the next step.
No	Replace the body control module (BCM) because there is a short between circuits in the body control module (BCM). (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [(E)].)
2	INSPECT CAN LINE BETWEEN CONNECTOR C-40/C-41 AND BODY CONTROL MODULE (BCM) FOR SHORT BETWEEN CIRCUITS • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Disconnect the connector C-40 (L.H.D.). • Disconnect the connector C-41 (R.H.D.). • Connect the connector 3 which has body control module (BCM) terminals 3X and 3W. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Switch the ignition ON (engine off). • Measure the voltage at body control module (BCM) terminals 3X and 3W. • Is the voltage at body control module (BCM) terminals 3X and 3W the same?	Yes	• Repair or replace the wiring harness between the connector C-40 and body control module (BCM) because the wiring harness is shorted between circuits (L.H.D.). • Repair or replace the wiring harness between the connector C-41 and body control module (BCM) because the wiring harness is shorted between circuits (R.H.D.).
No	Go to the next step.
3	INSPECT CAN LINE BETWEEN EPS CONTROL MODULE AND CONNECTOR C-40/C-41 FOR SHORT BETWEEN CIRCUITS • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Inspect for continuity between EPS control module terminals 2C and 2A. • Is there continuity?	Yes	Go to the next step.
No	Go to Step 5.
4	INSPECT EPS CONTROL MODULE FOR SHORT BETWEEN CIRCUITS • Disconnect the EPS control module connector. • Inspect for continuity between EPS control module terminals 2C and 2A(wiring harness side). • Is there continuity?	Yes	• Repair or replace the wiring harness between the EPS control module and connector C-40 because the wiring harness is shorted between circuits (L.H.D.). • Repair or replace the wiring harness between the EPS control module and connector C-41 because the wiring harness is shorted between circuits (R.H.D.).
No	Replace the EPS control module because there is a short between circuits in the EPS control module. (See STEERING WHEEL AND COLUMN INSPECTION.)
5	INSPECT CAN LINE BETWEEN AUTO LEVELING CONTROL MODULE / ADAPTIVE LED HEADLIGHTS CONTROL MODULE AND CONNECTOR C-40/C-41 FOR SHORT BETWEEN CIRCUITS • Inspect for continuity between auto leveling control module / adaptive LED headlights control module terminals E and H. • Is there continuity?	Yes	Go to the next step.
No	Go to Step 7.
6	INSPECT AUTO LEVELING CONTROL MODULE / ADAPTIVE LED HEADLIGHTS CONTROL MODULE FOR SHORT BETWEEN CIRCUITS • Disconnect the auto leveling control module / adaptive LED headlights control module connector. • Inspect for continuity between auto leveling control module / adaptive LED headlights control module terminals E and H (wiring harness side). • Is there continuity?	Yes	• Repair or replace the wiring harness between the auto leveling control module / adaptive LED headlights control module and connector C-40 because the wiring harness is shorted between circuits (L.H.D.). • Repair or replace the wiring harness between the auto leveling control module / adaptive LED headlights control module and connector C-41 because the wiring harness is shorted between circuits (R.H.D.).
No	Replace the auto leveling control module / adaptive LED headlights control module because there is a short between circuits in the auto leveling control module / adaptive LED headlights control module. (See AUTO LEVELING CONTROL MODULE REMOVAL/INSTALLATION [(E)].) (See ADAPTIVE LED HEADLIGHTS CONTROL MODULE REMOVAL/INSTALLATION.)
7	INSPECT CAN LINE BETWEEN CONNECTOR C-13 AND CONNECTOR C-40/C-41 FOR SHORT BETWEEN CIRCUITS • Disconnect the connector C-13. • Connect the connector C-40 (L.H.D.). • Connect the connector C-41 (R.H.D.). • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Switch the ignition ON (engine off). • Measure the voltage at body control module (BCM) terminals 3X and 3W. • Is the voltage at body control module (BCM) terminals 3X and 3W the same?	Yes	• Repair or replace the wiring harness between the connector C-40 and connector C-13 because the wiring harness is shorted between circuits (L.H.D.). • Repair or replace the wiring harness between the connector C-41 and connector C-13 because the wiring harness is shorted between circuits (R.H.D.).
No	Go to the next step.
8	INSPECT CAN LINE BETWEEN CONNECTOR C-21 AND CONNECTOR C-13 FOR SHORT BETWEEN CIRCUITS • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Disconnect the connector C-21. • Connect the connector C-13. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Switch the ignition ON (engine off). • Measure the voltage at body control module (BCM) terminals 3X and 3W. • Is the voltage at body control module (BCM) terminals 3X and 3W the same?	Yes	Repair or replace the wiring harness between connector C-21 and connector C-13 because the wiring harness is shorted between circuits.
No	Go to the next step.
9	INSPECT CAN LINE BETWEEN CONNECTOR C-21 AND PCM FOR SHORT BETWEEN CIRCUITS • Measure the voltage at PCM terminals 2S and 2T. (SKYACTIV-G or SKYACTIV-X) • Measure the voltage at PCM terminals 2AK and 2AL. (SKYACTIV-D) • Is the voltage at PCM terminals 2S and 2T the same? (SKYACTIV-G or SKYACTIV-X) • Is the voltage at PCM terminals 2AK and 2AL the same? (SKYACTIV-D)	Yes	Go to Step 13.
No	Go to the next step.
10	INSPECT CAN LINE BETWEEN CONNECTOR C-21 AND CONNECTORS C-55, C-56 FOR SHORT BETWEEN CIRCUITS • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Disconnect the connectors C-55, C-56. • Connect the connector C-21. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Switch the ignition ON (engine off). • Measure the voltage at body control module (BCM) terminals 3X and 3W. • Is the voltage at body control module (BCM) terminals 3X and 3W the same?	Yes	Repair or replace the wiring harness between connector C-21 and connectors C-55, C-56 because the wiring harness is shorted between circuits.
No	Go to the next step.
11	INSPECT CAN LINE BETWEEN SAS CONTROL MODULE AND CONNECTORS C-55, C-56 FOR SHORT BETWEEN CIRCUITS • Measure the voltage at PCM terminals 2S and 2T. (SKYACTIV-G or SKYACTIV-X) • Measure the voltage at PCM terminals 2AK and 2AL. (SKYACTIV-D) • Is the voltage at PCM terminals 2S and 2T the same? (SKYACTIV-G or SKYACTIV-X) • Is the voltage at PCM terminals 2AK and 2AL the same? (SKYACTIV-D)	Yes	Repair or replace the wiring harness between the connectors C-55, C-56 and connector C-21 because the wiring harness is shorted between circuits.
No	Go to the next step.
12	INSPECT SAS CONTROL MODULE FOR SHORT BETWEEN CIRCUITS • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Disconnect the SAS control module connector. • Inspect for continuity between SAS control module terminals 3A and 3D (wiring harness side). • Is there continuity?	Yes	Repair or replace the wiring harness between the SAS control module and connectors C-55, C-56 because the wiring harness is shorted between circuits.
No	Replace the SAS control module because there is a short between circuits in the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)
13	INSPECT CAN LINE BETWEEN CONNECTOR C-07 AND CONNECTOR C-21 FOR SHORT BETWEEN CIRCUITS • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Disconnect the connector C-07. • Connect the connector C-21. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Switch the ignition ON (engine off). • Measure the voltage at body control module (BCM) terminals 3X and 3W. • Is the voltage at body control module (BCM) terminals 3X and 3W the same?	Yes	Repair or replace the wiring harness between connector C-07 and connector C-21 because the wiring harness is shorted between circuits.
No	• Go to the next step. (SKYACTIV-D (ATX)) (with connectors C-37, C-36) • Go to Step 20. (SKYACTIV-D (ATX)) (without connectors C-37, C-36) • Go to Step 24. (SKYACTIV-G or SKYACTIV-X or SKYACTIV-D (MTX)) (with connectors C-37, C-36) • Go to Step 28. (SKYACTIV-G or SKYACTIV-X or SKYACTIV-D (MTX)) (without connectors C-37, C-36)
14	INSPECT CAN LINE BETWEEN CONNECTORS C-37, C-36 AND CONNECTOR C-07 FOR SHORT BETWEEN CIRCUITS • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Disconnect the connectors C-37, C-36. • Connect the connector C-07. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Switch the ignition ON (engine off). • Measure the voltage at body control module (BCM) terminals 3X and 3W. • Is the voltage at body control module (BCM) terminals 3X and 3W the same?	Yes	Go to Step 17.
No	Go to the next step.
15	INSPECT CAN LINE BETWEEN CONNECTOR C-02 AND CONNECTOR C-07 / CONNECTORS C-37, C-36 FOR SHORT BETWEEN CIRCUITS • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Disconnect the connectors C-02. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Switch the ignition ON (engine off). • Measure the voltage at body control module (BCM) terminals 3X and 3W. • Is the voltage at body control module (BCM) terminals 3X and 3W the same?	Yes	Repair or replace the wiring harness between the connector C-02 and connector C-07 / connectors C-37, C-36 because the wiring harness is shorted between circuits.
No	Go to the next step.
16	INSPECT TCM FOR SHORT BETWEEN CIRCUITS • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Disconnect the TCM connector. • Inspect for continuity between TCM terminals E and F (wiring harness side). • Is there continuity?	Yes	Repair or replace the wiring harness between the TCM and connector C-02 because the wiring harness is shorted between circuits.
No	Replace the TCM because there is a short between circuits in the TCM. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [ET6A-EL, ET6AX-EL (E)].) (See CONTROL VALVE BODY REMOVAL/INSTALLATION [EV6A-EL, EV6AX-EL (E)].)
17	INSPECT CAN LINE BETWEEN DSC HU/CM / ELECTRONICALLY CONTROLLED BRAKE UNIT AND CONNECTORS C-37, C-36 FOR SHORT BETWEEN CIRCUITS • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Inspect for continuity between DSC HU/CM terminals L and J. (without Mazda M Hybrid) • Inspect for continuity between electronically controlled brake unit terminals 1AM and 1AO. (with Mazda M Hybrid) • Is there continuity?	Yes	Go to the next step.
No	Go to Step 19.
18	INSPECT DSC HU/CM / ELECTRONICALLY CONTROLLED BRAKE UNIT FOR SHORT BETWEEN CIRCUITS • Disconnect the DSC HU/CM / electronically controlled brake unit connector. • Inspect for continuity between DSC HU/CM terminals L and J (wiring harness side). (without Mazda M Hybrid) • Inspect for continuity between electronically controlled brake unit terminals 1AM and 1AO (wiring harness side). (with Mazda M Hybrid) • Is there continuity?	Yes	Repair or replace the wiring harness between the DSC HU/CM / electronically controlled brake unit and connectors C-37, C-36 because the wiring harness is shorted between circuits.
No	Replace the DSC HU/CM / electronically controlled brake unit because there is a short between circuits in the DSC HU/CM / electronically controlled brake unit. (See DSC HU/CM REMOVAL/INSTALLATION [L.H.D. (E)].) (See DSC HU/CM REMOVAL/INSTALLATION [R.H.D.].) (See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [L.H.D.].) (See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [R.H.D.].)
19	INSPECT PCM FOR SHORT BETWEEN CIRCUITS • Disconnect the PCM connector. • Inspect for continuity between PCM terminals 2AK and 2AL (wiring harness side). (SKYACTIV-D) • Is there continuity?	Yes	Repair or replace the wiring harness between the PCM and connectors C-37 C-36 because the wiring harness is shorted between circuits.
No	Replace the PCM because there is a short between circuits in the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
20	INSPECT CAN LINE BETWEEN TCM AND CONNECTOR C-02 FOR SHORT BETWEEN CIRCUITS • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Disconnect the connector C-02. • Inspect for continuity between TCM terminals E and F. • Is there continuity?	Yes	Go to the next step.
No	Go to Step 22.
21	INSPECT TCM FOR SHORT BETWEEN CIRCUITS • Disconnect the TCM connector. • Inspect for continuity between TCM terminals E and F (wiring harness side). • Is there continuity?	Yes	Repair or replace the wiring harness between the TCM and connector C-02 because the wiring harness is shorted between circuits.
No	Replace the TCM because there is a short between circuits in the TCM. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [ET6A-EL, ET6AX-EL (E)].) (See CONTROL VALVE BODY REMOVAL/INSTALLATION [EV6A-EL, EV6AX-EL (E)].)
22	INSPECT DSC HU/CM / ELECTRONICALLY CONTROLLED BRAKE UNIT FOR SHORT BETWEEN CIRCUITS • Disconnect the DSC HU/CM / electronically controlled brake unit connector. • Inspect for continuity between DSC HU/CM terminals L and J (wiring harness side). (without Mazda M Hybrid) • Inspect for continuity between electronically controlled brake unit terminals 1AM and 1AO (wiring harness side). (with Mazda M Hybrid) • Is there continuity?	Yes	Go to the next step.
No	Replace the DSC HU/CM / electronically controlled brake unit because there is a short between circuits in the DSC HU/CM / electronically controlled brake unit. (See DSC HU/CM REMOVAL/INSTALLATION [L.H.D. (E)].) (See DSC HU/CM REMOVAL/INSTALLATION [R.H.D.].) (See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [L.H.D.].) (See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [R.H.D.].)
23	INSPECT PCM FOR SHORT BETWEEN CIRCUITS • Disconnect the PCM connector. • Inspect for continuity between PCM terminals 2AK and 2AL (wiring harness side). • Is there continuity?	Yes	Repair or replace the wiring harness between the PCM and connector C-07 because the wiring harness is shorted between circuits.
No	Replace the PCM because there is a short between circuits in the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
24	INSPECT CAN LINE BETWEEN CONNECTOR C-07 AND CONNECTORS C-37, C-36 FOR SHORT BETWEEN CIRCUITS • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Disconnect the connectors C-37, C-36. • Connect the connector C-07. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Switch the ignition ON (engine off). • Measure the voltage at body control module (BCM) terminals 3X and 3W. • Is the voltage at body control module (BCM) terminals 3X and 3W the same?	Yes	Repair or replace the wiring harness between the connector C-07 and connectors C-37, C-36 because the wiring harness is shorted between circuits.
No	Go to the next step.
25	INSPECT CAN LINE BETWEEN DSC HU/CM / ELECTRONICALLY CONTROLLED BRAKE UNIT AND CONNECTORS C-37, C-36 FOR SHORT BETWEEN CIRCUITS • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Inspect for continuity between DSC HU/CM terminals L and J. (without Mazda M Hybrid) • Inspect for continuity between electronically controlled brake unit terminals 1AM and 1AO. (with Mazda M Hybrid) • Is there continuity?	Yes	Go to the next step.
No	Go to Step 27.
26	INSPECT DSC HU/CM / ELECTRONICALLY CONTROLLED BRAKE UNIT FOR SHORT BETWEEN CIRCUITS • Disconnect the DSC HU/CM / electronically controlled brake unit connector. • Inspect for continuity between DSC HU/CM terminals L and J (wiring harness side). (without Mazda M Hybrid) • Inspect for continuity between electronically controlled brake unit terminals 1AM and 1AO (wiring harness side). (with Mazda M Hybrid) • Is there continuity?	Yes	Repair or replace the wiring harness between the DSC HU/CM / electronically controlled brake unit and connectors C-37, C-36 because the wiring harness is shorted between circuits.
No	Replace the DSC HU/CM / electronically controlled brake unit because there is a short between circuits in the DSC HU/CM / electronically controlled brake unit. (See DSC HU/CM REMOVAL/INSTALLATION [L.H.D. (E)].) (See DSC HU/CM REMOVAL/INSTALLATION [R.H.D.].) (See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [L.H.D.].) (See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [R.H.D.].)
27	INSPECT CAN LINE BETWEEN CONNECTORS C-37, C-36 AND CONNECTOR C-02 FOR SHORT BETWEEN CIRCUITS • Disconnect the connector C-02. • Connect the connectors C-37, C-36. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Switch the ignition ON (engine off). • Measure the voltage at body control module (BCM) terminals 3X and 3W. • Is the voltage at body control module (BCM) terminals 3X and 3W the same?	Yes	Repair or replace the wiring harness between the connectors C-37, C-36 and connector C-07 because the wiring harness is shorted between circuits.
No	• Go to Step 30. (SKYACTIV-G or SKYACTIV-X (ATX)) • Go to Step 34. (SKYACTIV-G or SKYACTIV-X (MTX), SKYACTIV-D (MTX))
28	INSPECT CAN LINE BETWEEN DSC HU/CM / ELECTRONICALLY CONTROLLED BRAKE UNIT AND CONNECTOR C-07 / CONNECTOR C-02 FOR SHORT BETWEEN CIRCUITS • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Disconnect the connector C-02. • Inspect for continuity between DSC HU/CM terminals L and J. (without Mazda M Hybrid) • Inspect for continuity between electronically controlled brake unit terminals 1AM and 1AO. (with Mazda M Hybrid) • Is there continuity?	Yes	Go to the next step.
No	• Go to Step 30. (SKYACTIV-G or SKYACTIV-X (ATX)) • Go to Step 34. (SKYACTIV-G or SKYACTIV-X (MTX), SKYACTIV-D (MTX))
29	INSPECT DSC HU/CM / ELECTRONICALLY CONTROLLED BRAKE UNIT FOR SHORT BETWEEN CIRCUITS • Disconnect the DSC HU/CM / electronically controlled brake unit connector. • Inspect for continuity between DSC HU/CM terminals L and J (wiring harness side). (without Mazda M Hybrid) • Inspect for continuity between electronically controlled brake unit terminals 1AM and 1AO (wiring harness side). (with Mazda M Hybrid) • Is there continuity?	Yes	Repair or replace the wiring harness between the DSC HU/CM / electronically controlled brake unit and connector C-07 / connector C-02 because the wiring harness is shorted between circuits.
No	Replace the DSC HU/CM / electronically controlled brake unit because there is a short between circuits in the DSC HU/CM / electronically controlled brake unit. (See DSC HU/CM REMOVAL/INSTALLATION [L.H.D. (E)].) (See DSC HU/CM REMOVAL/INSTALLATION [R.H.D.].) (See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [L.H.D.].) (See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [R.H.D.].)
30	INSPECT CAN LINE BETWEEN CONNECTOR C-38 AND CONNECTOR C-02 FOR SHORT BETWEEN CIRCUITS • Disconnect the connector C-38. • Connect the connector C-02. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Switch the ignition ON (engine off). • Measure the voltage at body control module (BCM) terminals 3X and 3W. • Is the voltage at body control module (BCM) terminals 3X and 3W the same?	Yes	Repair or replace the wiring harness between connector C-38 and connector C-02 because the wiring harness is shorted between circuits.
No	Go to the next step.
31	INSPECT CAN LINE BETWEEN TCM AND CONNECTOR C-38 FOR SHORT BETWEEN CIRCUITS • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Inspect for continuity between TCM terminals E and F. • Is there continuity?	Yes	Go to the next step.
No	Go to Step 33.
32	INSPECT TCM FOR SHORT BETWEEN CIRCUITS • Disconnect the TCM connector. • Inspect for continuity between TCM terminals E and F (wiring harness side). • Is there continuity?	Yes	Repair or replace the wiring harness between the TCM and connector C-38 because the wiring harness is shorted between circuits.
No	Replace the TCM because there is a short between circuits in the TCM. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [ET6A-EL, ET6AX-EL (E)].) (See CONTROL VALVE BODY REMOVAL/INSTALLATION [EV6A-EL, EV6AX-EL (E)].)
33	INSPECT CAN LINE BETWEEN CONNECTOR C-38 AND CONNECTOR C-01 FOR SHORT BETWEEN CIRCUITS • Disconnect the connector C-01. • Connect the connector C-38. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Switch the ignition ON (engine off). • Measure the voltage at body control module (BCM) terminals 3X and 3W. • Is the voltage at body control module (BCM) terminals 3X and 3W the same?	Yes	Repair or replace the wiring harness between connector C-01 and connector C-38 because the wiring harness is shorted between circuits.
No	Go to Step 35.
34	INSPECT CAN LINE BETWEEN CONNECTOR C-02 AND CONNECTOR C-01 FOR SHORT BETWEEN CIRCUITS • Disconnect the connector C-01. • Connect the connector C-02. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Switch the ignition ON (engine off). • Measure the voltage at body control module (BCM) terminals 3X and 3W. • Is the voltage at body control module (BCM) terminals 3X and 3W the same?	Yes	Repair or replace the wiring harness between connector C-02 and connector C-01 because the wiring harness is shorted between circuits.
No	Go to the next step.
35	INSPECT PCM FOR SHORT BETWEEN CIRCUITS • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) • Disconnect the PCM connector. • Inspect for continuity between PCM terminals 2S and 2T (wiring harness side). (SKYACTIV-G or SKYACTIV-X) • Inspect for continuity between PCM terminals 2AK and 2AL (wiring harness side). (SKYACTIV-D) • Is there continuity?	Yes	Repair or replace the wiring harness between the PCM and connector C-01 because the wiring harness is shorted between circuits.
No	Replace the PCM because there is a short between circuits in the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].) (See PCM REMOVAL/INSTALLATION [SKYACTIV-X 2.0].) (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

Step

Inspection

Action

INSPECT BODY CONTROL MODULE (BCM) FOR SHORT BETWEEN CIRCUITS

• Switch the ignition off.

• Disconnect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Disconnect the connector 3 which has body control module (BCM) terminals 3X and 3W.

• Connect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Switch the ignition ON (engine off).

• Measure the voltage at body control module (BCM) terminals 3X and 3W (wiring harness side).

• Is the voltage at body control module (BCM) terminals 3X and 3W (wiring harness side) the same?

Yes

Go to the next step.

Replace the body control module (BCM) because there is a short between circuits in the body control module (BCM).

(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [(E)].)

INSPECT CAN LINE BETWEEN CONNECTOR C-40/C-41 AND BODY CONTROL MODULE (BCM) FOR SHORT BETWEEN CIRCUITS

• Switch the ignition off.

• Disconnect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Disconnect the connector C-40 (L.H.D.).

• Disconnect the connector C-41 (R.H.D.).

• Connect the connector 3 which has body control module (BCM) terminals 3X and 3W.

• Connect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Switch the ignition ON (engine off).

• Measure the voltage at body control module (BCM) terminals 3X and 3W.

• Is the voltage at body control module (BCM) terminals 3X and 3W the same?

Yes

• Repair or replace the wiring harness between the connector C-40 and body control module (BCM) because the wiring harness is shorted between circuits (L.H.D.).

• Repair or replace the wiring harness between the connector C-41 and body control module (BCM) because the wiring harness is shorted between circuits (R.H.D.).

Go to the next step.

INSPECT CAN LINE BETWEEN EPS CONTROL MODULE AND CONNECTOR C-40/C-41 FOR SHORT BETWEEN CIRCUITS

• Switch the ignition off.

• Disconnect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Inspect for continuity between EPS control module terminals 2C and 2A.

• Is there continuity?

Yes

Go to the next step.

Go to Step 5.

INSPECT EPS CONTROL MODULE FOR SHORT BETWEEN CIRCUITS

• Disconnect the EPS control module connector.

• Inspect for continuity between EPS control module terminals 2C and 2A(wiring harness side).

• Is there continuity?

Yes

• Repair or replace the wiring harness between the EPS control module and connector C-40 because the wiring harness is shorted between circuits (L.H.D.).

• Repair or replace the wiring harness between the EPS control module and connector C-41 because the wiring harness is shorted between circuits (R.H.D.).

Replace the EPS control module because there is a short between circuits in the EPS control module.

(See STEERING WHEEL AND COLUMN INSPECTION.)

INSPECT CAN LINE BETWEEN AUTO LEVELING CONTROL MODULE / ADAPTIVE LED HEADLIGHTS CONTROL MODULE AND CONNECTOR C-40/C-41 FOR SHORT BETWEEN CIRCUITS

• Inspect for continuity between auto leveling control module / adaptive LED headlights control module terminals E and H.

• Is there continuity?

Yes

Go to the next step.

Go to Step 7.

INSPECT AUTO LEVELING CONTROL MODULE / ADAPTIVE LED HEADLIGHTS CONTROL MODULE FOR SHORT BETWEEN CIRCUITS

• Disconnect the auto leveling control module / adaptive LED headlights control module connector.

• Inspect for continuity between auto leveling control module / adaptive LED headlights control module terminals E and H (wiring harness side).

• Is there continuity?

Yes

• Repair or replace the wiring harness between the auto leveling control module / adaptive LED headlights control module and connector C-40 because the wiring harness is shorted between circuits (L.H.D.).

• Repair or replace the wiring harness between the auto leveling control module / adaptive LED headlights control module and connector C-41 because the wiring harness is shorted between circuits (R.H.D.).

Replace the auto leveling control module / adaptive LED headlights control module because there is a short between circuits in the auto leveling control module / adaptive LED headlights control module.

(See AUTO LEVELING CONTROL MODULE REMOVAL/INSTALLATION [(E)].)

(See ADAPTIVE LED HEADLIGHTS CONTROL MODULE REMOVAL/INSTALLATION.)

INSPECT CAN LINE BETWEEN CONNECTOR C-13 AND CONNECTOR C-40/C-41 FOR SHORT BETWEEN CIRCUITS

• Disconnect the connector C-13.

• Connect the connector C-40 (L.H.D.).

• Connect the connector C-41 (R.H.D.).

• Connect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Switch the ignition ON (engine off).

• Measure the voltage at body control module (BCM) terminals 3X and 3W.

• Is the voltage at body control module (BCM) terminals 3X and 3W the same?

Yes

• Repair or replace the wiring harness between the connector C-40 and connector C-13 because the wiring harness is shorted between circuits (L.H.D.).

• Repair or replace the wiring harness between the connector C-41 and connector C-13 because the wiring harness is shorted between circuits (R.H.D.).

Go to the next step.

INSPECT CAN LINE BETWEEN CONNECTOR C-21 AND CONNECTOR C-13 FOR SHORT BETWEEN CIRCUITS

• Switch the ignition off.

• Disconnect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Disconnect the connector C-21.

• Connect the connector C-13.

• Connect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Switch the ignition ON (engine off).

• Measure the voltage at body control module (BCM) terminals 3X and 3W.

• Is the voltage at body control module (BCM) terminals 3X and 3W the same?

Yes

Repair or replace the wiring harness between connector C-21 and connector C-13 because the wiring harness is shorted between circuits.

Go to the next step.

INSPECT CAN LINE BETWEEN CONNECTOR C-21 AND PCM FOR SHORT BETWEEN CIRCUITS

• Measure the voltage at PCM terminals 2S and 2T. (SKYACTIV-G or SKYACTIV-X)

• Measure the voltage at PCM terminals 2AK and 2AL. (SKYACTIV-D)

• Is the voltage at PCM terminals 2S and 2T the same? (SKYACTIV-G or SKYACTIV-X)

• Is the voltage at PCM terminals 2AK and 2AL the same? (SKYACTIV-D)

Yes

Go to Step 13.

Go to the next step.

INSPECT CAN LINE BETWEEN CONNECTOR C-21 AND CONNECTORS C-55, C-56 FOR SHORT BETWEEN CIRCUITS

• Switch the ignition off.

• Disconnect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Disconnect the connectors C-55, C-56.

• Connect the connector C-21.

• Connect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Switch the ignition ON (engine off).

• Measure the voltage at body control module (BCM) terminals 3X and 3W.

• Is the voltage at body control module (BCM) terminals 3X and 3W the same?

Yes

Repair or replace the wiring harness between connector C-21 and connectors C-55, C-56 because the wiring harness is shorted between circuits.

Go to the next step.

INSPECT CAN LINE BETWEEN SAS CONTROL MODULE AND CONNECTORS C-55, C-56 FOR SHORT BETWEEN CIRCUITS

• Measure the voltage at PCM terminals 2S and 2T. (SKYACTIV-G or SKYACTIV-X)

• Measure the voltage at PCM terminals 2AK and 2AL. (SKYACTIV-D)

• Is the voltage at PCM terminals 2S and 2T the same? (SKYACTIV-G or SKYACTIV-X)

• Is the voltage at PCM terminals 2AK and 2AL the same? (SKYACTIV-D)

Yes

Repair or replace the wiring harness between the connectors C-55, C-56 and connector C-21 because the wiring harness is shorted between circuits.

Go to the next step.

INSPECT SAS CONTROL MODULE FOR SHORT BETWEEN CIRCUITS

• Switch the ignition off.

• Disconnect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Disconnect the SAS control module connector.

• Inspect for continuity between SAS control module terminals 3A and 3D (wiring harness side).

• Is there continuity?

Yes

Repair or replace the wiring harness between the SAS control module and connectors C-55, C-56 because the wiring harness is shorted between circuits.

Replace the SAS control module because there is a short between circuits in the SAS control module.

(See SAS CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)

INSPECT CAN LINE BETWEEN CONNECTOR C-07 AND CONNECTOR C-21 FOR SHORT BETWEEN CIRCUITS

• Switch the ignition off.

• Disconnect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Disconnect the connector C-07.

• Connect the connector C-21.

• Connect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Switch the ignition ON (engine off).

• Measure the voltage at body control module (BCM) terminals 3X and 3W.

• Is the voltage at body control module (BCM) terminals 3X and 3W the same?

Yes

Repair or replace the wiring harness between connector C-07 and connector C-21 because the wiring harness is shorted between circuits.

• Go to the next step. (SKYACTIV-D (ATX)) (with connectors C-37, C-36)

• Go to Step 20. (SKYACTIV-D (ATX)) (without connectors C-37, C-36)

• Go to Step 24. (SKYACTIV-G or SKYACTIV-X or SKYACTIV-D (MTX)) (with connectors C-37, C-36)

• Go to Step 28. (SKYACTIV-G or SKYACTIV-X or SKYACTIV-D (MTX)) (without connectors C-37, C-36)

INSPECT CAN LINE BETWEEN CONNECTORS C-37, C-36 AND CONNECTOR C-07 FOR SHORT BETWEEN CIRCUITS

• Switch the ignition off.

• Disconnect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Disconnect the connectors C-37, C-36.

• Connect the connector C-07.

• Connect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Switch the ignition ON (engine off).

• Measure the voltage at body control module (BCM) terminals 3X and 3W.

• Is the voltage at body control module (BCM) terminals 3X and 3W the same?

Yes

Go to Step 17.

Go to the next step.

INSPECT CAN LINE BETWEEN CONNECTOR C-02 AND CONNECTOR C-07 / CONNECTORS C-37, C-36 FOR SHORT BETWEEN CIRCUITS

• Switch the ignition off.

• Disconnect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Disconnect the connectors C-02.

• Connect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Switch the ignition ON (engine off).

• Measure the voltage at body control module (BCM) terminals 3X and 3W.

• Is the voltage at body control module (BCM) terminals 3X and 3W the same?

Yes

Repair or replace the wiring harness between the connector C-02 and connector C-07 / connectors C-37, C-36 because the wiring harness is shorted between circuits.

Go to the next step.

INSPECT TCM FOR SHORT BETWEEN CIRCUITS

• Switch the ignition off.

• Disconnect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Disconnect the TCM connector.

• Inspect for continuity between TCM terminals E and F (wiring harness side).

• Is there continuity?

Yes

Repair or replace the wiring harness between the TCM and connector C-02 because the wiring harness is shorted between circuits.

Replace the TCM because there is a short between circuits in the TCM.

(See CONTROL VALVE BODY REMOVAL/INSTALLATION [ET6A-EL, ET6AX-EL (E)].)

(See CONTROL VALVE BODY REMOVAL/INSTALLATION [EV6A-EL, EV6AX-EL (E)].)

INSPECT CAN LINE BETWEEN DSC HU/CM / ELECTRONICALLY CONTROLLED BRAKE UNIT AND CONNECTORS C-37, C-36 FOR SHORT BETWEEN CIRCUITS

• Switch the ignition off.

• Disconnect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Inspect for continuity between DSC HU/CM terminals L and J. (without Mazda M Hybrid)

• Inspect for continuity between electronically controlled brake unit terminals 1AM and 1AO. (with Mazda M Hybrid)

• Is there continuity?

Yes

Go to the next step.

Go to Step 19.

INSPECT DSC HU/CM / ELECTRONICALLY CONTROLLED BRAKE UNIT FOR SHORT BETWEEN CIRCUITS

• Disconnect the DSC HU/CM / electronically controlled brake unit connector.

• Inspect for continuity between DSC HU/CM terminals L and J (wiring harness side). (without Mazda M Hybrid)

• Inspect for continuity between electronically controlled brake unit terminals 1AM and 1AO (wiring harness side). (with Mazda M Hybrid)

• Is there continuity?

Yes

Repair or replace the wiring harness between the DSC HU/CM / electronically controlled brake unit and connectors C-37, C-36 because the wiring harness is shorted between circuits.

Replace the DSC HU/CM / electronically controlled brake unit because there is a short between circuits in the DSC HU/CM / electronically controlled brake unit.

(See DSC HU/CM REMOVAL/INSTALLATION [L.H.D. (E)].)

(See DSC HU/CM REMOVAL/INSTALLATION [R.H.D.].)

(See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [L.H.D.].)

(See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [R.H.D.].)

INSPECT PCM FOR SHORT BETWEEN CIRCUITS

• Disconnect the PCM connector.

• Inspect for continuity between PCM terminals 2AK and 2AL (wiring harness side). (SKYACTIV-D)

• Is there continuity?

Yes

Repair or replace the wiring harness between the PCM and connectors C-37 C-36 because the wiring harness is shorted between circuits.

Replace the PCM because there is a short between circuits in the PCM.

(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

INSPECT CAN LINE BETWEEN TCM AND CONNECTOR C-02 FOR SHORT BETWEEN CIRCUITS

• Switch the ignition off.

• Disconnect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Disconnect the connector C-02.

• Inspect for continuity between TCM terminals E and F.

• Is there continuity?

Yes

Go to the next step.

Go to Step 22.

INSPECT TCM FOR SHORT BETWEEN CIRCUITS

• Disconnect the TCM connector.

• Inspect for continuity between TCM terminals E and F (wiring harness side).

• Is there continuity?

Yes

Repair or replace the wiring harness between the TCM and connector C-02 because the wiring harness is shorted between circuits.

Replace the TCM because there is a short between circuits in the TCM.

(See CONTROL VALVE BODY REMOVAL/INSTALLATION [ET6A-EL, ET6AX-EL (E)].)

(See CONTROL VALVE BODY REMOVAL/INSTALLATION [EV6A-EL, EV6AX-EL (E)].)

INSPECT DSC HU/CM / ELECTRONICALLY CONTROLLED BRAKE UNIT FOR SHORT BETWEEN CIRCUITS

• Disconnect the DSC HU/CM / electronically controlled brake unit connector.

• Inspect for continuity between DSC HU/CM terminals L and J (wiring harness side). (without Mazda M Hybrid)

• Inspect for continuity between electronically controlled brake unit terminals 1AM and 1AO (wiring harness side). (with Mazda M Hybrid)

• Is there continuity?

Yes

Go to the next step.

Replace the DSC HU/CM / electronically controlled brake unit because there is a short between circuits in the DSC HU/CM / electronically controlled brake unit.

(See DSC HU/CM REMOVAL/INSTALLATION [L.H.D. (E)].)

(See DSC HU/CM REMOVAL/INSTALLATION [R.H.D.].)

(See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [L.H.D.].)

(See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [R.H.D.].)

INSPECT PCM FOR SHORT BETWEEN CIRCUITS

• Disconnect the PCM connector.

• Inspect for continuity between PCM terminals 2AK and 2AL (wiring harness side).

• Is there continuity?

Yes

Repair or replace the wiring harness between the PCM and connector C-07 because the wiring harness is shorted between circuits.

Replace the PCM because there is a short between circuits in the PCM.

(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

INSPECT CAN LINE BETWEEN CONNECTOR C-07 AND CONNECTORS C-37, C-36 FOR SHORT BETWEEN CIRCUITS

• Switch the ignition off.

• Disconnect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Disconnect the connectors C-37, C-36.

• Connect the connector C-07.

• Connect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Switch the ignition ON (engine off).

• Measure the voltage at body control module (BCM) terminals 3X and 3W.

• Is the voltage at body control module (BCM) terminals 3X and 3W the same?

Yes

Repair or replace the wiring harness between the connector C-07 and connectors C-37, C-36 because the wiring harness is shorted between circuits.

Go to the next step.

INSPECT CAN LINE BETWEEN DSC HU/CM / ELECTRONICALLY CONTROLLED BRAKE UNIT AND CONNECTORS C-37, C-36 FOR SHORT BETWEEN CIRCUITS

• Switch the ignition off.

• Disconnect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Inspect for continuity between DSC HU/CM terminals L and J. (without Mazda M Hybrid)

• Inspect for continuity between electronically controlled brake unit terminals 1AM and 1AO. (with Mazda M Hybrid)

• Is there continuity?

Yes

Go to the next step.

Go to Step 27.

INSPECT DSC HU/CM / ELECTRONICALLY CONTROLLED BRAKE UNIT FOR SHORT BETWEEN CIRCUITS

• Disconnect the DSC HU/CM / electronically controlled brake unit connector.

• Inspect for continuity between DSC HU/CM terminals L and J (wiring harness side). (without Mazda M Hybrid)

• Inspect for continuity between electronically controlled brake unit terminals 1AM and 1AO (wiring harness side). (with Mazda M Hybrid)

• Is there continuity?

Yes

Repair or replace the wiring harness between the DSC HU/CM / electronically controlled brake unit and connectors C-37, C-36 because the wiring harness is shorted between circuits.

Replace the DSC HU/CM / electronically controlled brake unit because there is a short between circuits in the DSC HU/CM / electronically controlled brake unit.

(See DSC HU/CM REMOVAL/INSTALLATION [L.H.D. (E)].)

(See DSC HU/CM REMOVAL/INSTALLATION [R.H.D.].)

(See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [L.H.D.].)

(See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [R.H.D.].)

INSPECT CAN LINE BETWEEN CONNECTORS C-37, C-36 AND CONNECTOR C-02 FOR SHORT BETWEEN CIRCUITS

• Disconnect the connector C-02.

• Connect the connectors C-37, C-36.

• Connect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Switch the ignition ON (engine off).

• Measure the voltage at body control module (BCM) terminals 3X and 3W.

• Is the voltage at body control module (BCM) terminals 3X and 3W the same?

Yes

Repair or replace the wiring harness between the connectors C-37, C-36 and connector C-07 because the wiring harness is shorted between circuits.

• Go to Step 30. (SKYACTIV-G or SKYACTIV-X (ATX))

• Go to Step 34. (SKYACTIV-G or SKYACTIV-X (MTX), SKYACTIV-D (MTX))

INSPECT CAN LINE BETWEEN DSC HU/CM / ELECTRONICALLY CONTROLLED BRAKE UNIT AND CONNECTOR C-07 / CONNECTOR C-02 FOR SHORT BETWEEN CIRCUITS

• Switch the ignition off.

• Disconnect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Disconnect the connector C-02.

• Inspect for continuity between DSC HU/CM terminals L and J. (without Mazda M Hybrid)

• Inspect for continuity between electronically controlled brake unit terminals 1AM and 1AO. (with Mazda M Hybrid)

• Is there continuity?

Yes

Go to the next step.

• Go to Step 30. (SKYACTIV-G or SKYACTIV-X (ATX))

• Go to Step 34. (SKYACTIV-G or SKYACTIV-X (MTX), SKYACTIV-D (MTX))

INSPECT DSC HU/CM / ELECTRONICALLY CONTROLLED BRAKE UNIT FOR SHORT BETWEEN CIRCUITS

• Disconnect the DSC HU/CM / electronically controlled brake unit connector.

• Inspect for continuity between DSC HU/CM terminals L and J (wiring harness side). (without Mazda M Hybrid)

• Inspect for continuity between electronically controlled brake unit terminals 1AM and 1AO (wiring harness side). (with Mazda M Hybrid)

• Is there continuity?

Yes

Repair or replace the wiring harness between the DSC HU/CM / electronically controlled brake unit and connector C-07 / connector C-02 because the wiring harness is shorted between circuits.

Replace the DSC HU/CM / electronically controlled brake unit because there is a short between circuits in the DSC HU/CM / electronically controlled brake unit.

(See DSC HU/CM REMOVAL/INSTALLATION [L.H.D. (E)].)

(See DSC HU/CM REMOVAL/INSTALLATION [R.H.D.].)

(See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [L.H.D.].)

(See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [R.H.D.].)

INSPECT CAN LINE BETWEEN CONNECTOR C-38 AND CONNECTOR C-02 FOR SHORT BETWEEN CIRCUITS

• Disconnect the connector C-38.

• Connect the connector C-02.

• Connect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Switch the ignition ON (engine off).

• Measure the voltage at body control module (BCM) terminals 3X and 3W.

• Is the voltage at body control module (BCM) terminals 3X and 3W the same?

Yes

Repair or replace the wiring harness between connector C-38 and connector C-02 because the wiring harness is shorted between circuits.

Go to the next step.

INSPECT CAN LINE BETWEEN TCM AND CONNECTOR C-38 FOR SHORT BETWEEN CIRCUITS

• Switch the ignition off.

• Disconnect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Inspect for continuity between TCM terminals E and F.

• Is there continuity?

Yes

Go to the next step.

Go to Step 33.

INSPECT TCM FOR SHORT BETWEEN CIRCUITS

• Disconnect the TCM connector.

• Inspect for continuity between TCM terminals E and F (wiring harness side).

• Is there continuity?

Yes

Repair or replace the wiring harness between the TCM and connector C-38 because the wiring harness is shorted between circuits.

Replace the TCM because there is a short between circuits in the TCM.

(See CONTROL VALVE BODY REMOVAL/INSTALLATION [ET6A-EL, ET6AX-EL (E)].)

(See CONTROL VALVE BODY REMOVAL/INSTALLATION [EV6A-EL, EV6AX-EL (E)].)

INSPECT CAN LINE BETWEEN CONNECTOR C-38 AND CONNECTOR C-01 FOR SHORT BETWEEN CIRCUITS

• Disconnect the connector C-01.

• Connect the connector C-38.

• Connect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Switch the ignition ON (engine off).

• Measure the voltage at body control module (BCM) terminals 3X and 3W.

• Is the voltage at body control module (BCM) terminals 3X and 3W the same?

Yes

Repair or replace the wiring harness between connector C-01 and connector C-38 because the wiring harness is shorted between circuits.

Go to Step 35.

INSPECT CAN LINE BETWEEN CONNECTOR C-02 AND CONNECTOR C-01 FOR SHORT BETWEEN CIRCUITS

• Disconnect the connector C-01.

• Connect the connector C-02.

• Connect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Switch the ignition ON (engine off).

• Measure the voltage at body control module (BCM) terminals 3X and 3W.

• Is the voltage at body control module (BCM) terminals 3X and 3W the same?

Yes

Repair or replace the wiring harness between connector C-02 and connector C-01 because the wiring harness is shorted between circuits.

Go to the next step.

INSPECT PCM FOR SHORT BETWEEN CIRCUITS

• Switch the ignition off.

• Disconnect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

• Disconnect the PCM connector.

• Inspect for continuity between PCM terminals 2S and 2T (wiring harness side). (SKYACTIV-G or SKYACTIV-X)

• Inspect for continuity between PCM terminals 2AK and 2AL (wiring harness side). (SKYACTIV-D)

• Is there continuity?

Yes

Repair or replace the wiring harness between the PCM and connector C-01 because the wiring harness is shorted between circuits.

Replace the PCM because there is a short between circuits in the PCM.

(See PCM REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)

(See PCM REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)

(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

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