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DTC B1172:13 [BODY CONTROL MODULE (BCM) (E)]

id0902r71095s3

Outline

System malfunction location

Front door lock-link switch (driver’s side) unlock circuit malfunction

Detection condition

•  The door-electrical supply unit (driver’s side) detects an open circuit in the front door lock-link switch (driver’s side) unlock circuit for a continuous 2 times.

Preconditions

•  The front door lock-link switch (driver’s side) unlocked.

Fail-safe

Not applicable

Possible cause

•  Front door latch and lock actuator (driver's side) connector or terminal malfunction

•  Open circuit in front door lock-link switch (driver’s side) ground circuit

•  Front door lock-link switch (driver’s side) malfunction

•  Door-electrical supply unit (driver’s side) connector or terminal malfunction

•  Open circuit in front door lock-link switch (driver’s side) unlock circuit

•  Door-electrical supply unit (driver’s side) malfunction

•  Body control module (BCM) malfunction

System malfunction location	Front door lock-link switch (driver’s side) unlock circuit malfunction
Detection condition	• The door-electrical supply unit (driver’s side) detects an open circuit in the front door lock-link switch (driver’s side) unlock circuit for a continuous 2 times. Preconditions • The front door lock-link switch (driver’s side) unlocked.
Fail-safe	Not applicable
Possible cause	• Front door latch and lock actuator (driver's side) connector or terminal malfunction • Open circuit in front door lock-link switch (driver’s side) ground circuit • Front door lock-link switch (driver’s side) malfunction • Door-electrical supply unit (driver’s side) connector or terminal malfunction • Open circuit in front door lock-link switch (driver’s side) unlock circuit • Door-electrical supply unit (driver’s side) malfunction • Body control module (BCM) malfunction

Diagnostic Procedure

Step

Inspection

Results

Action

1

INSPECT FRONT DOOR LATCH AND LOCK ACTUATOR (DRIVER'S SIDE) CONNECTOR FOR MALFUNCTION

•  Inspect the applicable connector and terminal.
(See CONNECTOR INSPECTION.)

•  Are the connector and terminal normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

2

INSPECT FRONT DOOR LOCK-LINK SWITCH (DRIVER’S SIDE) GROUND CIRCUIT FOR OPEN CIRCUIT

•  Inspect the applicable circuit for an open circuit.
(See CIRCUIT INSPECTION.)

•  Is the circuit normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

3

INSPECT FRONT DOOR LOCK-LINK SWITCH (DRIVER’S SIDE) FOR MALFUNCTION

•  Inspect the applicable part.
(See FRONT DOOR LATCH AND LOCK ACTUATOR INSPECTION [(E)].)

•  Is the part normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

(See FRONT DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)

4

INSPECT DOOR-ELECTRICAL SUPPLY UNIT (DRIVER’S SIDE) CONNECTOR FOR MALFUNCTION

•  Inspect the applicable connector and terminal.
(See CONNECTOR INSPECTION.)

•  Are the connector and terminal normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

5

INSPECT FRONT DOOR LOCK-LINK SWITCH (DRIVER’S SIDE) UNLOCK CIRCUIT FOR OPEN CIRCUIT

•  Inspect the applicable circuit for an open circuit.
(See CIRCUIT INSPECTION.)

•  Is the circuit normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

6

INSPECT DOOR-ELECTRICAL SUPPLY UNIT (DRIVER’S SIDE) FOR MALFUNCTION DEPENDING ON REPEATABILITY

•  Install/connect the part removed/disconnected during the troubleshooting procedure.

•  Clear the DTC recorded in the memory.
(See CLEARING DTC.)

•  Perform the DTC inspection for the body control module (BCM) with the front door lock-link switch (driver’s side) unlocked.
(See DTC INSPECTION.)

•  Is the same Pending DTC present?

Yes

Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)

If the CAN communication is normal, replace the door-electrical supply unit (driver’s side) and perform the repair completion verification.

(See DOOR-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION.)

No

Go to repair completion verification 2.

Repair completion verification 1

VERIFY THAT VEHICLE IS REPAIRED

•  Install/connect the part removed/disconnected during the troubleshooting procedure.

•  Clear the DTC recorded in the memory.
(See CLEARING DTC.)

•  Perform the DTC inspection for the body control module (BCM) with the front door lock-link switch (driver’s side) unlocked.
(See DTC INSPECTION.)

•  Is the same Pending DTC present?

Yes

Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)

If the CAN communication is normal, perform the diagnosis from Step 1.

•  If the malfunction recurs, replace the body control module (BCM), then go to the next step.
(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [(E)].)

No

Go to the next step.

Repair completion verification 2

VERIFY IF OTHER DTC IS DISPLAYED

•  Perform the DTC inspection.
(See DTC INSPECTION.)

•  Are any other DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

No

DTC troubleshooting completed.

Step	Inspection	Results	Action
1	INSPECT FRONT DOOR LATCH AND LOCK ACTUATOR (DRIVER'S SIDE) CONNECTOR FOR MALFUNCTION • Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) • Are the connector and terminal normal?	Yes	Go to the next step.
1		No	Repair or replace the malfunctioning location and perform the repair completion verification.
2	INSPECT FRONT DOOR LOCK-LINK SWITCH (DRIVER’S SIDE) GROUND CIRCUIT FOR OPEN CIRCUIT • Inspect the applicable circuit for an open circuit. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
2		No	Repair or replace the malfunctioning location and perform the repair completion verification.
3	INSPECT FRONT DOOR LOCK-LINK SWITCH (DRIVER’S SIDE) FOR MALFUNCTION • Inspect the applicable part. (See FRONT DOOR LATCH AND LOCK ACTUATOR INSPECTION [(E)].) • Is the part normal?	Yes	Go to the next step.
3		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See FRONT DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)
4	INSPECT DOOR-ELECTRICAL SUPPLY UNIT (DRIVER’S SIDE) CONNECTOR FOR MALFUNCTION • Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) • Are the connector and terminal normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification.
5	INSPECT FRONT DOOR LOCK-LINK SWITCH (DRIVER’S SIDE) UNLOCK CIRCUIT FOR OPEN CIRCUIT • Inspect the applicable circuit for an open circuit. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
5		No	Repair or replace the malfunctioning location and perform the repair completion verification.
6	INSPECT DOOR-ELECTRICAL SUPPLY UNIT (DRIVER’S SIDE) FOR MALFUNCTION DEPENDING ON REPEATABILITY • Install/connect the part removed/disconnected during the troubleshooting procedure. • Clear the DTC recorded in the memory. (See CLEARING DTC.) • Perform the DTC inspection for the body control module (BCM) with the front door lock-link switch (driver’s side) unlocked. (See DTC INSPECTION.) • Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, replace the door-electrical supply unit (driver’s side) and perform the repair completion verification. (See DOOR-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION.)
6		No	Go to repair completion verification 2.
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED • Install/connect the part removed/disconnected during the troubleshooting procedure. • Clear the DTC recorded in the memory. (See CLEARING DTC.) • Perform the DTC inspection for the body control module (BCM) with the front door lock-link switch (driver’s side) unlocked. (See DTC INSPECTION.) • Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, perform the diagnosis from Step 1. • If the malfunction recurs, replace the body control module (BCM), then go to the next step. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [(E)].)
Repair completion verification 1		No	Go to the next step.
Repair completion verification 2	VERIFY IF OTHER DTC IS DISPLAYED • Perform the DTC inspection. (See DTC INSPECTION.) • Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
Repair completion verification 2		No	DTC troubleshooting completed.