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DTC P0A0F:00 [PCM (SKYACTIV-X)]

id0102u9950400

Outline

System malfunction location

Engine failed to restart

Detection condition

•  Any of following conditions occurs:

―  When the engine should restart after it is stopped by the i-stop control, it does not start even though it is cranked for 3 s or more.

―  When the engine should restart after it is stopped by the i-stop control, it does not cranked.

Fail-safe

•  Inhibits engine-stop by operating the i-stop function.

Possible cause

•  Related parts malfunction

―  Starter relay malfunction

―  Battery malfunction

―  Wiring harness malfunction between starter relay and PCM, or poor connector contact

―  Starter malfunction

•  DTCs are stored in the following modules.

―  Mazda M Hybrid battery malfunction

―  DC-DC converter (Mazda M Hybrid) malfunction

―  Integrated starter generator (ISG) malfunction

•  Piston stop position malfunction during idling stop

―  Decoupling ring tensioner malfunction

―  ISG drive belt wear

―  CKP sensor signal malfunction

―  Throttle valve operation malfunction (drive-by-wire control malfunction)

―  Intake air system related malfunction

•  Air suction

•  Evaporative hose, ventilation hose breakage

―  Purge control malfunction

―  Engine starting system malfunction

•  Mechanical (engine) malfunction

―  Improper intake valve timing

―  Improper operation of intake electric variable valve timing control system

•  Intake electric variable valve timing driver malfunction

•  Intake electric variable valve timing motor malfunction

•  Intake electric variable valve timing actuator malfunction

―  Improper exhaust valve timing

―  Improper operation of exhaust electric variable valve timing control system

•  Exhaust electric variable valve timing driver malfunction

•  Exhaust electric variable valve timing motor malfunction

•  Exhaust electric variable valve timing actuator malfunction

•  PCM malfunction

System wiring diagram

•  Not applicable

Connector diagram

•  Not applicable

System malfunction location	Engine failed to restart
Detection condition	• Any of following conditions occurs: ― When the engine should restart after it is stopped by the i-stop control, it does not start even though it is cranked for 3 s or more. ― When the engine should restart after it is stopped by the i-stop control, it does not cranked.
Fail-safe	• Inhibits engine-stop by operating the i-stop function.
Possible cause	• Related parts malfunction ― Starter relay malfunction ― Battery malfunction ― Wiring harness malfunction between starter relay and PCM, or poor connector contact ― Starter malfunction • DTCs are stored in the following modules. ― Mazda M Hybrid battery malfunction ― DC-DC converter (Mazda M Hybrid) malfunction ― Integrated starter generator (ISG) malfunction • Piston stop position malfunction during idling stop ― Decoupling ring tensioner malfunction ― ISG drive belt wear ― CKP sensor signal malfunction ― Throttle valve operation malfunction (drive-by-wire control malfunction) ― Intake air system related malfunction • Air suction • Evaporative hose, ventilation hose breakage ― Purge control malfunction ― Engine starting system malfunction • Mechanical (engine) malfunction ― Improper intake valve timing ― Improper operation of intake electric variable valve timing control system • Intake electric variable valve timing driver malfunction • Intake electric variable valve timing motor malfunction • Intake electric variable valve timing actuator malfunction ― Improper exhaust valve timing ― Improper operation of exhaust electric variable valve timing control system • Exhaust electric variable valve timing driver malfunction • Exhaust electric variable valve timing motor malfunction • Exhaust electric variable valve timing actuator malfunction • PCM malfunction
System wiring diagram	• Not applicable
Connector diagram	• Not applicable

Diagnostic Procedure

Step

Inspection

Results

Action

1

RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION

•  Record the freeze frame data/snapshot data.

Note

•  Recording can be facilitated using the screen capture function of the PC.

—

Go to the next step.

2

VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY

•  Verify related Service Bulletins, on-line repair information, or Service Information availability.

•  Is any related Information available?

Yes

Perform repair or diagnosis according to the available information.

•  If the vehicle is not repaired, go to the next step.

No

Go to the next step.

3

INSPECT FOR OTHER RELATED DTCs

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

•  Are any of the following DTCs displayed?

―  P1260:00

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC P1260:00 [PCM (SKYACTIV-X)].)

No

Go to the next step.

4

INSPECT FOR A MALFUNCTION RELATED INABILITY TO START ENGINE

•  Start the engine.

•  Does the engine start normally?

Yes

Go to the next step.

No

Perform the applicable symptom troubleshooting.

(See WILL NOT CRANK [SKYACTIV-X].)

(See HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK [SKYACTIV-X].)

(See CRANKS NORMALLY BUT WILL NOT START [SKYACTIV-X].)

5

DETERMINE IF MALFUNCTION IS CAUSED BY ROUGH IDLING OR A PISTON-STOP POSITION CONTROL MALFUNCTION

•  Start the engine and warm it up completely.

•  Is the idle speed stabilized?

Yes

Go to the next step.

No

Go to Step 12.

6

VERIFY DTCs

•  Perform the DTC inspection for the following modules.
(See DTC INSPECTION.)

―  PCM

―  Mazda M Hybrid battery

―  DC-DC converter (Mazda M Hybrid)

―  Integrated starter generator (ISG)

•  Are any DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [PCM (SKYACTIV-X)].)

(See DTC TABLE [Mazda M Hybrid BATTERY].)

(See DTC TABLE [DC-DC CONVERTER (Mazda M Hybrid)].)

(See DTC TABLE [INTEGRATED STARTER GENERATOR (ISG)].)

No

Go to the next step.

7

INSPECT DECOUPLING RING TENSIONER FOR MALFUNCTION

•  Inspect the applicable part.
(See DECOUPLING RING TENSIONER INSPECTION [SKYACTIV-X 2.0].)

•  Is the part normal?

Yes

Go to the next step.

No

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

(See DECOUPLING RING TENSIONER REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)

8

INSPECT ISG DRIVE BELT FOR MALFUNCTION

•  Inspect the applicable part.
(See DRIVE BELT INSPECTION [SKYACTIV-X 2.0].)

•  Is the part normal?

Yes

Go to the next step.

No

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

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

9

INSPECT CKP SENSOR SIGNAL

•  Verify the CKP sensor signal using the oscilloscope.
(See PCM INSPECTION [SKYACTIV-X 2.0].)

•  Is there any malfunction?

Yes

Go to the next step.

No

Go to Step 11.

10

INSPECT CKP SENSOR PULSE WHEEL

•  Visually inspect the CKP sensor pulse wheel.

•  Are there any damage or scratches at the CKP sensor pulse wheel?

Yes

Replace the CKP sensor pulse wheel and perform the repair completion verification.

No

Inspect the wiring harness between the following terminals:

•  CKP sensor terminal A—PCM terminal 1E

•  CKP sensor terminal C—PCM terminal 1F

•  CKP sensor terminal B—PCM terminal 1AP

―  If there is any malfunction:

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

―  If there is no malfunction:

•  Replace the CKP sensor and perform the repair completion verification.
(See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)

11

INSPECT DRIVE-BY-WIRE CONTROL SYSTEM OPERATION

•  Perform the Drive-by-wire Control System Inspection.
(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [SKYACTIV-X].)

•  Is there any malfunction?

Yes

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

No

Go to repair completion verification.

12

INSPECT VACUUM HOSES CONNECTION

•  Inspect the vacuum hose (such as evaporative hose, ventilation hose) routine.
(See INTAKE-AIR SYSTEM LOCATION INDEX [SKYACTIV-X 2.0].)

(See EMISSION SYSTEM LOCATION INDEX [SKYACTIV-X 2.0].)

•  Are vacuum hoses routines properly?

Yes

Go to the next step.

No

Reconnect the suspected hoses and perform the repair completion verification.

13

INSPECT INTAKE-AIR SYSTEM FOR AIR SUCTION

•  Inspect for leakage in intake-air system.

•  Is there any leakage?

Yes

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

No

Go to the next step.

14

INSPECT PURGE CONTROL SYSTEM OPERATION

•  Perform the Purge Control System Inspection.
(See PURGE SOLENOID VALVE INSPECTION [SKYACTIV-X 2.0].)

•  Is there any malfunction?

Yes

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

(See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)

No

Go to the next step.

15

INSPECT INTAKE ELECTRIC VARIABLE VALVE TIMING DRIVER AND EXHAUST ELECTRIC VARIABLE VALVE TIMING DRIVER FOR MALFUNCTION

•  Inspect the applicable part.
(See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER INSPECTION [SKYACTIV-X 2.0].)

•  Is the part normal?

Yes

Go to the next step.

No

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

(See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)

16

INSPECT INTAKE ELECTRIC VARIABLE VALVE TIMING MOTOR AND EXHAUST ELECTRIC VARIABLE VALVE TIMING MOTOR FOR MALFUNCTION

•  Inspect the applicable part.
(See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER INSPECTION [SKYACTIV-X 2.0].)

•  Is the part normal?

Yes

Go to the next step.

No

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

(See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)

17

INSPECT INTAKE ELECTRIC VARIABLE VALVE TIMING ACTUATOR AND EXHAUST ELECTRIC VARIABLE VALVE TIMING ACTUATOR FOR MALFUNCTION

•  Inspect the applicable part.
(See ELECTRIC VARIABLE VALVE TIMING ACTUATOR INSPECTION [SKYACTIV-X 2.0].)

•  Is the part normal?

Yes

Go to the next step.

No

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

(See ELECTRIC VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)

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.)

•  Replicate the vehicle conditions at the time the DTC was detected using the following procedure.

―  Start the engine and warm it up completely.

―  Stop the engine by operating the i-stop function.

―  Restart the engine.

―  Perform the KOEO or KOER self test.
(See DTC INSPECTION.)

•  Perform the DTC inspection for the PCM.
(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 PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)

No

Go to the next step.

Repair completion verification 2

VERIFY IF OTHER DTCs 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	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION • Record the freeze frame data/snapshot data. Note • Recording can be facilitated using the screen capture function of the PC.	—	Go to the next step.
2	VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY • Verify related Service Bulletins, on-line repair information, or Service Information availability. • Is any related Information available?	Yes	Perform repair or diagnosis according to the available information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT FOR OTHER RELATED DTCs • Perform the DTC inspection for the PCM. (See DTC INSPECTION.) • Are any of the following DTCs displayed? ― P1260:00	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC P1260:00 [PCM (SKYACTIV-X)].)
3		No	Go to the next step.
4	INSPECT FOR A MALFUNCTION RELATED INABILITY TO START ENGINE • Start the engine. • Does the engine start normally?	Yes	Go to the next step.
4		No	Perform the applicable symptom troubleshooting. (See WILL NOT CRANK [SKYACTIV-X].) (See HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK [SKYACTIV-X].) (See CRANKS NORMALLY BUT WILL NOT START [SKYACTIV-X].)
5	DETERMINE IF MALFUNCTION IS CAUSED BY ROUGH IDLING OR A PISTON-STOP POSITION CONTROL MALFUNCTION • Start the engine and warm it up completely. • Is the idle speed stabilized?	Yes	Go to the next step.
5		No	Go to Step 12.
6	VERIFY DTCs • Perform the DTC inspection for the following modules. (See DTC INSPECTION.) ― PCM ― Mazda M Hybrid battery ― DC-DC converter (Mazda M Hybrid) ― Integrated starter generator (ISG) • Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-X)].) (See DTC TABLE [Mazda M Hybrid BATTERY].) (See DTC TABLE [DC-DC CONVERTER (Mazda M Hybrid)].) (See DTC TABLE [INTEGRATED STARTER GENERATOR (ISG)].)
6		No	Go to the next step.
7	INSPECT DECOUPLING RING TENSIONER FOR MALFUNCTION • Inspect the applicable part. (See DECOUPLING RING TENSIONER INSPECTION [SKYACTIV-X 2.0].) • Is the part normal?	Yes	Go to the next step.
7		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See DECOUPLING RING TENSIONER REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
8	INSPECT ISG DRIVE BELT FOR MALFUNCTION • Inspect the applicable part. (See DRIVE BELT INSPECTION [SKYACTIV-X 2.0].) • Is the part normal?	Yes	Go to the next step.
8		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
9	INSPECT CKP SENSOR SIGNAL • Verify the CKP sensor signal using the oscilloscope. (See PCM INSPECTION [SKYACTIV-X 2.0].) • Is there any malfunction?	Yes	Go to the next step.
9		No	Go to Step 11.
10	INSPECT CKP SENSOR PULSE WHEEL • Visually inspect the CKP sensor pulse wheel. • Are there any damage or scratches at the CKP sensor pulse wheel?	Yes	Replace the CKP sensor pulse wheel and perform the repair completion verification.
10		No	Inspect the wiring harness between the following terminals: • CKP sensor terminal A—PCM terminal 1E • CKP sensor terminal C—PCM terminal 1F • CKP sensor terminal B—PCM terminal 1AP ― If there is any malfunction: • Repair or replace the malfunctioning location and perform the repair completion verification. ― If there is no malfunction: • Replace the CKP sensor and perform the repair completion verification. (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
11	INSPECT DRIVE-BY-WIRE CONTROL SYSTEM OPERATION • Perform the Drive-by-wire Control System Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [SKYACTIV-X].) • Is there any malfunction?	Yes	Repair or replace the malfunctioning location and perform the repair completion verification.
11		No	Go to repair completion verification.
12	INSPECT VACUUM HOSES CONNECTION • Inspect the vacuum hose (such as evaporative hose, ventilation hose) routine. (See INTAKE-AIR SYSTEM LOCATION INDEX [SKYACTIV-X 2.0].) (See EMISSION SYSTEM LOCATION INDEX [SKYACTIV-X 2.0].) • Are vacuum hoses routines properly?	Yes	Go to the next step.
12		No	Reconnect the suspected hoses and perform the repair completion verification.
13	INSPECT INTAKE-AIR SYSTEM FOR AIR SUCTION • Inspect for leakage in intake-air system. • Is there any leakage?	Yes	Repair or replace the malfunctioning location and perform the repair completion verification.
13		No	Go to the next step.
14	INSPECT PURGE CONTROL SYSTEM OPERATION • Perform the Purge Control System Inspection. (See PURGE SOLENOID VALVE INSPECTION [SKYACTIV-X 2.0].) • Is there any malfunction?	Yes	Repair or replace the malfunctioning location and perform the repair completion verification. (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
14		No	Go to the next step.
15	INSPECT INTAKE ELECTRIC VARIABLE VALVE TIMING DRIVER AND EXHAUST ELECTRIC VARIABLE VALVE TIMING DRIVER FOR MALFUNCTION • Inspect the applicable part. (See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER INSPECTION [SKYACTIV-X 2.0].) • Is the part normal?	Yes	Go to the next step.
15		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
16	INSPECT INTAKE ELECTRIC VARIABLE VALVE TIMING MOTOR AND EXHAUST ELECTRIC VARIABLE VALVE TIMING MOTOR FOR MALFUNCTION • Inspect the applicable part. (See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER INSPECTION [SKYACTIV-X 2.0].) • Is the part normal?	Yes	Go to the next step.
16		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
17	INSPECT INTAKE ELECTRIC VARIABLE VALVE TIMING ACTUATOR AND EXHAUST ELECTRIC VARIABLE VALVE TIMING ACTUATOR FOR MALFUNCTION • Inspect the applicable part. (See ELECTRIC VARIABLE VALVE TIMING ACTUATOR INSPECTION [SKYACTIV-X 2.0].) • Is the part normal?	Yes	Go to the next step.
17		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See ELECTRIC VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
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.) • Replicate the vehicle conditions at the time the DTC was detected using the following procedure. ― Start the engine and warm it up completely. ― Stop the engine by operating the i-stop function. ― Restart the engine. ― Perform the KOEO or KOER self test. (See DTC INSPECTION.) • Perform the DTC inspection for the PCM. (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 PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
Repair completion verification 1		No	Go to the next step.
Repair completion verification 2	VERIFY IF OTHER DTCs 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.