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Home >> Infiniti >> 2012 >> M35h V6-3.5L (VQ35HR) Hybrid >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> C Code Charts >> C1A6B

C1A6B




DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PRECONDITIONING

If "DTC CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.
- GO TO 2.

2. CHECK DTC DETECTION

With CONSULT
1.Turn the ignition switch OFF to ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
2.Repeat step 1 two times or more.

CAUTION:
Be sure to wait for 5 seconds or more after turning the ignition switch OFF.
3.Turn the ignition switch OFF.
4.Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
5.Turn the ignition switch ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
6.Erase self-diagnosis result of "BRAKE".

CAUTION:
Turn the ignition switch OFF and wait 5 minutes or more after erase self-diagnosis result.
7.Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.
8.Release brake pedal.
9.Repeat steps 7 to 8 three times.
10.Perform "BRAKE" self-diagnosis.
Is DTC "C1A6B" detected?
YES- Proceed to .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK 12V BATTERY

1.Turn the ignition switch OFF.
2.Check the 12V battery terminal connections. Removal and Installation.
3.Check the 12V battery. Testing and Inspection.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace error-detected parts and GO TO 2.

2. PERFORM SELF-DIAGNOSIS (1)

With CONSULT
1.Connect 12V battery cable to negative terminal. Removal and Installation.
2.Turn the ignition switch OFF to ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
3.Repeat step 2 two times or more.

CAUTION:
Be sure to wait for 5 seconds or more after turning the ignition switch OFF.
4.Turn the ignition switch OFF.
5.Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
6.Turn the ignition switch ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
7.Erase self-diagnosis result of "BRAKE".

CAUTION:
Turn the ignition switch OFF and wait 5 minutes or more after erase self-diagnosis result.
8.Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.
9.Release brake pedal.
10.Repeat steps 8 to 9 three times.
11.Perform "BRAKE" self-diagnosis.
Is DTC "C1A6B" detected?
YES- GO TO 3.
NO- INSPECTION END

3. CHECK CONNECTOR TERMINALS

1.Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.

CAUTION:
Never depress brake pedal.
2.Disconnect 12V battery cable from negative terminal. Removal and Installation.
3.Disconnect the electrically-driven intelligent brake unit harness connector, then check for failures of pin terminals and connections.
4.Disconnect the brake power supply backup unit harness connector, then check for failures of pin terminals and connections.
Is the inspection result normal?
YES- GO TO 5.
NO- Repair or replace error-detected parts and GO TO 4.

4. PERFORM SELF-DIAGNOSIS (2)

With CONSULT
1.Connect the electrically-driven intelligent brake unit harness connector.
2.Connect the brake power supply backup unit harness connector.
3.Connect 12V battery cable to negative terminal. Removal and Installation.
4.Turn the ignition switch OFF to ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
5.Repeat step 4 two times or more.

CAUTION:
Be sure to wait for 5 seconds or more after turning the ignition switch OFF.
6.Turn the ignition switch OFF.
7.Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
8.Turn the ignition switch ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
9.Erase self-diagnosis result of "BRAKE".

CAUTION:
Turn the ignition switch OFF and wait 5 minutes or more after erase self-diagnosis result.
10.Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.
11.Release brake pedal.
12.Repeat steps 10 to 11 three times.
13.Perform "BRAKE" self-diagnosis.
Is DTC "C1A6B" detected?
YES- GO TO 5.
NO- INSPECTION END

5. CHECK IGNITION POWER SUPPLY

1.Connect the electrically-driven intelligent brake unit harness connector.
2.Connect the brake power supply backup unit harness connector.
3.Connect 12V battery cable to negative terminal. Removal and Installation.
4.Turn the ignition switch OFF.
5.Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.

CAUTION:
Never depress brake pedal.
6.Disconnect 12V battery cable to negative terminal. Removal and Installation.
7.Disconnect the electrically-driven intelligent brake unit harness connector.
8.Connect 12V battery cable to negative terminal. Removal and Installation.
9.Check voltage between the electrically-driven intelligent brake unit harness connector and ground.





10.Turn the ignition switch ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
11.Check voltage between the electrically-driven intelligent brake unit harness connector and ground.





Is the inspection result normal?
YES- GO TO 8.
NO- GO TO 6.

6. CHECK IGNITION POWER SUPPLY CIRCUIT

1.Turn the ignition switch OFF.
2.Disconnect 12V battery cable to negative terminal. Removal and Installation.
3.Check 10A fuse (#46).
4.Disconnect IPDM E/R harness connector.
5.Check continuity between electrically-driven intelligent brake unit and IPDM E/R.





6.Check continuity between electrically-driven intelligent brake unit harness connector and ground.





Is the inspection result normal?
YES- Perform trouble diagnosis for ignition power supply. Ignition Power Supply.
NO- Repair or replace error-detected parts and GO TO 7.

7. PERFORM SELF-DIAGNOSIS (3)

With CONSULT
1.Connect the electrically-driven intelligent brake unit harness connector.
2.Connect IPDM E/R harness connector.
3.Connect 12V battery cable to negative terminal. Removal and Installation.
4.Turn the ignition switch OFF to ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
5.Repeat step 4 two times or more.

CAUTION:
Be sure to wait for 5 seconds or more after turning the ignition switch OFF.
6.Turn the ignition switch OFF.
7.Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
8.Turn the ignition switch ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
9.Erase self-diagnosis result of "BRAKE".

CAUTION:
Turn the ignition switch OFF and wait 5 minutes or more after erase self-diagnosis result.
10.Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.
11.Release brake pedal.
12.Repeat steps 10 to 11 three times.
13.Perform "BRAKE" self-diagnosis.
Is DTC "C1A6B" detected?
YES- GO TO 8.
NO- INSPECTION END

8. CHECK 12V BATTERY POWER SUPPLY

1.Turn the ignition switch OFF.
2.Disconnect 12V battery cable to negative terminal. Removal and Installation.
3.Disconnect the electrically-driven intelligent brake unit harness connector.
4.Connect 12V battery cable to negative terminal. Removal and Installation.
5.Check voltage between the electrically-driven intelligent brake unit harness connector terminal.





6.Turn the ignition switch ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
7.Check voltage between the electrically-driven intelligent brake unit harness connector terminal.





Is the inspection result normal?
YES- GO TO 11.
NO- GO TO 9.

9. CHECK 12V BATTERY POWER SUPPLY CIRCUIT

1.Turn the ignition switch OFF.
2.Disconnect 12V battery cable to negative terminal. Removal and Installation.
3.Check 50A fusible link (#D).
4.Check continuity and for short circuit between electrically-driven intelligent brake unit harness connector terminal (1) and 50A fusible link (#D).
5.Check continuity and for short circuit between electrically-driven intelligent brake unit harness connector terminal (2) and 50A fusible link (#D).
6.Check 10A fuse (#65).
7.Check continuity and for short circuit between electrically-driven intelligent brake unit harness connector terminal (11) and 10A fuse (#65).
Is the inspection result normal?
YES- Perform diagnosis for 12V battery power supply. Battery Power Supply.
NO- Repair or replace error-detected parts and GO TO 10.

10. PERFORM SELF-DIAGNOSIS (4)

With CONSULT
1.Connect the electrically-driven intelligent brake unit harness connector.
2.Connect 12V battery cable to negative terminal. Removal and Installation.
3.Turn the ignition switch OFF to ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
4.Repeat step 3 two times or more.

CAUTION:
Be sure to wait for 5 seconds or more after turning the ignition switch OFF.
5.Turn the ignition switch OFF.
6.Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
7.Turn the ignition switch ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
8.Erase self-diagnosis result of "BRAKE".

CAUTION:
Turn the ignition switch OFF and wait 5 minutes or more after erase self-diagnosis result.
9.Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.
10.Release brake pedal.
11.Repeat steps 9 to 10 three times.
12.Perform "BRAKE" self-diagnosis.
Is DTC "C1A6B" detected?
YES- GO TO 11.
NO- INSPECTION END

11. CHECK GROUND CIRCUIT

1.Disconnect 12V battery cable to negative terminal. Removal and Installation.
2.Disconnect the electrically-driven intelligent brake unit harness connector.
3.Check continuity between electrically-driven intelligent brake unit and ground.





Is the inspection result normal?
YES- GO TO 13.
NO- Repair or replace error-detected parts and GO TO 12.

12. PERFORM SELF-DIAGNOSIS (5)

With CONSULT
1.Connect the electrically-driven intelligent brake unit harness connector.
2.Connect 12V battery cable to negative terminal. Removal and Installation.
3.Turn the ignition switch OFF to ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
4.Repeat step 3 two times or more.

CAUTION:
Be sure to wait for 5 seconds or more after turning the ignition switch OFF.
5.Turn the ignition switch OFF.
6.Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
7.Turn the ignition switch ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
8.Erase self-diagnosis result of "BRAKE".

CAUTION:
Turn the ignition switch OFF and wait 5 minutes or more after erase self-diagnosis result.
9.Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.
10.Release brake pedal.
11.Repeat steps 9 to 10 three times.
12.Perform "BRAKE" self-diagnosis.
Is DTC "C1A6B" detected?
YES- GO TO 13.
NO- INSPECTION END

13. CHECK DATA MONITOR (1)

With CONSULT
1.Connect the electrically-driven intelligent brake unit harness connector.
2.Connect 12V battery cable to negative terminal. Removal and Installation.
3.Turn the ignition switch OFF to ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
4.Repeat step 3 two times or more.

CAUTION:
Be sure to wait for 5 seconds or more after turning the ignition switch OFF.
5.Select "BRAKE", "DATE MONITOR" according this order.
6.Check "MOTOR POWER SUPPLY" and "CONTROL MODULE POWER". Pinout Values and Diagnostic Parameters.
Is the inspection result normal?
YES- GO TO 14.
NO- Replace the electrically-driven intelligent brake unit. Removal and Installation.

14. PERFORM SELF-DIAGNOSIS (2)

With CONSULT
1.Turn the ignition switch OFF to ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
2.Repeat step 1 two times or more.

CAUTION:
Be sure to wait for 5 seconds or more after turning the ignition switch OFF.
3.Turn the ignition switch OFF.
4.Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
5.Turn the ignition switch ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
6.Erase self-diagnosis result of "BRAKE".

CAUTION:
Turn the ignition switch OFF and wait 5 minutes or more after erase self-diagnosis result.
7.Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.
8.Release brake pedal.
9.Repeat steps 7 to 8 three times.
10.Perform "BRAKE" self-diagnosis.
Is DTC "C1A6B" detected?
YES- GO TO 15.
NO- INSPECTION END

15. CHECK BRAKE POWER SUPPLY BACKUP UNIT CIRCUIT

1.Turn the ignition switch OFF.
2.Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
3.Disconnect the electrically-driven intelligent brake unit harness connector.
4.Disconnect the brake power supply backup unit harness connector.
5.Check continuity between electrically-driven intelligent brake unit and brake power supply backup unit.





6.Check continuity between electrically-driven intelligent brake unit and ground.





Is the inspection result normal?
YES- GO TO 16.
NO- Repair or replace error-detected parts and GO TO 16.

16. CHECK DATA MONITOR (2)

With CONSULT
1.Connect the electrically-driven intelligent brake unit harness connector.
2.Connect the brake power supply backup unit harness connector.
3.Turn the ignition switch OFF to ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
4.Repeat step 3 two times or more.

CAUTION:
Be sure to wait for 5 seconds or more after turning the ignition switch OFF.
5.Select "BRAKE" and "DATA MONITOR" according this order.
6.Check "BACKUP UNIT DIAG RESULT". Pinout Values and Diagnostic Parameters.
What was the displayed data monitor result?
"NORMAL"-INSPECTION END
"ERR1"- GO TO 17.
"ERR2"- GO TO 18.
"ERR3"- Replace the brake power supply backup unit. Removal and Installation.
"ERR4"- Replace the brake power supply backup unit. Removal and Installation.
"ERR5"- Replace the brake power supply backup unit. Removal and Installation.
"ERR6"- Replace the brake power supply backup unit. Removal and Installation.
"ERR7"- GO TO 19.
"ERR8"- GO TO 17.
"ERR9"- Replace the brake power supply backup unit. Removal and Installation.
"ERR10"-Replace the brake power supply backup unit. Removal and Installation.
"ERR11"-Replace the brake power supply backup unit. Removal and Installation.
"ERR12"-GO TO 17.
"ERR13"-Replace the brake power supply backup unit. Removal and Installation.
"ERR14"-Replace the brake power supply backup unit. Removal and Installation.
"ERR15"-GO TO 20.

17. CHECK CIRCUIT BETWEEN ELECTRICALLY-DRIVEN INTELLIGENT BRAKE UNIT AND BRAKE

POWER SUPPLY BACKUP UNIT (1)
1.Turn the ignition switch OFF.
2.Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
3.Disconnect the electrically-driven intelligent brake unit harness connector.
4.Disconnect the brake power supply backup unit harness connector.
5.Check continuity between electrically-driven intelligent brake unit and ground.





Is the inspection result normal?
YES- Replace the brake power supply backup unit. Removal and Installation.
NO- Repair or replace error-detected parts.

18. CHECK CIRCUIT BETWEEN ELECTRICALLY-DRIVEN INTELLIGENT BRAKE UNIT AND BRAKE

POWER SUPPLY BACKUP UNIT (2)
1.Turn the ignition switch OFF.
2.Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
3.Disconnect the electrically-driven intelligent brake unit harness connector.
4.Disconnect the brake power supply backup unit harness connector.
5.Check continuity between electrically-driven intelligent brake unit and brake power supply backup unit.





6.Check continuity between electrically-driven intelligent brake unit and ground.





Is the inspection result normal?
YES- Replace the brake power supply backup unit. Removal and Installation.
NO- Repair or replace error-detected parts.

19. CHECK CIRCUIT BETWEEN ELECTRICALLY-DRIVEN INTELLIGENT BRAKE UNIT AND BRAKE

POWER SUPPLY BACKUP UNIT (3)
1.Turn the ignition switch OFF.
2.Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
3.Disconnect the electrically-driven intelligent brake unit harness connector.
4.Disconnect the brake power supply backup unit harness connector.
5.Check continuity between electrically-driven intelligent brake unit and brake power supply backup unit.





6.Check continuity between electrically-driven intelligent brake unit and ground.





Is the inspection result normal?
YES- Replace the brake power supply backup unit. Removal and Installation.
NO- Repair or replace error-detected parts.

20. CHECK BRAKE POWER SUPPLY BACKUP UNIT POWER

1.Turn the ignition switch OFF.
2.Close all doors including the trunk, and wait for 5 minutes or more.
3.Disconnect the brake power supply backup unit harness connector.
4.Turn the ignition switch ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
5.Check voltage between brake power supply backup unit and ground.





Is the inspection result normal?
YES- Replace the brake power supply backup unit. Removal and Installation.
NO- GO TO 21.

21. CHECK BRAKE POWER SUPPLY BACKUP UNIT POWER CIRCUIT

1.Check 15A fuse (#66).
2.Check continuity and for short circuit between brake power supply backup unit harness connector terminal (3) and 15A fuse (#66).
Is the inspection result normal?
YES- Perform diagnosis for 12V battery power supply. Battery Power Supply.
NO- Repair or replace error-detected parts.
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