C1A68
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 "C1A68" 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 "C1A68" detected?
YES- GO TO3.
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 stop lamp OFF relay 1 harness connector, then check for failures of pin terminals and connections.
5.Disconnect the stop lamp OFF relay 2 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 stop lamp OFF relay 1 harness connector.
3.Connect stop lamp OFF relay 2 harness connector.
4.Connect 12V battery cable to negative terminal. Removal and Installation.
5.Turn the ignition switch OFF to ON.
CAUTION:
Never set the vehicle to READY/Never start the engine.
6.Repeat step 5 two times or more.
CAUTION:
Be sure to wait for 5 seconds or more after turning the ignition switch OFF.
7.Turn the ignition switch OFF.
8.Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
9.Turn the ignition switch ON.
CAUTION:
Never set the vehicle to READY/Never start the engine.
10.Erase self-diagnosis result of "BRAKE".
CAUTION:
Turn the ignition switch OFF and wait 5 minutes or more after erase self-diagnosis result.
11.Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.
12.Release brake pedal.
13.Repeat steps 11 to 12 three times.
14.Perform "BRAKE" self-diagnosis.
Is DTC "C1A68" 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 stop lamp OFF relay 1 harness connector.
3.Connect stop lamp OFF relay 2 harness connector.
4.Connect 12V battery cable to negative terminal. Removal and Installation.
5.Turn the ignition switch OFF.
6.Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
CAUTION:
Never depress brake pedal.
7.Disconnect 12V battery cable to negative terminal. Removal and Installation.
8.Disconnect the electrically-driven intelligent brake unit harness connector.
9.Connect 12V battery cable to negative terminal. Removal and Installation.
10.Check voltage between the electrically-driven intelligent brake unit harness connector and ground.
11.Turn the ignition switch ON.
CAUTION:
Never set the vehicle to READY/Never start the engine.
12.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 (2)
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 "C1A68" 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 (3)
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 "C1A68" 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 (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 "C1A68" detected?
YES- GO TO 13.
NO- INSPECTION END
13. CHECK DATA MONITOR
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" and "DATA 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 (5)
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 any DTC "C1A67" or "C1A68" detected?
YES("C1A67")-Proceed to C1A67.
YES("C1A68")-GO TO 15.
NO- INSPECTION END
15. PERFORM ACTIVE TEST (1)
With CONSULT
Perform "ACTIVE TEST" without depressing the brake pedal. Scan Tool Testing and Procedures.
CAUTION:
- After the stop lamp OFF relay is activated, wait for 10 seconds to deactivate it.
- Wait for 10 seconds after the stop lamp OFF relay is deactivated.
- GO TO 16.
16. PERFORM SELF-DIAGNOSIS (6)
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 "C1A68" detected?
YES- GO TO 17.
NO- GO TO 19.
17. CHECK STOP LAMP OFF RELAY 1 CIRCUIT (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 stop lamp OFF relay 1 harness connector.
4.Disconnect the electrically-driven intelligent brake unit harness connector.
5.Check continuity between stop lamp OFF relay 1 and electrically-driven intelligent brake unit harness connector.
Is the inspection result normal?
YES- GO TO 18.
NO- Repair or replace error-detected parts.
18. CHECK STOP LAMP OFF RELAY 1
Check stop lamp OFF relay 1. .
Is the inspection result normal?
YES- GO TO 19.
NO- Replace the stop lamp OFF relay 1.
19. PERFORM ACTIVE TEST (2)
With CONSULT
1.Connect stop lamp OFF relay harness connector.
2.Perform "ACTIVE TEST" with the brake pedal depressed. Scan Tool Testing and Procedures.
CAUTION:
- After the stop lamp OFF relay is activated, wait for 10 seconds to deactivate it.
- Wait for 10 seconds after the stop lamp OFF relay is deactivated.
- GO TO 20.
20. PERFORM SELF-DIAGNOSIS (7)
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 "C1A68" detected?
YES- GO TO 21.
NO- INSPECTION END
21. CHECK STOP LAMP OFF RELAY 2
With CONSULT
1.Disconnect ICC brake switch harness connector.
2.Perform "ACTIVE TEST". Scan Tool Testing and Procedures.
3.Check voltage between the ICC brake switch harness connector and ground.
Is the inspection result normal?
YES- INSPECTION END
NO- Replace the electrically-driven intelligent brake unit. Removal and Installation.
Component Inspection
1. CHECK STOP LAMP OFF RELAY 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.Apply 12 V between stop lamp OFF relay 1 connector terminals (1 and 2).
CAUTION:
- Never make the terminals short.
- Connect the fuse between terminals when applying the voltage.
4.Check resistance between stop lamp OFF relay connector terminals.
Is the inspection result normal?
YES- GO TO 2.
NO- Replace the stop lamp OFF relay 1. GO TO 2.
2. CHECK STOP LAMP OFF RELAY 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.Apply 12 V between stop lamp OFF relay 2 connector terminals (2 and 1).
CAUTION:
- Never make the terminals short.
- Connect the fuse between terminals when applying the voltage.
4.Check resistance between stop lamp OFF relay connector terminals.
Is the inspection result normal?
YES- INSPECTION END.
NO- Replace the stop lamp OFF relay 2.