C1A66
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 "C1A66" 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 1 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 "C1A66" 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 master cylinder fluid pressure sensor1 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 master cylinder fluid pressure sensor1 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 "C1A66" 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 12V battery cable to negative terminal. Removal and Installation.
3.Turn the ignition switch OFF.
4.Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
CAUTION:
Never depress brake pedal.
5.Disconnect 12V battery cable to negative terminal. Removal and Installation.
6.Disconnect the electrically-driven intelligent brake unit harness connector.
7.Connect 12V battery cable to negative terminal. Removal and Installation.
8.Check voltage between the electrically-driven intelligent brake unit harness connector and ground.
9.Turn the ignition switch ON.
CAUTION:
Never set the vehicle to READY/Never start the engine.
10.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 master cylinder fluid pressure sensor1 harness connector.
3.Connect IPDM E/R 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 4 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 "C1A66" 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 "C1A66" 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 "C1A66" 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" 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 (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 "C1A66" detected?
YES- GO TO 15.
NO- INSPECTION END
15. CHECK MASTER CYLINDER FLUID PRESSURE SENSOR1 INSTALLATION
1.Turn the ignition switch OFF.
2.Check master cylinder fluid pressure sensor1 for looseness and disconnection.
Is the inspection result normal?
YES- GO TO 16.
NO- Repair or replace error-detected parts and GO TO 16.
16. 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 "C1A66" detected?
YES- GO TO 17.
NO- INSPECTION END
17. CHECK MASTER CYLINDER FLUID PRESSURE SENSOR1 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 12V battery cable to negative terminal. Removal and Installation.
4.Disconnect master cylinder fluid pressure sensor1 harness connector.
5.Disconnect the electrically-driven intelligent brake unit harness connector.
6.Check continuity between master cylinder fluid pressure sensor1 harness connector and electrically driven intelligent brake unit harness connector.
Is the inspection result normal?
YES- GO TO 18.
NO- Repair or replace error-detected parts and GO TO 20.
18. CHECK MASTER CYLINDER FLUID PRESSURE SENSOR1 POWER CIRCUIT
1.Turn the ignition switch OFF.
2.Connect the electrically-driven intelligent brake unit harness connector.
3.Connect 12V battery cable to negative terminal. Removal and Installation.
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.Check the master cylinder fluid pressure sensor1 power voltage.
Is the inspection result normal?
YES- GO TO 19.
NO- Repair or replace error-detected parts and GO TO 19.
19. CHECK DATA MONITOR (2)
With CONSULT
1.Disconnect 12V battery cable to negative terminal. Removal and Installation.
2.Connect master cylinder fluid pressure sensor1 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.Select "BRAKE" and "DATA MONITOR" according this order.
7.Check "MASTER CYL PRESSURE". Pinout Values and Diagnostic Parameters.
Is the inspection result normal?
YES- GO TO 20.
NO- Replace the electrically-driven intelligent brake unit. Removal and Installation.
20. PERFORM SELF-DIAGNOSIS (8)
With CONSULT
1.Connect master cylinder fluid pressure sensor1 harness connector.
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 "C1A66" detected?
YES- GO TO 21.
NO- INSPECTION END
21. CHECK MASTER CYLINDER PRESSURE SENSOR1
1.Turn the ignition switch OFF.
2.Connect following terminals between master cylinder pressure sensor1 and harness connector (test harness).
3.Turn the ignition switch ON.
CAUTION:
Never set the vehicle to READY/Never start the engine.
4.Check that the voltage between master cylinder pressure sensor1 harness connector changes with the depth of pedal depression.
CAUTION:
Never short out the terminals while measuring voltages.
Is the inspection result normal?
YES- Replace the electrically-driven intelligent brake unit. Removal and Installation.
NO- Replace the master cylinder pressure sensor1. Removal and Installation.