The Braking Distance Is Long

THE BRAKING DISTANCE IS LONG

Description

Brake stopping distance is long when ABS function is operated.


Diagnosis Procedure


CAUTION:
Brake stopping distance on slippery road like rough road, gravel road, or snowy road may become longer when ABS is operated than when ABS is not operated.

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 "C1A74" 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.
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 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 any DTC detected?
YES- Check the DTC. Testing and Inspection. 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 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 any DTC detected?
YES- Check the DTC. Testing and Inspection. 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 any DTC detected?
YES- Check the DTC. Testing and Inspection. 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 any DTC detected?
YES- Check the DTC. Testing and Inspection. 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 (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 any DTC detected?
YES- Check the DTC. Testing and Inspection.
NO- GO TO 15.

15. CHECK BRAKING FORCE

Check the braking force.
Is the inspection result normal?
YES- GO TO 16.
NO- Check each component of brake system.

16. CHECK BRAKE PERFORMANCE

Turn the ignition switch OFF. Disconnect ABS actuator control unit harness connector so that ABS does not operate. Check brake stopping distance in this condition. Connect harness connectors after checking.
Is the inspection result normal?
YES- Normal
NO- Check each component of brake system.