ICC (Full Speed Range)

ICC WARNING CHIME CIRCUIT


Description

- The ICC sensor integrated unit transmits the buzzer output signal to the brake booster control unit via ITS communication.
- The brake booster control unit outputs the buzzer output signal to the ICC warning chime.
- A warning chime sounds when the system is cancelled or when the vehicle distance from the vehicle ahead is too close.




ICC WARNING CHIME CIRCUIT


Diagnosis Procedure

1.CHECK ICC WARNING CHIME POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the ICC warning chime connector.
3. Turn ignition switch ON.
4. Check voltage between ICC warning chime harness connector and ground.





Is the inspection result normal?
YES - GO TO 2.
NO - Repair the harnesses or connectors.
2.CHECK ICC WARNING CHIME SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect brake booster control unit connector.
3. Check for continuity between the ICC warning chime harness connector and brake booster control unit harness connector.





Is the inspection result normal?
YES - GO TO 3.
NO - Repair the harnesses or connectors.
3.CHECK ICC WARNING CHIME SIGNAL CIRCUIT SHORT
Check for continuity between ICC warning chime harness connector and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - Repair the harnesses or connectors.
4.CHECK ICC WARNING CHIME
Check the ICC warning chime. Refer to ICC (Full Speed Range).
Is the inspection result normal?
YES - Replace the brake booster control unit.
NO - Replace the ICC warning chime.