CAN

ITS COMMUNICATION CIRCUIT


Diagnosis Procedure

1.CHECK CAN DIAGNOSIS
Check the CAN diagnosis results from CONSULT-III to see that the CAN communication circuit has no malfunction.

NOTE:
For identification of CAN communication circuit and ITS communication circuit, System Diagram.
Is the CAN communication circuit normal?
YES - GO TO 2.
NO - Check and repair CAN communication circuit.
2.CONNECTOR INSPECTION
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the following terminals and connectors for damage, bend and loose connection (unit side and connector side).
- ICC sensor integrated unit
- Accelerator pedal actuator
- Brake booster control unit
- Harness connector B201
- Harness connector M117
- Harness connector M6
- Harness connector E106
Is the inspection result normal?
YES - GO TO 3.
NO - Repair the terminal and connector.
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the following harness connectors.
- ICC sensor integrated unit
- Brake booster control unit
2. Check the continuity between the ICC sensor integrated unit harness connector and the brake booster control unit harness connector.





Is the inspection result normal?
YES - GO TO 4.
NO - Repair the ICC sensor integrated unit branch line (ITS communication line). System Diagram.
4.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
1. Disconnect the connector of accelerator pedal actuator.
2. Check the continuity between the ICC sensor integrated unit harness connector terminals.





Is the inspection result normal?
YES - GO TO 5.
NO - Check the harness and repair or replace (if shield line is short) the root cause.
5.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
Check the continuity between the ICC sensor integrated unit harness connector and the ground.





Is the inspection result normal?
YES - GO TO 6.
NO - Check the harness and repair or replace (if shield line is short) the root cause.
6.CHECK TERMINATION CIRCUIT
1. Remove the ICC sensor integrated unit and the brake booster control unit.





2. Check the resistance between the ICC sensor integrated unit terminals.

1 : ICC sensor integrated unit and brake booster control unit





3. Check the resistance between the brake booster control unit terminals.





Is the inspection result normal?
YES - GO TO 7.
NO - Replace the ICC sensor integrated unit and/or the brake booster control unit.
7.CHECK SYMPTOM
Connect all the connectors. Check if the symptoms described in the "Symptom (Results from interview with customer)" are reproduced.
Inspection result
Reproduced-Replace the accelerator pedal actuator.
Non-reproduced-Start the diagnosis again. Follow the trouble diagnosis procedure when past error is detected.