Diagnosis Procedure

1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the 3CH CAN gateway terminals and connectors for damage, bend and loose connection (unit side and connector side).

Is the inspection result normal?

YES

GO TO STEP 2  .

NO

Repair the terminal and connector.

1. Disconnect the connector of 3CH CAN gateway.
2. Check the continuity between the 3CH CAN gateway harness connector terminals.

   3CH CAN gateway harness connector			Continuity
   Connector No.	Terminal No.
   M90	9	13	Existed
   	10	14	Existed

Is the inspection result normal?

YES

GO TO STEP 3  .

NO

Check the harness and repair or replace the root cause.

1. Disconnect all the unit connectors on IT CAN communication system.
2. Check the continuity between the 3CH CAN gateway harness connector terminals.

Is the inspection result normal?

YES

GO TO STEP 4  .

NO

Check the harness and repair or replace the root cause.

Check the continuity between the 3CH CAN gateway harness connector and the ground.

Is the inspection result normal?

YES

GO TO STEP 5  .

NO

Check the harness and repair or replace the root cause.

1. Remove the 3CH CAN gateway.
2. Check the resistance between the 3CH CAN gateway terminals.

   3CH CAN gateway		Resistance (Ω)
   Terminal No.
   9	10	Approx. 108 - 132
   13	14	Approx. 108 - 132

Is the measurement value within the specification?

YES

Start the diagnosis again. Follow the trouble diagnosis procedure when past error is detected.

YES

Error was detected in the IT CAN communication circuit.

NO

Replace the 3CH CAN gateway.