Diagnosis Procedure

Diagnosis Procedure

1. 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).

      • Data link connector

      • 8CH CAN gateway

   Is the inspection result normal?

   YES >>

   GO TO 2.

   NO >>

   Repair the terminal and connector.

2. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

   1. Disconnect the connector of 8CH CAN gateway.

   2. Check the continuity between the 8CH CAN gateway harness connector terminals.

      8CH CAN gateway harness connector			Continuity
      Connector No.	Terminal No.
      M37	13	29	Existed
      	14	30	Existed

   Is the inspection result normal?

   YES >>

   GO TO 3.

   NO >>

   Check the harness and repair or replace the root cause.

3. CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

   Check the continuity between the 8CH CAN gateway harness connector terminals.

   8CH CAN gateway harness connector			Continuity
   Connector No.	Terminal No.
   M37	13	14	Not existed

   Is the inspection result normal?

   YES >>

   GO TO 4.

   NO >>

   Check the harness and repair or replace the root cause.

4. CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

   Check the continuity between the 8CH CAN gateway harness connector and the ground.

   8CH CAN gateway harness connector		Ground	Continuity
   Connector No.	Terminal No.
   M37	13		Not existed
   	14		Not existed

   Is the inspection result normal?

   YES >>

   GO TO 5.

   NO >>

   Check the harness and repair or replace the root cause.

5. CHECK TERMINATION CIRCUIT

   1. Remove the 8CH CAN gateway.

   2. Check the resistance between the 8CH CAN gateway terminals.

      8CH CAN gateway		Resistance (Ω)
      Terminal No.
      13	14	Approx. 108 – 132
      29	30	Approx. 108 – 132

   Is the measurement value within the specification?

   YES (Present error) >>

   Check CAN system type decision again.

   YES (Past error) >>

   Error was detected in the diagnostic CAN communication circuit.

   NO >>

   Replace the 8CH CAN gateway.