Diagnostic Test

1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the follow terminals and connectors for damage, bend and loose connection (unit side and connector side).
   • Driver seat control unit
   • Harness connectors B600 and B12

Is the inspection result normal?

YES 

GO TO STEP 2  .

NO 

Repair the terminal and connector.

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

   CAN gateway harness connector			Continuity
   Connector No.	Terminal No.
   M24	4	6	Existed
   	10	12	Existed

Is the inspection result normal?

YES 

GO TO STEP 3  .

NO 

Check the harness and repair or replace (if shield line is open) the root cause (CAN communication circuit 2 side).

1. Connect the connector of CAN gateway. (Models with around view monitor system)
2. Disconnect the connector of driver seat control unit.
3. Check the resistance between the driver seat control unit harness connector terminals.

   Driver seat control unit harness connector			Resistance (Ω)
   Connector No.	Terminal No.
   B601	1	17	Approx. 54 - 66

Is the measurement value within the specification?

YES 

GO TO STEP 4  .

NO 

Repair the driver seat control unit branch line.

Check the power supply and the ground circuit of the driver seat control unit. Refer to DIAGNOSIS PROCEDURE .

Is the inspection result normal?

YES (Present error) 

Replace the driver seat control unit. Refer to REMOVAL AND INSTALLATION .

YES (Past error) 

Error was detected in the driver seat control unit branch line.

NO 

Repair the power supply and the ground circuit.