DTC Diagnosis Procedure

1.CHECK NETWORK-DTC

Check the CAN diagnosis results from M.U.T.-III SE to see that the drivetrain CAN communication 2 circuit has no malfunction.

Is the drivetrain CAN communication circuit 2 normal?

Check and repair drivetrain CAN communication 2 circuit.

2.CONNECTOR INSPECTION

Turn the electric motor switch OFF.
Disconnect the 12V battery cable from the negative terminal.
Disconnect all the unit connectors on drivetrain CAN communication 1 circuit.
Check terminals and connectors for damage, bend and loose connection (unit side and harness side).

Is the inspection result normal?

Repair the terminal and connector.

3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

Check the continuity between the chassis control module harness connector and the PHEV-ECU harness connector.

Chassis control module harness connector		PHEV-ECU harness connector		Continuity
Connector No.	Terminal No.	Connector No.	Terminal No.
B36	4	M310	77	Existed
	17		65	Existed

Is the inspection result normal?

Check the harness and repair the root cause.

4.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the chassis control module harness connector terminals.

Chassis control module harness connector			Continuity
Connector No.	Terminal No.
B36	4	17	Not existed

Is the inspection result normal?

Check the harness and repair the root cause.

5.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the chassis control module harness connector and the body ground.

Chassis control module harness connector		Ground	Continuity
Connector No.	Terminal No.
B36	4		Not existed
	17		Not existed

Is the inspection result normal?

Check the harness and repair the root cause.

6.CHECK CHASSIS CONTROL MODULE AND PHEV-ECU TERMINATION CIRCUIT

Remove the chassis control module and the PHEV-ECU.
Check the resistance between the chassis control module terminals.
Chassis control module Resistance (Ω)
Terminal No.
4 17 Approx. 108 – 132
Check the resistance between the PHEV-ECU terminals.
PHEV-ECU Resistance (Ω)
Terminal No.
77 65 Approx. 108 – 132

Is the measurement value within the specification?

Replace the chassis control module and/or the PHEV-ECU.

7.CHECK SYMPTOM

Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with customer)” are reproduced.

Inspection result

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

8.CHECK UNIT REPRODUCTION

Perform the reproduction test as per the following procedure for each unit.

Turn the electric motor switch OFF.
Disconnect the 12V battery cable from the negative terminal.
Disconnect one of the unit connectors of drivetrain CAN 1 communication circuit.
note Chassis control module and PHEV-ECU have a termination circuit. Check other units first.
Connect the 12V battery cable to the negative terminal. Check if the symptoms described in the “Symptom (Results from interview with customer)” are reproduced.
note Although unit-related error symptoms occur, do not confuse them with other symptoms.

Inspection result

: Connect the connector. Check other units as per the above procedure.

: Replace the unit whose connector was disconnected.