DTC Diagnosis Procedure

1.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 2 communication 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.

2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

Check the continuity between the PHEV-ECU harness connector and the 8CH CAN gateway harness connector.

PHEV-ECU harness connector		8CH CAN gateway harness connector		Continuity
Connector No.	Terminal No.	Connector No.	Terminal No.
M310	66	M16	6	Existed
	67		7	Existed

Is the inspection result normal?

Check the harness and repair the root cause.

3.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the PHEV-ECU harness connector terminals.

Is the inspection result normal?

Check the harness and repair the root cause.

4.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the PHEV-ECU harness connector and the body ground.

Is the inspection result normal?

Check the harness and repair the root cause.

5.CHECK PHEV-ECU AND IPDM E/R TERMINATION CIRCUIT

Remove the PHEV-ECU and the 8CH CAN gateway.
Check the resistance between the PHEV-ECU terminals.
PHEV-ECU Resistance (Ω)
Terminal No.
66 67 Approx. 108 – 132
Check the resistance between the 8CH CAN gateway terminals.
8CH CAN gateway Resistance (Ω)
Terminal No.
6 7 Approx. 108 – 132

Is the measurement value within the specification?

Replace the PHEV-ECU and/or the 8CH CAN gateway.

6.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.

7.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 communication 2 circuit.
note PHEV-ECU and 8CH CAN gateway 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.