STEP 1. Check the signal line for short to power supply circuit (PHEV-ECU connector and main drive lithium-ion battery connector).
(1) Disconnect the connector and measure at the harness connector side.
(2) Check the wiring harness between PHEV-ECU connector and the main drive lithium-ion battery connector (terminal CNT-).
Is the check result normal?
Go to Step 2. Repair the connector or wiring harness. Then go to Step 7.
STEP 2. Voltage measurement at high-voltage, service plug connector
STEP 3. Using scan tool (M.U.T.-IIISE), check whether the other DTC is set.
STEP 4. Using scan tool (M.U.T.-IIISE), check whether the other DTC is set.
STEP 5. Check the electric heater ON failure.
STEP 6. Test the OBD-II drive cycle.
STEP 7. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 3 . (2) Check the DTC.
Is the DTC set?
Retry the troubleshooting. The procedure is complete.