STEP 1. Using scan tool (M.U.T.-IIISE), check whether the other DTC is set.
STEP 2. 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 CNTP).
Is the check result normal?
Go to Step 3. Repair the connector or wiring harness. Then go to Step 8.
STEP 3. Voltage measurement at high-voltage, service plug connector.
STEP 4. Using scan tool (M.U.T.-IIISE), check whether the other DTC is set.
STEP 5. Using scan tool (M.U.T.-IIISE), check whether the other DTC is set.
STEP 6. Check the electric heater ON failure.
STEP 7. Test the OBD-II drive cycle.
STEP 8. 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.