STEP 1. Check the signal line for short to ground 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 (terminal CNTP) and the main drive lithium-ion battery connector.
Is the check result normal?
Go to Step 2. Repair the connector or wiring harness. Then go to Step 8.
STEP 2. Check the CNTB wire between the IGCT relay connector terminal and the PHEV-ECU connector terminal for open circuit.
(1) Disconnect the connector and the IGCT relay and measure at the harness connector side.
(2) Check the wiring harness between PHEV-ECU connector (terminal CNTB) and the IGCT relay connector.
Is the check result normal?
Go to Step 3. Repair the connector or wiring harness. Then go to Step 8.
STEP 3. Check the main drive lithium-ion battery main contactor (P) and (N) <On-vehicle check>.
STEP 4. Test the OBD-II drive cycle.
STEP 5. Check the CNTP wire at the main drive lithium-ion battery connector for short to ground.
STEP 6. Check the signal line for short to ground circuit (main drive lithium-ion battery connector and charging contactor).
STEP 7. Charging contactor check
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.