STEP 1. Using scan tool (M.U.T.-IIISE), check whether the other DTC is set.
STEP 2. Measure the resistance in the IGCT line between the REMCU connector and the IGCT control relay connector.
(1) Disconnect the REMCU connector.
(2) Remove the IGCT control relay.
(3) Measure the resistance between the REMCU connector (IGCT terminal) and the relay box 3 (IGCT control relay connector).OK: Continuity exists (2 Ω or less)
Is the check result normal?
Replace the REMCU (Refer to ). Replace the wiring harness (IGCT line).
STEP 3. 12V starter battery check
STEP 4. Using scan tool (M.U.T.-IIISE), check whether the other DTC is set.
STEP 6. Measure the resistance in the 12V starter battery line between the 12V starter battery positive terminal and the IGCT control relay connector.
(1) Disconnect the 12V starter battery positive terminal.
(2) Remove the IGCT control relay.
(3) Measure the resistance between the 12V starter battery positive terminal and the relay box 3 (IGCT control relay connector).OK: Continuity exists (2 Ω or less)
Is the check result normal?
Go to Step 7. Replace the wiring harness (12V starter battery line).
STEP 7. Measure the resistance in the CTLM line between the PHEV-ECU connector and the IGCT control relay connector.
(1) Disconnect the PHEV-ECU connector.
(2) Remove the IGCT control relay.
(3) Measure the resistance between the PHEV-ECU connector (CTLM terminal) and the relay box 3 (IGCT control relay connector).OK: Continuity exists (2 Ω or less)
Is the check result normal?
Replace the PHEV-ECU (Refer to GROUP 54Da - PHEV-ECU ). Replace the wiring harness (CTLM line).