STEP 1. Using scan tool (M.U.T.-IIISE), check the data list (Electrical parking driver unit).
STEP 2. Check electrical parking relay.
STEP 3. Check the signal line short to ground circuit (Electrical parking driver unit and electrical parking relay).
STEP 4. Check the power supply line short to power supply circuit (Electrical parking driver actuator and electrical parking relay).
STEP 5. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
Recheck the DTC.(1) Erase the DTC.
(2) Turn off the power supply mode of the electric motor switch.
(3) Turn on the power supply mode of the electric motor switch.
(4) Check the DTC.
Is the DTC set?
Replace the electrical parking driver unit (Refer to GROUP 22A - Electrical Parking Drive Unit ). The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).
STEP 6. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
Recheck the DTC.(1) Erase the DTC.
(2) Turn off the power supply mode of the electric motor switch.
(3) Turn on the power supply mode of the electric motor switch.
(4) Check the DTC.
Is the DTC set?
Replace the PHEV-ECU (Refer to ). The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).