DTC P1D26: Inside Temperature Abnormal DTC P1D27: PFC Temperature Abnormal DTC P1D28: Abnormal Temperature In Inverter Circuit 1 DTC P1D29: Abnormal Temperature In Inverter Circuit 2
TROUBLE JUDGMENT
Check Condition
While the on board charger is allowed to charge from PHEV-ECU.
Judgment Criterion
<DTC P1D26>
The internal ambient temperature sensor detects the abnormal temperature.
<DTC P1D27>
The temperature sensor of the power factor correction circuit detects the abnormal temperature.
<DTC P1D28>
The temperature sensor 1 in the voltage booster circuit detects the abnormal temperature.
<DTC P1D29>
The temperature sensor 2 in the voltage booster circuit detects the abnormal temperature.
FAIL-SAFE AND BACKUP FUNCTION
The charge is stopped.
PROBABLE CAUSES
The cooling system is failed.
The on board charger/DC-DC converter is failed.
DIAGNOSIS
Required Special Tools
MB991223: Wiring harness set
MB992006: Extra fine probe
STEP 1. Using scan tool (M.U.T.-IIISE), check on board charger/DC-DC converter data list.
Data List Reference Table (Refer to ).
Item No.38: PFC temperature
Item No.39: Inverter temperature 1
Item No.40: Inverter temperature 2
Item No.41: Inside temperature
Are the check result normal?
Go to Step 2.
Replace the on board charger/DC-DC converter (Refer to ).
STEP 2. Check the cooling system.
Check the overheating [Refer to GROUP 54Da - PHEV-ECU - Symptom Chart - EV system overheat (water cooling system) ].
Is the check result normal?
Go to Step 3.
Repair it.
STEP 3. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
Is the DTC set?
Replace the on board charger/DC-DC converter (Refer to ).
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).