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DTC P1C07: DCDC Inverter Temperature
DTC P1C08: DCDC Rectifier Temperature
DTC P1C09: DCDC Inside Temperature
DTC P1C27: DCDC Inverter Temperature 2
 
 
 
 
TROUBLE JUDGMENT
Check Condition
  • The PHEV-ECU allows the DC-DC converter to operate.
Judgment Criterion
  • <DTC P1C07>
    • The temperature of the inverter temperature sensor 1 is abnormal.
  • <DTC P1C08>
    • The temperature of the output rectifier sensor is abnormal.
  • <DTC P1C09>
    • The temperature of the inside temperature sensor is abnormal.
  • <DTC P1C27>
    • The temperature of the inverter temperature sensor 2 is abnormal.
 
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • The output of DC-DC converter 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 41: Inside temperature
    • Item 55: DCDC inverter temperature 1
    • Item 56: DCDC rectification temperature
    • Item 57: DCDC inverter temperature 2
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
 
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 ).