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DTC P1C19: DCDC Low Temperature Abnormal
 
 
 
 
TROUBLE JUDGMENT
Check Condition
  • The PHEV-ECU allows the DC-DC converter to operate.
Judgment Criterion
  • The temperature of the inside temperature sensor, the DCDC rectification temperature sensor, the DCDC inverter temperature sensor 1 or the DCDC inverter temperature sensor is lower or equal to the specified temperature.
 
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • The output of DC-DC converter is stopped.
 
 
PROBABLE CAUSE
  • The ambient temperature is extremely low.
  • The DC-DC converter is failed.
 
 
 
 
DIAGNOSIS
Required Special Tools
  • MB991223: Wiring harness set
  • MB992006: Extra fine probe
STEP 1. Check the ambient temperature.
Is the ambient temperature extremely low?
Check again under the condition the ambient temperature is not extremely low.
Go to Step 2.
 
STEP 2. Using scan tool (M.U.T.-IIISE), check on board charger/DC-DC converter data list.
  • Data List Reference Table (Refer to ).
    • Item No.41: Inside temperature
    • Item No.55: DCDC inverter temperature 1
    • Item No.56: DCDC rectification temperature
    • Item No.57: DCDC inverter temperature 2
Are the check result normal?
Go to Step 3.
Replace the on board charger/DC-DC converter (Refer to ).
 
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 ).