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DTC P1C05: DCDC Output Current Abnormal
 
 
 
 
TROUBLE JUDGMENT
Check Condition
  • The PHEV-ECU allows the DC-DC converter to operate.
Judgment Criterion
  • The output (B-terminal) current is higher or equal to the specified current.
 
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • The output of DC-DC converter is stopped.
 
 
PROBABLE CAUSE
  • Short circuit in output (+B terminal) power supply circuit, or poor contact of connector.
  • Short circuit in lamps and all accessories (+B terminal) power supply circuit
  • The 12V starter battery 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. Perform the continuity check of the fuse between the on board charger/DC-DC converter (+B terminal) connector and the 12V starter battery.
  • Perform the continuity check of the fuse.
OK: Continuity
Is the check result normal?
Go to Step 2.
Replace the fuse (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - Inspection Service Points For A Blown Fuse ).
 
STEP 2. Check of short to ground in +B line between on board charger/DC-DC converter connector and 12V starter battery.
Is the check result normal?
Go to Step 3.
Repair the connector(s) or wiring harness.
 
STEP 3. Check 12V starter battery
  • Check 12V starter battery (Refer to GROUP 54A - 12V Starter Battery - Battery Test ).
Is the check result normal?
Go to Step 4.
Replace the 12V starter battery.
 
STEP 4. 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 ).