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DTC P1D16: Pilot Signal (Charge not Allowed)
DTC P1D18: Pilot Signal Frequency Abnormal
 
 
 
 
TROUBLE JUDGMENT
Check Condition
  • While the on board charger is allowed to charge from PHEV-ECU.
Judgment Criterion
  • <DTC P1D16>
    • The pilot signal is abnormal.
  • <DTC P1D18>
    • The pilot frequency is abnormal.
 
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • The charge is stopped.
 
 
PROBABLE CAUSES
  • Noise shows up on the pilot signal circuit.
  • Open circuits of pilot signal circuit, short circuits to ground, short circuits to power supply system or damage; poor contact of connector
  • The power source facility poorly grounded.
  • The charging cable 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. Check of short circuit to ground, short circuit to power supply system, open circuit and damage in PLT line between normal charging connector and on board charger/DC-DC converter connector.
Is the check result normal?
Go to Step 2.
Repair the connector(s) or wiring harness.
 
STEP 2. Check charging cable itself
  • Check charging cable (Refer to ).
Is the check result normal?
Go to Step 3.
Replace the charging cable.
 
STEP 3. Using scan tool (M.U.T.-IIISE), check on board charger/DC-DC converter data list.
  • Data List Reference Table (Refer to ).
    • Item No.37: Pilot signal (Duty ratio)
Is the check result normal?
Go to Step 4.
Go to Step 5.
 
STEP 4. Using scan tool (M.U.T.-IIISE), check whether the DTC is set.
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 ).
 
STEP 5. Check the power supply ground.
Is the check result normal?
Replace the on board charger/DC-DC converter (Refer to ).
Modify the power supply.