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Inspection Procedure 5: FAULT Indicator Blinks.
 
 
 
 
COMMENTS ON TROUBLE SYMPTOM
When detecting pilot signal abnormalities or ground leakages of normal charging high voltage circuits, the charging circuit interrupting device should blink the FAULT indicator.
 
 
 
PROBABLE CAUSE
  • The charging cable is failed.
  • Ground leakage of normal charging high voltage system circuits.
  • Short circuit to ground of pilot signal circuit.
  • The on board charger/DC-DC converter is failed.
 
 
 
DIAGNOSIS
Required Special Tools
  • MB991223: Wiring harness set
  • MB992006: Extra fine probe
dangerWhen high voltage system components are served, be sure to pull service plugs to shut down high voltage (Refer to ).
dangerWhen pulling service plugs, wear the specified protective equipment (Refer to ).
STEP 1. Check charging cable itself
  • Check Charging Cable (Refer to ).
Is the check result normal?
Go to Step 2.
Replace the charging cable.
 
STEP 2. Check of short to ground in PLT line between normal charging connector and on board charger/DC-DC converter connector.
Is the check result normal?
Go to Step 3.
Repair the connector(s) or wiring harness.
 
STEP 3. Check the normal charging connector for the insulation resistance.
dangerWhen high voltage system components are serviced, be sure to pull service plugs to shut down high voltage before serving (Refer to ).
dangerWhen pulling service plugs, wear the specified protective equipment (Refer to ).
cautionWhen the insulation resistance is measured, set the range of the special tool electric insulation tester (MB992355) to 500 volts. When the insulation resistance is measured at the range more than 500 volts, the component may be damaged.
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Disconnect the on board charger/DC-DC converter connector.
(3) Use the special tool electric insulation tester (MB992355) to set the range to 500 volts.
(4) Check the insulation resistance between normal charging connector (COLD line and HOT line) and body ground.
OK: 10 MΩ or more
Is the check result normal?
Replace the on board charger/DC-DC converter (Refer to ).
Replace the harness between normal charging connector (COLD line and HOT line) and on board charger/DC-DC converter connector.