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Inspection Procedure 6: AC inverter system
 
 
danger
 
 
 
 
TROUBLESHOOTING HINTS
  • Damaged wiring harness and connectors
  • Malfunction of the AC inverter
  • Malfunction of the 120V AC socket (floor console)
  • Malfunction of the 120V AC socket (luggage room)
 
 
DIAGNOSIS
Required Special Tools:
  • MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
  • MB992745: V.C.I.-Lite main harness A
  • MB992747: V.C.I.-Lite USB cable short
  • MB992748: V.C.I.-Lite USB cable long
  • MB991223: Wiring harness set
  • MB992006: Extra fine probe
  • MB992355: Electric insulation tester
1.Insulation resistance check of 120V AC socket (floor console)
Check the insulation resistance of the 120V AC socket (floor console) (Refer to CHECK THE INSULATION RESISTANCE IN THE 120V AC SOCKET).
Is the check result normal?
Replace the 120V AC socket (floor console) (Refer to 120V AC SOCKET REMOVAL AND INSTALLATION).
 
2.Insulation resistance check of 120V AC socket (luggage room)
Check the insulation resistance of the 120V AC socket (luggage room) (Refer to CHECK THE INSULATION RESISTANCE IN THE 120V AC SOCKET).
Is the check result normal?
Replace the 120V AC socket (luggage room) (Refer to 120V AC SOCKET REMOVAL AND INSTALLATION).
 
3.Insulation resistance check of wiring harness between AC inverter and 120V AC socket
(1) Disconnect the AC power supply connector (H6) from the AC inverter, and measure the insulation resistance at the wiring harness side.
 
+ terminal– terminalNormal condition
AC+ (No. 2) terminalBody ground10 MΩ or more
AC– (No. 2) terminal
Is the check result normal?
Repair the connector(s) or wiring harness in power supply line between the AC inverter and 120V AC socket.
 
4.Insulation resistance check of AC inverter
Check the insulation resistance of the AC inverter (Refer to CHECK THE INSULATION RESISTANCE IN THE AC INVERTER).
Is the check result normal?
Replace the AC inverter (Refer to AC INVERTER REMOVAL AND INSTALLATION).
 
5.Check whether the DTC is set again.
Is the DTC set?
Perform the "Inspection procedures when BMU P0AA6-00: Insulation Resistance Drop Detection Diagnosis is set." again (Refer to DIAGNOSIS CHART FOR DTC No. P0AA6-00).
The trouble can be an intermittent malfunction (Refer to General Information - How to Use Troubleshooting/Inspection Service Points, How to Cope with Intermittent Malfunctions HOW TO COPE WITH INTERMITTENT MALFUNCTIONS).