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DTC No. P0A8E-00 High voltage of auxiliary battery fault
 
 
 
 
DTC SET CONDITION
Check Condition
  • The power supply mode of the electric motor switch is ON (READY indicator: ON).
Judgment Criterion
  • High voltage status of the backup power supply is detected for 20 seconds or more.
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the DC-DC converter
  • Malfunction of the PHEV-ECU
  • 24V battery is accidentally connected.
 
 
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
1.M.U.T.-IIISE other system DTC
Check whether the DC-DC converter sets the following DTC.
  • DTC No. P1AA2-A3 DCDC output voltage failure
Is the DTC set?
Troubleshoot the set DTCs.
 
2.Check whether the DTC is set again.
Is the DTC set?
Replace the PHEV-ECU (Refer to PHEV-ECU REMOVAL AND INSTALLATION).
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).