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DTC No. P1AA1-94: DCDC converter failure(Stop of conversion)
 
 
 
 
 
 
TROUBLE JUDGMENT
Check Condition
  • The power supply mode of the electric motor switch is ON (READY indicator: ON) or during charging.
Judgment Criterion
  • The difference between the output voltage and requested voltage of the DC-DC converter is detected for 10 seconds or more.
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the On Board Charger (OBC)/DC-DC converter
 
 
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.Check whether the DTC is set again.
(1) Erase the set DTC.
(2) Change the power supply mode of the electric motor switch to ON (READY indicator: ON).
(3) Check whether the DTC is set again.
Is the DTC set?
Replace the On Board Charger (OBC)/DC-DC converter (Refer to ON BOARD CHARGER (OBC) &DC-DC CONVERTER 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).