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DTC No. P1AA2-A3: DCDC output voltage failure
 
 
 
 
TROUBLE JUDGMENT
Check Condition
  • The power supply mode of the electric motor switch is ON (READY indicator: ON) or during charging.
Judgment Criterion
  • The output voltage malfunction of 12V system is detected.
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the On Board Charger (OBC)/DC-DC converter
noteThe DTC No. P1AA2-A3 may be set due to the following factor.
• 24V battery is connected inadvertently.
 
 
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).