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DTC No. U2252-08 ICC output is failure or communication error
noteWhen the chassis number writing, MAC KEY writing or vehicle specification writing is carried out for the PHEV-ECU or ADAS control unit 2, this DTC may be set. If these writings have been carried out, check the followings before the diagnosis.
  1. Check whether the DTC No. U2252-08 is set.
    • When the DTC is set as a past trouble: Erase the DTC, then end the diagnosis.
    • When the DTC is set as a current trouble: Carry out the following procedures.
      1. Start the engine (set the drive mode to battery charge mode, or start the continuous idling mode) or drive the vehicle at 5 km/h (3 mph) or more.
      2. Change the power supply mode of the electric motor switch to OFF.
      3. Change the power supply mode of the electric motor switch to ON.
      4. Check whether the DTC No. U2252-08 is set.
        • When the DTC is set as a current trouble: Carry out the diagnosis procedures for the DTC No. U2252-08.
        • When the DTC is set as a past trouble: Erase the DTC, then end the diagnosis.
 
 
 
 
DTC SET CONDITION
Check Condition
  • The power supply mode of the electric motor switch is ON.
Judgment Criterion
  • The CAN signal from the ADAS control unit 2 can not be received for 2 seconds or more, or abnormal signal is detected.
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the CAN bus line (drivetrain CAN1, ITS CAN1, ITS CAN4)
  • Malfunction of the 8CH CAN gateway power supply circuit
  • Malfunction of the 8CH CAN gateway
  • Malfunction of the ADAS control unit 2 power supply circuit
  • Malfunction of the ADAS control unit 2
  • Malfunction of the PHEV-ECU
 
 
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 DTC
Check whether the PHEV-ECU sets the following DTC.
  • DTC No. U2152-87 Lost Communication With ADAS
Is the DTC set?
Troubleshoot the set DTC (Refer to DTC No. U2152-87 Lost Communication With ADAS).
 
2.Check whether the DTC is set again.
Is the DTC set?
Replace the ADAS control unit 2 (Refer to Driver Assistance System - ADAS Control Unit Removal and Installation), Then go to .
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).
 
3.Check whether the DTC is set again.
Is the DTC set?
Replace the PHEV-ECU (Refer to PHEV-ECU REMOVAL AND INSTALLATION).
The procedure is complete.