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DTC No. U1E74-83 RMCU Communication error with BMU2
 
 
 
 
DTC SET CONDITION
Check Condition
  • 1 second has passed after the REMCU is booted.
Judgment Criterion
  • The abnormal CAN signal from the BMU2 is received.
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the CAN bus line (noise interference)
  • Malfunction of the drive battery (malfunction of the BMU2)
  • Malfunction of the rear motor (malfunction of the REMCU)
 
 
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 power drive unit sets the following related DTC.
  • DTC No. U1E39-83 PDU Communication error with BMU2
Is the DTC set?
 
2.Check whether the DTC is set again.
Is the DTC set?
Replace the drive battery (Refer to DRIVE BATTERY 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).
 
3.Check whether the DTC is set again.
Is the DTC set?
Replace the rear motor assembly (Refer to MOTOR (ELECTRIC MOTOR UNIT) 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).