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DTC No. U1D80-87: Mute diagnosis
DTC No. U1D81-87: Driving mode CAN Mute diagnosis
 
 
 
 
DTC SET CONDITION
Check Condition <DTC No. U1D80-87>
  • The power supply mode of the electric motor switch is ON.
Check Condition <DTC No. U1D81-87>
  • During the BMU operation
Judgment Criterion
  • The BMU2 cannot send the CAN signal.
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the BMU
 
 
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 of other DTC
Check whether the following DTC is set.
  • DTC No. U2A0D-88 Bus-Off Diagnosis
Is the DTC set?
Troubleshoot the set DTC (Refer to DIAGNOSTIC TROUBLE CODE CHART).
 
2.Check whether the DTC is set again.
Is the DTC set?
Disassemble the drive battery (Refer to SERVICE PROCEDURE). After the disassembly, replace the BMU (Refer to BATTERY MANAGEMENT UNIT (BMU) 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).