- Abnormal communication of transmission control unit caused by wire harness short circuit（for internal use only） -

主题编号
LI27.19-P-071292
版本
1
功能组
27.19 Transmission - electrical system
日期
06-08-2020
有效性
Model 253 with transmission 725
更改原因

投诉

During car driving, alarm message appears in the IC or transmission gear can’t be shifted，no engine re-start is available once after switching off engine.


原因

There is abnormal wear between the wire harness of transmission control unit and front propeller shaft, which causes the wire harness of control unit to be short circuited to ground.

It is possible to cause one or more fault codes as following list.

文件
名称
现象图片.pdf the picture of mentioned symptom

补救

Repair the wire harness and adjust the wire harness to correct positon.

If a worshop has any similar case(not limited to model GLC), please send an FYI type TIPS Case.

For any inquiries or advice,please contact BMBS_Central Technical Department_Drivetrain team_Engineer_Li Wei_010-8417 3285_wei.wl.li@daimler.com


症状
症状
Power transmission / Automatic transmission / Function / Electrical fault/Fault code

控制单元/故障代码
控制单元
故障代码
故障代码说明
N127 - Control unit 'Powertrain' (PTCU) (CPC_NG) (GLS (167),GLC (253),G (463),E (213),X 290 AMG,S (217),GLE (167),S (222),CLS (257),C (205),E (238)) U010188 Communication with control unit "Transmission" has a malfunction. Bus OFF
N73 - Electronic ignition lock (EZS) (EIS222) (GLC (253),S (217),S (222),C (205)) P1D0D01 The signal line to control unit "DIRECT SELECT" has a malfunction. There is a general electrical fault.
N127 - Control unit 'Powertrain' (PTCU) (CPC_NG) (GLS (167),GLC (253),G (463),E (213),X 290 AMG,S (217),GLE (167),S (222),CLS (257),C (205),E (238)) U010187 Communication with control unit "Transmission" has a malfunction. The message is missing.
N73 - Electronic ignition lock (EZS) (EIS222) (GLC (253),S (217),S (222),C (205)) U119887 Communication with the intelligent servo module (ISM) has a malfunction. The message is missing.
N127 - Control unit 'Powertrain' (PTCU) (CPC_NG) (GLS (167),GLC (253),G (463),E (213),X 290 AMG,S (217),GLE (167),S (222),CLS (257),C (205),E (238)) U010087 Communication with the control unit 'combustion engine' has a malfunction. The message is missing.
N3/10 - Motor electronics 'MED41' for combustion engine 'M260/M264' (ME) (GLS (167),GLC (253),G (463),E (213),GLE (167),S (222),CLS (257),C (205),E (238)) U002888 Communication with the drivetrain CAN bus has a malfunction. Bus OFF