Fault Information

Fault Code Description
The receiving control unit logs the fault when an expected message from the transmitting control unit is not received. These types of faults are usually caused by interference on the bus connection between the affected control units (physical connection).

Fault Code Conditions
General Conditions	Supply voltage between 9 and 16 volts.
Terminal Condition	Terminal 15 On
Terminal Condition	PWF status: Driving
Terminal Condition	PWF status: Residing
Driving Conditions	Notice: The designations of terminal status or PWF status apply according to the vehicle electrical system.

Fault Time Condition
The fault is entered after starting the control unit after a maximum of 10 seconds.

Service Plan
Run the "System analysis message missing" test module.In this test module, all "Message missing" fault memory entries from all control units are analysed. This makes it possible to localise the fault to a specific area (most likely fault cause).In many cases, the faults only occur sporadically. To determine the precise fault cause, additional measurements based on the results of the analysis routine need to be carried out (voltage supply, short circuit, contact problems). If it proves impossible to identify a clear and unambiguous fault cause and the fault pattern continues to appear repeatedly (repeat repairs), then it may be necessary to replace the related wires, plug connections or the control unit. Caution: If the fault only appears sporadically (no repeat repair) and if no customer complaints concerning the problem have been received, then replacement of the related control unit is neither approved nor logical. Notice: These faults usually appear in large numbers. If only a single fault related to a missing message has been entered and no other faults related to the function of the control unit are present, then the fault can be ignored.

Service Plan

Run the "System analysis message missing" test module.In this test module, all "Message missing" fault memory entries from all control units are analysed. This makes it possible to localise the fault to a specific area (most likely fault cause).In many cases, the faults only occur sporadically. To determine the precise fault cause, additional measurements based on the results of the analysis routine need to be carried out (voltage supply, short circuit, contact problems).
If it proves impossible to identify a clear and unambiguous fault cause and the fault pattern continues to appear repeatedly (repeat repairs), then it may be necessary to replace the related wires, plug connections or the control unit.
Caution:
If the fault only appears sporadically (no repeat repair) and if no customer complaints concerning the problem have been received, then replacement of the related control unit is neither approved nor logical.
Notice:
These faults usually appear in large numbers. If only a single fault related to a missing message has been entered and no other faults related to the function of the control unit are present, then the fault can be ignored.

Fault Impact

Warnings
Warning Lights
Control Center Messages

Service Notes