Scania fault code 687
Code 687 is used by 4 different Scania systems. Choose the control unit shown in your diagnostic tool:
TMS Transmission Management System
Unexpected cable harness for CAN bus detected
The GMS control unit indicates that the safety bus's cable harness is connected to the vehicle, but the software is not configured for this.
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CUV Visibility system
AVAS, the supply voltage outside the valid range
A yellow warning indication is displayed.
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BCI
Programmable switch
A programmable switch in BICT is defective.
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CMS
Information fault, feedback from automatic vehicle level control
Fault in feedback from the automatic vehicle level control.
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