Scania fault code 691
Code 691 is used by 7 different Scania systems. Choose the control unit shown in your diagnostic tool:
TMS Transmission Management System
No CAN message from the EEC control unit
The control unit generates an interrupt message, it is not receiving engine information.
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COO Coordinator
Communication with the ACS control unit
The communication between the coordinator and the ACS control unit has been interrupted.
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ELC Electronically controlled air suspension
Control valve for tag axle or rearmost rear axle.
The voltage on the output to the solenoid valve has been too high.
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CUV Visibility system
Vehicle turn alarm right front, high electric power consumption on pin
Electric power consumption is too high in vehicle turn alarm, right front.
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BCI
Break switch, sliding fifth wheel
Short circuit to ground in break switch 1.
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CMS
Information fault, load status
Incorrect information relating to load status.
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LDW Lane Departure Warning
Yellow light-emitting diode
Voltage too high on output to the yellow light emitting diode.
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