Here is the instruction show you guide on how to solve Scania truck Alarm system Wake-up signal short-circuit to ground.
Preparations:
Scania SDP3 2.60.1 Truck Diagnostic Software
Wake-up signal for Scania Communicator, short circuit
Error identification
Wake-up signal for Scania Communicator is short-circuited to ground.
Cause
Fault in harness-to-component connectors or cable harness for the wake-up signal for Scania Communicator.
Internal fault in ALM control unit E7.
Notes
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Symptom
The alarm system cannot initiate Scania Communicator.
Action
Disconnect the harness-to-component connector to ALM control unit pin A5.
Measure for short circuits throughout the cable harness.
If there are a number of harness-to-component connectors between the wake-up signal and the ALM control unit, disconnect them and measure in order to isolate the fault.
If the fault is not in the cable harness it is probably an internal fault in ALM control unit E7.
