Communication Fault

Communication fault

Checking the wiring








- Ignition off
- Disconnect connector D on the rear electronic module (REM).
The diagnostic trouble code (DTC) is stored if there is no communication between the rear electronic module (REM) and the inclination sensor module (ISM). This may be due to a fault in the signal cable between the control modules or a defective communication device in one or all of the control modules.
Check the signal cable. Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.
Take readings between:
- Rear electronic module (REM) terminal #D26 (#26) and the inclination sensor module (ISM) terminal #2.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting Breakout Box, Rear Electronic Module (REM)
- Signal specification Signal Specification, Rear Electronic Module (REM)
- Tilt sensor alarm, replacing Tilt Sensor Alarm, Replacing
- Checking wiring and terminals Checking Wiring And Terminals





Was a fault detected?

Yes - Verification

No - Replacing the control module

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Replacing the control module
Try a new inclination sensor module (ISM).
Remedy as necessary.

Other information
- Tilt sensor alarm, replacing Tilt Sensor Alarm, Replacing


Continue - Verification

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Verification




Verification

Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Activate the alarm.
Check that the functions are OK.

Are the functions OK?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - Fault Found

VERIFICATION FAILED - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the wiring

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