Signal Missing

Signal missing

Checking the wiring








- Ignition off
- Disconnect central electronic module (CEM) connector D.
The Diagnostic Trouble Code (DTC) indicates that the communication between the Central Electronic Module (CEM) and cruise control switch is not working.
This may be due to a fault in the signal cable between the control modules or a damaged communication device in one or all of the control modules.
Check the connectors for loose connections, damaged or bent terminal pins and oxidation.
Check the signal cable. Check for an open-circuit. Check for a short-circuit to ground.
Take readings between:
- The Central Electronic Module (CEM) #D58 (#58) and cruise control switch #2.
Also check the intermediate connectors.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- Signal specification Signal Specification
- Location of components Locations
- Keypad unit, steering wheel, replacing Keypad, Steering Wheel
- Steering wheel module (SWM), replacing Steering Wheel Module (SWM), 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 cruise control switch.
Remedy as necessary.

Other information
- Keypad unit, steering wheel, replacing Keypad, Steering Wheel

Continue - Verification

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Verification




Verification

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








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Check that the function for the relevant button or switch is OK.

Is the function OK?

Yes - Verification completed

No - 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 - Exit Fault-Tracing

No - Attempt New Test

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Attempt New Test - Checking the wiring

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