Signal Too Low

Signal too low

Checking the component and wiring
Check the terminal on the infotainment control module (ICM). Check for contact resistance and oxidation. Check for damage.
Check the fuse for the infotainment control module (ICM).
Check the power supply cable between central electronic module (CEM) C1/21 and infotainment control module (ICM) terminal #1 (#A1). Check for an open-circuit. Check for a short-circuit to ground.

Hint: A diagnostic trouble code (DTC) is stored in the central electronic module (CEM) if there is a fault in the control of the infotainment relay.

Check the ground lead between infotainment control module (ICM) terminal #3 (#A3) and the ground terminal. Check for an open-circuit. Check for a short-circuit to supply voltage. Also check the ground terminal. Check for contact resistance and oxidation.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting the Breakout Box, Infotainment Control Module (ICM)
- Signal specification Pinout Values and Diagnostic Parameters
- For further information about the fuses and relays, see the Wiring Diagram
- Information and Entertainment Display Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals









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.
Read off the power supply to the infotainment control module (ICM) by clicking on the VCT2000 symbol.
Check that the voltage is approximately battery voltage.





Is the voltage 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 - Exit fault-tracing

No - Attempt New Test

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Attempt New Test - Checking the component and wiring

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