Signal Too Low

Signal too low

Checking the power supply




- Ignition on.
Check the power supply cable from the ignition switch to connector terminal #1 on the immobilizer antenna unit. Check for an open-circuit. Check for loose connections. Check for contact resistance and oxidation.
Remedy as necessary.

Other information
- Antenna unit immobilizer, replacing Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals










Continue - Checking the signal cable

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Checking the signal cable




- Ignition off.
Check central electronic module (CEM) connector D and the connector for the immobilizer antenna unit. Check for contact resistance. Check for oxidation. Check for damaged or loose connections.
Check the signal cable. Check for an open-circuit. Check for a short-circuit to ground.
Take readings between:
- Central electronic module (CEM) connector terminal #D57 (#57) and immobilizer antenna unit terminal #2.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- Signal specification Pinout Values and Diagnostic Parameters
- Location of components Locations
- Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing
- Antenna unit immobilizer, replacing Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals










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.
- Try to start the vehicle.

Does the vehicle start?

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 power supply

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