Signal Missing

Signal missing

Function test




- Ignition on.
Check the left-hand antenna circuit by clicking on the VCT2000 symbol.









Was the function OK?

Yes - Fault-tracing information

No - Checking the wiring

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Fault-tracing information
The keyless vehicle module (KVM) has previously registered a fault but the fault no longer exists. The diagnostic trouble code (DTC) was probably caused by an intermittent fault. If the fault persists, fault-tracing according to this diagnostic trouble code (DTC) must be carried out despite no fault symptoms being found. The fault is evaluated depending on how it occurs.
You can choose to view the information again or exit the fault-tracing.

Do you want to view the information again?

Yes - Function test

No - No Fault Found

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Checking the wiring








- Ignition off
- Disconnect the battery negative lead.
Check the connection to the control module and the connection to the antenna for bad contact and oxidation.
To check an antenna, measure the resistance between both the antenna terminals. A normal value is between 10-50ohms depending on the length of the wiring to the antenna if the reading occurs at keyless vehicle module (KVM). The value must not be 0 ohms or infinite.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting the Breakout Box, Keyless Vehicle Module (KVM)
- Signal specification Signal Description, Keyless Vehicle Module (KVM)
- Handle outer door front Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals





Was a fault detected?

No - Replacing the control module

Yes - Verification

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Replacing the control module
The fault is probably an internal fault in the keyless vehicle module (KVM) as no other faults were detected. The module should be replaced in this case.

Other information
- Keyless vehicle module (KVM) Service and Repair





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.
Check the function of the outer left-hand antenna circuit by clicking on the VCT2000 symbol. The keyless vehicle module (KVM) checks the antennas and wiring.
The result should be OK.





Is the check OK?

Yes - Troubleshooting procedure complete

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 - Function test

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