Signal Missing

Signal missing

Function test




- Ignition on.

Hint: The inner antennas are connected to the same driver circuit in the keyless vehicle module (KVM).

Check the inner 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 - Exit fault-tracing

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Checking the wiring








- Ignition off
- Disconnect the battery negative lead.
Check the wiring for each antenna. Check for damage. Check for a short-circuit to supply voltage. Measure the resistance between one antenna terminal at a time and the power supply terminal for the keyless vehicle module (KVM). Measure all antennas. Twist and turn the connectors and cable harness to establish the source of the intermittent faults.
The resistance must be infinite.
Remedy as necessary.
Also measure the resistance across the antenna terminals in the connector. The resistance must be approximately 10-50 ohms.
The resistance must not be infinite.
If no faults are found in the wiring to an antenna which displayed a fault, replace the antenna.

Other information
- Connecting the breakout box Connecting the Breakout Box, Keyless Vehicle Module (KVM)
- Signal specification Signal Description, Keyless Vehicle Module (KVM)
- Antennas keyless vehicle module (KVM), replacing 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.
Check the function of the inner 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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