Faulty Signal

Faulty signal

Checking the status




- Ignition on.
Activate low beam.
Check if the fault is permanent or intermittent.
The low beam must light on activation.
The fault is permanent if the low beam does not activate.
If the low beam is activated, this is an indication that the fault was present previously but that it is not active at the moment, i.e. the fault is intermittent.





Continue - Checking the component and wiring

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Checking the component and wiring
Check the voltage on output #E37 (#37) on the Central electronic module (CEM). The voltage must be approximately 12 V when the low beam is activated.
Short-circuit to ground in the control signal cable if the low beam cannot be activated.
- Check the control signal cable. Check for a short-circuit to ground.
- Remedy as necessary.

Other information
- Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- Headlamp bulb Headlamp Bulb
- 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.
Click the VCT2000 symbol to activate and deactivate the low beam.
Check that the function is OK.





Is the function 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

Attempt New Test - Checking the component and wiring

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