Faulty Signal

Faulty signal

Checking the status




- Ignition on.
Activate headlamp wash / wipe.
Check if the fault is permanent or intermittent.
The headlamp wash / wipe relay clicks when it is activated.
The fault is permanent if the headlamp wash / wipe does not activate.
If the headlamp wash / wipe 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




- Ignition off.
Check that relay 2/182 is correctly installed.
Also check the relay terminal, in particular 2/182 terminal #2. Check for an open-circuit. Check for a short-circuit to ground.
It is not possible to deactivate headlamp wash / wipe if there is a short-circuit to ground in terminal 2/182#2.

Hint: The fault may have been caused by an open-circuit in the supply to the relay. The voltage must be 12 V at both terminals #1 and #5 for the relay. Also check the fuse for the tailgate wiper.

Remedy as necessary.

Other information
- Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- For further information about the fuses and relays, see the Wiring Diagram
- To replace the relay, see: Cable, battery to generator, B5254T7 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.
Click the VCT2000 symbol to activate and deactivate the relay.
A click should be heard from the relay.
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 status

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