Component Tests and General Diagnostics
Checking the headlamp washer
Fault-tracing information
The headlamp washer motors are supplied with power via a relay positioned in the integrated relay/fusebox in the engine compartment.
Reasons for the headlamp washers not working can include:
- Burnt out fuse
- Damaged relay
- The washer reservoir level is too low
- Open-circuit in the signal cable
- Defective washer motor.
- Headlamps off (Only applies to vehicles with Halogen lamps).
- Low voltage in the battery and engine not running (Only applies to vehicles with Bi-Xenon lamps).
Note! The headlamp washer is only activated every 5th time that the stalk for windshield washing/headlamp washing is activated. The counter for this activation is reset after 10 minutes.
Continue - Checking components
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Checking components
Check that the headlamp washer fuse is intact.
Check that the washer reservoir level is above 1 liter.
Hint: "Reading off parameters, digital display" under vehicle communication can be used to check that the windshield washer reservoir level is above one liter.
Checking the relay
Check that the headlamp washer relay is correctly installed.
Also check the relay terminal, in particular terminal #5. Check for a short-circuit to ground.
Check the function of the headlamp washer relay. Activate and deactivate the relay a number of times. The relay is functioning if there is a clicking sound when the relay is activated and deactivated.
Click the VCT2000 symbol to activate and deactivate the relay.
Remedy as necessary
Was a fault detected?
Yes - Verification
No - Checking the wiring
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Checking the wiring
Check the signal cable between the headlamp washer relay and the washer motor. Check for an open-circuit. Check for a short-circuit to ground.
Take readings between:
- The headlamp washer relay connector terminal #5 and washer motor connector terminal #1.
Remedy as necessary.
Other information
- Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- Control module relay box passenger compartment Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals
Was a fault detected?
Yes - Verification
No - Replacing the component
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Replacing the component
Replace the washer motor.
Other information
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 the headlamp washer.
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
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 - Fault-tracing information
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