Signal Too High / Signal Missing

Signal too high / Signal missing

Checking the status
Check if the fault is permanent or intermittent by switching between high and low beam.
If the left xenon lamp does not switch between the high and low beam it means that the fault is permanent.
If the left xenon lamp switches between high and low beam it indicates that the fault was present previously but is no longer active, intermittent fault.

Välj Fortsätt.

Continue - Checking components and wiring

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Checking components and wiring

V70 and XC70
Check the cable between Central electronic module (CEM) #A2 and left light housing #C1 (10/1) for open circuit as well as short-circuiting to voltage.

Other vehicles.
Check the cable between the central electronic module (CEM) terminal #A2 and the left lamp housing terminal #5A (10/1). Check for an open-circuit. Check for a short-circuit to supply voltage.

Hint: The actuator motor is supplied with voltage via the parking lamp circuit. If the parking lamp does not function carry out the following checks:

Check the main fuse, passenger compartment fuse and relay for the parking lamps.
Check that the left parking lamp bulb is intact.

V70 and XC70
Check the cable between passenger compartment fuse and light housing #A3 as well as light housing #4A and ground connection for open circuit.

Other vehicles.
Check the cable between the passenger compartment fuse and lamp housing terminal #2A. Check the cable between lamp housing terminal #1A and the ground terminal. Check for an open-circuit.
Replace the lamp housing if no fault is found.

Other information:
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- To access or replace the lamp housing, see Headlamp/bulb, replacing Headlamp/Bulb, Replacing
- For information about signals, see Signal specification Pinout Values and Diagnostic Parameters
- For further information about the fuses and relays, see the Wiring Diagram
- Checking wiring and terminals Checking Wiring And Terminals.

Välj Fortsätt.

Continue - Verification

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Verification




Verification

Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Switch on the lighting and shift between high and low beam.

Do the xenon lamps switch between high and low beam?

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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking components and wiring

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