Signal Missing
Signal missing
Checking the component and wiring
The diagnostic trouble code (DTC) indicates that the communication between the left-hand gas discharge lamp module (GDL) and the central electronic module (CEM) is interrupted. This may be due to a fault in the cable between the control modules or a defective communication device in one or both of the control modules.
Check the cable between the central electronic module (CEM) and the left-hand gas discharge lamp module (GDL). Check for an open-circuit. Check for a short-circuit to ground.
Take readings between:
- Central electronic module (CEM) connector terminal #G26 (#26) and left-hand gas discharge lamp module (GDL) terminal #A12.
Also check that the fuse for the headlamp is intact. Replace the fuse if necessary.
Other information
- Connecting the breakout box Connecting The Breakout Box, Central Electronic Module (CEM)
- Location of components Component Location, Central Electronic Module (CEM)
- Checking wiring and terminals Checking Wiring And Terminals
Was a fault detected?
Yes - Verification
No - Replacing the control module
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Replacing the control module
Try replacing the gas discharge lamp module (GDL), left.
Other information
Select Continue.
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
- Light switch in position 2.
Switch between high and 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
FAULT-TRACING FAILED - No Fault Found
Attempt New Test - Checking the component and wiring
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