Activated Too Long

Activated too long

Checking the status




- Ignition on.
Activate reading off the horn switch.
Check if the fault is permanent or intermittent.
Activate or deactivate the horn switch.
The status of the horn switch must change when the switch is activated or deactivated.
The fault is permanent if the horn switch status does not change.
If the horn switch status changes, 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 the central electronic module (CEM) connector terminal #C3. Check the horn switch connector. Check for contact resistance. Check for oxidation. Check for damage. Check for loose connections. Also check the intermediate connector.
Check signal cable for a short-circuit to ground.
Take readings between:
- Central electronic module (CEM) connector terminal #B26 and steering wheel module (SWM) connector terminal #A2
- Steering wheel module (SWM) connector terminal #B2 and horn switch.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- Signal specification Signal Description, Central Electronic Module (CEM)
- Control module relay box passenger compartment 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.
Activate reading off the status. Click the VCT2000 symbol.
Activate and deactivate the function.
Check that the function is OK.





Is the function OK?

Yes - Troubleshooting procedure complete

No - 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 - Checking the component and wiring

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