Faulty Signal

Faulty signal

Checking the status




- Ignition on.
Activate reading off the rear center seat belt buckle.
Check if the fault is permanent or intermittent.
Lock and unlock the rear center seat belt buckle.

Hint: The signal level in the rear center seat belt buckle must be approximately 5 volts when unlocked and approximately 0 volts when locked. If the signal level is between 1.3 volts and 2.6 volts, the sensor is defective.

The fault is permanent if the signal level does not change between unlocked and locked status.
If the signal level 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
Check central electronic module (CEM) connector F and the seat belt buckle connectors. Check for contact resistance. Check for oxidation. Check for damage. Check for loose connections. Also check the intermediate connector.
Check signal cable for an open-circuit and short-circuit to supply voltage.
Take readings between:
- Central electronic module (CEM) terminal #F2 (#2) and right rear seat belt buckle, connector terminal #2.
Remedy as 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













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 - 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 component and wiring

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