Faulty Communication

Faulty communication

Checking the component








- Switch off the ignition. Wait 10 seconds
- Disconnect the 10-pin connector from the occupant weight sensor (OWS)
- Disconnect connector A from the central electronic module (CEM).

Caution! Do not touch the terminal pins in the supplemental restraint system module (SRS), the central electronic module (CEM) and the occupant weight sensor (OWS). There is a risk of static discharge which could damage the control modules.

Check the connectors for the central electronic module (CEM) and the occupant weight sensor (OWS). Check for damage to pins and terminals in the connectors. Check for contact resistance.
Also check the other connectors that connect the power supply cable between the central electronic module (CEM) and the occupant weight sensor (OWS).
Remedy as necessary.
Check the power supply cable between the central electronic module (CEM) and the connector for the occupant weight sensor (OWS). Check for an open-circuit. Check the fuse.
Check the cable between:
- Central electronic module (CEM) terminal #A10 and the 10-pin connector for occupant weight sensor (OWS) terminal #2.
Remedy as necessary.
Check the ground connection for the occupant weight sensor (OWS). Check for an open-circuit. Check for contact resistance.
Check the cable between the 10-pin connector for the occupant weight sensor (OWS) terminal #9 and the ground terminal.
Remedy as necessary.
Disconnect the connector from the supplemental restraint system module (SRS). Check the communication cable (LIN-bus) between the supplemental restraint system module (SRS) and the 10-pin connector for the occupant weight sensor (OWS). Check for an open-circuit.
Check the cable between:
- Supplemental restraint system module (SRS) terminal #57 and the 10-pin connector for occupant weight sensor (OWS) terminal #10.
Remedy as necessary.
Replace the pressure sensor and the occupant weight sensor module (OWS) if no fault is detected. The pressure sensor and occupant weight sensor (OWS) module are included in the occupant weight sensor (OWS) system.

Note! After replacing the pressure sensor and the occupant weight sensor (OWS) module in the occupant weight sensor (OWS) system, the supplemental restraint system module (SRS) must be configured. This is done by storing the ID number for the occupant weight sensor (OWS).The occupant weight sensor (OWS) must also be calibrated.

Other information
- Connecting the breakout box Connecting the Breakout Box, Supplemental Restraint System Module (SRS)
- Signal specification Signal Specification, Supplemental Restraint System Module (SRS)
- For further information about cable routing and terminals, see the wiring diagram
- Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing
- Control module SRS (supplemental restraint system), replacing Service and Repair
- Occupant weight sensor (OWS), replacing Removal and Replacement
- Storing the ID number for the occupant weight sensor (OWS) Logging Detailed Diagnostics Data
- Calibrating the occupant weight sensor (OWS) Programming and Relearning
- Cable harness SRS system, repair Procedures
- Checking wiring and terminals Checking Wiring And Terminals





Select "Continue" when the fault has been remedied.

Continue - Verification

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Verification




Verification

Verification

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




- Ignition off
- Disconnect the battery negative lead
- Reinstall the connectors, components etc.
- Ignition on
- Connect the battery negative lead.

Warning! There must not be anyone inside the passenger compartment when the battery is connected.

- Read off diagnostic trouble codes (DTCs).
The fault is no longer present if the diagnostic trouble code (DTC) status is intermittent.





Is the diagnostic trouble code (DTC) intermittent?

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 - No Fault Found

Attempt New Test - Checking the component

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