Communication Fault

Communication fault

Checking components and wiring








- Switch off the ignition. Wait 10 seconds
- Disconnect the connector from the front right-hand front impact sensor
- Disconnect the connectors from the supplemental restraint system module (SRS).

Caution! Do not touch the terminal pins in the supplemental restraint system module (SRS). There is a risk of static discharge. This could damage the supplemental restraint system module (SRS).

Check the connectors to the front impact sensor and the supplemental restraint system module (SRS). Check for damage to pins and terminals in the connectors. Check for contact resistance in the connectors. Also check the other connectors that connect the signal cable between the supplemental restraint system module (SRS) and the front impact sensor.
Remedy as necessary.
Check the cable between the supplemental restraint system module (SRS) and the front impact sensor connector. Check for an open-circuit.
Check the cable between:
- Supplemental restraint system module (SRS) terminal #B5 and front impact sensor connector terminal #1
- Supplemental restraint system module (SRS) terminal #B9 and front impact sensor connector terminal #2.
Remedy as necessary.
If no fault is found, replace the front impact sensor.

Other information
- Connecting the breakout box Connecting the Breakout Box, Supplemental Restraint System Module (SRS)
- Signal specification Signal Specification
- For further information about cable routing and terminals, see the wiring diagram
- To access or replace the supplemental restraint system module (SRS) and the connectors. See: Air bag supplemental restraint system Service and Repair
- To access or replace the front right-hand front impact sensor and the connectors, see: Collision sensor Collision Sensor
- For information about the repair of SRS wiring, see: Wiring harness supplemental restraint system (SRS) Wiring Harness Supplemental Restraint System (SRS)
- 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.




- Switch off the ignition. Wait 10 seconds
- Disconnect the battery negative lead
- Reinstall the connectors, components etc.
- Ignition on
- Connect the battery negative lead. Wait 10 seconds.

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

Read diagnostic trouble codes by clicking the VCT2000 symbol.
If the fault is intermittent, the fault has been remedied.





Is the fault 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

FAULT-TRACING FAILED - No Fault Found

Attempt New Test - Checking components and wiring

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