Signal Too Low

Signal too low

Checking other diagnostic trouble codes (DTCs)




Note! The diagnostic trouble code (DTC) may be the result of defective acceleration and/or position sensors. If any diagnostic trouble code (DTC) is stored in the Suspension Module (SUM) for these sensors, these must be fault-traced first. Check that no diagnostic trouble code (DTC) is stored.

- Ignition on
- Read off diagnostic trouble codes (DTCs).
Any stored diagnostic trouble code (DTC) for the acceleration or position sensors must be remedied and erased first.





Has a diagnostic trouble code (DTC) been stored for any of the acceleration or position sensors?

Yes - No Fault Found

No - Checking components and wiring

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Checking components and wiring




- Ignition off.
Check the connectors for the Suspension Module (SUM) and the position sensor. Check for contact resistance and oxidation.
- Check the cable for power supply between control module terminal #A13 and the acceleration sensors for the front suspension terminal #1. Check for a short-circuit to ground
- Check the cable for power supply between control module terminal #A13 and the position sensors for the right rear suspension terminal #5. Check for a short-circuit to ground
- Check the cable for power supply between control module terminal #A13 and the acceleration sensors on the bodywork terminal #3. Check for a short-circuit to ground.

Hint: The sensors are usually supplied with 5 V from control module terminal #13 when the ignition is on. There is no power supply if a diagnostic trouble code (DTC) is stored. Click on the VCT2000 symbol to activate the power supply. This will make fault-tracing easier.

Try a new control module if no fault is found in the wiring.
Remedy as necessary.

Other information:
- To access or replace the front bodywork acceleration sensor, see Acceleration sensor bodywork front (Four-C), replacing Acceleration Sensor Bodywork Front (Four-C), Replacing
- To access or replace the rear bodywork acceleration sensor, see Acceleration sensor bodywork rear (Four-C), replacing Acceleration Sensor Bodywork Rear (Four-C), Replacing
- To access or replace the position sensor, see Position sensor suspension rear (Four-C), replacing Service and Repair
- For information about components, see Component specifications [1][2]Specifications
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Suspension Module (SUM)
- For information about signals, see Signal specification Signal Specification, Suspension Module (SUM)
- Checking wiring and terminals Checking Wiring And Terminals.










Continue - Verification

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Verification




Verification

Verification

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








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Click on the VCT2000 symbol to read off the present value of the power supply to the sensors. The value must be approximately 5 V





Is the value 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




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 - FAULT-TRACING FAILED

Attempt New Test - Checking other diagnostic trouble codes (DTCs)

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