Signal Missing

Signal missing

Checking components and wiring




- Ignition off.
Check the connectors for the Suspension Module (SUM) and the acceleration sensor. Check for contact resistance and oxidation.

For diagnostic trouble code (DTC) SUM-0053, front left bodywork acceleration sensor:
- Check the signal cable between control module terminal #A10 and acceleration sensor terminal #1. Check for an open-circuit or a short-circuit to the power supply cable
- Check the ground lead between control module terminal #A19 and acceleration sensor terminal #2. Check for an open-circuit.

For diagnostic trouble code (DTC) SUM-0063, front right bodywork acceleration sensor:
- Check the signal cable between control module terminal #A22 and acceleration sensor terminal #1. Check for an open-circuit or a short-circuit to the power supply cable
- Check the ground lead between control module terminal #A19 and acceleration sensor terminal #2. Check for an open-circuit.

For diagnostic trouble code (DTC) SUM-0073, rear left bodywork acceleration sensor:
- Check the signal cable between control module terminal #A28 and acceleration sensor terminal #1. Check for an open-circuit or a short-circuit to the power supply cable
- Check the ground lead between control module terminal #A19 and acceleration sensor terminal #2. Check for an open-circuit.

Hint: Click on the VCT2000 symbol to check the signal from the acceleration sensors.

Try a new acceleration sensor 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
- 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 acceleration sensors. The value must be approximately 2 V
Rock the car. Check that the value changes.





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 components and wiring

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