Current Too Low

Current too low

Checking the component and wiring




- Ignition off.
Check the connectors for the Suspension Module (SUM) and the solenoids. Check for contact resistance and oxidation.
Check that the solenoids on the spring struts are correctly installed.

For diagnostic trouble code (DTC) SUM-0115, front left solenoid:
- Check the signal cable between control module terminal #A7 and solenoid terminal #2. Check for a short-circuit to ground. Check for an open-circuit
- Check the power supply cable between control module terminal #A6 and solenoid terminal #1. Check for an open-circuit.

For diagnostic trouble code (DTC) SUM-0125, front right solenoid:
- Check the signal cable between control module terminal #A8 and solenoid terminal #2. Check for a short-circuit to ground. Check for an open-circuit
- Check the power supply cable between control module terminal #A9 and solenoid terminal #1. Check for an open-circuit.

For diagnostic trouble code (DTC) SUM-0135, rear left solenoid:
- Check the signal cable between control module terminal #A1 and solenoid terminal #2. Check for a short-circuit to ground. Check for an open-circuit
- Check the power supply cable between control module terminal #A2 and solenoid terminal #1. Check for an open-circuit.

For diagnostic trouble code (DTC) SUM-0145, rear right solenoid:
- Check the signal cable between control module terminal #A4 and solenoid terminal #2. Check for a short-circuit to ground. Check for an open-circuit
- Check the power supply cable between control module terminal #A5 and solenoid terminal #1. Check for an open-circuit.

Hint: Click on the VCT2000 symbol to activate the power supply to the solenoids. This will make fault-tracing easier. Measure the current on the signal cable. The value must be approximately 0.5 A.

Check the resistance of the solenoids.
Remedy as necessary.

Other information:
- For information about component specifications, 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)
- To replace the front solenoid/shock absorber, see Shock absorber front, replacing, M58, M66 AWD, AW50/51 AWD Shock Absorber Front, Replacing
- To replace the rear solenoid/shock absorber, see Spring/shock absorber rear, replacing Spring/Shock Absorber Rear, Replacing
- Checking wiring and terminals Checking Wiring And Terminals.










Continue - Verification

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Verification




Verification

Verification

Warning! Always test drive cars under safe, controlled conditions. Follow the appropriate traffic and speed regulations.

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








- Ignition off
- Reinstall the connectors, components etc.
- Test drive the car. The driving mode must be changed during the test drive
- Ignition on
- Click on the VCT2000 symbol to read off the present value on the signal cable from the solenoids. The value must be approximately 0.5 A.









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 the component and wiring

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