Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSVOLVO2004S80 L6-2.9L TURBO VIN 91 B6294TREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSDDM/PDM CODES (DRIVER/PASSENGER DOOR MODULE)DDM/PDM-0031PERMANENT FAULTSIGNAL TOO LOW
2004 Volvo S80 L6-2.9L Turbo VIN 91 B6294T
Signal Too Low
2004 Volvo S80 L6-2.9L Turbo VIN 91 B6294TSECTION Signal Too Low
Signal too low. Permanent fault
Checking the connectors and components
- Check the connector for the door node and door mirror. Check for contact resistance and oxidation.
Remedy as necessary
- Reinstall the connectors, components etc.
- Ignition on.
Test the door mirror function by changing its position and reading off the end values registered by the door mirror potentiometer.
Hint: The end values for the door mirror potentiometer should be between approximately 1 V and 4 V.
Other information:
- To access the door mirror, see Door mirror, replacing Door Mirror, Replacing
- Checking wiring and terminals Checking Wiring And Terminals.
Does the door mirror potentiometer operate correctly?
Yes - Verification
No - Checking a faulty signal
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Checking a faulty signal
Check the cable between the control module #25A and the door mirror potentiometer terminal #1. Check for an open-circuit. Check for a short-circuit to ground.
DDM/PDM-0031 Door mirror potentiometer, signal too low
Check the cable between control module #9A and door mirror potentiometer #9. Check for a short-circuit to ground.
DDM/PDM-0033 Door mirror potentiometer, signal too low
Check the cable between control module #10A and door mirror potentiometer #10. Check for a short-circuit to ground.
Other information:
- For further information about signals and other values, see Signal specification Signal Specification, Driver Door Module (DDM) / Passenger Door Module (PDM)
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box
- 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.
- Ignition off
- Reconnect the components, connectors etc.
- Ignition on.
Check that the limit values for the door mirrors are between 1 and 4 V.
Is the response within its permitted range?
Yes - Verification completed
No - 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 - Exit Fault-Tracing
No - Attempt New Test
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Attempt New Test - Checking the connectors and components
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.