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 MANUALSVOLVO2007XC90 AWD V8-4.4L VIN 85 B8444SREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSPSM CODES (POWER SEAT MODULE)PSM-002CPERMANENT FAULTFAULTY SIGNAL
2007 Volvo XC90 AWD V8-4.4L VIN 85 B8444S
Faulty Signal
2007 Volvo XC90 AWD V8-4.4L VIN 85 B8444SSECTION Faulty Signal
Faulty signal. Permanent fault
Checking the control panel
Check if the signal from the control panel is received by the power seat module (PSM).
Read off the value.
Hint: When checking the control panel, check if the resistance between #6C and the terminal pin is 0 ohms.
Other information:
- To connect the breakout box, see Connecting the breakout box, power seat module (PSM) Connecting the Breakout Box, Power Seat Module (PSM)
- For information about signals, see Signal specification, Power seat module Signal Specification, Power Seat Module (PSM).
Does the value change?
Yes - FAULT FOUND
No - Replacing the control panel
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Replacing the control panel
Replace the control panel. See Side panel, replacing Front Seat, Driver's Seat, Front Seat.
Continue - Verification
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Verification
Hint: After carrying out the repair it is important to check that the fault is no longer present.
Read off the value.
Does the motor now operate as it should?
Yes - FAULT FOUND
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 control panel
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RENDER: 1.0x
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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.