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 L6-3.2L VIN 98 B6324SREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSREM CODES (REAR ELECTRONIC MODULE)REM-9F21SIGNAL TOO LOW
2007 Volvo XC90 AWD L6-3.2L VIN 98 B6324S
Signal Too Low
2007 Volvo XC90 AWD L6-3.2L VIN 98 B6324SSECTION Signal Too Low
Signal too low
Checking the wiring
- Ignition off
- Disconnect connectors D and F on the rear electronic module (REM).
Check the signal cable. Check for a short-circuit to ground.
For the S80 and S60
Take readings between:
- Rear electronic module (REM) terminal #D2 (#2) and terminal #2 on the connector for the left-hand cargo compartment lamp
- Rear electronic module (REM) terminal #D11 (#11) and terminal #2 on the connector for the right-hand cargo compartment lamp.
For the XC90
Take readings between:
- Rear electronic module (REM) terminal #F7 (#47) and terminal #2 on the connector for the cargo compartment lamp.
Remedy as necessary.
Other information
- Connecting the breakout box Connecting Breakout Box, Rear Electronic Module (REM)
- Signal specification Signal Specification, Rear Electronic Module (REM)
- 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
- Reinstall the connectors, components etc.
- Ignition on.
Activate the cargo compartment lighting.
Check that the cargo compartment lighting is activated
Is the cargo compartment lighting activated?
Yes - Troubleshooting procedure complete
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 wiring
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.