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 CHARTSECM CODES (ENGINE CONTROL MODULE)ECM-4024SIGNAL 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
Checking the wiring
Check the signal cable between engine control module (ECM) terminal #B7 (#B17) and leak diagnostic unit terminal #1. Check for a short-circuit to ground.
Try a new leak diagnostic unit if no fault is found during the above fault-tracing.
Remedy as necessary.
Other information:
- Checking wiring and terminals Checking Wiring And Terminals
- For resistance values, see Component specifications Specifications
- To connect the breakout box, see Connecting the breakout box, B5254T2 Connecting the Test Box
- For information about signals on 5 cylinder engines, see Signal specification Signal Specification
- For information about signals on 6 cylinder engines, see Signal specification Signal Specification
- To access or replace the leak diagnostic unit, see Leak diagnostic pump, replacing Service and Repair.
Continue - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
Fault-tracing is not followed by verification for this fault.
Hint: After the diagnostic trouble codes (DTCs) are erased, the function of the leak diagnostic unit can be checked by running a quick test of the fuel tank system in the vehicle communication socket. If there is a fault, the fault status will be "FAULT FOUND" on the leak diagnostic unit.
The information can be displayed again or fault-tracing this fault can be interrupted.
Do you want to view the information again?
Yes - Attempt New Test
No - Exit fault-tracing
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Attempt New Test - Checking the wiring
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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.