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 MANUALSVOLVO2004V70 L5-2.5L TURBO VIN 59 B5254T2REPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSECM CODES (ENGINE CONTROL MODULE)ECM-4024SIGNAL MISSING
2004 Volvo V70 L5-2.5L Turbo VIN 59 B5254T2
Signal Missing
2004 Volvo V70 L5-2.5L Turbo VIN 59 B5254T2SECTION Signal Missing
Signal missing
Checking components and wiring
Check the leak diagnostic unit connectors. Check for contact resistance and oxidation.
Check the resistance of the pump motor between the leak diagnostic unit connector terminals #1 and #4 (leak diagnostic pump side).
Check the signal cable between engine control module (ECM) terminal #B7 (#B17) and leak diagnostic pump terminal #1. Check for an open-circuit.
Check the power supply cable between system relay terminal #5 and leak diagnostic unit terminal #4. Check for an open-circuit.
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, B5244T5, B5254T2 Connecting the Breakout Box
- For information about signals on 5 cylinder engines, see Signal specification Signal Description / Specification
- For information about signals on 6 cylinder engines, see Signal specification Signal Description / 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 - Fault Found
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Attempt New Test - Checking components and wiring
FAULT FOUND - Fault Found
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RENDER: 1.0x
NO RELATED
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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.