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-4000SIGNAL MISSING - INTERMITTENT FAULT
2004 Volvo V70 L5-2.5L Turbo VIN 59 B5254T2
Signal Missing - Intermittent Fault
2004 Volvo V70 L5-2.5L Turbo VIN 59 B5254T2SECTION Signal Missing - Intermittent Fault
Signal missing. Intermittent fault
Checking wiring and connectors
Check the evaporative emission system (EVAP) valve connector. Check for contact resistance and oxidation. Check for loose connections.
Check the signal cable between control module terminal #A9 (#A9) and evaporative emission system (EVAP) valve terminal 2. Check the power supply between system relay terminal 3 and evaporative emission system (EVAP) valve terminal 1. Check for an intermittent open-circuit.
Other information:
- To connect the breakout box / access the control module, see Connecting the breakout box, B5244T5, B5254T2 Connecting the Breakout Box
- For the location of components on 5 cylinder engines, see Location of components Locations
- For the location of components on 6 cylinder normally aspirated engines, see Location of components Locations
- For the location of components on 6 cylinder turbocharged engines, see Location of components Locations
- 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
- Checking wiring and terminals Checking Wiring And Terminals.
Continue - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).
Do you want to view the information again?
Yes - Attempt New Test
No - Fault Found
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Attempt New Test - Checking wiring and connectors
FAULT FOUND - DONE
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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.