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-2330SIGNAL MISSING - PERMANENT FAULT
2004 Volvo V70 L5-2.5L Turbo VIN 59 B5254T2
Signal Missing - Permanent Fault
2004 Volvo V70 L5-2.5L Turbo VIN 59 B5254T2SECTION Signal Missing - Permanent Fault
Signal missing. Permanent fault
Checking the connector
- Ignition off
- Check the injector connector. Check for contact resistance and oxidation
- Reinstall the components, reconnect the connectors etc.
- Ignition on
- Activate the injector.
A "click" should be heard when the injector is activated.
If the injector is now OK, the fault was caused by poor contact in the connector.
Other information
- To access or replace the injector, see Injectors/pulsation dampers, replacing Service and Repair
- For information about signals, see Signal specification Signal Description / Specification
- Checking wiring and terminals Checking Wiring And Terminals.
Is the injector working?
Yes - Fault Found
No - Checking components and wiring
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Checking components and wiring
Check the resistance of the injector between terminals 1 and 2.
Check the cable between injector terminal 2 and control module:
- terminal #A16 (#A16) (ECM 2310)
- terminal #A34 (#A34) (ECM 2320)
- terminal #A15 (#A15) (ECM 2330)
- terminal #A33(#A33) (ECM 2340)
- terminal #A14 (#A14) (ECM 2350).
Check the power supply between system relay terminal 3 and injector terminal 1. Check for an open-circuit.
Remedy as necessary.
Other information
- To connect the breakout box / access the control module, see Connecting the breakout box, B5244T5, B5254T2 Connecting the Breakout Box
- To access or replace the injector, see Injectors/pulsation dampers, replacing Service and Repair
- For resistance values, see Component specifications Specifications
- For information about signals, see Signal specification Signal Description / Specification.
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off.
- Reconnect connectors, reinstall components etc.
- Ignition on.
- Activate the relevant injector.
A "click" should be heard when the injector is activated.
Is the injector working?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFICATION FAILED - Fault-tracing information
VERIFIED - Fault Found
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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 - FAULT-TRACING FAILED
No - Attempt New Test
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FAULT-TRACING FAILED - FAULT-TRACING FAILED
Attempt New Test - Checking the connector
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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.