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 L5-2.4L VIN 64 B5244S6REPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSECM CODES (ENGINE CONTROL MODULE)ECM-2340FAULTY SIGNAL
2004 Volvo V70 L5-2.4L VIN 64 B5244S6
Faulty Signal
2004 Volvo V70 L5-2.4L VIN 64 B5244S6SECTION Faulty Signal
Faulty signal
Checking for intermittent faults
- Activate the relevant injector.
A click should be heard from the injector when it is activated.
Is the injector working?
Yes - Fault-tracing information
No - Checking the connector
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Checking the connector
- Ignition off.
Check the injector connector. Check for contact resistance and oxidation.
Remedy as necessary.
Other information
- To access or replace the injector, see Injector/pulse damper, replacement Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals.
Continue - Checking the connector
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Checking the connector
- Ignition off
- Reinstall the components, reconnect the connectors etc.
- Ignition on
- Activate the injector which caused the diagnostic trouble code (DTC) to be stored
- A click should be heard from the injector when it 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 Injector/pulse damper, replacement Service and Repair.
Is the injector working?
Yes - Fault Found
No - Checking injectors
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Checking injectors
Check the cable between injector terminal 2 and the control module:
- terminal #16 for ECM-2300
- terminal #34 for ECM-2310
- terminal #15 for ECM-2320
- terminal #33 for ECM-2330
- terminal #14 for ECM-2340.
Check for an open-circuit. Check for short-circuit to supply voltage. Check for a short-circuit to ground.
Check the resistance between terminals #1 and #2 on the injector. It should be 10-20 ohms at approximately 20°C.
Check the cable between injector connector terminal #1 and fuse 3 in the integrated relay / fusebox in the engine compartment. Check for an open-circuit.
Hint: With the ignition on, the voltage between injector terminal 1 and ground terminal must be battery voltage.
Remedy as necessary.
Other information
- Checking wiring and terminals Checking Wiring And Terminals.
Continue - Verification
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Fault-tracing information
The control module has previously registered a fault. The fault is now no longer present.
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 for intermittent faults
FAULT FOUND - DONE
DONE - DONE
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Verification
Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off.
- Reconnect connectors, reinstall components
- Ignition on.
- Activate the relevant injector.
A click should be heard from the injector when it 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 for intermittent faults
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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.