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 MANUALSVOLVO2003V70 2.4 L5-2.4L VIN 61 B5244SREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSECM CODES (ENGINE CONTROL MODULE)ECM-110AFAULTY SIGNAL
2003 Volvo V70 2.4 L5-2.4L VIN 61 B5244S
Faulty Signal
2003 Volvo V70 2.4 L5-2.4L VIN 61 B5244SSECTION Faulty Signal
Faulty signal
Checking components and wiring
Hint: The outside temperature sensor for the engine control module (ECM) is in the left-hand door mirror.
- Ignition on
- Read off the outside temperature in Volts. Check that it matches the value in the table. See Outer temperature sensor Outer Temperature Sensor
- Ignition off.
Check the engine control module (ECM) and outside temperature sensor connectors. Check for contact resistance and oxidation.
Remedy as necessary.
Other information:
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box
- For information about signals, see Signal specification Signal Description / Specification
- To access or replace the outside temperature sensor, see Outside temperature sensor door mirror, replacing Outside Temperature Sensor Door Mirror, Replacing
- To fault-trace the wiring and terminals, see Checking wiring and terminals Checking Wiring And Terminals.
Continue - Verification
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Verification
Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Read off the outside temperature in Volts. Check that it matches the value in the table. See Outer temperature sensor Outer Temperature Sensor.
Is the value within its permitted range?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFIED - Fault Found
VERIFICATION FAILED - Fault-tracing information
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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 components and wiring
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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.