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-6000SIGNAL TOO HIGH
2004 Volvo V70 L5-2.4L VIN 64 B5244S6
Signal Too High
2004 Volvo V70 L5-2.4L VIN 64 B5244S6SECTION Signal Too High
Signal too high
Diagnostic trouble code (DTC) status ECM-6000Air conditioning (A/C) relay. Signal too high
Reading off Diagnostic trouble code (DTC) status ECM-6000:
Note! When reading off the diagnostic trouble code (DTC) status, other stored diagnostic trouble codes (DTCs) and their status will be listed.
- Read off diagnostic trouble code (DTC) status. Check the status of the relevant diagnostic trouble code (DTC).
Was the status of the relevant diagnostic trouble code (DTC) permanent?
Yes - Checking the wiring and component
No - Intermittent fault
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Intermittent fault
Signal too high. Intermittent fault
Checking cables
Check signal cable between control module #B44 (#B54) and air conditioning (A/C) relay #4 for an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Other information:
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box.
- To access/replace the control module, see the relevant service procedure.
- To access/replace the air conditioning (A/C) relay, see the relevant service procedure.
- For information about signals, see Signal specification Signal Description / Specification.
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 cables
FAULT FOUND - DONE
DONE - DONE
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DONE - DONE
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Checking the wiring and component
Check the signal cable between control module terminal #B44 (#B54) and air conditioning (A/C) relay terminal #4. Check for a short-circuit to supply voltage.
Remedy as necessary.
Other information:
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box
- To access or replace the control module for the S70 and V70 -2000, see
- To access or replace the control module for the S60, S80 and V70 2000-, see Engine control module (ECM), replacing Service and Repair
- For information about signals, see Signal specification Signal Description / Specification
- For further information about the fuses and relays, see the Wiring Diagram
- 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.
- Reconnect connectors, reinstall components
- Ignition on.
- Activate air conditioning (A/C) relay.
A click should be heard from the relay when it is activated.
Is the function OK?
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: Troubleshooting is complete for this DTC
NO: Repeat Procedure.
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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.