Signal Too Low: Permanent Fault

Signal too low: Permanent fault

EFI-444 Accelerometer, signal

Checking the signal cable








- Ignition off.
- Disconnect accelerometer.
- Ignition on.








- Connect a voltmeter between accelerometer connector terminal 3 and ground.

The voltmeter should read approximately 5 V.

OK - Replacing component

Not OK - Checking for a short-circuit

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Replacing component
- Try a new accelerometer.





Continue - Verification

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Checking for a short-circuit








- Check cable between accelerometer terminal 3 and engine control module (ECM) #B32 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.





Continue - Verification

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Verification




Verification

Hint: After carrying out the repair, check that the fault has been remedied as follows:








- Ignition off.
- Accelerometer and, if necessary, air conditioning (A/C) pressure sensor and fuel tank pressure sensor connected.
- Start the engine and idle it.




- Select Volvo Scan Tool (ST) to read off the value of the from the accelerometer.

The value should be approximately 2.5 V.

OK - VERIFIED

Not OK - 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 - Exit fault-tracing

No - Attempt New Test

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Attempt New Test - Checking the signal cable

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