Faulty Signal

Faulty signal

Checking the status




- Start the engine.
Check whether the fault is permanent or intermittent by reading off the signal from the mass air flow (MAF) sensor.
Check that the signal is between 0.5 - 4.5 V.
The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.










Continue - Checking the connector

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Checking the connector
Check the connector and terminals for the mass air flow (MAF) sensor. Check for contact resistance. Check for oxidation.
Remedy as necessary.

Other information
- Mass air flow (MAF) sensor, replacing Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals














Continue - Checking the intake system

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Checking the intake system
Check the intake system for leaks and damage.
Check the intake system for blockages (e.g. contaminants in the throttle).
Remedy as necessary.

Other information
- Air leakage in the intake system, checking Air Leaks in the Intake System, Checking
- Mass air flow (MAF) sensor, replacing Service and Repair






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.
- Start the engine and let it idle.
- Read off the mass air flow (MAF) sensor signal.
The mass air flow (MAF) sensor signal should be approximately 1.5-1.8V at idling speed.





Is the mass air flow (MAF) sensor signal 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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the status

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