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 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
- Mass air flow (MAF) sensor Service and Repair





Continue - Verification

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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 signal from the mass air flow (MAF) sensor.
Check that the signal is between 0.5 - 4.5 V.









Is the signal within its permitted range?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - FAULT FOUND

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Fault-tracing information

FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the status

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