Signal Too High
Signal too high
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 component and wiring
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Checking the component and wiring
Check the cable between engine control module (ECM) terminal #A22 (#A22) and mass air flow (MAF) sensor terminal #3. Check for a short-circuit to supply voltage.
Remedy as necessary.
Other information
- Connecting the breakout box Connecting the Breakout Box
- Signal specification Signal Description / Specification
- Mass air flow (MAF) sensor, replacing Service and Repair
- 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.
- 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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