Signal Too High

Signal too high

Checking the wiring
Check the cable between engine control module (ECM) terminal #A22 (#A22) and mass air flow (MAF) sensor terminal #5. Check for a short-circuit to supply voltage.
Check the ground lead between terminal #A58 (#A58) and mass air flow (MAF) sensor terminal #3. Check for an open-circuit.
With the ignition on and the mass air flow (MAF) sensor connector disconnected, the voltage at mass air flow (MAF) terminal #2 must be approximately Ubat, at mass air flow (MAF) terminal #3 it must be ground and at terminal #5 approximately 1 V.
Remedy as necessary

Other information:
- Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
- Connecting the breakout box, B5244T5, B5254T2 Connecting the Breakout Box
- For information about signals for 5 cylinder engines: Signal specification Signal Description / Specification
- For information about signals for 6 cylinder engines: Signal specification Signal Description / Specification










Continue - Verification

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Verification




Verification

Verification

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








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on
- Check that the air flow is correct. The value must be approximately 0 kg/h with the engine switched off
- Start the engine. Read off the air flow. The value may vary by between 12-20 kg/h at idle speed, depending on the engine load and temperature. The value may be in excess of 20 kg/h if the engine is cold
- Increase the engine speed (RPM) and check that the air flow increases with increased engine speed.









Are the values correct?

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 wiring

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