Flow Too High

Flow too high

Checking the component and wiring
Check the cable between engine control module (ECM) terminal #A63 (#B3) and mass air flow (MAF) sensor terminal #5. Check for a short-circuit to supply voltage.
Check the ground lead between engine control module (ECM) terminal #A62 (#B2) and mass air flow (MAF) sensor terminal #3. Check for an open-circuit.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting The Breakout Box, Engine Control Module (ECM)
- Signal specification Signal Specification, Engine Control Module (ECM)
- The air flow reading from the mass air flow (MAF) sensor must be 0 kg/h with the engine switched off and ignition on
- Mass air flow (MAF) sensor 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
- Reinstall the connectors, components etc.
- Ignition on
- Check that the value for 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 can vary between 12-20 kg/h at idle speed, depending on the engine temperature and load. The flow can be more than 20 kg/h for a cold engine
- Increase the engine speed (RPM). Check that the air flow increases with increased engine speed.





Is the value 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 - Exit Fault-Tracing

No - Attempt New Test

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Attempt New Test - Checking the component and wiring

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