Fault-Tracing

Fault-tracing

Checking the intake system
Check the mass air flow (MAF) sensor connector. Check for contact resistance and oxidation.
Check the intake system for leakage. In particular, check the hoses and hose connectors between the mass air flow (MAF) sensor and the throttle unit. Check for leakage and damage.
Check the intake system for blockages (e.g. contaminants in the throttle).
Remedy as necessary.

Other information
- Air leaks in the intake system, checking Air Leaks in the Intake System, Checking
- Mass air flow (MAF) sensor, B5254T7 Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals





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 correction factor for mass air flow and note it
- Start the engine. Increase the engine speed (RPM) a couple of times.
Read off the correction factor for mass air flow and check that the adaptation value is approaching 1. A normal value for the mass air flow correction factor is 0.8-1.2.





Is the value correct?

Yes - Troubleshooting procedure complete

No - Fault-tracing information

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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 intake system

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