Upper Limit

Upper limit

Checking fuel injection system
Check intake system for air leakage according to Check for air leaks in the intake system Air Leaks in the Intake System, Checking.

Hint: Air leakage in the intake system can occur through the canister purge (CP) valve, the secondary air solenoid valve and power brake booster.

Start the engine and idle it for 10 minutes.
Check the mass air flow (MAF) sensor by read off its correction factors. The value should be between 2 and 12

Note! There must not be any air leakage when this test is carried out.

Remedy as necessary.

Other information
- To replace mass air flow (MAF) sensor, see the relevant service procedure.





Continue - Verification

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Verification




Verification
Test drive the car according to the TRIP schedule, see Verifying repairs Verifying Repairs.
Do not turn off engine after test drive.
Connect the car to VIDA again.
Read off fuel trim status.
There should not be any faults when fuel trim is finished.





Was a fault detected?

Yes - VERIFICATION FAILED

No - VERIFIED

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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 fuel injection system

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