Fault Tracing

Fault tracing

Checking the status




- Start the engine.
Check whether the fault is permanent or intermittent by reading the signal of the air temperature sensor. Check that the value is feasible.
If the value is not feasible, the fault is permanent. If the value is feasible, the fault is intermittent and not currently active.





Continue - Checking components and wiring

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Checking components and wiring




- Ignition off
Check the mass air flow sensor connections for contact resistance and oxidation.
Read the air temperature by clicking the VCT2000 symbol.
Remedy as necessary.

Other information
- Connecting the breakout box, B6304T4 Connecting the Breakout Box, Engine Control Module (ECM)
- Signal specification, B6304T4 Signal Specification, Engine Control Module (ECM)
- Mass air flow (MAF) sensor, B6304T4 Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals













Continue - Verification

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Fault-tracing information

Attempt New Test - Checking components and wiring

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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 intake air temperature sensor's signal by clicking on the symbol for VCT2000.
Check that the signal is within its permitted range.





Is the signal within its permitted range?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - FAULT FOUND

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