Signal Too High

Signal too high

Checking the wiring and component




- Ignition off.
Check the intake air temperature (IAT) sensor resistance between terminals #1 and #2 on the boost pressure sensor.

Note! The intake air temperature (IAT) sensor is integrated in the boost pressure sensor.

Check the signal cable between engine control module (ECM) terminal #A5 (#A5) and boost pressure sensor terminal #2 for short circuit to ground.

Hint: With the ignition on and the boost pressure sensor connector unplugged, the voltage between terminal #2 and the grounding terminal should be 5 V, measured at the connector. Read off air temperature by clicking on the VCT2000 symbol.

If no errors are found and the fault is permanent, replace the intake air temperature (IAT) sensor.
Remedy as necessary.

Other information:
- Connecting the breakout box, B5244T5, B5254T2 Connecting the Breakout Box
- For information on signals, 5-cyl: Signal specification Signal Description / Specification
- For information on signals, 6-cyl: Signal specification Signal Description / Specification
- Temperature and pressure sensor, replacing Service and Repair
- For information on resistance values: Component specifications Specifications
- 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
- Reconnect the connectors, reinstall components etc.
- Ignition on
- Read off the intake air temperature (IAT).





Is the temperature 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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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 and component

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