Signal Too High

Signal too high

Checking the component and wiring
Check the intake air temperature (IAT) sensor between terminals #1 and #2 (sensor side). Check the resistance.

Hint: The intake air temperature (IAT) sensor is integrated in the boost pressure sensor.

Check the boost pressure sensor connector. Check for contact resistance and oxidation.
Check the signal cable between control module terminal #A87 (#B27) and boost pressure sensor terminal #2. Check for a short-circuit to supply voltage. Check for an open-circuit.
Remedy as necessary.

Other information
- Connecting the breakout box, B5254T7 Connecting the Breakout Box, Engine Control Module (ECM)
- Signal specification, B5254T7 Signal Specification
- Component specifications, B5254T7 [1][2]Engine Control Module
- Temperature and manifold absolute pressure sensor (MAPT), 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
- 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 - Exit fault-tracing

No - Attempt New Test

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Attempt New Test - Checking the component and wiring

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