Signal Too High

Signal too high

Checking the component and wiring
- Check the boost pressure sensor connector. Check for contact resistance and oxidation.
Check signal cable for an open-circuit and short-circuit to supply voltage.
Take readings between:
- Engine Control Module (ECM) #A86 (#B26) and boost pressure sensor #4.
Check the ground lead. Check for an open-circuit.
Take readings between:
- Engine Control Module (ECM) #A38 (#A38) and boost pressure sensor #1.

Hint: The diagnostic trouble code (DTC) may be caused by a damaged boost pressure sensor.

Remedy as necessary.

Other information:
- Connecting the breakout box Connecting The Breakout Box, Engine Control Module (ECM)
- Signal specification Signal Specification
- Temperature and manifold absolute pressure sensor (MAPT) 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 value from the boost pressure sensor and the atmospheric pressure sensor.
The signal from the atmospheric pressure sensor is used as a reference value in this test.
Check that the boost pressure sensor value is approximately the same as the atmospheric pressure sensor value.





Is the value correct?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - FAULT FOUND

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Fault-tracing information

FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the component and wiring

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