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, B5254T7 Connecting the Breakout Box, Engine Control Module (ECM)
- Signal specification, B5254T7 Signal Specification
- 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
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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