Signal Too High

Signal too high

Checking the status




- Start the engine.
Read off the diagnostic status and fault status for the diagnostic trouble code (DTC) by selecting the relevant diagnostic trouble code (DTC) from the list.
Increase the engine speed to 2500 rpm until the diagnostic is "Complete".
Check whether the fault is permanent or intermittent. Read off the diagnostic trouble code (DTC) fault status when the diagnostic status is "Completed".

Hint: In some cases several functions of the component will be diagnosed. This affects the amount of time taken to run the diagnostic.

The fault is permanent if the fault status is "Fault found". If the fault status is "No fault found" the fault is intermittent and not presently active.









Continue - Checking components and wiring

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Checking components and wiring
- Check the connector for the camshaft position (CMP) sensor. 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) #A59 (#A59) and camshaft sensor #3.
Check the ground lead. Check for an open-circuit.
Take readings between:
- Engine Control Module (ECM) #A37 (#A37) and mass air flow sensor #2.
Check the power cable for a short-circuit to ground.
Take readings between:
- Engine Control Module (ECM) #A17 (#A17) and mass air flow sensor #1.
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
- Reconnect the connectors, reinstall components etc.
- Start the engine.
Read off the diagnostic status and fault status for the diagnostic trouble code (DTC) by selecting the relevant diagnostic trouble code (DTC) from the list.
Increase the engine speed to 2500 rpm until the diagnostic is "Complete".
Check the fault status for the diagnostic trouble code (DTC) when the diagnostic is "Complete". If the function is correct, the fault status must be "No fault found" when the diagnostic is complete.





Is the function OK?

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 status

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