Signal Too High

Signal too high

Checking the status




- Ignition on.
Read off the status of the waking signal for the engine control module (ECM).
Change the ignition key position from position I to II.
Check if the fault is permanent or intermittent.
The status of the wake-up signal for the engine control module (ECM) must change when changing the ignition key position.
If the status of the waking signal for the engine control module (ECM) does not change, the fault is permanent.
If the status of the waking signal for the engine control module (ECM) changes, this is an indication that the fault was present previously but that it is not active at the moment, i.e. the fault is intermittent.






Continue - Checking components and wiring

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Checking components and wiring




- Ignition off.
Check central electronic module (CEM) connector terminal C and engine control module (ECM) connector B. Check for contact resistance. Check for oxidation. Check for damage. Check for loose connections. Also check the intermediate connectors.
Check the signal cable. Check for an open-circuit.
Take readings between:
- Central electronic module (CEM) terminal #C15 (#15) and engine control module (ECM) terminal #B27.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- Signal specification Pinout Values and Diagnostic Parameters
- Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing
- Engine control module (ECM), replacing Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals






Continue - Verification

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Verification




Verification

Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Activate reading off the status. Click the VCT2000 symbol.
Activate and deactivate the function.
Check that the function is OK.





Is the function OK?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - Fault Found

VERIFICATION FAILED - Fault-tracing information

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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 components and wiring

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