Signal Too Low - Permanent Fault

Signal too low. Permanent fault

Checking cables
Check the cable between engine control module (ECM) #B45 (#B55) and central electronic module #14B (#A34) for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and for open-circuits according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
Remedy as necessary

Other information:
- Connecting the breakout box/accessing the control module, see Connecting the breakout box, B5244T5, B5254T2 Connecting the Breakout Box.
- To connect the central electronic module breakout box, see Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM).
- For information about signals, see Signal specification Signal Specification, ECM.






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.
Read off the fuel pump input signal for the central electronic module (CEM) from the engine control module (ECM).
Start the engine and check that the fuel pump (FP) input signal to the central electronic module (CEM) changes status.





Does the status of the input signal change?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - Fault Found

PAPER - No 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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking cables

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