Signal Too High

Signal too high

Checking components and wiring
Check the cable that relates to the diagnostic trouble code (DTC). Check for a short-circuit to supply voltage.
Check between:
- Engine control module (ECM) #A50 (#A50) and ignition coil pin #2 (ECM-350C: ignition coil A, cylinder 1).
- Engine control module (ECM) #A31 (#A31) and ignition coil pin #2 (ECM-351C: ignition coil B, cylinder 2).
- Engine control module (ECM) #A51 (#A51) and ignition coil pin #2 (ECM-352C: ignition coil E, cylinder 3).
- Engine control module (ECM) #A30 (#A30) and ignition coil pin #2 (ECM-353C: ignition coil C, cylinder 4).
- Engine control module (ECM) #A52 (#A52) and ignition coil pin #2 (ECM-354C: ignition coil D, cylinder 5).
Remedy as necessary.

Other information
- Connecting the breakout box, B5254T2 Connecting the Test Box
- Signal specification Signal Specification
- Replacing ignition coils, B5254T2 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
- Reconnect connectors, reinstall components etc.
- Start the engine. Allow the engine to idle.
The engine must fire on all cylinders.





Is the engine idling evenly?

Yes - Verification completed

No - 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 - Exit Fault-Tracing

No - Attempt New Test

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Attempt New Test - Checking components and wiring

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