Faulty Signal

Faulty signal

Checking the status




- Start the engine.
Check that the engine is firing on all cylinders.






Continue - Checking the components and wiring

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Checking the components and wiring

Hint: If diagnostic trouble codes (DTCs) are stored for all ignition coils, the most probable fault cause is a faulty diagnostic lead or power supply cable for the ignition coils. If the diagnostic trouble code (DTC) is stored for an individual ignition coil, the most probable cause is a faulty signal lead or ignition coil.

Check the connector for the ignition coil. Check for contact resistance. Check for oxidation.
Check the diagnostic lead between engine control module (ECM) terminal #A12 (#A12) and terminal #2 for the ignition coil to which the diagnostic trouble code (DTC) relates. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Check for an open-circuit.
Check the power supply cable between the system relay and terminal #4 for the ignition coil to which the diagnostic trouble code (DTC) relates. Check for a short-circuit to ground. Check for an open-circuit.
Check the signal cable to which the diagnostic trouble code (DTC) relates. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Check for an open-circuit.
Check between:
- Engine control module (ECM) terminal #A58 (A58) and ignition coil terminal #1 (ECM-3300)
- Engine control module (ECM) terminal #A59 (A59) and ignition coil terminal #1 (ECM-3310)
- Engine control module (ECM) terminal #A60 (A60) and ignition coil terminal #1 (ECM-3320)
- Engine control module (ECM) terminal #A34 (A34) and ignition coil terminal #1 (ECM-3330)
- Engine control module (ECM) terminal #A35 (A35) and ignition coil terminal #1 (ECM-3340).
Remedy as necessary.

Other information
- Connecting the breakout box Connecting The Breakout Box, Engine Control Module (ECM)
- Signal specification Signal Specification, Engine Control Module (ECM)
- Ignition coil 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.
- Start the engine.
Check that the engine is firing on all cylinders.





Is the engine running on all cylinders?

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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