Signal Too Low. Permanent Fault

Signal too low. Permanent fault

Checking terminals








- Ignition off
- Disconnect the ignition coil connector.
Check the ignition coil connector. Check for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.





Was a fault detected?

Yes - Verification

No - Checking the signal cable

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Checking the signal cable








- Disconnect the ignition coil connector
- Ignition on.
Connect a voltmeter between the ignition coil connector terminal 2 (engine control module (ECM) side) and ground.









The voltmeter must display battery voltage for 2 seconds immediately after the ignition is switched on.

OK - Checking the ignition coil

Not OK - Checking the ignition coil

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Checking the ignition coil
Connect an ohmmeter between the ignition coil terminals 1 and 2 (ignition coil side).









The ohmmeter should read approximately 0.5 ohms.

OK - Checking the ignition coil

Not OK - Checking the ignition coil

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Checking the ignition coil
Try a new ignition coil according to Ignition coil(s), replacement Service and Repair.

Continue - Verification

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Checking the ignition coil




- Ignition off.
Check the cable between ignition coil connector terminal 1 and engine control module (ECM) terminal #32 (ECM-38) or terminal #1 (ECM-3A). Check for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Check for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.













Continue - Verification

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Checking the ignition coil




- Ignition on.
Check the cable between ignition coil connector terminal 2 and system relay 2/14 base terminal 3. Check for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Remedy as necessary.









Continue - Verification

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Verification








- Reconnect the connectors, reinstall components etc.
- Ignition on
- Start the engine.

Is the engine running on all cylinders?

Yes - FAULT FOUND

No - No Fault Found 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 terminals

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