Faulty Signal. Permanent Fault

Faulty signal. Permanent fault

Checking the connectors




- Ignition off
- Check the engine coolant temperature (ECT) sensor and engine control module (ECM) connectors for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault
- Remedy as necessary.

Other information
- To access the engine control module (ECM), see Engine control module (ECM), replacing Replacing Engine Control Module (ECM).













Was a fault detected?

Yes - Verification

No - Checking component

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Checking component
- Remove the thermostat and check it according to Checking / replacing the thermostat Check/Replacing Thermostat
- Replace the thermostat if there is any doubt about its function.

Was a fault found in the thermostat?

Yes - Verification

No - Replacing the engine coolant temperature (ECT) sensor

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Replacing the engine coolant temperature (ECT) sensor
- If the function of the thermostat is correct, try a new engine coolant temperature (ECT) sensor according to Replacing the engine coolant temperature (ECT) sensor Replacing Engine Coolant Temperature (ECT) Sensor.





Select Continue when the fault has been remedied.

Continue - Verification

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Verification




Verification

Verification

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




- Reinstall the components, reconnect the connectors etc.
- Start the engine.




- Click on the VCT2000 symbol to read off the engine coolant temperature (ECT)
- Check that the engine coolant temperature (ECT) increases normally and that the engine reaches operating temperature

Is the engine coolant temperature (ECT) correct?

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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Attempt New Test - Checking the connectors

FAULT-TRACING FAILED - No Fault Found

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