Fault-Tracing

Fault-tracing

Checking the status




Check whether the fault is permanent or intermittent by reading off the signal from the engine coolant temperature (ECT) sensor.

Note! In order for the correct values to be shown, reading of the temperatures must take place at the moment of start.

- Start the engine.
Check that the engine temperature is reasonable.
The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.

Hint: Remove the engine temperature sensor, but leave the connector in place. Leave the engine hood open, then the engine temperature sensor shall show the same temperature as outdoor temperature.










Continue - Checking the component and wiring

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Checking the component and wiring








- Ignition off.
- Unplug the engine temperature sensor connectors.
- Check the connectors. Check for loose connections. Check for contact resistance. Check for oxidation.
Check the engine temperature sensor's resistance between #1 and #2 (against the sensor).
Remedy as necessary.

Other information
- Connecting the breakout box, B5244T5, B5254T2 Connecting the Breakout Box
- Signal specification Signal Description / Specification
- Component specifications Specifications
- Temperature sensor engine coolant, replacing 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
- Reconnect the connectors, reinstall components etc.
- Ignition on.
Read off the engine coolant temperature (ECT) sensor signal. Check that the signal is within its permitted range.





Is the value OK?

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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the status

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