Signal Too Low. Intermittent Fault

Signal too low. Intermittent fault

EFI-123 Engine coolant temperature (ECT) sensor, signal

Checking cables and terminals

Warning! Before fault-tracing, disconnect engine cooling fan (FC) relay connector A so that the engine cooling fan (FC) will not run. The diagnostic trouble code (DTC) EFI-514 Engine cooling fan (FC) low-speed, signal may be stored. After fault-tracing the connector must be re-connected.




- Check cable between engine coolant temperature (ECT) sensor terminal 1 and engine control module (ECM) #A31 for an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.

Continue - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Do you want to view the information again?

Yes - Attempt New Test

No - FAULT FOUND

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Attempt New Test - Checking cables and terminals

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