Signal Too High. Intermittent Fault
Signal too high. 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 engine coolant temperature (ECT) sensor and engine control module (ECM) connectors for a loose connection according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check cable between engine coolant temperature (ECT) sensor terminal 1 and engine control module (ECM) #A31 for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults , and an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check cable between engine coolant temperature (ECT) sensor terminal 2 and control module #A18 for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Continue - Fault-tracing information
-------------------------------------------------
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
------------------------
Attempt New Test - Checking cables and terminals
-------------------------------------------------