Signal Too High. Intermittent Fault

Signal too high. Intermittent fault

Checking wiring
Check the engine control module (ECM) and engine coolant temperature (ECT) sensor connectors for contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults.
Check in particular for damage or loose terminal pins.
Check the signal cable between engine control module (ECM) terminal #47 and engine temperature (ECT) sensor terminal #1. Check for an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults. Check for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults. Remedy if necessary.
Check the ground lead between engine control module (ECM) terminal #73 and engine coolant temperature (ECT) sensor terminal #2. Check for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults. Remedy if necessary.
If no faults are found in the above fault-tracing, try a new engine coolant temperature (ECT) sensor. See Replacing the engine coolant temperature (ECT) sensor Replacing Engine Coolant Temperature (ECT) Sensor.

Other information
- To connect the breakout box, see Connecting the breakout box. EMS 2000 Connecting The Breakout Box. EMS 2000.













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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 wiring

FAULT FOUND - DONE

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