W/Harness Inspection

Engine

Engine Control - P1114 Engine Coolant Temperature Sensor Circuit Intermittent Low Input - W/Harness Inspection

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?






Signal Circuit Inspection

1. Check voltage
(1) IG "OFF" and disconnect ECTS connector.
(2) IG "ON" and ENG "OFF"
(3) Measure voltage between terminal 3 of ECTS harness connector and chassis ground.

Specification : Approx. 5 V




(4) Is the measured voltage within specification?





2. Check short to ground in harness
(1) IG "OFF" and disconnect ECTS connector and PCM connector.
(2) Measure resistance between terminal 3 of ECTS harness connector and chassis ground.
(3) Measure resistance between terminals 1 and 3 of ECTS harness connector.

Specification : Infinite




(4) Is the measured resistance within specification?