Test Description

WARNING: This page is about a different car, the 2002 Isuzu Trooper. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers in the diagnostic procedures.

2

Comparing engine coolant temperature display on scan tool with actual coolant temperature, as measured with a thermostat. See ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE table. If displayed engine coolant temperature is not close to actual temperature, replace ECT sensor. If engine coolant temperature is close to actual, check for intermittent problem. See DIAGNOSTIC AIDS .

ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE

Temperature °F (°C)	Ohms
-40 (-40)	100,700
-22 (-30)	52,700
5 (-15)	21,450
23 (-5)	12,300
41 (5)	7280
59 (15)	4450
77 (25)	2796
95 (35)	1802
113 (45)	1188
140 (60)	667
176 (80)	332
212 (100)	177