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Home >> Isuzu >> 1987 >> Impulse Base, Standard, MSG4K >> Repair and Diagnosis >> Engine Performance >> System >> I-TEC Control System >> Diagnosis & Testing >> Test 3 - Coolant Temperature Sensor (Codes 14, 15 And 16) >> Sensor Testing

Sensor Testing

Disconnect sensor harnesses and measure the resistance across the coolant temperature sensor terminals. Compare sensor resistance to coolant temperature. Replace coolant temperature sensor if resistance does not meet specifications.

TESTING COOLANT TEMPERATURE SENSOR

Temperature Resistance (Ohms)
15 °F (-10 °C) 7000-12,000
50 °F (10 °C) 3000-5000
70 °F (21 °C) 2000-3000
125 °F (52 °C) 700-1000
175 °F (80 °C) 200-400