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Home >> Isuzu >> 1987 >> Impulse Base, Standard, MSG5K >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> I-TEC Control System >> Diagnosis & Testing >> Test 3 - Coolant Temperature Sensor (Codes 14, 15 And 16) >> Circuit Testing
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Circuit Testing

Reconnect harness to coolant temperature sensor. Unplug ECU connectors at ECU. Check continuity of circuit as indicated in table. If resistance are incorrect, repair or replace harness.

TESTING COOLANT TEMPERATURE SENSOR CIRCUIT

Trouble Code ECU Connector Terminal No.; Test Pointt Resistance (Ohms)
14 8; B Infinity
14 8; Ground Infinity
15 or 16 8; GY 0
15 or 16 6; B 0
15 or 16 6; Ground Infinity
Fig 1: Test Chart 3
G87003