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Home >> Isuzu >> 1987 >> Impulse Base, Standard, MSG4K >> Repair and Diagnosis >> Engine Performance >> System >> I-TEC Control System >> Diagnosis & Testing >> Test 9 - Knock Sensor (Code 66)

Test 9 - Knock Sensor (Code 66)

  1. Unplug ECU connectors at ECU, and at knock sensor. Check resistance across sensor. Resistance should be more than 1000 ohms. Replace sensor if resistance is different.
  2. If resistance is okay, check continuity of circuit as indicated in table. If resistance are incorrect, repair or replace harness.
TESTING KNOCK SENSOR CIRCUIT

Wire Color ECU Connector Terminal No. Resistance (Ohms)
White 37 0
Ground 37 Infinity
Black 28 0
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