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Home >> Volvo >> 1992 >> 740 Turbo, AW71L >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Self-Diagnostics - Ignition System >> Fault Code Testing >> Code 1-4-3 (Knock Sensor Signal)
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Code 1-4-3 (Knock Sensor Signal)

Disconnect knock sensor connector and jumper terminals. Measure resistance between terminals No. 12 (Black wire) and No. 13 (Green wire). Resistance should be zero ohms. If resistance is okay, replace knock sensor. If resistance is too high, wiring is faulty.

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