Knock Sensor

Disconnect knock sensor harness connector. Using an ohmmeter, measure knock sensor resistance between sensor terminal and engine block. Resistance should be 3300-4500 ohms. Connect DVOM between sensor terminal and ground. Set voltmeter to 2-volt AC scale. Start and idle engine. Tap on engine block near sensor. A signal should be indicated on voltmeter. If no signal is indicated, replace knock sensor. Also, see TIMING CONTROL SYSTEMS  under IGNITION SYSTEM. Also see Code 43 in appropriate G - TBI TESTS W/ CODES (for Throttle Body Injected models) and G - PFI TESTS W/ CODES (for Port Fuel Injected models) article in this section.