Test TC-83A - Knock Sensor No. 2 Circuit

NOTE: For connector terminal idnetification, see CONNECTOR IDENTIFICATION DIRECTORY table. For wiring diagram, see WIRING DIAGRAMS article.

Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Disconnect knock sensor connector. Using scan tool in ohmmeter mode, check resistance on PCM connector terminal No. 25 knock sensor No. 2 signal circuit (Gray/Black wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground on Gray/Black wire. Perform TEST VER-2A .
Turn ignition on with engine off. Using scan tool in voltmeter mode, check voltage on PCM connector terminal No. 25 knock sensor No. 2 signal circuit (Gray/Black wire). If voltage is 5 volts or less, go to next step. If voltage is more than 5 volts, repair short to voltage on Gray/Black wire. Perform TEST VER-2A .
Turn ignition off. Remove intake manifold. Trace and inspect Gray/Black wire. If Gray/Black wire is damaged, repair as necessary. Perform TEST VER-2A . If Gray/Black wire is not damaged, go to next step.
Reconnect knock sensor connector. Using an external ohmmeter, check resistance of knock sensor No. 2 signal circuit Gray/Black wire between knock sensor connector and PCM connector terminal No. 25. If resistance is less than 5 ohms, replace knock sensor No. 2. Perform TEST VER-2A . If resistance is 5 ohms or more, repair open Gray/Black wire. Perform TEST VER-2A .