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cable. Using digital voltmeter, backprobe terminal No. 19 (Green/White wire) and terminal No. 24 (Black or Green/Black wire) at Engine Control Unit (ECU) wiring harness connector. Check TPS output voltage. 2) If output voltage is .48-.52 volt, go to step 3). If output voltage is not .48-.52 volt, remove throttle body. Loosen TPS mounting screws and rotate TPS clockwise, or counterclockwise, until output voltage is within specification. Tighten TPS mounting screws. 3) Turn ignition off. Disconnect voltmeter from ECU harness connector. Adjust throttle cable. Disconnect negative battery cable for at least 10 seconds to clear diagnostic code. Reconnect negative battery cable. Operate engine at idle for about 5 minutes to ensure engine idles smoothly. Test No. 3 1) Turn ignition on for more than 15 seconds. DO NOT start engine. Turn ignition off. This should fully retract ISC plunger. 2) Ensure ISC plunger is fully retracted. Disconnect TPS harness connectors. Connect Test Harness (MD998474) between connectors. Connect digital voltmeter between Red and Blue wires of test harness. 3) Turn ignition on. DO NOT start engine. TPS voltage should be .48-.52 volt. If TPS voltage is .48-.52 volt, go to step 4). If TPS voltage is not .48-.52 volt, loosen TPS mounting screws and rotate TPS clockwise, or counterclockwise, until correct voltage is obtained. Tighten TPS mounting screws. 4) Turn ignition off. Disconnect voltmeter and remove test harness. Reconnect TPS harness connectors. Adjust throttle cable. Start engine and check idle speed. 5) Turn ignition off. Disconnect negative battery cable for at least 10 seconds to clear diagnostic trouble code. Reconnect negative battery cable. Operate engine at idle for about 5 minutes to ensure engine idles smoothly. Test No. 4 1) Loosen throttle cable. Disconnect electrical connector from TPS. Connect digital ohmmeter between Green/White and Green/Yellow wire terminals of TPS electrical connector (on TPS side of harness). 2) Insert .026" (.66 mm) feeler gauge between fixed Speed Adjusting Screw (SAS) and throttle lever. See Fig. 4. Loosen TPS mounting screws. Rotate TPS fully clockwise. Check for continuity between Green/White wire and Green/Yellow wire terminals of TPS electrical connector. 3) Rotate TPS counterclockwise until ohmmeter registers no continuity. Tighten TPS mounting screws and reconnect TPS electrical connector. 4) Using digital voltmeter, backprobe terminal No. 19 (Green/White wire) and terminal No. 24 (Black or Green/Black wire) at Engine Control Unit (ECU) wiring harness connector. Turn ignition on. DO NOT start engine. Check TPS output voltage. 5) If TPS output voltage is 0.4-1.0 volt, go to step 6). If TPS output voltage is not 0.4-1.0 volt, check TPS and wiring harness for damage or malfunction. Replace TPS or repair wiring harness if necessary and go to next step. 6) Remove feeler gauge. Turn ignition off. Disconnect voltmeter from ECU connector. Adjust throttle cable. Operate engine at idle for about 5 minutes to ensure engine idles smoothly and within specification. Test No. 5 1) Disconnect electrical connector from TPS. Connect digital ohmmeter between Yellow/Red wire and Black wire terminals of TPS. 2) Insert .026" (.66 mm) feeler gauge between fixed Speed |