RENR5042-02 171 Troubleshooting Section Note: Wiggle the harnesses during the following measurements in order to reveal any intermittent short condition. i02290050 Throttle Position Sensor Circuit - Test D. Measure the resistance between the P1 terminal for the suspect switch and engine ground. SMCS Code: 1913-038 E. Activate the switch and measure the resistance again. System Operation Description: Expected Result: The throttle position sensor eliminates the mechanical throttle and governor linkages. The sensor that is installed depends on the engine’s configuration. One resistance measurement indicates an open circuit. The other resistance measurement is less than ten Ohms. Results:
OK – One resistance measurement indicates an open circuit. The other resistance measurement is less than ten Ohms. The switch is operating correctly. The wiring does not have a short circuit or an open circuit. Repair: Operate the engine and check the switch for proper operation. If the switch does not operate correctly, there may be a short circuit between the circuit for the suspect switch and another circuit. Carefully reinspect the components. Refer to Troubleshooting, “Electrical Inspectors - Inspect”. Locate the short circuit and make repairs. g01123466 Illustration 89 Electronic throttle position sensor STOP.
Not OK – Both resistance measurements indicate an open circuit or both resistance measurements are less than ten Ohms. There is a problem with the circuit for the switch. Repair: The problem could be in the switch, in the wiring, or in a connector. Carefully reinspect the components. Refer to Troubleshooting, “Electrical Inspectors - Inspect”. g01122049 Illustration 90 Throttle position sensor with a lever If the inspection does not identify the faulty component, replace the switch and test the switch again. If the problem is not resolved, repair the wiring or the connector. Replace parts, if necessary. Verify that the problem is resolved. STOP.