174 RENR5042-02 Troubleshooting Section Not OK – There is a problem with the wiring and/or the connectors. Repair: Repair the wiring and/or the connectors. Replace parts, if necessary. Ensure that all of the seals are properly connected. Verify that the repair eliminates the problem. STOP. Test Step 2. Check for Supply Voltage at the Throttle Position Sensor A. Disconnect the P403 connector. B. Turn the keyswitch to the ON position. The engine should be OFF. C. Measure the voltage between terminals P403-A and P403-B. Expected Result: The supply voltage is at least 11 VDC for a 12 volt system. The supply voltage is at least 22 VDC for a 24 volt system. g01122217 Illustration 96 Results:
J61 and P61 terminal that is associated with the throttle position OK – The supply voltage is at least 11 VDC for a 12 volt system. The supply voltage is at least 22 VDC for a 24 volt system. The supply voltage is reaching the sensor. Proceed to Test Step 3. (10) Throttle position C. Perform a 45 N (10 lb) pull test on each of the wires that are associated with the throttle position sensor. Not OK – The supply voltage is incorrect. D. Check the allen head screw on each ECM connector for the proper torque. Refer to Troubleshooting, “Electrical Connectors - Inspect” for the correct torque values. Repair:
The configuration of the wiring between the +Battery and the throttle position sensor depends on the engine’s configuration. The problem could be in the wiring or in a connector. There may be a problem with the battery. E. Check the allen head screw on the customer connector for the proper torque. Refer to Troubleshooting, “Electrical Connectors - Inspect” for the correct torque value. Perform the necessary repairs. Verify that the problem is resolved. F. Check the harness and wiring for abrasions and for pinch points from the throttle position sensor to the ECM and from the throttle position sensor to the battery. STOP. Test Step 3. Check the Signal Wire for a Short Circuit Expected Result:
A. Turn the keyswitch to the OFF position. All connectors, pins, and sockets are completely coupled and/or inserted, and the harness and wiring are free of corrosion, of abrasion or of pinch points. B. Disconnect the P1 connector. Note: Be sure to wiggle the harnesses during the following measurements. Be sure to wiggle each harness near each connector. Results: C. Measure the resistance between terminal P1-66 and all of the other terminals in the P1 connector. OK The wiring and the connectors are OK. Proceed to Test Step 2.