VALVE AS- 3676983 - Caterpillar

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Engine view (typical example) (1) J1/P1 ECM connector
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Engine view (typical example) (2) P61 Customer connector
Thoroughly inspect connectors (1) and (2). Inspect the connections on each throttle position sensor. Refer to diagnostic functional tests Troubleshooting, "Electrical Connectors - Inspect".
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P1 terminals that are associated with the throttle position sensor (P1-66) Primary throttle position (P1-68) Secondary throttle position
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J61/P61 terminals that are associated with the throttle position sensor (10) Primary throttle position (4) Secondary throttle position
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the throttle position sensor.
Check the allen head screw on the customer connector and on each ECM connector for the proper torque. Refer to diagnostic functional tests Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
Check the harness and wiring for abrasions and for pinch points from each throttle position sensor to the ECM and from the throttle position sensor to the electrical power source.Expected Result: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.Results:
OK - The wiring and the connectors appear to be OK. Proceed to Test Step 3.
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.STOPTest Step 3. Check for Supply Voltage at the Throttle Position Sensor
Disconnect the harness connector from the suspect throttle position sensor.
Restore the electrical power to the ECM.
Measure the voltage between terminals A and B on the harness connector for the throttle position sensor.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.Results:
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 4.
Not OK - The supply voltage is incorrect.Repair: The configuration of the wiring between the battery and the throttle position sensor depends on the vessel's configuration. The problem could be in the wiring or in a connector. There may be a problem with the battery.Perform the necessary repairs. When you make repairs to the wiring for the TPS, follow the guidelines in Special Instruction, REHS1187, "Electronic Installation Guide". Verify that the problem is resolved.STOPTest Step 4. Check the Signal Wire for a Short Circuit
Remove the electrical power from the ECM.
Disconnect the P1 connector from every ECM on the vessel. Verify that the electrical connector for the suspect throttle position sensor is disconnected.Note: Be sure to wiggle the harnesses during the following measurements. Be sure to wiggle each harness near each connector.
Measure the resistance between terminal P1-66 and all of the other terminals in the P1 connector for the ECM that activated the -08 diagnostic code.Expected Result:Each resistance