ROD AS 4610627 - Caterpillar

replace the analog throttle position sensor.STOPTest Step 4. Check the Throttle Selection Status with the Electronic Service Tool
Check the status of the throttle selection switch (if equipped). Use the electronic service tool in order to check the status of the throttle selection switch.Expected Result:If the status of the throttle selection switch is shown in the OFF position, then the throttle 1 has control of the engine speed.If the throttle selection switch status is shown in the ON position, then the throttle 2 has control of the engine speed.The throttle may be overridden by using the SAE J1939 (CAN) data link or a PTO control.Results:
OK - The throttle selection switch is operating correctly.Repair: There may be an intermittent fault. Refer to Troubleshooting, "Electrical Connectors - Inspect".STOP
Not OK - The wrong throttle is selected. Change to the other throttle. There may be a fault with the selector switch input.Repair: Check the connections between the throttle selection switch and the P1 connector. Refer to Troubleshooting, "Electrical Connectors - Inspect".STOPTest Step 5. Check the Sensor Supply Voltage
Turn the keyswitch to the OFF position.
Disconnect the connector for the suspect throttle position sensor.
Turn the keyswitch to the ON position.
Measure the voltage between the 5 VDC terminal and the ground terminal on the harness connector for the sensor.Expected Result:The supply voltage should be between 4.84 VDC and 5.16 VDC.Results:
OK - The supply voltage is reaching the sensor. Proceed to Test Step 6.
Not OK - The supply voltage is not reaching the sensor.Repair: The fault is in the 5 VDC supply wire or the ground wire between the suspect throttle position sensor and the P1 connector.Repair the faulty wiring or replace the faulty wiring.Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.STOPTest Step 6. Verify the Type of Active Diagnostic Code
Turn the keyswitch to the ON position. Wait at least 10 seconds for activation of the diagnostic codes.
Use the electronic service tool to check for active diagnostic codes. Record all active diagnostic codes.Expected Result:One of the diagnostic codes that are listed in table 1 is active.Results:
Open Circuit - An XX-3 diagnostic code is active. Proceed to Test Step 7.
Short Circuit - An XX-4 diagnostic code is active. Proceed to Test Step 9.
There are no active diagnostic codes for the throttle position sensors. - The fault may be intermittent.Repair: Refer to Troubleshooting, "Electrical Connectors - Inspect".STOPTest Step 7. Create a Short Circuit at the Sensor Connector
Turn the keyswitch to the OFF position.
Disconnect the throttle position sensor with the XX-3 diagnostic code.
Fabricate a jumper wire. Install the jumper wire between the sensor signal terminal and the ground terminal on the harness connector for the throttle position sensor.
Turn the keyswitch to the ON position.
Access the "Active Diagnostic Codes" screen on the electronic service tool. Look for an active XX-4 diagnostic code for the suspect sensor.
Turn the keyswitch to the OFF position.
Remove the jumper wire.Results:
An XX-3 diagnostic code was active before the jumper was installed. An XX-4 diagnostic code is