0202150 JOHNSON WASHER, Tilt handle

Illustration 1 g01072579
Schematic for PTO configuration "Remote Throttle"Test Step 1. Inspect the Electrical Connectors and the Wiring
Connect Caaterpillar Electronic Technician (ET) to the service tool connector. Verify that the parameter for the PTO configuration is programmed to the "Remote Throttle".
Thoroughly inspect ECM vehicle harness connector J1/P1, the firewall bulkhead connector and the connector for the remote accelerator position sensor. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the remote accelerator position sensor:
J1/P1-31
J1/P1-30
Check the allen head screws for each of the ECM connectors for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque value.
Check the harness and wiring for abrasion and for pinch points from the remote accelerator position sensor to the ECM.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 - Proceed to Test Step 2.
Not OK - Repair: Perform the following diagnostic procedure:Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled.Verify that the repair eliminates the problem.STOPTest Step 2. Check for Active Diagnostic Codes
Connect the Cat ET to the data link connector.
Turn the keyswitch to the ON position.
Monitor the active diagnostic code screen on Cat ET. Check and record active diagnostic codes.Note: When the ECM automatically calibrates new duty cycle values for the low idle throttle position and for the high idle throttle position the ECM assumes 22 percent duty cycle at low idle and 75 percent duty cycle at high idle. As a result, you may notice that the status of the "PTO Throttle Position" reaches 100 percent well before the PTO accelerator is fully depressed. This is normal. After some cycling of the accelerator pedal to the high idle position, the ECM will adjust the calibration automatically. The ECM will adjust the calibration automatically provided that the high idle stop position is within the 75 to 90 percent duty cycle range, and the low idle is in the 10 to 22 percent duty cycle range. During normal operation, you may notice that more movement of the PTO accelerator is required for the "PTO Throttle Position" to increase above 3 percent. You may also observe that the status reaches the 100 percent value prior to the limit of the high idle position. This is done in order to ensure that the accelerator reaches these two critical points for engine operation.Expected Result:Result 1 30-8 or 30-13 are active.Result 2 There are no active diagnostic codes that are related to the circuit for the accelerator position sensor at this time, but a problem is suspected with operation of the circuit for the PTO accelerator position sensor.Results:
Result 1 - Proceed to Test Step 3.
Result 2 - Proceed to Test Step 3.Test Step 3. Check the Supply Voltage for the Remote Accelerator Position Sensor
Turn the keyswitch to the ON position.
Measure the voltage at terminal "A" (+12 V) with reference to terminal "B" (sensor return) at the connector for the remote accelerator position sensor.Expected Result:The measured voltage is between 11.0 VDC and 13.5 VDC.Results:
OK - The voltage is OK. Proceed to Test Step 4.
Not OK - The vehicle wiring or the battery is causing the problem. Repair the wiring or the battery. Replace the wiring or the battery. Perform the repair that is necessary. Verify that the repair has fixed the problem.STOPTest Step 4. Check the Duty Cycle of the Remote Accelerator Pedal Position Sensor
Turn the keyswitch to the ON position.
Monitor the duty cycle of the PTO throttle sensor on Cat ET. Access the following display screen in order:
"Service"
"Calibrations"
"Monitor Throttle Position Sensor"Expected Result:The duty cycle is between 10 and 22 percent with the accelerator pedal assembly in the low idle position, and the duty cycle is between 75 and 90 percent with the accelerator pedal assembly in the high idle position.Results:
OK - The remote accelerator position sensor is operating correctly. Proceed to Test Step 5.
Not OK - The circuit for the remote accelerator position sensor is not operating correctly. Proceed to Test Step 6.Test Step 5. Check the Status of the Power Train Data Link on Cat ET
Start the engine. While the status of the PTO throttle position sensor is being monitored on Cat ET, depress the pedal for the PTO throttle and release the pedal. The throttle position status and the engine should respond to the change in the accelerator pedal position.
Go to the "System Troubleshooting Settings" section of the electronic service tool and turn off the power train data link.
While the status of the PTO throttle position sensor is being monitored on Cat ET, depress the accelerator pedal and release the accelerator pedal. Also depress the accelerator pedal and release the accelerator pedal while the engine response is being monitored.Expected Result:The status of the PTO throttle position sensor and the engine should respond to the change in the accelerator pedal position.Result 1 The PTO accelerator is functioning properly.Result 2 The throttle response is limited by a message on the power train data link.Results:
Result 1 - The remote accelerator position sensor is operating correctly. Continue troubleshooting until the original condition is resolved.STOP
Result 2 - If the engine responds with the power train data link in the OFF position, but not with the power train data link in the ON position, a component of the power train data link is causing the response problem of the remote accelerator position sensor. Send the truck to the vehicle manufacturer in order to repair the faulty component of the power train data link.STOPTest Step 6. Check the Duty Cycle of the Remote Accelerator Position Sensor at the SensorNote: Performing certain steps within this procedure requires the use of a multimeter that is capable of measuring a PWM duty cycle.
Turn the keyswitch to the OFF position.
Remove the signal wire for the remote accelerator