PISTON & ROD GP 2520652 - Caterpillar

Illustration 1 g01197249
Schematic for the Lift Lever Position SensorThis diagnostic code is recorded when the implement electronic control module (ECM) determines that the voltage for the lift lever position sensor is too high. The signal wire connects to connector contact J2-24 (wire H710-PK) of the ECM. The lift lever position sensor is a 500 Hz PWM sensor.The possible causes for this diagnostic code are listed:
The signal circuit is shorted to the +battery.
The signal circuit is open.
The ground circuit is open.
The sensor has failed.System Response:The machine response is listed:
The lift function will be disabled until the diagnostic code is cleared. Also, the lift lever must be recentered.Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear the diagnostic codes when the original diagnostic code is corrected. Note: Ensure that the diagnostic code is active.Test Step 1. CHECK FOR POWER AT THE SENSOR.
Do not disconnect the harness connector from the sensor.
Turn the key start switch and the disconnect switch to the ON position.
At the harness connector for the sensor, measure the voltage from contact 1 to contact 2. Use the 7X-1710 Multimeter Probes .Expected Result:The voltage is the system voltage.Results:
YES - The voltage is system voltage. Proceed to Test Step 2.
NO - The voltage is not system voltage. The + battery circuit in the machine harness has failed.Repair: Replace the machine harness or repair the machine harness. Stop.Test Step 2. CHECK FOR PROPER GROUND AT THE SENSOR.
The machine harness remains connected to the sensor.
Turn the key start switch and the disconnect switch to the OFF position.
At the harness connector for the sensor, measure the resistance from contact 2 to frame ground. Use the 7X-1710 Multimeter Probe .Expected Result:The resistance is less than 5 ohms.Results:
YES - The resistance is less than 5 ohms. The ground circuit is correct. Proceed to Test Step 3.
NO - The resistance is greater than 5 ohms. The ground circuit in the machine harness has failed.Repair: Replace the machine harness or repair the machine harness. Stop.Test Step 3. CHECK THE WIRING HARNESS OF THE POSITION SENSOR FOR AN OPEN CIRCUIT.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness