PLATE 3793930 - Caterpillar

Illustration 1 g01592511
Schematic of the Lift Linkage Position Sensor
This diagnostic code is recorded when the Implement ECM determines that the signal for the Lift Linkage Position Sensor has an open circuit. The Lift Linkage Position Sensor is a PWM sensor. The signal wire for the Lift Linkage Position Sensor connects to connector contact J2-32 (wire H710-PK(Pink)) of the ECM.The possible causes of this diagnostic code are listed:
A shorted harness
A failed sensor
An open circuit
The ECM has failed. This is unlikely.Note: Ensure that the diagnostic code is active and that the diagnostic code indicator is active.Note: The following procedure can create numerous related diagnostic codes. Reconnect all harnesses. Then, the related diagnostic codes will be shown as being NOT active. Complete the following procedure. Then, clear all of the related diagnostic codes.System Response:The machine response is listed:
The lift linkage will not work properly.
The tilt linkage will not work properly.
The active fault must be removed before the implement features will work properly.
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 A to contact B. Use the 7X-1710 Multimeter Probes. Expected Result:The voltage is the system voltage.Results:
OK - The voltage is system voltage. Proceed to Test Step 2.
NOT OK - 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.STOPTest Step 2. CHECK FOR PROPER GROUND AT THE SENSOR.
The 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 B to frame ground. Use the 7X-1710 Multimeter Probe. Expected Result:The resistance is less than 5 ohms.Results:
OK - The resistance is less than 5 ohms. The ground circuit is correct. Proceed to Test Step 3.
NOT OK - The resistance is greater than 5 ohms. The ground circuit in the harness has failed.Repair: Replace the harness or repair the harness.STOPTest 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 harness from the position sensor.
At the harness connector for the sensor, connect a jumper wire between contact B and contact C.
Disconnect harness connectors from the ECM.
At the harness connector for the ECM, measure the resistance between contact J2-32 (wire H710-PK(Pink)) and contact J1-70 (wire 299-BK(Black)). Expected Result:The resistance measurement is less than 5 ohms.Results:
YES - The resistance measurement is less than 5 ohms. Proceed to Test Step 4.
NO - The resistance is greater than 5 ohms. There is an open circuit in the harness.Repair: There is an open circuit in the harness. Repair the harness or replace the harness.STOPTest Step 4. CHECK THE WIRING HARNESS OF THE POSITION SENSOR FOR A SHORT TO THE +BATTERY CIRCUIT.
The key start switch remains in