LINE AS 0358181 - Caterpillar

Illustration 1 g02551165
Schematic of the Lift Linkage Position Sensor
This diagnostic code is recorded when the ECM reads the input signal from the Lift Linkage Position Sensor and the PWM duty cycle is above normal.The sensor is a PWM sensor that operates at a frequency of approximately 500Hz 100Hz. The sensor sends a PWM input signal to the ECM. The duty cycle of the signal will vary from 3.5% to 96.5%.The possible causes of this diagnostic code are listed:
There is an open in the sensor circuit.
The signal circuit is shorted to another circuit.
The sensor has failed.
The ECM has failed. This condition 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 Lift Kickouts will not work properly.
Float will not work properly.
Tilt Kickouts will not work properly.
Snubbing features will not work properly.
Some implement functions may operate at a reduced speed.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 between 18 VDC and 32 VDC.Results:
OK - The voltage is between 18 VDC and 32 VDC. Proceed to Test Step 2.
NOT OK - The voltage is not between 18 VDC and 32 VDC. 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 C530-BU(Blue)) 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