VALVE 2941767 - Caterpillar

Illustration 1 g00803836
Schematic for the Auxiliary Lever Position Sensor
This diagnostic code is recorded when the implement electronic control module (ECM) determines that the signal for the auxiliary lever position sensor is too low. The lift lever position sensor is a pulse width modulated sensor.The possible causes for this diagnostic code are listed:
The auxiliary lever sensor rotated below the normal operating range.
The signal circuit is shorted to ground.System Response:The machine response is listed:
The auxiliary function will not operate.
The auxiliary lever must be recentered before movement of the auxiliary function is allowed.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 and that the diagnostic code indicator is active.Test Step 1. CHECK THE ALIGNMENT OF THE LEVER POSITION SENSOR
Check the mounting hardware for the lever position sensor. The fasteners should be tight. If the sensor shows any signs of damage the hardware should be replaced.
Check the duty cycle of the lever position sensor. In order to measure the duty cycle of the sensor, use a 9U-7330 Digital Multimeter with a 7X-1710 Probe Group. At the implement ECM, use contact J2-4 and contact J1-15. Move the control lever to the full travel in both directions. Expected Result:The duty cycle should be between 10% and 90%.Results:
YES - The duty cycle is correct.Repair: Calibrate the lever position sensor.STOP
NO - The duty cycle is not correct.Repair: Replace the lever position sensor. Calibrate the new sensor. Check for an active code.STOP