New Holland 18045 – Armrest Control Module: EHR Lever Position (Remote Control Valve) 3 - Too High Voltage

The controller is receiving a signal voltage from the Electro-Hydraulic Remote (EHR) valve #3 control lever that exceeds the normal operating range (typically above 4.5V - 4.8V). This condition is almost always caused by an internal failure of the lever's potentiometer, a short to a power source (5V or 12V) in the signal wire, or an open ground circuit on the lever's sensor loop.

• T4.80F
• T4.90F
• T4.100F
• T4.110F
• T6.140
• T6.155
• T6.175
• T7.170
• T7.185
• T7.200
• T7.210
• T7.220
• T7.270
• T8.275
• T8.300
• T8.330
• T8.360
• T8.390
• T8.420
• T9 Series
• SP.300F
• SP.400F
• E70
• E80
• EH70
• EH80
• EH130
• EH160
• EH215

1. 1

   Inspect the wiring harness and connectors leading to the armrest controller for chafing, pinching, or breaks.

2. 2

   Check for internal wire breaks near the plug by gently pulling on each wire to see if it stretches.

3. 3

   Test the 3-wire potentiometer functionality with a multimeter to check for an internal short or failure.

4. 4

   Check the tractor's diagnostic display for other active fault codes, such as communication errors (e.g., code 4100) or power supply issues that could trigger this fault.

1. 1

   Attempt Recalibration

   Access the 'H' menu on the tractor's display and navigate to the armrest or auxiliary lever calibration menu (may be listed as 'AUX LEVER'). Follow the on-screen prompts to move the lever to its full extend, retract, and neutral positions. Clear the fault code and test.

2. 2

   Replace Potentiometer or Lever Assembly

   If recalibration fails, disassemble the armrest control panel and replace the faulty potentiometer. If the potentiometer is integrated into the EHR lever or switch assembly, replace the entire unit.

3. 3

   Replace Armrest Control Module

   If the sensor and wiring are functional and the fault persists, the issue may be internal to the control module's circuitry. Replace the Armrest Control Module as a last resort.

4. 4

   Perform Post-Replacement Calibration

   After replacing any components, recalibrate the armrest controls so the system recognizes the new component's voltage range.