New Holland 18024 – ACM: EHR Flow Encoder Position Error

The Armrest Control Module (ACM) has detected an error in the position of the EHR flow code sensor, which is associated with the remote control valve. This indicates a potential issue with the sensor's alignment or functionality relative to the remote control valve. The signal from the encoder (potentiometer) that informs the control module of the desired hydraulic flow rate is not what the system expects, likely due to an incorrect voltage reading or a complete loss of signal.

• T4.80F
• T4.90F
• T4.100F
• T4.110F
• T4.80LP
• T4.90LP
• T4.100LP
• T4.110LP
• T4.80N
• T4.80V
• T4.90N
• T4.90V
• T4.100N
• T4.100V
• T4.110N
• T4.110V
• T6030
• T6050
• T6070
• T6080
• T6090
• T6.140
• T6.145
• T6.150
• T6.155
• T6.160
• T6.165
• T6.175
• T7.170
• T7.185
• T7.200
• T7.210
• T7.220
• T7.235
• T7.250
• T7.260
• T7.270
• T7.175
• T7.190
• T7.225
• T7.230
• T7.245
• T7.290
• T7.315
• T7030
• T7040
• T7050
• T7060
• T7070
• T8.275
• T8.300
• T8.320
• T8.330
• T8.350
• T8.360
• T8.390
• T8.410
• T8.420
• T8.435
• T9.435
• T9.450
• T9.480
• T9.505
• T9.530
• T9.560
• T9.565
• T9.600
• T9.615
• T9.645
• T9.670
• T9.700

1. 1

   Verify the fault code 18024 is active using the tractor's diagnostic menu or an Electronic Service Tool (EST)

2. 2

   Check for other active fault codes, especially those related to the ACM, CAN bus communication, or power supply, as these can trigger secondary faults

3. 3

   Check the power supply voltage to the Armrest Control Module to ensure it is receiving correct voltage

4. 4

   Inspect the wiring harness and connectors leading to and within the armrest console for chafing, pinching, corrosion, or broken wires near the plug

5. 5

   Test the suspected 3-wire EHR flow encoder potentiometer with a multimeter (measure for fixed resistance between outer terminals, and smooth resistance change between the center wiper and outer terminal while turning the knob)

1. 1

   Prepare machine for service

   Park the tractor on a level surface, lower all implements, turn off the engine, and disconnect the battery before working on electrical components.

2. 2

   Access armrest internals

   Disassemble the armrest console to gain access to the electronic components, including the EHR flow control knobs.

3. 3

   Identify faulty component

   Locate the specific EHR flow encoder/potentiometer associated with the fault (the knob controlling the affected remote valve).

4. 4

   Replace potentiometer

   If diagnostic tests confirm the potentiometer is faulty, replace it with a new EHR Flow Control Knob Potentiometer.

5. 5

   Reassemble and restore power

   Reassemble the armrest console, reconnect the battery, and turn on the ignition.

6. 6

   Clear fault codes

   Use the tractor's diagnostic system or an EST to clear the fault codes.

7. 7

   Perform functional test

   Operate the hydraulic remote controlled by the new potentiometer to ensure it is functioning correctly. Check for smooth and proportional control of the hydraulic flow.

8. 8

   Calibration

   Perform a calibration of the new component if required by the system, typically done through the tractor's diagnostic menu or with an EST.