Case IH 18030 – Armrest Control Module (ACM): EHR 6 lever position - voltage too high (not applicable to CCM/APH _it may indicate incorrect configuration of the ACM)

The signal voltage coming from the potentiometer on the Electronic Hitch/Hydraulic Remote (EHR) lever #6 is exceeding the normal operating range (typically indicating a short to a 5V reference, an open ground circuit, or a failed sensor). If the tractor is not physically equipped with a 6th remote valve, this code is triggered because the control module is incorrectly programmed to look for a 6th lever that does not exist.

• Magnum
• Steiger T4B
• Case IH Magnum 235 - 340 (Series 4)
• Case IH Steiger 350 - 600
• Case IH Puma 165 - 225 CVX
• Case IH Maxxum series

1. 1

   Verify if the tractor is physically equipped with a 6th rear remote valve lever (if not, this points to a configuration issue rather than a hardware failure)

2. 2

   Connect the Electronic Service Tool (EST) and verify the Armrest Control Module (ACM) configuration settings match the physical hardware (e.g., Config B/b 5.4 for EHR 6 lever position)

3. 3

   If the tractor is equipped with a 6th remote, inspect the wiring harness and connector at the EHR 6 lever inside the armrest for an open sensor ground wire or a short to the 5V reference wire

4. 4

   Monitor the EHR 6 lever voltage using the EST or a multimeter to check if the voltage remains stuck high while moving the lever, indicating a failed potentiometer

1. 1

   Resolve Configuration Issues

   If the tractor does not have a 6th remote, use the EST to navigate to the ACM configuration settings. Change the configuration to reflect the correct number of installed remote valves. This will stop the module from looking for the EHR 6 lever signal and clear the code.

2. 2

   Repair Wiring

   If the tractor has a 6th remote and wiring damage is found, repair any broken ground wires or shorted signal wires in the armrest harness leading to the EHR 6 lever.

3. 3

   Replace the Lever

   If the wiring is intact but the sensor fails testing, replace the EHR 6 lever assembly. Disconnect the battery, remove the armrest console cover, unplug the faulty EHR lever, and install the new assembly.

4. 4

   Perform Calibration

   After replacing the lever or updating the configuration, you must perform the EHR lever calibration procedure. This can be done via the EST or the tractor's H-Menu (using the CRPM switch on the dashboard to activate and calibrate the lever) to ensure the ACM learns the new potentiometer's minimum and maximum values.