Case IH 18313 (518607.02, 518607.07) - ACML – ACML: EHR3 Program / Motor Mode Switch Error State

The EHR3 (Electro-Hydraulic Remote No. 3) Program / Motor Mode Switch is sending an implausible signal, or there is a poor electrical contact/contamination issue causing the module to read an error.

• MAXXUM T4E
• VESTRUM CVX
• Puma
• Magnum
• Maxxum
• Vestrum
• Steiger

1. 1

   H-Menu Switch Test: Enter the 'H5' Switch operation test menu on the tractor's instrument cluster. Actuate the EHR3 program/motor mode switch. The display should show the identifier code 'd97' and emit an audible tone.

2. 2

   Wiggle Test: If 'd97' is not displayed and no tone is heard, perform a 'wiggle test' on the armrest wiring harness while watching the display or listening for the tone to locate loose connections or crushed wires.

3. 3

   Software Version Check: Check the ACML software version (v3.0/v3.1 relaxes error parameters to prevent false codes caused by minor voltage fluctuations or grease/carbon contamination).

1. 1

   Update Software

   Update the ACML software to the latest version (v3.1 or higher) using the Electronic Service Tool (EST) to see if the relaxed parameters resolve the error state.

2. 2

   Access the Module

   If the fault persists, power down the machine and disassemble the right-hand armrest console to access the ACML and EHR switches.

3. 3

   Inspect Wiring

   Inspect the wiring harness for the EHR3 switch for crushed or damaged wires, which is a known cause for this fault. Repair any damaged wiring.

4. 4

   Clean Contacts

   Clean the switch contacts if carbon film or grease contamination is present.

5. 5

   Replace Components

   If the switch or module has a hard hardware failure, replace the faulty EHR switch or the entire Armrest Control Module.

6. 6

   Clear Codes

   Reassemble the armrest, power on the tractor, and clear the EEPROM fault codes using the H8 menu or EST.