John Deere 523652.09 – Armrest Interface Control Unit (AIC): Armrest Engine Speed Control Module Message Missing

The Armrest Interface Control (AIC) software is failing to receive a required LIN (Local Interconnect Network) message from the Armrest Engine Speed Control Module (Hand Throttle Module), causing the control unit to limit engine speed control functionality.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 8225R
• 8245R
• 8270R
• 8295R
• 8320R
• 8335R
• 8345R
• 8370R
• 8400R
• 9470RT
• 9520RT
• 9570RT

1. 1

   Inspect the LIN Bus system and the communication lines between the AIC and the engine speed control module for physical damage, disconnections, or interference.

2. 2

   Use diagnostic tools to trace and confirm the continuity and integrity of the LIN Bus network.

3. 3

   Ensure that all wiring connections are secure and that no corrosion or wear is interfering with signal transmission.

4. 4

   Check the engine speed control module (hand throttle module) to verify it is correctly powered and functioning.

5. 5

   Review software settings and configurations in both the AIC and the engine speed control module to ensure they are correctly set up for communication.

1. 1

   Repair or replace wiring

   Repair or replace any damaged, loose, or corroded wiring and connectors within the LIN communication network between the AIC and the Hand Throttle Module.

2. 2

   Replace module

   If diagnostic testing confirms the module itself is defective and cannot transmit data, replace the Armrest Engine Speed Control Module (Hand Throttle Module).

3. 3

   Update software

   Update or reconfigure the software and firmware settings in both the AIC and the engine speed control module to correct any discrepancies or bugs that could be affecting communication.

4. 4

   Reset control units

   Reset the involved control units to clear any transient errors or glitches.

5. 5

   Test run

   Perform a test run of the tractor to ensure that the AIC is now successfully receiving messages from the engine speed control module and that full functionality has been restored.