John Deere 521465.09 – AIC: Armrest Engine Speed Control Module Message Missing

The AIC is not receiving the expected LIN message from the engine speed control module (hand throttle), indicating a failure in the Local Interconnect Network (LIN) communication.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R

1. 1

   Inspect the LIN communication lines (wiring harnesses) between the AIC and the engine speed control module for any signs of damage, chafing, disconnection, or interference.

2. 2

   Ensure all harness connections are secure, free of corrosion, and properly shielded to prevent electrical interference.

3. 3

   Perform diagnostic tests on the engine speed control module to verify its operational status, ensuring it is correctly powered and capable of sending/receiving LIN messages.

4. 4

   Check the software and firmware versions in both the AIC and the engine speed control module to identify any discrepancies or bugs affecting communication.

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