John Deere 3465.09 – ECU: Exhaust Throttle Actuator Loss of Communication

The Engine Control Unit (ECU) has lost its data link communication with the exhaust throttle actuator, preventing it from monitoring or controlling the exhaust throttle flap's position. The exhaust throttle valve regulates exhaust flow to enhance engine efficiency, manage temperatures, and control emissions. This communication failure can lead to reduced engine power, the machine entering a limp-home mode, and the illumination of the check engine light or other warning indicators.

• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 5085M
• 5100M
• 5100MH
• 5100ML
• 5115ML
• 6090MC
• 6090RC
• 6100MC
• 6100RC
• 6110MC
• 6110RC
• 5045E
• 6105E
• 160GLC
• 210G
• 210GLC

1. 1

   Check for related ECU codes (003465.05, 003465.06, 003465.31) that might indicate a circuit issue rather than a dead actuator

2. 2

   Inspect the wiring harness and Exhaust Throttle Actuator (Y5402) drive circuits (e.g., pins 5 and 12 on Connector 2) for chafing, melted wires, or loose pins

3. 3

   Physically inspect the actuator in the exhaust stream for heavy soot build-up that can jam the mechanism and cause communication timeouts

1. 1

   Safety First

   Disconnect the machine's batteries. Ensure the engine and exhaust components are completely cool before servicing.

2. 2

   Drain Coolant

   Place a drain pan under the engine and drain the cooling system.

3. 3

   Disconnect Lines and Wiring

   Disconnect the electrical connector (Y5402) from the actuator. Disconnect the Exhaust Throttle Actuator Coolant Supply Line and Coolant Return Line.

4. 4

   Remove the Actuator

   Unbolt the actuator assembly from the exhaust/turbocharger housing.

5. 5

   Install the New Actuator

   Mount the new actuator and torque the bolts to OEM specifications.

6. 6

   Reconnect Systems

   Reinstall the coolant supply and return lines. Reconnect the electrical harness.

7. 7

   Refill and Bleed

   Refill the engine with John Deere approved coolant and bleed the cooling system to remove air pockets.

8. 8

   Calibration

   Reconnect the batteries. Clear the ECU fault codes. The ECU may require an actuator learn procedure upon startup.