John Deere 3465.05 – ECU: Exhaust Throttle Actuator Drive Circuit Has High Resistance

The circuit resistance is too high, indicating an open circuit. This means the controller is unable to complete the electrical circuit to drive the actuator, typically due to a broken wire, a disconnected plug, or an internal open failure within the actuator's motor/coil.

• 5085E
• 5090E
• 5090EL
• 5100E
• 5085M
• 5100M
• 5100MH
• 5100ML
• 5115ML
• 5090M
• 5115M
• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6090MC
• 6100MC
• 6110MC
• 6090RC
• 6100RC
• 6110RC
• 7210R
• 7230R
• 7250R
• 7270R
• 7290R
• 7310R
• 160GLC
• 210G
• 210GLC

1. 1

   Visually inspect the wiring harness and electrical connector at the exhaust throttle actuator for disconnected plugs, backed-out pins, corrosion, or chafed wires

2. 2

   Use a multimeter to check continuity and resistance of the drive circuit wiring between the ECU harness connector and the actuator connector to isolate any breaks

3. 3

   Measure the internal resistance across the pins of the exhaust throttle actuator itself to check for an internal open failure (infinite resistance)

1. 1

   Wiring Repair

   If the diagnostic tests reveal a broken wire or damaged connector, repair the harness or replace the connector pigtail.

2. 2

   Actuator Replacement Preparation

   If the actuator is internally open, prepare to replace it. Because many of these actuators are cooled by engine coolant, drain the engine coolant into a clean container.

3. 3

   Removal

   Disconnect the electrical harness from the actuator. Remove the exhaust throttle coolant supply and return lines. Loosen and remove the exhaust throttle valve clamp(s) and remove the faulty actuator and gasket.

4. 4

   Installation

   Install the new exhaust throttle actuator with a new gasket. Secure it using the exhaust throttle valve clamp. Reconnect the coolant supply and return lines, and plug in the electrical connector.

5. 5

   Refill Fluids

   Refill the engine with coolant and bleed the cooling system to remove any air pockets.

6. 6

   Calibration

   Connect John Deere Service ADVISOR (or a compatible diagnostic tool) to the machine. You must perform an "exhaust throttle actuator learn value reset" (calibration) so the ECU can learn the end-stops of the new actuator.

7. 7

   Clear and Test

   Clear the 003465.05 fault code from the ECU. Start the engine and verify that the code does not return and the actuator operates smoothly.