Case IH 3261 – Engine Controller: Engine Controller Starter Relay Circuit Low Side Driver - Short Circuit To Battery Of Excess Temperature

The Engine Control Unit (ECU/EDC) has detected a short to the battery or an over-temperature condition on the low-side driver circuit that controls the starter relay.

• Farmall
• skid steer
• Steiger T4B
• Steiger
• Magnum
• Maxxum
• SSL (Skid Steer Loaders)
• CTL (Compact Track Loaders)
• Axial-Flow Combines
• Cotton Express Pickers

1. 1

   Monitor for intermittency: If the code clears and does not return, it may have been a temporary over-temperature spike in the power stage

2. 2

   Inspect the starter relay and the wiring harness between the Engine Controller and the starter relay for a short circuit to the battery on the low-side control circuit

3. 3

   Verify the Engine Controller module: If the wiring harness and relay test fine, the fault indicates an internal hardware failure (ADC failure or burnt power stage) within the Engine Controller itself

1. 1

   Test and Replace Relay/Wiring

   Locate the starter relay. Test the relay and the low-side driver wire running back to the Engine Controller for a short to battery voltage. Repair any chafed wiring or replace a shorted relay.

2. 2

   Replace the Engine Controller

   If the fault code persists after verifying the integrity of the circuit, the official repair procedure dictates that you must replace the Engine Controller.

3. 3

   Reprogram the New Module

   After replacing the Engine Controller, you must connect the appropriate electronic service tool (EST) to reload the engine dataset and restore the machine's self-learning parameters.