Case IH 17632 (F-518241-31) - ECU – Engine Control Unit (ECU): ECU Internal Failure - Overvoltage Detection

The engine controller has detected a supply voltage that exceeds the maximum safe threshold, triggering an internal self-protection fault ('ABE active' triggered due to overvoltage detection).

• VESTRUM CVX
• 240 Series Axial-Flow Combines
• Austoft 9900 Sugarcane Harvesters
• Puma
• Magnum
• Steiger
• Case SSL
• Case CTL

1. 1

   Test System Voltage: Check the alternator output with a multimeter while the engine is running to ensure the voltage regulator has not failed and is not overcharging the system.

2. 2

   Inspect Wiring: Check the main power supply and ground circuits to the Engine Controller for shorts to power.

3. 3

   Check Relays: Inspect the Engine Controller Main Relay (Terminal 30) for defects, as early opening or sticking relays can cause voltage spikes.

1. 1

   Resolve overvoltage issues

   Resolve any external charging system or wiring harness overvoltage issues.

2. 2

   Replace ECU

   Replace the Engine Controller (ECU). The internal failure is generally not field-repairable and requires module replacement or professional remanufacturing.

3. 3

   Connect EST

   Connect the Case IH Electronic Service Tool (EST).

4. 4

   Restore Parameters

   Follow the appropriate service tool procedure to flash the new ECU, restore self-learning parameters, and sync the module with the machine's CAN-bus system.