Case IH 3188 (DTC 5316) - ECU – Engine Control Unit (ECU): Open load error of injector in cylinder 1

The Engine Control Unit (ECU) diagnostic procedure has used pattern detection to identify a hardware error in the power stage of the cylinder 1 injector (component Y-061). The ECU detects that the electrical circuit to the injector is open, meaning there is a broken wire, a disconnected harness, or an internal failure within the injector's solenoid coil.

• MAXXUM T4E
• Puma series
• Magnum series (180, 190, 210, 225, 235-340)
• Steiger series (450)
• Maxxum series
• Axial-Flow 240 series (7240, 8240, 9240)
• 7230
• 8230
• 9230
• A8000 series
• A8800 series

1. 1

   Check for other error codes. If no other error code is present, proceed to the next step.

2. 2

   Verify that the tractor's battery power supply has not been connected to an external power supply. If connected, disconnect it and test the system for normal operation.

3. 3

   Inspect the external wiring cables between the injector and the engine control unit for obvious broken wires or disconnections.

4. 4

   Disconnect the engine cylinder harness from the injector (valve) cover at connector X-825. Use a multimeter to measure the resistance on the injector cover side to determine if the open circuit is in the external harness or under the valve cover.

1. 1

   Access the injector

   Remove the injector (valve) cover.

2. 2

   Disconnect the injector

   Disconnect the internal injector harness from the Cylinder 1 injector at connector Y-061.

3. 3

   Test the injector solenoid

   Test the Cylinder 1 injector (Y-061) solenoid coil for continuity.

4. 4

   Evaluate the circuit

   If there is no continuity across the injector coil, the Cylinder 1 injector Y-061 solenoid coil has failed internally and must be replaced. If there is continuity across the injector coil, the injector is fine, but there is a wiring failure (such as a short to ground or open circuit) between connector Y-061 (pin 1) and connector X-825 (pin 4). Locate and repair the damaged conductor in the harness.

5. 5

   Clear codes

   After the repair is complete, an Electronic Service Tool must be used to remove the faults from the ECU memory.