CLAAS Id7760h / 7760h (654 05) – ENG (A15) - Engine Control Module (ECU): Open circuit on the electronic injector of cylinder n°4

The engine control module has detected that the electrical current to Injector #4 is less than expected, indicating an open circuit. The engine will run with difficulty, run rough, and misfire because the ignition/fuel delivery of the injector in cylinder n°4 is inoperative.

• Axion 810
• Axion 820
• Axion 830
• Axion 840
• Axion 850
• Arion 510
• Arion 520
• Arion 530
• Arion 540
• Arion 610
• Arion 620
• Arion 630
• Arion 640

1. 1

   Inspect the wiring harness for continuity between the Engine Module ENG (A15) and the Electronic Injector (Y320-4)

2. 2

   Check for physical damage, chafed wires, or disconnected/corroded connectors at both the ECU and the injector

3. 3

   Measure the electrical resistance of Injector #4's solenoid coil to verify if the internal circuit of the injector has failed

4. 4

   Verify the sources of energy (fuses, power supply, and ground connections) to the engine module and injector circuit

1. 1

   Disconnect battery and clean area

   Disconnect the battery and clean the area around the cylinder #4 injector to prevent debris from entering the engine.

2. 2

   Disconnect electrical connector

   Disconnect the electrical connector from Injector #4.

3. 3

   Remove fuel lines

   Remove the high-pressure fuel lines connected to the injector.

4. 4

   Remove injector coupling

   Smear the injector coupling to be removed with grease. Tap the injector coupling over 1 cm using an M22 x 250 tap. Install and screw the appropriate puller tool into the injector sleeve. Pull the injector coupling out.

5. 5

   Remove faulty injector

   Remove the faulty injector.

6. 6

   Install new injector

   Install the new injector with new O-rings and sealing washers.

7. 7

   Reinstall components

   Reinstall the injector coupling, high-pressure fuel lines, and electrical connector.

8. 8

   Bleed fuel system and clear codes

   Bleed the fuel system if required, reconnect the battery, and clear the fault codes from the ENG (A15) module.

9. 9

   Program injector trim code

   Depending on the exact engine generation, the new injector's trim code/calibration string may need to be programmed into the Engine ECU using a diagnostic tool.