CLAAS Id7755h / 7755h (652 02) – ENG (A15) - Engine Control Module: Reference of the injector of cylinder n°2 non valid.

This fault indicates that the calibration code (QR code string or part number data) programmed into the engine control unit for the cylinder #2 fuel injector is invalid, missing, or does not match what the system expects. As a result, the engine may run with difficulty, misfire, or operate in a degraded mode due to the invalid calibration of the injector.

• CLAAS Axion 810
• CLAAS Axion 820
• CLAAS Axion 830
• CLAAS Axion 840
• CLAAS Axion 850
• CLAAS Arion 610
• CLAAS Arion 620
• CLAAS Arion 630
• CLAAS Arion 640

1. 1

   Verify ECU Programming: Check the engine module ENG (A15) to see if the injector calibration code currently programmed for cylinder #2 matches the physical code printed on the injector (Y320-2).

2. 2

   Check Recent Service History: Determine if the injector for cylinder #2 was recently replaced. If it was, the technician likely failed to program the new injector's calibration string into the ECU.

3. 3

   Inspect Wiring & Connections: Check the connectors and continuity of the harnesses linking the engine module to the electronic injector (Y320-2). Look for short-circuits, open circuits, or high resistance.

4. 4

   Check Software Compatibility: Verify the compatibility of the ECU program versions, settings, and calibration files.

1. 1

   Read the Physical Code

   Locate the electronic injector for cylinder #2 (Component Y320-2) on the engine fuel rail. Read and write down the calibration QR code/string printed directly on the injector head.

2. 2

   Connect Diagnostic Tool

   Connect the CLAAS CDS (or John Deere Service ADVISOR) diagnostic tool to the tractor's diagnostic port.

3. 3

   Program the Injector

   Navigate to the Engine ECU (ENG A15) programming section. Enter the correct calibration string for cylinder #2.

4. 4

   Clear Codes & Test

   Clear the fault codes and run the engine. If the code does not return and the engine runs smoothly, the repair is complete.

5. 5

   Replace Injector (If Necessary)

   If the calibration string is correct but the fault persists (or if accompanied by circuit/current faults like 652 05 or 652 06), the injector's internal solenoid or electronics have failed. Depressurize the fuel system, remove the faulty injector, install a new injector with a new seal ring, and program the new injector's calibration code into the ECU.