CLAAS Id7743h / 7743h (636 06) – ENG (A15) - Engine Control Module: Intensity of the position sensor of the high pressure pump high.

The current (intensity) or signal voltage from the high-pressure pump position sensor is too high. This typically indicates a short-circuit to power (12V/5V) in the sensor's wiring harness or an internal short within the sensor itself. The engine runs normally without considering the information delivered by the sensor in error. The engine control unit will default to using the crankshaft position sensor (B231) to determine the piston's position and manage engine speed.

• Axion 810
• Axion 820
• Axion 830
• Axion 840
• Axion 850
• Arion 610
• Arion 620
• Arion 630
• Arion 640
• Arion 650
• Arion 510
• Arion 520
• Arion 530
• Arion 550
• Arion 410
• Arion 430

1. 1

   Check the connectors and the continuity of the wiring harness connecting the high-pressure pump position sensor (Component B232) to the Engine ECU (A15).

2. 2

   Check for a short-circuit to power (which causes the 'intensity high' condition) or an open circuit.

3. 3

   Verify the sources of energy (supply voltage and ground) at the sensor connector.

4. 4

   Check the internal resistance of the B232 sensor to see if it falls outside of the specified OEM range.

1. 1

   Locate the Sensor

   Locate the high-pressure pump position sensor (Component B232) on the engine timing cover / high-pressure fuel pump assembly.

2. 2

   Inspect the Harness

   Disconnect the sensor and inspect the pins for corrosion, bent terminals, or moisture. Trace the wiring back to the ENG (A15) module looking for chafed wires shorting to a power source.

3. 3

   Test the Sensor

   Using a multimeter, test the sensor's resistance. If the sensor is internally shorted, it must be replaced.

4. 4

   Replace the Sensor

   If the wiring is intact and the sensor is deemed faulty, remove the mounting bolt securing the B232 sensor and pull it from the housing. Install the new sensor and torque the mounting bolt to specification.

5. 5

   Clear Codes

   Reconnect the harness, turn the battery master switch on, and clear the fault codes from the tractor's diagnostic menu.

6. 6

   Test Drive

   Start the engine and verify that the code does not return and that the engine timing/speed management operates correctly.