CLAAS Id7742h / 7742h (636 05) – ENG (A15) - Engine Control Module: Intensity of the position sensor of the high pressure pump low.

The Engine Control Unit has detected that the electrical current or signal voltage from the high-pressure fuel pump's position sensor (B232) is below the minimum expected threshold, indicating high resistance, an open circuit, or a failing sensor. The engine compensates by using the crankshaft position sensor, but may experience extended cranking times and reduced power.

• 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 540
• Arion 550
• Arion 410
• Arion 420
• Arion 430

1. 1

   Inspect the physical condition of the high-pressure pump position sensor (B232).

2. 2

   Check the connectors and the continuity of the wiring harness linking the B232 sensor to the ENG (A15) engine module.

3. 3

   Test the circuit for any open circuits or short-circuits to ground.

4. 4

   Verify the 5V reference supply voltage to the sensor and check the sensor's internal resistance against OEM specifications.

5. 5

   Ensure the ENG (A15) engine module is outputting the correct reference voltage and is not suffering from a pin or connector failure.

1. 1

   Preparation

   Turn off the engine, remove the key, and disconnect the battery to prevent electrical shorts. Allow the engine to cool.

2. 2

   Locate the Sensor

   Locate the B232 high-pressure pump position sensor. It is mounted on the engine timing cover near the high-pressure fuel pump pinion.

3. 3

   Clear the Area

   Remove any brackets or covers obstructing access to the timing cover.

4. 4

   Disconnect Wiring

   Carefully unplug the electrical connector from the B232 sensor. Remove the bolts securing the clamps on the wiring harness for the sensor to free up the line.

5. 5

   Remove the Sensor

   Remove the mounting bolt(s) securing the position sensor to the timing cover. Pull the sensor straight out of its bore.

6. 6

   Install the New Sensor

   Lubricate the O-ring on the new sensor with clean engine oil. Insert the new sensor into the timing cover and tighten the mounting bolt to the specified torque.

7. 7

   Reassembly

   Reconnect the wiring harness, secure the harness clamps, and restore any covers removed during disassembly.

8. 8

   Clear Codes

   Reconnect the battery, clear the fault codes from the ENG (A15) module using a diagnostic tool, and test-start the engine to ensure the extended cranking symptom is resolved and the code does not return.