New Holland 2075 – TCM: Short Period Longer Than Long Period

The Transmission Control Module (TCM) has detected a timing or signal irregularity from the flywheel speed sensor, where the measured short pulse is longer than the expected long pulse. This corrupted signal indicates the sensor cannot accurately read the flywheel's rotational speed and position, which can cause the engine to crank without starting, erratic shifting, limited gear availability, or the machine entering limp mode.

• T6010
• T6020
• T6030
• T6040
• T6050
• T6060
• T6070
• T6080
• T6090
• T7030
• T7040
• T7050
• T7060
• TS100A
• TS110A
• TS115A
• TS125A
• TS135A
• TM115
• TM120
• TM130
• TM140
• TM155
• TM175
• TM190
• TG210
• TG230
• TG255
• TG285
• 8670
• 8770
• 8870
• 8970
• 8670A
• 8770A
• 8870A
• 8970A
• TV140
• TV145
• TV6070

1. 1

   Check for related fault codes such as 2076 (open circuit), 2077 (short circuit), or 2079 (no signal) to help pinpoint the issue

2. 2

   Inspect the wiring harness and connectors leading to the flywheel speed sensor for chafing, corrosion, moisture, vibration, or loose connections

3. 3

   Check the sensor installation and verify the air gap between the sensor tip and the flywheel teeth is within the 0.5-2mm specification

4. 4

   Test the sensor power supply for proper voltage and ground at the electrical connector

5. 5

   Remove and clean the magnetic flywheel speed sensor to clear any accumulated metallic debris that could interfere with the signal

1. 1

   Isolate the fault

   Perform the diagnostic checks listed above to determine if the issue is with the sensor itself, the wiring, or the control module.

2. 2

   Address wiring issues

   If diagnostic checks reveal damaged wiring or poor connections, repair or replace the affected section of the harness and ensure all connectors are clean and secure.

3. 3

   Replace flywheel speed sensor

   If the sensor is faulty, disconnect the negative battery terminal, locate the sensor on the engine block, and disconnect the electrical connector. Remove the mounting bolt and carefully extract the sensor. Install the new sensor ensuring the correct air gap (0.5-2mm), then reconnect the electrical connector and battery.

4. 4

   Clear fault codes

   Use a diagnostic tool to clear the fault codes from the Transmission Control Module (TCM) after repairs are completed.

5. 5

   Perform calibration

   If required by the specific tractor model, perform a transmission or sensor calibration after replacing the flywheel speed sensor.