New Holland ENG 3053 – Engine Control Module (ECM): Vehicle Speed Sensing (Tacho) - PWM Frequency Too High

The control module is receiving a Pulse Width Modulated (PWM) signal from the vehicle speed sensor (tachograph/speedometer sensor) where the frequency is registering above the acceptable maximum limit.

• New Holland T8.xxx Series tractors
• Various New Holland and Case IH machines equipped with Cursor engines (Tier 3 / Tier 4A)

1. 1

   Verify the vehicle speed sensor's physical installation

2. 2

   Check the sensor wiring harness for shorts that could distort the frequency

3. 3

   Verify the PWM signal frequency coming from the tacho sensor to the Engine ECM

1. 1

   Repair or replace

   Replace the faulty speed sensor or repair the damaged wiring harness causing the high-frequency signal.

2. 2

   Clear DTC

   Clear the DTC (Diagnostic Trouble Code) from the engine ECU.