Challenger E9304 – TCU: No Data About Tractor Speed

The tractor's control system is not receiving a signal from the component that measures the tractor's speed. This interruption in data flow regarding the speed of the tractor can impact the proper operation of various powertrain and vehicle systems that rely on speed information.

• MT765
• 35
• 45
• 55
• MT525B
• MT535B
• MT545B
• MT555B
• MT565B
• MT575B

1. 1

   Use the tractor's onboard diagnostics to confirm that E9304 is an active fault

2. 2

   Visually inspect the wiring harness leading to the transmission speed sensors for any signs of damage, such as chafing, corrosion, or loose connections

3. 3

   Check any fuses related to the transmission and electronic control modules

1. 1

   Locate the speed sensor(s)

   Identify the location of the transmission speed sensors. Locations vary by model (e.g., Challenger 35/45/55 have an engine speed sensor in the front housing and an output shaft speed sensor in the lower center housing; MT765 has the output speed sensor on the front of the transmission near the lower right of the center output shaft's bearing holder).

2. 2

   Test the sensor

   Using a multimeter or oscilloscope, check the sensor for a proper electrical signal (pulse) as the corresponding gear or shaft rotates.

3. 3

   Replace the sensor

   If the sensor fails the electrical test and is found to be faulty, replace it with a new unit.

4. 4

   Clear fault codes

   After the repair, use the tractor's diagnostic system to clear the E9304 fault code and test the tractor to ensure the issue is resolved.