John Deere 000190.31 – PTF / CCU / TSC: Missing Engine Speed CAN Message

This fault code indicates a critical communication breakdown on the Power Train CAN BUS. The control unit logging the fault is not receiving the required engine speed messages from the Engine Control Unit (ECU). This loss of data prevents the machine's various control modules from synchronizing their operations with the engine's current speed, which can lead to operational issues such as the machine failing to move.

• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6090MC
• 6090RC
• 6100MC
• 6100RC
• 6110MC
• 6110RC
• 6230
• 6330
• 6430
• Harvesters

1. 1

   Cycle power by shutting down the tractor, waiting 5-10 seconds for all modules to power down, and restarting to see if communication errors reset

2. 2

   Check the diagnostic display for other active fault codes that might indicate a systemic CAN BUS network issue

3. 3

   Visually inspect the wiring harnesses and connectors between the Engine Control Unit (ECU) and the logging module (CCU or PTF) for chafing, corrosion, or loose pins

4. 4

   Perform a CAN BUS resistance check with power off at the diagnostic connector (expected: ~60 Ohms across CAN High and CAN Low). A reading of 120 Ohms indicates a missing or failed terminating resistor, while a reading significantly lower than 60 Ohms could indicate a short in the wiring or a faulty control module

5. 5

   Perform a CAN BUS voltage check with power on (engine off). CAN High (Yellow) to ground should be 2.5-3.0V DC; CAN Low (Green) to ground should be 2.5-2.0V DC

1. 1

   Isolate the CAN BUS fault

   If resistance or voltage readings are incorrect, unplug controllers from the Power Train CAN BUS one at a time and re-check readings. The last controller unplugged when readings return to normal is likely the source of the short or failure.

2. 2

   Inspect engine speed sensor

   Inspect the engine speed sensor and its dedicated wiring for physical damage or connector issues.

3. 3

   Test sensor continuity

   Use a multimeter to test the continuity of the wiring between the engine speed sensor and the ECU. Refer to the machine's technical manual for correct pinouts and expected output values.

4. 4

   Reprogram or replace controller

   If wiring and the engine speed sensor are in good condition, the fault may lie within the ECU, CCU, or PTF. Have a dealer attempt to reprogram the suspect controller, or replace it if reprogramming fails.