John Deere 000923.19 – ATC or ETC: M07/M10 - Fan Motor, Incorrect CAN BUS Message (Power Module (HF) PC6)

This fault code indicates a communication failure where the climate control system is receiving an invalid or missing CAN BUS message from the PC6 Power Module regarding the operation or status of the cab blower fan motors (M07 and M10).

• 6120
• 6220
• 6320
• 6420
• 6520
• 6620
• 6820
• 6920
• 6130
• 6230
• 6330
• 6430
• 6530
• 6630
• 6830
• 6930
• 7130
• 7230
• 7330
• 7430
• 7530

1. 1

   Access the cab roof/headliner area and perform a visual inspection of the fan motors (M07 and M10) and the driver unit for the fan motors (A59) for heavy dirt buildup or physical damage.

2. 2

   Inspect the electrical connections at the fan motors, the A59 driver unit, and the PC6 Power Module for bad, loose, widened, slid-back, or corroded contacts.

3. 3

   Perform a multimeter continuity and voltage test on the fan motor circuits to rule out an open circuit, short-to-power, or short-to-ground in the wiring harness.

1. 1

   Disconnect power

   Turn off the tractor and disconnect the negative battery cable to prevent electrical shorts during service.

2. 2

   Access the HVAC unit

   Remove the cab roof hatch or headliner panels to access the HVAC blower assembly and the PC6 Power Module.

3. 3

   Disconnect wiring

   Unplug the electrical harnesses connected to the M07/M10 fan motors and the A59 driver unit.

4. 4

   Remove the blower motor

   Remove the retaining screws/clips holding the faulty blower motor assembly in the HVAC housing and extract the motor.

5. 5

   Install the new part

   Seat the new blower motor into the housing and secure it with the mounting hardware.

6. 6

   Reassemble and test

   Reconnect the wiring harnesses, ensuring the connectors click firmly into place. Reinstall the roof/headliner panels, reconnect the battery, and turn on the tractor. Run the ATC/ETC system through all fan speeds to verify operation and ensure the code clears.