Case IH P06 – Electronic Draft Control (EDC) / Rear PTO Controller: Rear PTO Not Calibrated

The electronic control system has lost the calibration values for the rear Power Take-Off (PTO) clutch engagement, or the non-volatile memory has been reset, preventing the PTO from operating smoothly or starting at all.

• MXM
• MXM 120
• MXM 130
• MXM 140
• MXM 155
• MXM 175
• MXM 190
• TM 115
• TM 120
• TM 135
• TM 140
• TM 150
• TM 155
• TM 165
• TM 175
• TM 190

1. 1

   Check for active codes for the PTO speed sensor (e.g., P27 / 5027) or cab/fender PTO switches (e.g., P33, P34, 5033, 5034) to ensure no hardware faults are preventing calibration.

2. 2

   Ensure transmission oil is warmed up to the required operating temperature (60°C - 105°C).

3. 3

   Ensure the tractor is parked on level ground, the parking brake is applied, and the ground speed display reads zero.

4. 4

   Verify the air conditioning system is switched off and all electro-hydraulic units/services are deselected to prevent parasitic draw.

1. 1

   Warm up fluid

   Warm up the transmission fluid to the required operating temperature (60°C - 105°C).

2. 2

   Prepare tractor

   Turn off the engine, apply the parking brake, and ensure all EDC and hydraulic controls are in their neutral/deselected positions.

3. 3

   Connect diagnostic tool

   Connect the CNH Diagnostic Tool (Tool No. 380000488) to the black diagnostic connector located beneath the Electronic Draft Control (EDC) operator panel.

4. 4

   Enter diagnostic mode

   Start the tractor and enter the diagnostic "H-Menu" mode.

5. 5

   Navigate menu

   Navigate to the "HF" menu, which is designated for "Manual Calibration for rear PTO".

6. 6

   Initiate calibration

   Follow the on-screen prompts to initiate the calibration. The display will typically show "CAL" and numbers will increase as the controller learns the clutch fill times and engagement points.

7. 7

   Complete calibration

   Hold the required inputs until the display reads "END", signifying the calibration is complete.

8. 8

   Verify repair

   Turn off the tractor, disconnect the diagnostic tool, and restart to verify the P06 code has cleared.