Case IH 29 – Transmission ECM / Power Shuttle ECM: CLUTCH PACK (A) NOT CALIBRATED

Triggered when the key switch is in the 'ON' position and the system detects that Clutch Pack (A) lacks valid calibration values. This typically occurs if the Power Shuttle ECM was recently replaced, a Non-Volatile Memory Erasure (H8 procedure) was conducted, the Clutch Pack PWM Solenoids were replaced, the ECM's EEPROM/NVM memory is corrupted, or a previous calibration attempt failed.

• JXC
• TN55
• TN60
• TN65
• TN70
• TN75
• Farmall 65C
• Farmall 70
• Farmall 75C
• Farmall 95C
• JX60
• JX1060
• JX1070
• JX1075

1. 1

   Review repair history to determine if the Power Shuttle ECM or the Clutch Pack PWM Solenoids were recently replaced, or if the memory was recently flashed/erased (H8 procedure).

2. 2

   Check for 'U' Codes using the Customer Display Unit (CDU) or the Electronic Service Tool (EST) in the H1 menu to identify incorrect calibration values or failures.

3. 3

   Verify ECM integrity to ensure it can hold calibration values; if values are corrupt in the EEPROM, the ECM may need replacement.

1. 1

   Connect diagnostic tool

   Connect the CDU or EST tool to the machine to access the H1 Menu.

2. 2

   Navigate to Clutch A

   Navigate the menu until the display shows 'A', which indicates that Clutch Pack A is ready for calibration.

3. 3

   Begin calibration

   Press and hold the downshift button to begin calibrating Clutch A.

4. 4

   Hold button

   Keep the button held. The display will show a value for several seconds while the system monitors engine speed stability and shifts the synchronizers.

5. 5

   Complete calibration

   The displayed value will then increase rapidly. Calibration is complete when the display alternates.

6. 6

   Resolve errors if necessary

   If a Calibration 'U' Error occurs during this process, it prevents completion. You must resolve the mechanical/electrical cause (e.g., replacing a faulty PWM solenoid) and restart the H1 procedure.

7. 7

   Clear error code

   Once calibration is successful, access the HF Menu using the CDU/EST to clear the error code.