John Deere PTI000168.01 – PTI: PTI Supply Voltage Low

The IVT Transmission Control Unit (PTI) is experiencing low supply voltage. This condition indicates that the power supplied to the Power Train Control Unit for the Infinitely Variable Transmission (IVT) or AutoPowr transmission has dropped below the required threshold, which can affect transmission operation.

• 7020 Series
• 8R Series
• 7630
• 7720
• 7730
• 7820
• 7830
• 7920
• 7930
• 8130
• 8230
• 8330
• 8430
• 8530

1. 1

   Reduce electrical load on the tractor to see if the voltage drop recovers and the code clears

2. 2

   Increase engine RPM to help the alternator generate more power

3. 3

   Power down the tractor and check fuse F15 for the CAB switched power voltage

4. 4

   Restart the tractor to cycle power, which may reset the control units and clear transient faults

1. 1

   Verify charging system

   Verify the integrity of the battery and the charging system to ensure adequate voltage is being produced and maintained.

2. 2

   Inspect wiring and connectors

   Inspect the wiring harness and connectors for the PTI control unit for any signs of damage, corrosion, or loose connections.

3. 3

   Test power and ground circuits

   Test the power supply and ground circuits to the PTI controller to ensure they meet specifications.

4. 4

   Perform dealer-level diagnostics

   If initial checks do not resolve the issue, use John Deere Service ADVISOR™ to pinpoint the root cause, which may require replacing the control unit or related modules.