John Deere 000158.04 – PTD: Low Ignition Supply Voltage

The Range Module Direct Drive (PTD) has detected a low switched ignition supply voltage. The FMI .04 indicates a 'Voltage Below Normal, or Shorted to Low Source' condition. This signifies an issue with the power supply to the transmission's Direct Drive range module, which can restrict its function and impact the overall operation of the machine. This fault is commonly associated with John Deere R Series Tractors manufactured between 2015 and 2021.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R

1. 1

   Cycle the key switch off and on to see if the code clears

2. 2

   Reduce electrical load by turning off non-essential components and increase engine RPM to see if the code resolves

3. 3

   Inspect battery terminals, battery cables, and alternator for corrosion, damage, or accumulated debris

4. 4

   Check for loose or broken ground wires, as a poor ground connection can cause intermittent communication and voltage issues

5. 5

   Inspect relevant fuses to ensure they are not blown

6. 6

   Test the battery to ensure it is holding a proper charge and test the alternator's output to confirm it is charging correctly

1. 1

   Locate the PTD Controller

   Find the PTD controller, typically located behind a panel in the cab on R Series tractors. Look for an identification sticker.

2. 2

   Test voltage at controller

   With the key in the 'on' position, use a multimeter to test the voltage at the PTD controller's power supply pin. The voltage should be within the manufacturer's specified range. A low reading at the controller confirms the fault code.

3. 3

   Trace the wiring harness

   If voltage is low, trace the wiring harness from the PTD controller back to the power source (fuse box and battery). Look for signs of damage, chafing, or corrosion on wires and connectors.

4. 4

   Perform a voltage drop test

   A voltage drop test can help identify high resistance in the circuit that may not be visually apparent. Measure the voltage difference between the start and end of a wire segment (e.g., from the fuse to the controller connector). A significant voltage drop indicates a problem in that section of the wiring.

5. 5

   Repair damaged electrical components

   Repair or replace any damaged wires, corroded connectors, or faulty fuses. Replace broken ground wire eyelets with new terminals and secure the connection.

6. 6

   Re-test and replace controller if necessary

   Clear the fault codes and re-test the system. If the code persists after verifying the integrity of the electrical supply and ground circuits, the PTD controller itself may be faulty and require replacement.