Description:

This diagnostic trouble code is generated when the PTA control software registers a voltage value at the proportional solenoid valve 1 that does not correspond with the commanded working position of the hydrostatic unit, indicating a short to ground in the circuit of the proportional solenoid valve 1.

Reaction:

Limited or no function of the transmission until the error is corrected, indicating a critical issue with the solenoid valve circuit.

Recommendations:

Inspect Solenoid Valve Circuit:

• Check the circuit for any short circuits to ground.
• Repair any identified issues in the circuit.

Test Proportional Solenoid Valve:

• Measure the voltage at the solenoid valve using a multimeter.
• Replace the solenoid valve if it is producing abnormally low voltage readings.

Examine Wiring and Connectors:

• Inspect all wiring and connectors associated with the solenoid valve for signs of damage or corrosion.
• Repair or replace any damaged components to ensure proper electrical connections.

Ensure Proper Grounding:

• Verify that the solenoid valve circuit is properly grounded.
• Correct any grounding issues that may be causing low voltage readings.

Note:

Low voltage readings from the solenoid valve can lead to severe operational problems. Regular inspection and maintenance of the solenoid valve and its circuitry are essential to prevent these issues.