Description:

This diagnostic trouble code is generated when the PTA control software registers a current value at the proportional solenoid valve 1 that does not correspond with the commanded working position of the hydrostatic unit, indicating that the circuit of the proportional solenoid valve 1 is open. If diagnostic trouble code PTA 524107.05 is also stored, a general problem with the supply voltage (VPS1) of proportional solenoid valves 1 and 2 is indicated.

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 open connections or breaks.
• Repair any identified issues in the circuit.

Test Proportional Solenoid Valve:

• Measure the current flow to the solenoid valve using a multimeter.
• Replace the solenoid valve if it is not drawing the correct current.

Examine Wiring and Connectors:

• Inspect all wiring and connectors associated with the solenoid valve for signs of damage or disconnection.
• 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 current flow.

Check Supply Voltage (VPS1):

• If diagnostic trouble code PTA 524107.05 is also stored, investigate the supply voltage (VPS1) for issues.
• Ensure VPS1 is providing stable voltage to both solenoid valves.

Note:

Low current 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.