Description:

This diagnostic trouble code (TCU 524156.07) is generated if the amperage at the proportional solenoids of the hydrostatic unit does not match the registered ratio between the transmission input speed and the speed of the hydrostatic unit. This discrepancy implies a problem with the hydrostatic unit.

Reaction:

When this error code is detected, the equipment may experience issues with the operation of the hydrostatic unit, leading to potential performance problems. The system might enter a protective mode to prevent further issues, resulting in limited operational capabilities.

Recommendations:

1. Perform Preliminary Tests:

• Run Initial Diagnostics: Follow the “Preliminary Tests for Diagnostic Trouble Code TCU 524156.07” to identify potential issues.
• Check Solenoid Operation: Ensure that all proportional solenoids are operating correctly and providing the expected amperage.

2. Inspect Hydrostatic Unit:

• Visual Inspection: Look for any visible damage or signs of wear on the hydrostatic unit.
• Check Connections: Ensure all electrical connections to the hydrostatic unit are secure and free of corrosion.

3. Perform Pressure Tests:

• Use Test Result Table: Follow the “AutoPowr/IVT Transmission — Test Result Table” to conduct pressure tests on the transmission and other related components.
• Record Results: Document all test results and compare them with standard values.

4. Consult AfterSales Service:

• Submit Reports: If the issue cannot be resolved through preliminary tests, complete the required forms and send them to the relevant AfterSales Service station along with the service report.
• Follow Recommendations: Implement any recommendations provided by the AfterSales Service based on the test results.

Note:

Accurate diagnosis and resolution of hydrostatic unit issues are crucial for maintaining optimal equipment performance. Regular inspections and adherence to diagnostic procedures can help identify and resolve discrepancies in amperage readings.