Description:

This diagnostic trouble code, TSC 523974.18, is triggered when the suspended front axle fails to achieve the commanded maximum pressure (185 bar; 18500 kPa; 2683 psi) during the TLS oil pressure sensor check.

Reaction:

When this error occurs, the TLS system may not reach the necessary maximum pressure, potentially affecting vehicle stability and performance.

Recommendations:

Inspect Oil Pressure Sensor:

• Check Sensor Functionality:
  • Verify the operation of the TLS oil pressure sensor B167.
  • Replace the sensor if it is faulty.

Inspect Hydraulic System:

• Check Hydraulic Components:
  • Inspect the hydraulic system for any blockages, leaks, or other issues that may prevent achieving the commanded maximum pressure.
  • Repair any identified problems in the hydraulic system.

Verify Solenoid Valve Functionality:

• Check Solenoid Valve Operation:
  • Ensure the solenoid valves responsible for pressure changes are operating correctly.
  • Replace any faulty solenoid valves.

Check System Calibration:

• Perform Calibration:
  • Follow the manufacturer’s instructions to recalibrate the TLS system to ensure it can achieve the commanded maximum pressure.

Inspect for Mechanical Issues:

• Check for Mechanical Obstructions:
  • Ensure there are no mechanical obstructions or excessive wear in the TLS components that could prevent achieving the required pressure.

Note:

Achieving the proper maximum pressure in the TLS system is crucial for vehicle stability and performance. Regular inspections and maintenance of the oil pressure sensor, hydraulic system, and solenoid valves are essential to prevent operational issues.