Description:

This diagnostic trouble code, TSC 523974.16, is triggered when the minimum pressure target (between 2 bar; 200 kPa; 29 psi and 5 bar; 500 kPa; 72 psi) could not be achieved during the TLS (Total Lubrication System) oil pressure sensor check or during TLS pressure relief when the TLS front-wheel drive axle drops to its bottom position but fails to achieve the minimum pressure target (5 bar; 500 kPa; 72 psi).

Reaction:

When this error occurs, the TLS system may not maintain the required minimum pressure, potentially leading to operational issues and reduced 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 minimum 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 minimum 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:

Maintaining the proper minimum 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.