John Deere 523974.16 – SFA: Commanded Minimum Pressure Could Not Be Achieved

Triggered during the TLS (Total Lubrication System / Triple Link Suspension) oil pressure sensor check when the system detects that the minimum pressure target (between 2 bar and 5 bar) could not be achieved.

• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6230
• 6330
• 6430
• 6090MC
• 6090RC
• 6100MC
• 6100RC
• 6110MC
• 6110RC

1. 1

   Inspect the TLS Oil Pressure Sensor (B167) signal output voltage to ensure it is within the expected range.

2. 2

   Examine the wiring harness and connections for the B167 oil pressure sensor for any signs of damage, loose connections, or corrosion.

3. 3

   Check the hydraulic circuit for blockages, leaks, or incorrect pressure changes that would prevent the axle from reaching the minimum 2 to 5 bar target.

4. 4

   Test the circuits for the specific solenoid valves responsible for suspension movement and pressure (Y066, Y067, Y068, Y069).

1. 1

   Test and Replace Sensor

   If the B167 oil pressure sensor fails the voltage output test, replace the sensor.

2. 2

   Repair Wiring

   Repair or replace any faulty wiring or corroded harness connectors in the B167 sensor circuit.

3. 3

   Address Hydraulic Leaks/Blockages

   Repair any identified physical leaks or blockages in the front axle hydraulic circuit.

4. 4

   Replace Faulty Solenoids

   If the Y066, Y067, Y068, or Y069 solenoid valves are sticking, suffering from internal spool wear, or have a failed coil preventing electronic control, replace the faulty valve.

5. 5

   Recalibrate the System

   After replacing the sensor, valves, or repairing the hydraulics, follow the manufacturer's instructions to recalibrate the TLS/SFA system to ensure accurate pressure readings and proper leveling.