Massey Ferguson X261 – AUTO 5 DC: Front Right-Hand Suspended Cab Unit Fault

This fault code indicates an electrical issue with the front right-hand unit of the semi-active or active suspended cab system. The control module has detected an open circuit, a short circuit to the +12V power supply, or a short circuit to ground in the suspension unit's circuit.

• 8600 Series
• 8650
• 8660
• 8670
• 8680
• 8690
• 7600 Series

1. 1

   Visually inspect the wiring harness and connectors leading to the front right-hand cab suspension unit for chafing, corrosion, or loose connections.

2. 2

   Use a multimeter to test the wiring for the front right-hand suspension unit for continuity (to check for open circuits) and for shorts to power and ground.

3. 3

   Connect diagnostic software to view live data from the suspension sensors; an unsteady signal from the front right-hand unit while stationary indicates a faulty sensor.

4. 4

   Check for symptoms of Service Bulletin 17-0031 (constant up-and-down cab movement), which indicates loose restrictors (SRE1 and SRE2) in the cab suspension block that could potentially lead to an electrical fault.

1. 1

   Repair wiring and connectors

   If diagnostic checks reveal a wiring issue, repair or replace the damaged section of the harness. Ensure all connectors are clean, secure, and making good contact.

2. 2

   Replace suspension sensor

   If live data shows an erratic signal from the front right-hand unit, replace the faulty sensor.

3. 3

   Update suspension block restrictors

   If the cab moves up and down constantly (per SB 17-0031), replace the restrictor plugs in the cab suspension block with the updated, longer versions. Replace the entire block if it is damaged.

4. 4

   Calibrate suspension system

   After any repairs to the cab suspension system, perform a calibration procedure using diagnostic commands to allow the system to relearn sensor positions and limits.