Front Axle - M210: Notes
DESCRIPTION
There are two differentials available for the M210 axle, a conventional open differential and an optional Tru-Lok® differential.
| 1 - Hall Effect Axle Locker Position Sensor (used in vehicles built up to early 2023) |
| 2 - Eddy Current Axle Locker Position Sensor (used in vehicle built from late 2023) |
Tru-Lok® is an electronically locking differential. The differential has four pinion gears, three pinion shafts and two side gears. On the back side of one side gear is half of the dog clutch.
There are two variations of the Electronic locking Differential. For vehicles built up to early 2023, the locker uses a hall effect sensor to sense the if the differential is in a locked or unlocked state. The Hall effect sensor can be serviced separately from the actuator. Vehicles built from late 2023 began using a redesigned Tru-Lok® system with an Eddy current sensor to sense whether the differential is in a locked or unlocked state. The Eddy current sensor is serviced as an assembly with the actuator. The individual components that make up the Tru-Lok® system are not interchangeable between the early build and late build systems.
OPERATION
Pressing a two-way momentary rocker switch on the switch bank request axle lock. The first press DOWN requests rear axle to be locked, every other press DOWN toggles between "front and rear axle lock" and "rear axle lock" request states. Pressing the rocker switch UP requests both axles to be unlocked. The switch is on the instrument panel in the switch bank. The switch bank sends a message to the Instrument Panel Cluster (IPC). The IPC handles the switch de-bounce and switch diagnostics. Any one message sent by the IPC on the network is a valid switch change. The IPC passes the information via a Controller Area Network Internal High Speed (CAN-IHS) message. There are three telltales on the cluster, "Rear", "Front", and "Lock". The telltales will be off if the axles are unlocked, flashing if there is a pending request to lock but the axles are not yet locked (transition to lock, torque-locked, or conditions not correct), and flashing rapidly if there is a fault. The "Front" and "Rear" telltales will match the front and rear differential states. The "Lock" telltale will be on solid if either the "Front" or "Rear" telltale is on or blinking. For more information on locker operation. Refer to MODULE, DRIVETRAIN CONTROL (DTCM), DESCRIPTION AND OPERATION .