Locks: Description and Operation

This system frees or locks the rear differentials according to the position of the rear differential lock control SW. The differential will lock only when rear differential lock detection SW is ON and the vehicle speed is at 8 kph (5 mph) or less.

When the rear differential lock control SW is switched from OFF position to ON position, the current flows to TERMINAL 4 of the 4WD control ECU. If the limit SW ON the lock side inside the rear differential lock motor is ON at this time, until the limit SW is turned OFF, the current flows from the 4WD fuse to TERMINAL 5 of the 4WD control ECU --> TERMINAL 3 --> TERMINAL 3 of the rear differential lock motor --> TERMINAL 2 --> TERMINAL 2 of the 4WD control ECU --> TERMINAL 7 --> Ground. This drives the rear differential lock motor and locks the rear differential. When the rear differential locks, the rear differential lock detection SW turns ON, lighting up the rear differential lock indicator light in the Combination Meter. When the rear differential lock control SW is switched from ON position to OFF position, current to TERMINAL 4 of the 4WD control ECU is cut OFF. If the limit SW ON the free side the rear differential lock motor is ON, until the limit SW is turned OFF, the current flows from the 4WD fuse to TERMINAL 5 of the 4WD control ECU --> TERMINAL 2 --> TERMINAL 2 of the rear differential lock motor --> TERMINAL 3 --> TERMINAL 3 of the 4WD control ECU --> TERMINAL 7 --> Ground. This drives the rear differential lock motor and frees the rear differential. When the rear differential is free, the free differential lock detection SW and the rear differential lock indicator light in the Combination Meter are turned OFF

The differential lock indicator light flashes when :
^ The rear differential control SW is switched to ON position during differential lock prohibition condition (Vehicle Speed Above 8 kph (5 mph))

^ The rear differential lock detection SW is turned OFF during operation of the rear differential lock motor