If a range shift command is given but the shift lever is not in neutral (position 'N' or 'P' in vehicles with automatic transmission), in the message center field on the instrument panel (if any) the message 'SELECT NEUTRAL FOR RANGE CHANGE' will appear (select neutral for range change).
NOTE: If the shift lever on vehicles with automatic transmission is in the 'P' position, the range change will not occur, however the message 'SELECT NEUTRAL FOR RANGE CHANGE' (select neutral for range change) will not appear in the message center field.
When a low range is selected, the low range 'mountain' symbol will flash during the range change and stay on when the range change is completed. To confirm the completion of the range change, in the message center field of the instrument cluster (if any) 'LOW RANGE' message is displayed for about 3 seconds (low range), and then the instrument panel beeps. In vehicles with automatic transmission, only 'D' and 'Manual mode' are available (manual mode), 'Sport mode' (sports mode) not available for selection.
If a high range is selected, the low range 'mountain' symbol will flash during the range change and turn off after the range change. To confirm the completion of the range change, in the message center field of the instrument cluster (if any) the message 'HIGH RANGE' is displayed for about 3 seconds (high range), and then the instrument panel beeps.
The design of the transfer case allows you to switch ranges while the vehicle is moving within the following limits:
- Shifting from high to low range - speed must not exceed 40 km/h in vehicles with automatic transmission and 20 km/h in vehicles with manual transmission
- Switching from low to high range - speed must not exceed 60 km / h.
Shifting at speeds less than 3 km/h is interpreted by the transfer case control module as static shifting (switching while stationary). In vehicles with automatic transmission, the driver must then use the brake pedal to lock the selector to allow the shift lever to be moved from 'N' to 'D' after the range change is complete.
The high range should be set when driving on normal roads, as well as when driving off-road in dry, level terrain. Low range may only be required for low speed maneuvering, such as when reversing with a trailer, driving over rocky terrain, or when climbing steep, slippery slopes. Low range should also be engaged in extreme off-road conditions where high range prevents forward movement. Under normal driving conditions, low range cannot be used.
Terrain Response™
The Terrain Response™ system allows the driver to select a program that will provide the optimum traction and performance for the current road conditions.
The system is controlled by a rotary switch located on the center console. The rotary switch allows you to select one of five programs:
- Special programs off (normal road conditions)
- Grass/Gravel/Snow program (grass/gravel/snow).
- Mud/Ruts Program (mud/ruts).
- Sand program (sand)
- Rock crawl program (slow motion on rocky surface).
- Engine management system
- Automatic transmission (in the presence of)
- Transfer case
- Rear lockable differential (in the presence of)
- Brake system
- Air suspension
High range operation
In the high range, the primary torque generated by the gearbox is transmitted to the transfer case input shaft. The synchronizer sleeve connects the shaft directly to the differential housing. The differential distributes the torque between two side gears. One side gear is splined and transmits torque to the rear output flange. The second side gear is connected to the chain drive sprocket and transmits torque through the chain to the front output flange.
Low Range Operation
In the low range, the primary torque generated by the gearbox is transmitted to the transfer case input shaft. The synchronizer sleeve moves and connects the planetary carrier to the differential housing. In this state, the gearbox torque is transmitted to the planetary carrier through the planetary sun gear, as well as through the planetary gears and pinion shafts. Mounted inside the housing is a planetary ring gear that provides a low range gear ratio of 2.93:1. Then the torque through the synchronizer clutch enters the differential housing, where it is divided between two side gears. One side gear is splined and transmits torque to the rear output flange. The second side gear is connected to the chain drive sprocket and transmits torque through the chain to the front output flange.
Range switching while driving
The driver has the ability to switch low and high ranges both while driving and in a stationary car.
Pressing the range switch generates a request to change the range. This lever is located on the center console behind the main gear lever (beside him).
When the range lever is moved to the rear of the vehicle, a high to low shift request is issued, and conversely, when the range shift lever is moved to the front of the vehicle, a low to high range shift request is issued. The range lever is spring loaded in the center and thus does not lock into the forward and rear positions.
The selected range is indicated by a green lamp (symbol "mountains") on the instrument panel and the LEDs next to the range lever. The lamp does not light in the high range, lights up in the low range, and flashes during the change of ranges. There are 2 LEDs next to the range lever, one for high range and one for low range. During a range change, the LED of the newly selected range flashes.
The selected range is retained until the driver issues a switch request. Thus, the high range is not automatically restored after switching the ignition on and off.
Range switching order (only for vehicles with automatic transmission)
Before changing the range, the transmission must be in neutral, and the desired gear is selected only after the range change is completed. During a range change, the transmission is locked in neutral.
If you try to change range without putting the transmission in neutral, the shift request will be ignored, and the message center field on the instrument panel will (if any) a message will appear prompting you to select neutral.
The process of switching the range after accepting the corresponding request lasts no more than 1 second.
Range switching is possible only when the vehicle speed does not exceed the established limits. The maximum speed at which shifting from high to low range is possible is 40 km/h in vehicles with automatic transmission and 20 km/h in vehicles with manual transmission The maximum speed at which shifting from low to high range is possible is 60 km/h If a range change request is issued at a vehicle speed exceeding the limit, the request is rejected and the message center field on the instrument panel (if any) 'SLOW DOWN' message is displayed (slow down).
Range switching order (only for cars with manual transmission)
Before changing the range, the transmission must be in neutral, and the desired gear is selected only after the range change is completed. During a range change, the driver should not attempt to move the transmission out of neutral. When the lever is moved out of neutral, the range change stops and can only be completed after the driver has reset the neutral position. This prevents damage to the transfer case mechanism.
The speed limit for shifting while driving in manual transmission vehicles is lower than the speed limit for automatic transmission vehicles and is approximately 20 km/h for high-to-low shifting and 60 km/h for low-to-high range shifting. The lower limits are set to prevent damage to the vehicle if the driver tries to select too low a gear after changing the range.
Transfer case control scheme
NOTE: A = wired; D = CAN bus
| Item name | Spare part number | Description |
| 1 | - | Diagnostic connector |
| 2 | - | Dashboard |
| 3 | - | Terrain Response™ |
| 4 | - | Range select switch |
| 5 | - | Selected Range LED |
| 6 | - | transmission control module (TCM) |
| 7 | - | The engine control unit (ECM) |
| 8 | - | Transfer box motor |
| 9 | - | temperature sensor |
| 10 | - | Hall sensors (for speed and direction) |
| 11 | - | Transmission Position Sensor Manual Transmission |
| 12 | - | Output shaft speed sensor |
| 13 | - | Fuse 24 of the ignition power supply circuit |
| 14 | - | Fusible link of a chain of a constant supply of the accumulator battery |
| 15 | - | Egnition lock |
| 16 | - | Electromagnet |
| 17 | - | Transfer case control module |
| 18 | - | Selected Range Sensor |
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