Range Rover Evoque: Transmission Description - Component Location
Component Location
COMPONENT LOCATION
- Auxiliary battery module
- Transmission Control Switch (TCS)
- Upshift (+) paddle switch
- Downshift (-) paddle switch
- Transmission and Gear Shift Module (GSM) breathers
- Automatic transmission
- Gear Shift Module (GSM)
- Transmission Control Module (TCM)
- Transmission fluid cooler (all markets)
- Transmission fluid cooler (hot climate markets)
Overview
OVERVIEW
The AW F21 automatic transmission is a 6 speed, electronically controlled
unit manufactured by Aisin AW in Japan. The
transmission represents the latest in automatic transmission technology for a
transverse, AWD (all-wheel drive) unit. The
transmission features lock-up slip control, 'CommandShift' functions and
automatic and driver selectable modes to give
the optimum on and off road performance.
The transmission is controlled by a TCM (transmission control module) which
contains software to provide operation as a
semi-automatic 'CommandShift' transmission and a Gear Shift Module (GSM). The
GSM is a rotary actuator which converts
driver selections for P, R, N, D and S on the rotary TCS (transmission control
switch) into rotary movement of the
transmission selector shaft allowing the system to operate as a 'shift by wire'
system, with no mechanical link to the
transmission for drive selections.
The TCM allows the transmission to be operated as a conventional automatic unit
by selecting P, R, N, D, S on the TCS.
Rotation of the TCS to the 'S' position puts the transmission into electronic
'Sport' mode. Operation of the steering wheel
mounted + or - paddle switches puts the transmission into electronic manual 'CommandShift'
mode.
Refer to: External Controls (307-05 Automatic Transmission/Transaxle External
Controls - Vehicles With: AWF21 6-Speed
Automatic Transmission, Description and Operation).
The transmission system uses an auxiliary battery module which powers a failsafe
system to allow the engagement of
'Park' in the event of vehicle power failure.
The AW F21 transmission has the following features:
- Designed to be maintenance free
- Transmission fluid is fill for life
- The torque converter features a controlled slip feature with
electronically regulated lock-up control on gears 2 to 6
- Shift programs controlled by the TCM
- TCM has an adaptive capability to ensure efficient gear shift quality
throughout the service life of the transmission
- Diagnostics available from the TCM and the GSM via the high speed CAN
(controller area network) bus.
READ NEXT:
Control Diagram
NOTE: A = Hardwired; D = High Speed Controller Area Network (CAN) bus; O =
Local Interconnect Network ( LIN)
Battery
Battery Junction Box (BJB)
Engine Control Module (ECM)
Centr
TORQUE CONVERTER
Torque converter housing
Lock-up clutch
Turbine
Impeller
Stator
Fluid pump
Input shaft
The torque converter is the coupling element between the engine and the
transmission
DRIVE CLUTCHES
Multiplate Drive or Brake Clutch - Typical
Input shaft
Main pressure supply port
Piston
Cylinder - External plate carrier
Clutch plate assembly
Baffle plate
Diaphragm spring
O
SEE MORE:
Road or rolling road testing may be carried out for various reasons and a
procedure detailing pre-test checks, through
engine starting and stopping, pre-driving checks, on-test checks to final checks
on completion of the test are given.
Unless complete vehicle performance is being checked, the fu
Ride and Handling Optimization AWD
COMPONENT LOCATION
Terrain Response switchpack and control module
OVERVIEW
The Terrain Response system allows the driver to select a program which aims
to provide the optimum settings for
traction and performance for the prevailing terrain conditions. The sys
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