Land Rover Lesson 2 Auto Trans Coolingine Rover Manual

Fault DescriptionComponent/SignalP Code
Signal voltage too smallEPRS 6P276200
Short circuit to power supplyEPRS 6P276300
Short circuit to groundEPRS 6P276400
CONTROLLER AREA NETWORK
(CAN)
The high speed CAN broadcast bus network is used to
connect the powertrain modules. The CAN bus is
connected between the following electronic units:
High Speed CAN Bus
•TCM
•Instrument cluster
•Air suspension module
•Steering angle sensor
•Rear differential module
•Centre console switch pack
•Electric park brake module...

sport or manual mode and the selector lever is moved
to the D position, normal mode is automatically
resumed.
Sport Mode
The sport mode operates in high range only and provides
enhanced acceleration and responsiveness. In sport mode
the TCM uses shift maps which allow the transmission
to downshift more readily, hold gears for longer at
higher engine speeds, and limits the transmission to the
first five gears (6th gear is not used).
Sport mode is selected by moving the selector lever to
the left into the...

HDC Mode
The HDC mode assists the ABS module in controlling
the downhill speed of the vehicle. When HDC is selected
on, the ABS module selects the most appropriate gear
for the descent, to maximise engine braking.
Cruise Mode
When speed control is activated, the TCM receives a
cruise active message on the CAN bus. The TCM
activates a speed control map which prevents locking
and unlocking of the torque converter clutch and
minimises up and down shifts.
Hill Mode
Hill mode is initiated by the TCM when the...

Cooling Strategy
The purpose of the cooling strategy is to reduce engine
and transmission temperatures during high load
conditions, when towing a trailer for example. Under
these conditions the engine and transmission may
generate excessive heat.
If the transmission fluid temperature increases to 125ºC
(257ºF) or higher, the TCM employs the cooling
strategy. The message TRANSMISSION OVERHEAT
is displayed in the message center.
The strategy uses a specific shift and torque converter
lock-up clutch map....

performance in sand by holding onto gears longer and
downshifting more readily. This mode is fully integrated
with the hill mode to further enhance performance
during ascents.
Rock Crawl
When the driver selects the Terrain Response rock crawl
special program, which is only available with the
transfer box in low range, the TCM uses a specific shift
map which maximises torque delivery at slow speeds
associated with this type of terrain.
TRANSMISSION FAULT STATUS
If the TCM detects a fault with the...

CONTROL DIAGRAM
NOTE: A = Hardwired;  D= High Speed CAN Bus
(G421157) Technical Training300
Lesson 2 – PowertrainAutomatic Transmission 

Diagnostic socket1
Mechatronic Valve (including TCM, sensors and
solenoids)
2
Instrument cluster3
Engine Control Module (ECM)4
Selector indicator5
Selector indicator6
Fusible link 7E (50A)7
Fuse 43P (5A)8
Selector lever assembly9
Fuse 33P (5A)10
Ignition switch11
Fusible link 10E (30A)12
Fuse 27P (5A) – Ignition feed13
Fuse 4E (10A) – Permanent feed14
Starter relay15
Automatic TransmissionLesson 2 – Powertrain
301Technical Training (G421157) 

New Product Introduction
2005.0 Discovery 3
Description and Operation
Technical Training en 05/2004 

To the best of our knowledge, the illustrations, technical information, data and descriptions in this issue were correct at the time
of going to print. The right to change prices, specifications, equipment and maintenance instructions at any time without notice
is reserved as part of our policy of continuous development and improvement for the benefit of our customers.
No part of this publication may be reproduced, stored in a data processing system or transmitted in any form, electronic,
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PAGE
Lesson 1 – General Information
Lesson 2 – Powertrain
13Objectives....................................................................................................................................................
16Engine.............................................................................................................................................................