General

STEERING

DESCRIPTION AND OPERATION

57-9

Description

General
Rack and pinion steering is introduced on Range Rover for the first time. A ZF power assisted steering rack is fitted 
on the front subframe. The rack is a conventional end take-off rack and pinion power assisted unit with the addition 
of ZF Servotronic 2 assistance.

Servotronic 2 adds electronic control and speed sensitive steering to the steering rack. The Servotronic 2 feature 
provides easy and comfortable steering operation when parking, improved 'road feel' at increased road speeds and 
adds an integrated, positive centre feel feature which optimises steering wheel torque during high speed driving.

The Servotronic 2 system is controlled by software which is incorporated into the Body Control Unit (BCU). The 
software responds to steering torque inputs and road speed signals and controls the assistance via a transducer valve 
located on the steering rack valve.

The steering column features fully electrical adjustment for tilt and reach. On vehicles fitted with memory seats, the 
steering wheel position control is incorporated into the memory seat ECU.

The column also features an electronically controlled steering lock. The lock is operated when the ignition switch 
senses that the correct key has been inserted. An ECU, located inside the steering column, controls a motor operated 
lock, releasing the steering lock when appropriate.