Jaguar XJ (X350). Manual — part 288

Description and operation

Steering Column

Upper column

Item

Part Number

Description

1

—

Steering column lock actuator

2

—

Steering column

3

—

Telescope solenoid

4

—

Tilt solenoid

5

—

Tilt/Telescopic motor

Lower column

The steering lock actuator is secured to the lower part of the adjustable steering column and consists

of a locking pin and an electric motor. The electric motor has a hall effect sensor which detects lock

and unlock states, this makes the lock actuator more sensitive for the time taken to lock and unlock.

A bus controller chip has also been added to cope with the high integrity bus traffic. The column is

locked and unlocked by inserting and removing the ignition key respectively. The instrument cluster

provides control for the column adjustment by means of a power tilt/telescope switch on the side of

the steering column lower shroud, memory recall and easy entry or exit.

The upper column is a tilt and telescopic type consisting of one electric motor to tilt and telescope

the steering column. The steering column has 50 mm of telescopic movement and 5 degrees of tilt

adjust. The power tilt and telescope function allows the driver to manually set the steering column

position by using the power tilt/telescope switch, regardless of the ignition switch position. When

moving the column, the switch will only allow one directional movement at a time.

Crash load absorption is provided by a unique peeling tube mechanism. If an accident occurs and the

driver is not wearing a safety belt the steering column must be replaced. The steering column must

also be replaced if the air bag is deployed.

The upper steering column will need to be calibrated if the column or the instrument cluster is

renewed. Calibration is carried out using the Jaguar approved diagnostic system. No routine

maintenance of the steering wheel and driver airbag is required. Any setting of steering wheel for

misalignment must be achieved by adjusting the tie rods.

The lower steering column has the advantage of having a swing link mechanism, this is fitted to

provide movement to occur in the steering system when travelling over bumps and obstacles. This

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system improves the driver feel of the steering system as vibrations through the suspension

assembly are greatly decreased.

The lower steering column swing link will need to be calibrated if the lower slider pinch bolt has been

released or removed and if the lower column is replaced. No routine maintenance of the swing link

or lower universal joint is required as these components are sealed with a special lubricant and high

temperature resistant seals.

Diagnosis and testing

Steering Column

For additional information, refer to

<<211-00>>

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