Symptom Possible Causes Action
Wear in steering gear tie-rod end ball joints
Check and install new tie-rod
ends as required, refer to the
new module/component
installation note at the top of
the Symptom Charts
NOTE: Inner ball joint wear is rare. The steering
gear installed to all Jaguar vehicles has a spring
loaded pinion to ensure the correct level of
engagement between the rack and pinion. This play
is optimized with the steering gear in the central
position and should not be confused with inner ball
joint wear. Check for vertical motion in the inner ball
joint with the steering gear in the central position.
Wear in steering gear inner ball joints
Check and install new steering
gear as required, refer to the
new module/component
installation note at the top of
the Symptom Charts
Wear in suspension ball joints/bushings
Check and install new
components as required
Veer under braking
Steering gear not correctly adjusted
CAUTION: DO NOT attempt to
adjust the steering gear yoke. Failure to
follow this instruction will invalidate the
steering gear warranty
Check and install a new steering
gear as required, refer to the
new module/component
installation note at the top of
the Symptom Charts
Contamination of brake pads and discs
Check and rectify the source of
the contamination and install
new brake pads and discs as
required, refer to the new
module/component installation
note at the top of the Symptom
Charts
Seized front brake caliper slide pins or piston
Damaged brake discs
Check and rectify sticking slide
pins and install new calipers as
required, refer to the new
module/component installation
note at the top of the Symptom
Charts
Check and install new brake discs
as required, refer to the new
module/component installation
note at the top of the Symptom
Charts
Vehicle pulls to one side
when driving on a level
surface
Uneven tire wear
Incorrect tire pressure
For information on diagnosis of
uneven tire wear.
REFER to: Suspension System (204-00 Suspension System -
General Information, Diagnosis
and Testing).
Check and adjust tire pressures
as required.
REFER to: Specifications (204-04 Wheels and Tires,
Specifications).
Incorrect geometry settings
NOTE: Dealerships must keep a
copy of the BEFORE and AFTER
geometry figures with job card for future
reference
Check and adjust geometry as
required. REFER to: (204-00
13 Bypass valve 14 SC 15 Gasket 16 RH intake manifold 17 M08 x 30 mm crew (3 off) 18 M08 x 50 mm screw 19 N.H. pad 20 M6 x 15 mm screw (4 off) 21 M08 x 45 mm screw (4 off) 22 RH charge air cooler 23 M08 x 150 mm screw Supercharger
The SC is a Roots blower with high angle helix rotors driven at 2.1 x engine speed by the secondary belt of the accessory drive.
The two rotors of the SC are contained in a housing. The ends of the rotors are supported in bearings in the front cover and the bearing plate. A rear cover seals the bearing plate and incorporates a filler/level plug for lubricant. A pulley transfers power
from the accessory drive to the shaft of one of the rotors.
A pneumatic actuator on the front cover is attached to a by-pass valve in the housing. The bypass valve regulates a flow of air
from the outlet of the SC back to the inlet side of the rotors, to control the outlet pressure of the SC. Hoses connect the pneumatic actuator to the throttle T-piece of the air ducts, upstream of the electric throttle, and to the front cover, downstream
of the electric throttle. A lever connects the actuating rod of the pneumatic actuator to the shaft of the bypass
valve. A screw in the front cover limits movement of the lever in the closed direction to allow calibration of the SC output. The front cover also incorporates:
The SC air inlet and mounting face for the electric throttle. A connector stub for the part load breather.
A MAP (manifold absolute pressure) sensor.
A connector stub for a hose from the EVAP (evaporative emission) canister purge valve.
Intake Manifolds
Each intake manifold is attached to the SC with three screws and a bolt. Two dowels ensure correct alignment of each intake manifold. The RHD (right-hand drive) intake manifold incorporates a connection port for the noise feedback system. The LH intake manifold incorporates:
A connector stub for the brake vacuum system.
A MAPT (manifold absolute pressure and temperature) sensor.
