2010 JAGUAR XFR power steering

DTC Description Possible Causes Action Write target SID
synchronisation error
following re-programming
Noise/EMC related error B100A63
Fuel Pump
Authorisation
RJB fault
Low speed CAN fault
Instrument cluster fault
Low battery voltage <9V Check power and ground supplies to RJB and instrument cluster.
Check CAN communications between RJB and instrument cluster.
Check battery is in fully charged and serviceable condition, refer
to the battery care manual B102612
Steering Column
Lock
Steering column lock
ground circuit - short to
power Refer to the electrical circuit diagrams and check steering column
lock ground circuit for short to power B108783 LIN Bus "A"
The checksum of the
received LIN frame is
incorrect Check the battery monitoring system and rear parking aid system
for DTCs and refer to relevant DTC Index B108786 LIN Bus "A"
The header of the LIN
message received is
incorrect Carry out any pinpoint test associated with this DTC using the
manufacturer approved diagnostic system. Check the battery
monitoring system and rear parking aid system for DTCs and
refer to relevant DTC Index B108788 LIN Bus "A"
Battery monitoring
system LIN circuit - short
to ground, power Carry out any pinpoint test associated with this DTC using the
manufacturer approved diagnostic system. Refer to the electrical
circuit diagrams and check battery monitoring system LIN circuit
for short to ground, power B108A23 Start Button
Start/Stop switch digital
input signal circuit -
stuck low Carry out any pinpoint test associated with this DTC using the
manufacturer approved diagnostic system. Refer to the electrical
circuit diagrams and check Start/Stop switch digital input signal
circuit for short to ground B10A111 Trailer Tow
Detection
Trailer tow detection
digital input circuit -
short to ground Carry out any pinpoint test associated with this DTC using the
manufacturer approved diagnostic system. Refer to the electrical
circuit diagrams and check trailer tow detection digital input
circuit for short to ground B10AF12 Blower Fan Relay
High Side output not
driven - Diagnosis
feedback indicates output
is short to power Refer to the electrical circuit diagrams and check blower motor
supply circuit for short to power B10AF14 Blower Fan Relay
High Side output not
driven - Diagnosis
feedback indicates output
is short to ground, open
circuit Refer to the electrical circuit diagrams and check blower motor
supply circuit for short to ground, open circuit B10AF93 Blower Fan Relay
High Side output not
driven - Diagnosis
feedback indicates output
is at open load or short
to power Carry out any pinpoint test associated with this DTC using the
manufacturer approved diagnostic system. Refer to the electrical
circuit diagrams and check blower motor supply circuit for short
to power, open circuit B10DD11 Airbag Deployed
Airbag deployed digital
input signal circuit - short
to ground Carry out any pinpoint test associated with this DTC using the
manufacturer approved diagnostic system. Refer to the electrical
circuit diagrams and check airbag deployed digital input signal
circuit for short to ground B10DD15 Airbag Deployed
Airbag deployed digital
input signal circuit - short
to power, open circuit Carry out any pinpoint test associated with this DTC using the
manufacturer approved diagnostic system. Refer to the electrical
circuit diagrams and check airbag deployed digital input signal
circuit for short to power, open circuit B10DD38 Airbag Deployed
Signal frequency incorrect Check the RCM for related DTCs and refer to the relevant DTC
Index B10DE11
Low Fuel Warning
Switch
Diesel run-dry switch
analogue input circuit -
short to ground Carry out any pinpoint test associated with this DTC using the
manufacturer approved diagnostic system. Refer to the electrical
circuit diagrams and check diesel run-dry switch analogue input
circuit for short to ground www.JagDocs.com

Instrument cluster
High speed CAN
(controller area network) bus Receives data from other vehicle systems to provide
information to the driver. Also functions as the gateway for the bus systems. Instrument panel. Steering column
High speed CAN bus Controls the locking and unlocking of the steering
column. Upper steering column. Diagnostic socket
High speed CAN bus Allows the transfer of vehicle information using a
Jaguar approved diagnostic system or other diagnostic tool. In the lower instrument panel
on the driver's side, adjacent
to the start control module. RCM (restraints control module) High speed CAN bus Controls the deployment of the supplementary
restraint components. At rear of floor console. TCM (transmission
control module) High speed CAN bus Controls automatic transmission operation.
Inside the transmission and
accessible via the fluid pan. ECM (engine control
module) High speed CAN bus Controls engine management and fuel system
operation. Rear of the engine
compartment on the
bulkhead. ABS (anti-lock brake
system) High speed CAN bus Controls all aspects of the braking system
Rear of the engine
compartment on the
bulkhead. Headlamp leveling
module High speed CAN bus Controls the static dynamic headlamp leveling
function. In the lower instrument panel, behind the glovebox. Occupant classification
system control module (NAS only) High speed CAN bus Detects when a passenger is in the front passenger
seat and can determine their size and weight. Below the front passenger
seat. Adaptive damping
control module High speed CAN bus Controls the adjustment of the dampers.
Below the front passenger
seat. Electronic Parking Brake
(EPB) module High speed CAN bus Controls the application and release of the electronic
parking brake. In the luggage compartment,
above the RH (right-hand)
wheel arch. Pedestrian protection
module High speed CAN bus Controls and monitors the pedestrian protection system. LH (left-hand) 'A' pillar. Adaptive speed control
module High speed CAN bus Controls the vehicle's road speed in relation to other
vehicles when in speed control mode. Behind the instrument panel
on the driver's side. Electronic transmission
selector High speed CAN bus Allows the driver to electronically select the required
automatic transmission mode. Transmits driver
selections to the TCM. In the floor console. Jaguar Drive control
module High speed CAN bus Controls the Jaguar Drive function and communicates
with other system modules. Integral with the electronic
transmission selector
software in the floor console. CJB
Medium speed CAN bus Controls body functions and power distribution. On RH 'A' pillar. Diagnostic socket
Medium speed CAN bus Allows the transfer of vehicle information using a
Jaguar approved diagnostic system or other diagnostic tool. In the lower instrument panel
on the driver's side, adjacent
to the start control module. Passenger door module
Medium speed CAN bus Controls window and locking functions. In the front passenger door. Parking aid module
Medium speed CAN bus Controls the parking aid system.
In the LH side of the luggage compartment, adjacent to
the keyless vehicle module. www.JagDocs.com

Module Network System Function Vehicle Location
Driver's seat module Medium speed CAN Controls driver's seat positioning and also memory Below the driver's seat. bus functions of other personalized functions.
Instrument cluster Medium speed CAN Receives data from other systems to provide driver In the instrument panel. bus information.
Driver's door module Medium speed CAN Controls window and locking functions. In the driver's door. bus
ATC (automatic Medium speed CAN Contains controls for the heating and air On the end of the air
temperature control)
module bus conditioning systems.
conditioning evaporator and
blower assembly.
Information control Medium speed CAN Contains controls for the entertainment systems. In the instrument panel module bus
below the integrated control
panel.
Integrated control Medium speed CAN Contains controls for the entertainment systems and In the instrument panel. panel bus
gateway between audio system and other vehicle
systems.
Front seat climate Medium speed CAN Controls the temperature requirements of the driver Below the RH front seat. control module bus and passenger front seats.
LH blind spot Medium speed CAN Controls the operating parameters of the system and Behind the outer part of the monitoring module bus provides driver indications and fault monitoring.
rear bumper, rearward of the
rear wheel.
RH blind spot Medium speed CAN Controls the operating parameters of the system and Behind the outer part of the monitoring module bus provides driver indications and fault monitoring.
rear bumper, rearward of the
rear wheel.
Keyless vehicle module Medium speed CAN Allows the vehicle to be opened and closed without In the LH side of the luggage bus the use of a key.
compartment, adjacent to
the parking aid module.
RJB (rear junction box) Medium speed CAN Controls body functions and power distribution. RH of luggage compartment. bus
Tire pressure Medium speed CAN Monitors the vehicle tires to warn of deflation. Below the rear of the floor monitoring control
module bus console.
TCM K Bus Data transfer between TCM and diagnostic socket. NOTE: Only fitted to early build vehicles. Inside the transmission and
accessible by removal of the
fluid pan.
Driver's side rear door
module LIN (local
interconnect
network) Controls window and locking operation. In the driver's side rear door.
Passenger side rear
door module LIN Controls window and locking operation. In the passenger side rear
door.
Driver's door module LIN Memory/adjustment functions for seat, steering
column and mirrors and door security functions. In the driver's door.
Passenger front door
module LIN Memory/adjustment functions for seat, steering
column and mirrors and door security functions. In the passenger door.
Driver's door switches LIN Transmit driver selections to the driver's door
module. In the driver's door panel.
ECM LIN Receives a load signal from the generator. In the engine compartment
on the bulkhead.
Generator LIN Provide load signal to the ECM. On the LH side at the front of the engine.
Driver's seat module LIN Control position of driver's seat. Below the driver's seat on
the floor pan.
Driver's seat switches LIN Provide driver selection inputs to the driver's seat
module. On the outside of the trim
panel on the driver's seat.
Air quality sensor LIN Measures quality of air entering the vehicle interior. At the front of the vehicle,
behind the air intake grill.
Windshield (defrost)
stepper motor LIN Moves flaps within the heater assembly to direct air
flow to the windshield. On the heater assembly.
Face/feet stepper motor LIN Moves flaps within the heater assembly to direct air
flow to instrument panel vents and/or footwell. On the heater assembly.
LH temperature blend
stepper motor
RH temperature blend
stepper motor LIN Moves flaps within the heater assembly to control
temperature in LH side footwell.
LIN Moves flaps within the heater assembly to direct air
flow to RH side footwell. On the heater assembly.
On the heater assembly.
Electric booster heater LIN Controls operation of the electric booster heater. Inside the heater assembly.
LH outer face level vent LIN Controls the operation of the face level vent stepper In the instrument panel.
motor.
LH inner face level vent LIN Controls the operation of the face level vent stepper In the instrument panel.
motor.
RH inner face level vent LIN Controls operation of the face level vent stepper
motor.
RH outer face level vent LIN Controls operation of the face level vent stepper
motor. In the instrument panel.
In the instrument panel.
ATC module LIN Controls operation of the climate system functions. In the instrument panel.
Steering wheel audio
switches LIN Converts analogue signals from steering wheel
switches into digital messages. On the steering wheel.

Module Network System Function Vehicle Location
Steering wheel
clockspring LIN Passes digital messages from the steering wheel
audio switches to the instrument cluster. Behind the steering wheel,
on the upper steering
column.
Instrument cluster LIN Receives digital signals from other vehicle systems. On the driver's side of the
instrument panel.
Battery backed sounder LIN Activated by CJB when alarm trigger is received. In the LH side of the engine compartment, near the
bulkhead.
CJB LIN Controls body functions and power distribution. On the RH 'A' pillar.
RJB LIN Controls body functions and power distribution. On the RH of the luggage compartment.
Battery monitoring
system module

Intrusion detection
module LIN Monitors the condition and charge of the vehicle
battery.

LIN Detects movement in the vehicle interior and
activates the anti-theft system. On the vehicle battery
positive terminal in the
luggage compartment.
In the front overhead
console.
Rain/light sensor LIN Detects ambient light levels and moisture on the
windscreen for operation of the automatic
headlamps and wiper systems.
Start control module LIN Used to identify the Smart Key - component of the
keyless start system.
Rear view camera LIN Passes digital images data from the rear view
camera to the RJB On the inside of the
windshield behind the interior
rear view mirror.
In the lower instrument panel
on the driver's side.
In the luggage compartment
lid trim finisher.
Driver's window switch LIN Controls operation of the driver's window. In the driver's door trim
panel.
Electronic transmission
selector LIN Sends selector position to the TCM. In the floor console. TCM LIN Receives selector position information to control the Inside the transmission and


Information control
module

Media Oriented
System Transport
(MOST) transmission.

Contains controls for the entertainment system and
gateway between audio system and other vehicle
systems. accessible by removal of the
fluid pan.
In the instrument panel
below the integrated control
panel.
Integrated control
panel MOST Contains controls for the entertainment system. In the instrument panel.
Digital Audio Broadcast MOST Receives digital radio broadcasts. In the LH side of the luggage (DAB) receiver (SDARS
NAS only)
Bluetooth® phone
module compartment, above the
keyless vehicle module.
MOST Controls operation of the Bluetooth® phone system. Below the LH front seat, adjacent to the portable
audio module.
Amplifier/tuner MOST Provides amplification for the entertainment systems In the LH side of the luggage and reception of radio RF broadcasts.
Navigation computer MOST Reads map data from a DVD (digital versatile disc)
to calculate and display visual route guidance
information via the TSD and audible guidance via the
amplifier to the driver. compartment.
In the LH side of the luggage compartment.
Touch Screen Display
(TSD) MOST Provides the driver interface to the entertainment,
navigation and driver personalization functions. In the center of the
instrument panel.
TV tuner MOST Controls the reception of television signals and
audio/visual inputs.
Portable Audio Module MOST Controls the auxiliary inputs for additional audio
inputs via the portable audio interface. In the LH side of the luggage compartment.
Below the LH front seat, adjacent to the Bluetooth®
phone module.
MOST diagnostic
connector MOST Allows for diagnostic fault detection of the MOST
ring. Below the air ducting in the
floor console.
Refer to Communications Network section for further details.
Refer to: Communications Network (418-00 Module Communications Network, Description and Operation).

supplies provide power for the movement motors in addition to the driver's seat switch pack. Power is only supplied to the
driver's seat module and the driver's seat switch pack when the ignition is on (power mode 6).

The driver's seat switch pack is connected to the driver's seat module by a LIN bus for the seat movement switches. Any selection for seat movement generates a message which is passed via the LIN to the driver's seat module. The seat module processes the request and operates the applicable seat function as required using the power supplies from the CJB.
Each seat motor contains a Hall position sensor. The sensor sends a feedback signal to the driver's seat module. The signal is
used for memory store and memory recall functions.

The lumbar adjustment switch on the driver's seat switch pack is wired direct to the lumbar pump and solenoids. The switch,
when moved to the inflate position for either the upper or lower inflatable cushion cell, provides a power supply to the lumbar
pump and simultaneously activates the applicable inflate solenoid valve. When the switch is released the pump stops and the
solenoid valve closes trapping the air in the inflatable cushion. When the switch is moved to the deflate position for either the
upper or lower inflatable cushion cell, power is supplied to the applicable deflate solenoid valve which opens to allow the air in
the cushion to escape. When the switch is released, the valve is closed and the remaining air in the cushion is retained.



FRONT SEATS - DESCRIPTION Component Description

The table below highlights the features available for each seating option.

Seat Type Non-Heated Heated Heated and Cooled Lumbar Support Memory 8-way Yes Optional No 2-way No 10-way Yes Optional Optional 2-way Optional (Driver's seat only) 12-way No No Yes 4-way No 16-way No No Yes 4-way Yes (Driver's seat only) Seat Heating

The 3-stage heated front seats feature 2 heater elements located in the seat cushion and a single heater element located in
the seat squab. Operation of the heated front seats is controlled by the ATC module via the TSD, information and entertainment control module and the CJB module on vehicles with heated seats. On vehicles with heated and cooled seats the operation is controlled by the TSD, information and entertainment control module and the front seat climate control
module.

The heated and cooled front seats each contain 2 climate modules; one in the cushion, one in the squab. The climate modules
contain 'Peltier' cells which are able to deliver heating and cooling based on a voltage provided by the front seat climate
control module. Each climate module also contains a fan, which blows air over the Peltier cells to distribute heated or cooled
air via liners in the seat cushion and squab. The fan is also controlled by the front seat climate control module. The TSD allows
the driver and passenger to select 3 ranges of heated or cooled ventilation; off, minimum and intermediate. Also, using the
selections on the TSD, the driver and passenger can select between full seat ventilation or squab backrest ventilation only.

Vehicles fitted with the 3-stage heated front seat option also feature a heated steering wheel.
Refer to: Steering Column Switches (211-05 Steering Column Switches, Description and Operation).
Electric Seat Adjustment

Lumbar Support

On 8, 10 and 12 way seats, a 2 way lumbar support is provided which allows the lumbar inflatable cushion to be inflated or
deflated as required. On 16 way seats, a 4 way lumbar support is fitted which comprises two separate cushion cells. The upper
and lower cells can be inflated or deflated individually allowing greater comfort adjustment for the driver and passenger.

The lumbar support comprises an inflatable cushion located in the seat squab, a pump and solenoids. The pump is activated
when the applicable seat switch is moved to the inflate position, inflating the cell(s) in the inflatable cushion. On 8 and 10
way seats, a single solenoid operated valve allows the inflatable cushion to be deflated. On 12 and 16 way seats, 4 solenoid
valves control the inflation and deflation of the upper and lower inflatable cushion cells, allowing each cell to be adjusted
individually.
Seat Motors

The head restraint motor is located in the upper section of each seat squab and is accessible by removal of the seat back. The
motor moves a cradle which is driven in a vertical motion by a rack and pinion arrangement. The cradle has the two head
restraint stems attached to it and therefore raises and lowers the head restraint as the motor moves the cradle. The motor
contains a Hall sensor which supplies positional information to the driver's seat module.

The seat slide motor is an integral component of the seat frame. The motor drives on a gear on a worm drive lead screw which
is integral with the floor rail. The lead screw has a stop at each end to limit the fore and aft seat movement.

memory positions to be stored and 'set' button with integral LED (light emitting diode). The seat, door mirror and steering
column motors have position sensors which provide feedback to driver's seat module.

Once the driver's seat, steering column and exterior mirrors have been adjusted, the vehicle is able to memorize these
settings for future use by using the following procedure:
Push the memory 'SET' button, the LED in the switch will illuminate Press the memory button 1 or 2 to memorize the current settings. The LED will extinguish, and a chime will sound to confirm that the settings have been memorized. If the ignition is on, power mode 6, the message center will display a
confirmation message.
The positions can be recalled by pressing the applicable button 1 or 2.
Stall Detection

Seat, steering column and mirror motors are deemed to have stalled if there is no change in the inputs that are received from
the corresponding feedback sensors for 200 ms (seat).

If a stall condition is detected then the drive to that motor is cancelled for the remainder of that memory operation (memory
recall) or until the switch is re-selected (manual movement).

If the motor movement has stopped due to loss of sensor feedback, either stall or sensor failure, then that motor may be
activated again, to move past the stall position, by re-selecting the appropriate switch and pressing for longer than 2 seconds.
This allows control of the motor to be maintained if sensor feedback is lost.

Upon re-selection of movement, if sensor pulses are detected then the motor will continue to be driven until the switch is
released or another stall condition is detected. If sensor feedback is not detected then the motor is only driven for 0.5 second
and then stops until the switch is released and then pressed again, when a further 0.5 second of activation is permitted, and
so on, this is known as inch mode.

For all seat motor manual movements, whenever a motor is driven and a stall occurs, the memory control module records the
position at which the stall occurred. If movement occurs beyond a stall position, then that position is erased from the control
modules memory. This will always allow movement past a previously recorded stall position once movement has been
registered beyond that position. This is the case for both manual and memory movement.
Initialization

When a replacement driver's seat module is fitted, it should be calibrated a Jaguar approved diagnostic system so that the
module can learn the seats absolute position.
Battery Monitor

If the battery voltage drops below 10.5 Volts, then the driver's seat module ignores all requests for a memory recall until the
battery voltage has reached 11.5 Volts. This will conserve as much power in the vehicle battery as possible to enable engine
cranking.

REAR SEATS - DESCRIPTION

The rear seat features a single piece cushion and a 60/40 split squab. Two latches are secured to the rear bulkhead by a pair
of M8 bolts to retain the seat squabs in the upright position. The latches can be released to fold down the individual cushions
by pulling a cable release located below the rear window parcel shelf in the luggage compartment.
ISOFIX fastening points are attached to the vehicle floor to provide secure fastening for compatible child seats.

A centrally mounted center arm rest can be folded down from the 60% squab. The arm rest contains two drinks holders.

7 Windshield washer pump 8 Wiper/Washer switch - RH (right-hand) steering column multifunction switch 9 Instrument cluster 10 CJB (central junction box) 11 BJB (battery junction box)


WINDSHIELD WIPERS System Operation

Operation of the wipers and washers is controlled by the CJB in response to driver inputs from the wiper control switch and signals from the rain/light sensor. The instrument cluster monitors the condition of the wiper/washer control switch and
transmits driver requests to the CJB over the medium speed CAN bus.
The wiper control switch is connected via hardwired connections to the instrument cluster. The instrument cluster outputs on 4
wires a reference voltage to the wash/wipe switch, the auto wiper switch, the wiper switch and the flick wipe switch. All the
switches are connected to the instrument cluster on a common ground. Each switch function is connected to ground via a
resistor or series of resistors and the instrument cluster monitors the ground signal and determines which function has been
selected. The instrument cluster then outputs the appropriate message on the medium speed CAN bus to the CJB which responds to the requested wiper function. The CJB then activates the appropriate function either directly or via relays in the EJB for the wipers and headlamp powerwashers. Speed Dependent Mode

When the wipers are operating, a vehicle speed signal received by the CJB on the high speed CAN bus is used to operate a speed dependent mode. If the wipers are in fast wipe and the vehicle speed decreases to below 2 km/h (1.2 mph), the wipers
will reduce to the normal wipe speed. When the vehicle speed increases to above 8 km/h (5 mph) the fast wiper speed
selection is restored. If slow speed is selected and the vehicle speed drops below 2km/h (1.2 mph), the wipers will operate in
the intermittent mode. When the vehicle speed increases to above 8 km/h (5 mph) the slow wiper speed selection is restored
– this feature is configurable by the dealer using the approved Jaguar diagnostic system.
Wiper Motor

The wiper motor is controlled by the CJB. The CJB is connected to a wiper motor normal/fast relay in the EJB on 2 wires. The CJB is also connected to a wiper run/park relay, also located in the EJB.
Driver requests are received by the CJB which energizes the wiper motor normal/fast relay in the appropriate mode (normal or fast wipe) and also energizes the run/park relay in the run mode by providing a ground for the relay coils. When wiper
operation is deselected by the driver, the CJB monitors a park switch which is integral with the wiper motor. On receipt of a signal from the park switch, the CJB de-energises the run/park relay, removing the power supply through the normal/fast relay, stopping the wipers in the park position on the windshield.

The wiper motor is a DC (direct current) motor which drives a gear wheel via a worm drive attached to the motor spindle. The
motor has 3 sets of brushes with one brush connected to ground. When the normal/fast relay is energized in the normal
position, a power feed is supplied to the brush directly opposite the ground brush and operates the motor at slow speed.
When the relay is energized in the fast position, a power feed is connected to the second motor brush, which is offset from the
ground brush and operates the motor at the fast speed. With power supplied through the offset brush, the current flows
through fewer motor coil windings. This results in a lower resistance to current flow to the ground brush and produces a higher
motor rotational speed.

WINDSHIELD WASHERS

The windshield washers are controlled by the CJB. A driver request for washer operation, via the wiper control switch, is passed to the instrument cluster on the LIN bus. The instrument cluster passes the message to the CJB on the medium speed CAN bus.

The CJB energizes the windshield washer pump during the up stroke of the first 2 wash/wipe cycles. This ensures that wiper fluid is pushed to the sides of the windshield and eliminates the trail of fluid which can occur if the fluid is pushed to the
bottom of the windshield. The wipers will continue for 3 more cycles, followed after a delay of 4 seconds, by a single dry wipe.


NOTE: The dry wipe feature is configurable using an approved Jaguar diagnostic system.

The operation of the washer pump on the wiper up stroke only is configurable using an approved Jaguar diagnostic system.

The washer button can be pressed and held and the wipers will operate continuously for up to 10 seconds. After this period
when the button is released, the wipers will continue for 3 more cycles, followed after a delay, by a single dry wipe. After this
period washing will be inhibited, the wipers will continue for 3 more cycles, followed after a delay, by a single dry wipe.
Reactivating the switch will recommence the wash/wipe cycle.

RESERVOIR LEVEL SWITCH

The level switch is connected directly to the CJB. The switch is operated by a float which closes contacts within the switch when the fluid level falls to below the switch level. When the contacts are closed a ground path is completed from the CJB through the switch. This is sensed by the CJB which issues a message to the instrument cluster which displays a low fluid level warning.

On vehicles with headlamp powerwash, each headlamp assembly is fitted with a headlamp powerwasher. The powerwasher is
located on the underside of the headlamp assembly. The powerwasher is located in a clip at the front of the headlamp and
secured with 2 self tapping screws to the headlamp body.

The powerwasher is a telescopic unit which extends forwards from the headlamp assembly under washer fluid pressure
supplied by the headlamp powerwash pump. When the pump pressure decreases the powerwasher is automatically retracted
back into the housing. The outer end of the powerwasher is fitted with a trim which blends the powerwasher into the headlamp
when it is not operating. The powerwasher has two washer jets which direct washer fluid under high pressure onto the
headlamp lens when the powerwasher is extended.

RAIN/LIGHT SENSOR



The rain/light sensor is located at the upper edge of the windshield, behind the interior rear view mirror. Contact between the
rain sensor and windscreen is provided via a silicon pad which is compressed during the assembly process by two locking
retaining clips either side of the sensor.
The rain/light sensor unit attaches to the windshield via two clips, which latch onto formed tags on the windshield bracket.

The sensor provides information to the CJB for the optimum wiper operation for the prevailing conditions to maintain the shield in a clear condition at all times. The rain/light sensor is an optical unit, which operates on an infrared waveband. The sensor
uses the principle of the laws of reflection on interfacing surfaces between materials with differing refraction properties.

The rain/light sensor is connected to the CJB via a LIN bus. The sensor also receives a hardwired power and ground from the CJB. The 'auto' wipers are activated when the column stalk is moved to position 1 (first position from off in the upward direction). The sensitivity of the sensor can be adjusted by rotating the sensitivity collar on the wiper column stalk in the
clockwise or counterclockwise direction. Clockwise rotation will decrease sensitivity, while counterclockwise adjustment will
increase sensitivity. An increase in sensitivity adjustment results in a single wipe of the front wiper motor.


NOTE: The rain sensor also contains a light sensor. The light sensor is used to control operation of the automatic
headlamps function.
Refer to: Exterior Lighting (417-01 Exterior Lighting, Description and Operation).
WIPER CONTROL SWITCH

The wiper control switch is located on the RH steering column multifunction switch. The switch allows selection of the following functions:

Slow wipe
Fast wipe
Auto
Flick wipe
Windshield wash and headlamp powerwash (if fitted).

All wiper functions are connected to the instrument cluster by a resistor or series of resistors within the switch. The instrument
cluster uses the returned current to determine the selected function.

WIPER SERVICE POSITION

The wiper service position allows the wipers to be parked in a position to allow easy access to the wiper blades for
replacement. The service position is initiated by pulling the RH steering column multifunction switch towards the steering wheel and pressing the start/stop button to switch on the ignition. The wipers will move and stop in a vertical position on the
windshield. The RH steering column multifunction switch can be released and the ignition switched off. The service position is terminated at the next ignition on cycle and the wipers return to their normal park position.