2010 JAGUAR XFR start stop button

DTC Description Possible Cause Action B108A12 Start Button
Start/Stop switch analogue
input circuits 1 or 2 - short to
power Refer to the electrical circuit diagrams and check
Start/Stop switch analogue input circuits 1 and 2 for
short to power B109512 Wiper On/Off Relay
Wiper On/Off relay control
circuit - short to power Carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check wiper
On/Off relay control circuit for short to power B109514 Wiper On/Off Relay
Wiper On/Off relay control
circuit - short to ground, open
circuit Refer to the electrical circuit diagrams and check wiper
On/Off relay control circuit for short to ground, open
circuit B109612
Wiper High/Low
Relay
Wiper Fast/Slow relay control
circuit - short to power Carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check wiper
Fast/Slow relay control circuit for short to power B109614
Wiper High/Low
Relay
Wiper Fast/Slow relay control
circuit - short to ground, open
circuit Refer to the electrical circuit diagrams and check wiper
Fast/Slow relay control circuit for short to ground, open
circuit B109712
Heated Windshield
Relay
Heated windshield relay control
circuit - short to power Carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check heated
windshield relay control circuit for short to power B109714
Heated Windshield
Relay
Heated windshield relay control
circuit - short to ground, open
circuit Refer to the electrical circuit diagrams and check heated
windshield relay control circuit for short to ground, open
circuit B10A612 Main Light Switch
Master light switch signal from
roof header console circuit -
short to power Refer to the electrical circuit diagrams and check master
light switch signal from roof header console circuit for
short to power B10A623 Main Light Switch
Master light switch signal from
roof header console signal
stuck low. Switch is read as ON
for too long a time Carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check master
light switch signal from roof header console for short to
ground B10AD09 Rain Sensor
Component failures Carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system.
Suspect the rain/light sensor, check and install a new
sensor as required B10AD11 Rain Sensor
Rain/light sensor power circuit -
short to ground Carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check rain/light sensor power circuit for short to ground B10AD96 Rain Sensor
Component internal failure Suspect the rain/light sensor, check and install a new
sensor as required B10E511
PCM Wake-up
Signal
ECM wake-up signal circuit -
short to ground Refer to the electrical circuit diagrams and check ECM
wake-up signal circuit for short to ground B10E512
PCM Wake-up
Signal
ECM wake-up signal circuit -
short to power Refer to the electrical circuit diagrams and check ECM
wake-up signal circuit for short to power B10E513
PCM Wake-up
Signal
ECM wake-up signal circuit -
open circuit Refer to the electrical circuit diagrams and check ECM
wake-up signal circuit for open circuit B10F111 Key In Switch
Keyless vehicle module, key IN
status circuit - short to ground Carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check keyless
vehicle module, key IN status circuit for short to ground B10F112 Key In Switch
Keyless vehicle module, key IN
status circuit - short to power Refer to the electrical circuit diagrams and check keyless
vehicle module, key IN status circuit for short to power B10F113 Key In Switch
Keyless vehicle module, key IN
status circuit - open circuit Refer to the electrical circuit diagrams and check keyless
vehicle module, key IN status circuit for open circuit

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

7 Low frequency antenna - front 8 Low frequency antenna - center 9 Low frequency antenna - rear 10 Radio frequency receiver 11 Start control module 12 CJB (central junction box) 13 Instrument cluster 14 Megafuse (250 amp)
System Operation

The passive start function prevents the vehicle from being started by unauthorized persons. It does this by immobilizing the
ignition, fuel and engine crank functions. The system is automatic and requires no input from the driver.

At the request of the CJB, the keyless vehicle module prompts each of the Low Frequency (LF) antennae to output a signal. When the Smart Key is in the vehicle cabin, it detects the LF signals and responds with a Radio Frequency (RF)
data-identification signal back to the keyless vehicle module via the RF receiver.

If the data received matches that stored in the keyless vehicle module it continues the passive start process by
communicating a 'Smart Key valid’ signal to the CJB via the medium speed CAN (controller area network) bus.

Once the CJB receives the authorization and confirms a response with an internal calculation, it passes the result to the
instrument cluster on the medium speed CAN bus.
Before the instrument cluster sends a mobilization signal to the ECMit will exchange encrypted data with: The electric steering lock mechanism to authorize unlocking the steering column.
The RJB to authorize fuel pump operation. Once the RJB receives the authorization and confirms the response with an internal calculation, it will enable the FPDM (fuel pump driver module).
The CJB to authorize the ignition status. If the drive selector is in the park position and the driver presses the brake
pedal and simultaneously presses the start/stop switch, the CJB interprets this as an engine crank request. Before the
engine crank request is allowed, the CJB compares a brake pressure signal received from the ABS module. The brake pressure signal is compared to an internally stored threshold value within the CJB. If the signal is greater than the
stored threshold value, a crank request signal is sent to the ECM on the high speed CAN bus.

Once these factors have been confirmed, and the vehicle is in 'Park', the engine can be started by pressing the brake pedal and
the Stop/Start button simultaneously.
NOTES:


If the keyless vehicle module fails to locate the Smart Key, the message 'SMART KEY NOT FOUND PLEASE INSERT IN
SLOT' will appear in the instrument cluster message center. When inserted the start control module will read the transponder
within the Smart Key. If the transponder identification is valid, authorization will be transmitted to the instrument cluster on
the LIN (local interconnect network) bus.


When the vehicle is delivered from the factory the passive start function is inhibited. In this condition the vehicle can
only be started by placing the Smart Key in the start control module. The system should be switched on during the Pre-Delivery
Inspection (PDI) using the Jaguar approved diagnostic system. For additional information, refer to the PDI Manual.

To ensure optimum long term reliability of the smart key the battery must be replaced with a brand new, unused battery. If a
used battery is installed the "SMART KEY BATTERY LOW" message may not be cleared. To avoid contamination of the contacts
the battery should be removed from its packaging and installed into the smart key while wearing gloves. To confirm that the
replacement battery is working correctly press the unlock button twice while holding the smart key outside the vehicle, then
enter the vehicle with the smart key, press the start button and confirm that the "SMART KEY BATTERY LOW" message is not
displayed.



Start Control Module Component Description

The start control module is used if the keyless vehicle module is unable to authorise the Smart Key.

If the keyless vehicle module is unable to identify the Smart Key, for example if the Smart Key battery voltage is low or there
is local RF interference, the transponder within the Smart Key can be read in the conventional manner. The driver will be
alerted to this by a chime and a message in the instrument cluster message center 'SMART KEY NOT FOUND PLEASE INSERT IN
SLOT'.

Once inserted the start control module will read the transponder within the Smart Key. If the transponder identification is
valid, authorization will be transmitted to the instrument cluster on the LIN bus.


NOTE: Inserting the Smart Key into the start control module will not charge the Smart Key battery. The battery is
non-chargeable and must be replaced if defective.

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.

7 RH accelerometer 8 LH accelerometer 9 RJB (rear junction box) 10 BJB (battery junction box)
System Operation
The pedestrian protection system is operational when the vehicle is traveling at speeds between approximately 20 km/h (12.4
mph) and 45 km/h (28 mph). A vehicle speed signal is received by the pedestrian protection system control module over the
high speed CAN bus.
The system is able to determine if contact is made with a pedestrian or another object, such as a traffic cone, using signals
from accelerometers mounted behind the front bumper. When the system determines contact is made with a pedestrian it fires
the actuators to lift the rear of the hood approximately 130 mm within 35 ms of the 'fire' signal.

When an impact condition is registered, the pedestrian protection system control module outputs an impact signal on the high
speed CAN bus. This signal is used by the RJB to initiate the hazard warning lamps. If this occurs, the hazard warning lamp switch is disabled for the remainder of the current ignition cycle.

If the pedestrian protection system control module detects a fault with the system, it outputs a message on the high speed
CAN bus to the instrument cluster message center. On receipt of this, the message center will display the message 'CHECK PEDESTRIAN SYSTEM'.

The pedestrian protection system control module also stores the VIN (vehicle identification number). If a new control module
is fitted to the vehicle the Jaguar approved diagnostic tool must be used to program the unit with the vehicles VIN.
When the vehicle is delivered from the factory the pedestrian protection system is in a 'safe' plant mode. Normal operating
mode should be activated using the Jaguar approved diagnostic tool during the Pre-Delivery Inspection (PDI) prior to delivery
to the customer. For additional information, refer to the PDI manual.

If any damage is caused to the front of the vehicle, be it cosmetic or structural, repairs must be carried out in line with the
processes contained in the workshop manual. Failure to carry out the correct repair process could compromise operation of the
pedestrian protection system. Refer to GTR for the latest information.

The vehicle must be left for 1 minute after disconnecting the battery before any work can be carried out on the pedestrian
protection system.

Failure Mode Detection

In service, if any fault is detected, or any part of the system is recognized as not being present, the message center displays
the warning 'Check Pedestrian System'.

The bonnet deployment actuators are non-serviceable components, and if they must be replaced due to a fault, or due to
having been deployed, or following any other accident, their barcode labels must be read and recorded in the service database
against the vehicle VIN for security purposes.

After deployment of the pedestrian protection system, the vehicle must be stopped as soon as it is safe to do so. The hazard
warning lamps will be activated and can only be switched off by pressing the engine START/STOP button to turn the engine off
and on again. A warning message 'CHECK PEDESTRIAN SYSTEM' will appear on the message center and the vehicle should be
transported to the nearest dealer/authorised repairer. The vehicle must not be driven when the bonnet has been deployed.


NOTE: If the warning message 'CHECK PEDESTRIAN SYSTEM' appears in the message center when the bonnet has not
been deployed, the vehicle should be taken to the nearest dealer/authorised repairer immediately. It can be driven.

If any significant damage occurs to the front bumper it should be inspected by a dealer/authorised repairer as soon as
possible.



CONTROL MODULE Component Description

The control module is mounted below the hood release lever behind the side trim in the left hand front footwell.

The deployment signal is received from the pedestrian protection system control module. The second-generation system
adopted for XF is all-new to Jaguar and, although similar, differs from that introduced on XK by having an accelerometer-based
sensing system rather than a contact-sensing system. The accelerometer-based system is supplied by Bosch. Mounted very
close to the skin of the bumper, it examines the characteristics of vibration waves caused by impact. Its response time is
quicker, because it does not rely on the front of the bumper being loaded. It uses the 'saved' time to make more complex
decisions, and so has fewer error states. The speed of vehicle and the length of the bonnet define the time available to get
the bonnet into its deployed and stabilized position. It is possible, therefore, to create a time-line counting back from the
predicted moment of head impact to the time when the deployment signals need to be sent. That in turn defines a time from
first contact to decision time.
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