2010 JAGUAR XFR ABS

6 Clockspring 7 APP (accelerator pedal position) sensor 8 Electric throttle actuator 9 Brake lamp/brake test switch 10 Adaptive speed control radar sensor 11 Diagnostic socket 12 Instrument cluster 13 TCM (transmission control module) 14 Adaptive speed control module


SPEED CONTROL System Operation

The speed control system uses inputs from the brake lamp/brake test switch, the APP sensor, the ECM and the ABS module.
Speed control is operated by the driver using only the steering wheel switches. When speed control is active, the ECM regulates the PWM (pulse width modulation) signals to the fuel injectors to adjust the fuel supply as required to maintain the
set speed.

During speed control operation, the ECM controls vehicle speed by adjusting fuel injection duration and timing. When the accelerator pedal is pressed with speed control active, the ECM outputs a calculated throttle angle signal in place of the actual throttle angle signals produced by the APP sensor. The calculated throttle angle is derived from fuel demand.
The minimum set speed for speed control is 18 mph (30 (km/h). Speed control is automatically suspended if the following
conditions apply:

Vehicle speed falls below 18 mph (30 km/h)
The brake pedal is pressed
The cancel button is pressed
Neutral, park or reverse gear is selected
The difference between actual speed and the set speed is too great
If the engine speed becomes near to the red line (maximum engine speed)
If the accelerator pedal is used to accelerate beyond the set speed for too long.

ADAPTIVE SPEED CONTROL
The adaptive speed control system comprises the following components:
Adaptive speed control sensor
Adaptive speed control module
Steering wheel control switches
ECM
Electric throttle actuator
ABS module and pump Adaptive speed control warning indicator.

The adaptive speed control system uses a forward looking radar sensor to scan the road ahead, looking for objects that are
moving at a different rate to itself. When a target is identified the adaptive speed control system will monitor the time gap
between it and the target vehicle. When that gap falls below a set driver selected level the adaptive speed control system will
intervene slowing the vehicle by backing off the throttle and/ or applying the brakes, until the correct gap is attained. The
driver can chose between four gap settings, 1, 1.4, 1.8 and 2.2 seconds.
The system will detect but not react to the following:
Vehicles in the oncoming lane
Stationary vehicles
Pedestrians
Vehicles not in the same lane.

Adaptive speed control is active when the vehicle is moving. Adaptive Speed Control only functions when a set speed is
entered in normal speed control mode. The adaptive speed control system only intervenes with the set speed when it detects
a target vehicle, and then only if the minimum time gap is breached.

It is important to note that the system is intended for use in limited driving situations, does not remove control and
responsibility from the driver, and at all times can be quickly overridden. The adaptive speed control system is not a collision
warning system and will not react to stationary objects. The system does not operate below a minimum speed of
approximately 30 km/h (20 mph) since it is unsuitable for use in cities or congested traffic. The system is best suited to main
roads/ highways with gradual bends.
The ECM, throttle body and throttle control are unchanged from those used for non adaptive speed control variants.
The adaptive speed control system is based on the use of a front mounted radar sensor. The sensor transmits a 1.5° wide
beam forward of the vehicle and detects the returning signals reflected off other vehicles and objects ahead.
The 1.5° wide radar beam is mechanically scanned at a rate of 10 sweeps/second across a total arc of 15° centered on the

Automatic braking is limited to approximately 30% of full pressure (0.3G deceleration) and is intended to provide a
smooth, gradual deceleration in follow mode conditions. Harsh braking by the target vehicle or following the target
vehicle down to very low speeds or to a halt will require driver override of the brakes.
While the radar sensor detects moving and stationary targets for assessment of the environment ahead, the system
does not react to or provide any control in situations other than follow mode conditions. Stationary or slow moving
vehicles (below 10 km/h), pedestrians, objects on the road and oncoming vehicles in the same lane are not recognized.


WARNING: The adaptive speed control system is not a collision warning or avoidance system and that, other than the
limited conditions of follow mode, driver intervention will be necessary to control the vehicle speed.
In follow mode, some situations may cause target ambiguities for the detection system. These situations include:
The nearby presence of a third vehicle when driving on a line slightly offset to the target vehicle.
Vehicles edging into the lane ahead which are not detected by the system until they have moved into the radar beam.

On the approach to, or exit from a bend, a target vehicle may be lost or a new target acquired as vehicles ahead change their
angular position with respect to the radar sensor. On a straight road, if the sensing vehicle is in follow mode below its selected
set speed, losing the target vehicle will cause the sensing vehicle to accelerate to this set speed. This acceleration is
undesirable either on, or entering a bend when the target is suddenly lost, and in this situation the system inhibits the
resumption of the set speed.

The speed control system compares vehicle speed data from the ABS system with the relative speed of an external object as
detected by the radar sensor to ascertain whether the object is stationary or not.


NOTE: If tires are fitted which are different in diameter from those specified for the vehicle, the vehicle speed calculated
by the ABS will not be the true road speed. This situation may cause stationary objects to be falsely identified as moving
vehicles and result in automatic deceleration on a clear road.



SPEED CONTROL SWITCHES Component Description

www.JagDocs.com

Published: 08-Nov-2013
Speed Control - V8 5.0L Petrol/V8 S/C 5.0L Petrol - Speed Control
Diagnosis and Testing

Principles of Operation

For a detailed description of the speed control system, refer to the relevant Description and Operation sections in the
workshop manual.

Inspection and Verification


CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not
guarantee confirmation of a fault, and may also cause additional faults in the vehicle being tested and/or the donor vehicle.
1. Verify the customer concern.

2. Visually inspect for obvious signs of damage and system integrity.

Visual Inspection
Mechanical Electrical
Speed control sensor
Ensure the speed control sensor is free from obstructions
Speed control module
Brake switch
Fuses
Wiring harness
Electrical connector(s)
Steering wheel switches
Brake switch
Speed control sensor
Speed control module
Engine Control Module (ECM)
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to
the next step.

4. If the cause is not visually evident, verify the symptom and refer to the Symptom Chart, alternatively, check for
Diagnostic Trouble Codes (DTCs) and refer to the DTC Index.
Speed Control Sensor Adjustment (vehicles with adaptive system installed)

An incorrectly aligned speed control sensor can cause incorrect system operation. Before starting any repair work on the speed
control system, on vehicles with the adaptive system installed, check speed control sensor for correct vertical alignment, and
carry out speed control sensor alignment procedure using manufacturer approved diagnostic system.

Symptom Chart

Symptom Possible Causes Action Speed control inhibited or
disabled
Power or ground supply to
speed control module or speed
control sensor
Steering wheel speed control
switch/circuits
Throttle sensors
Brake switch
Anti-Lock Brake System fault
Check for DTCs that could be caused by power or
ground failure to the module or sensor and refer to
DTC Index
Check for sticking, jammed and broken speed control
switches. Refer to the electrical circuit diagrams and
check speed control switch circuits for short, open
circuit
For throttle position sensor tests. REFER to:
Electronic Engine Controls - 3.0L Diesel (303-14
Electronic Engine Controls - 3.0L Diesel, Diagnosis and
Testing),
Electronic Engine Controls - 3.0L (303-14B Electronic Engine Controls - V6 3.0L Petrol, Diagnosis and
Testing),
Electronic Engine Controls (303-14 Electronic Engine
Controls - V8 4.2L Petrol/V8 S/C 4.2L Petrol, Diagnosis
and Testing).
Check for correct installation and adjustment of brake
switch. Refer to the electrical circuit diagrams and
check brake switch circuits for short, open circuit
Check ABS system for related DTCs and refer to the
relevant DTC Index Unable to regulate/adjust
vehicle speed
Steering wheel switch
malfunction
Check for sticking, jammed and broken speed control
switches. Refer to the electrical circuit diagrams and
check speed control switch circuits for short, open
circuit

DTC Description Possible Causes Action C1A67-98 Forward Looking Sensor
- Component or system
over temperature
Speed control sensor
internal temperature
exceeded threshold
Allow system to cool. Note: This DTC will be cleared
automatically when environmental conditions allow P174E-81
Output Shaft
Speed/ABS Wheel
Speed Correlation -
Invalid serial data
received
Follow speed is
mis-calculated to too
high a value
Clear DTC and re-test U0001-88
High Speed CAN
Communication Bus -
Bus off
Vehicle CAN Bus off
condition
Carry out any pinpoint tests associated with this
DTC using the manufacturer approved diagnostic
system. Carry out CAN network integrity tests using
the manufacturer approved diagnostic system U0100-00
Lost Communications
With ECM/PCM "A" - No
sub type information
ECM missing message
Carry out any pinpoint tests associated with this
DTC using the manufacturer approved diagnostic
system. Check ECM for related DTCs and refer to the
relevant DTC Index U0101-00
Lost Communications
With TCM - No sub
type information
TCM missing message
Carry out any pinpoint tests associated with this
DTC using the manufacturer approved diagnostic
system. Check TCM for related DTCs and refer to the
relevant DTC Index U0103-00
Lost Communication
With Gear Shift Control
Module A - No sub type
information
No sub type information
Refer to the electrical circuit diagrams and check the
power and ground connections to the Transmission
Shift Module. Using the manufacturer approved
diagnostic system, complete a CAN network integrity
test. Refer to the electrical circuit diagrams and
check the CAN network between the Transmission
Shift Module and Speed Control Module U0103-87
Lost Communication
With Gear Shift Module
- Missing Message
Transmission shift
module missing message
Carry out any pinpoint tests associated with this
DTC using the manufacturer approved diagnostic
system. Check transmission shift module for related
DTCs and refer to the relevant DTC Index U0121-00
Lost Communication
With Anti-lock Brake
System (ABS) Control
Module - No sub type
information
ABS missing message
Carry out any pinpoint tests associated with this
DTC using the manufacturer approved diagnostic
system. Check ABS for related DTCs and refer to the
relevant DTC Index U0128-00
Lost Communications
With Park Brake Module
- No sub type
information
Parking brake missing
message
Carry out any pinpoint tests associated with this
DTC using the manufacturer approved diagnostic
system. Check parking brake module for related
DTCs and refer to the relevant DTC Index U0155-00
Lost Communications
With Instrument Panel
Cluster (IPC) Control
Module - No sub type
information
Instrument cluster
missing message
Carry out any pinpoint tests associated with this
DTC using the manufacturer approved diagnostic
system. Check instrument cluster for related DTCs
and refer to the relevant DTC Index U0300-00
Internal Control Module
Software
Incompatibility - No
sub type information
Invalid configuration
message is received
Re-configure the speed control module using the
manufacturer approved diagnostic system. Clear
DTCs and re-test. If DTC still logged, suspect
incorrect speed control module installed. Check and
install a new module as required, refer to new
module/component installation note at top of DTC
Index U0300-55
Internal Control Module
Software
Incompatibility - Not
configured
RJB - at least one of the
car configuration
parameters is not
configured
Re-configure the RJB using the manufacturer
approved diagnostic system www.JagDocs.com

DTC Description Possible Causes Action U0401-00
Invalid Data Received
From ECM/PCM A - No
sub type information
ECM did not respond
properly to speed control
cancel or auto brake
cancel request
Check ECM for related DTCs and refer to relevant
DTC Index U0401-67
Invalid Data Received
From ECM/PCM A -
Signal incorrect after
event
ECM did not respond
properly to speed control
resume request
Check ECM for related DTCs and refer to relevant
DTC Index U0401-81
Invalid Data Received
From ECM/PCM A -
Invalid serial data
received
Invalid data received
from engine control
module
Bus signal/message
failure
Speed control inhibited
by ECM
Check the Engine Control Module for related DTCs
and refer to relevant DTC Index. If U040181 is
logged as historic but no other DTCs have logged in
the engine control module at the same time and
distance, it may be caused by cranking with low
voltage conditions. Check battery and charging
system according to instructions in the battery care
manual. Install the latest Engine Control Module
software using the manufacturer approved diagnostic
system, contact Dealer Technical Support before
replacing components U0415-53
Invalid Data Received
From Anti-Lock Braking
System (ABS) Control
Module - De-activated
Event information
Deactivated
Check the Anti-Lock Braking System Module for
related DTCs and refer to the relevant DTC index U0415-81
Invalid Data Received
From Anti-lock Brake
System (ABS) Control
Module - Invalid serial
data received
Stability assist fault
Check ABS module for related DTCs and refer to
relevant DTC Index U0417-67
Invalid Data Received
From Park Brake
Control Module - Signal
incorrect after event
Parking brake module did
not respond properly to
apply request
Check parking brake module for related DTCs and
refer to relevant DTC Index U0417-81
Invalid Data Received
From Park Brake
Control Module -
Invalid serial data
received
Speed control inhibited
by parking brake module
Check parking brake module for related DTCs and
refer to relevant DTC Index U0418-68
Invalid Data Received
From Brake System
Control Module - Event
information
Event information
Check the Anti-Lock Braking System Module for
related DTCs and refer to the relevant DTC index U0421-81
Invalid Data Received
From Suspension
Control Module 'A' -
Invalid serial data
received
Invalid serial data
received
Check the Suspension Control Module for related
DTCs and refer to the relevant DTC index U0423-81
Invalid Data Received
From Instrument Panel
Control Module -
Invalid serial data
received
Speed control inhibited
by instrument cluster
Check instrument cluster, CJB and RJB for related
DTCs and refer to relevant DTC Index U1A00-88
Private Communication
Network - Bus off
Bus off
The module setting this code has disabled CAN
transmission. Check for other bus off codes. Check
the module and circuits. Refer to the electrical circuit
diagrams. Clear all DTCs and road test the vehicle. If
the concern reoccurs contact Dealer Technical
Support for further advice. Under no circumstance
should any parts be replaced to overcome this issue U1A14-49
CAN Initialisation
Failure - Internal
electronic failure
Internal electronic failure
Suspect the speed control module. Check and install
a new module as required, refer to the new
module/component installation note at the top of
the DTC Index U2101-00
Control Module
Configuration
Incompatible - No sub
type information
Data sent from RJB is
invalid
Check/amend Car Configuration File using the
manufacturer approved diagnostic system, clear DTC
and re-test. If DTC remains, re-configure RJB using
manufacturer approved diagnostic system, clear DTC
and re-test. If DTC remains check RJB for DTCs and

DTC Description Possible Causes Action refer to DTC Index U3000-41
Control Module -
General checksum
failure
Internal micro controller
error
Checksum fault
Suspect the speed control module. Check and install
a new module as required, refer to the new
module/component installation note at the top of
the DTC Index U3000-42
Control Module -
General memory failure
Internal RAM test fault
Suspect the speed control module. Check and install
a new module as required, refer to the new
module/component installation note at the top of
the DTC Index U3000-49
Control Module -
Internal electronic
failure
Internal control module
failure
Suspect the speed control module. Check and install
a new module as required, refer to the new
module/component installation note at the top of
the DTC Index U3000-63
Control Module -
Circuit/component
protection time-out
Circuit/component
protection time-out
The Control module internal protection has been
activated. Check for other related DTCs that could
lead to this event. Clear the DTC and retest. If the
problem persists, renew the module. Refer to the
warranty policy and procedures manual if a module is
suspect U3003-62
Battery Voltage -
Signal compare failure
Signal compare failure
Battery supply voltage
below a recognized value
Check vehicle battery and charging system. Refer to
the relevant section in the workshop manual. Refer
to the electrical circuit diagrams and check the power
and ground supply circuits to the modules Vehicles WITHOUT Adaptive System Installed


CAUTION: When probing connectors to take measurements in the course of the pinpoint tests, use the adaptor kit, part
number 3548-1358-00
NOTES:


If a module or component is suspect, and the vehicle remains under the Manufacturers warranty, refer to the Warranty
Policy and Procedure manual (section B1.2), or determine if any prior approval programme is in operation, prior to the
installation of a new module/component.


Generic scan tools may not read the codes listed, or may read only five digit codes. Match the five digits from the scan
tool to the first five digits of the seven digit code listed to identify the fault (the last two digits give extra information read by
the manufacturer-approved diagnostic system).


When performing voltage or resistance tests, always use a digital multimeter (DMM) accurate to three decimal places and
with a current calibration certificate. When testing resistance, always take the resistance of the DMM leads into account.


Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.


If DTCs are recorded and, after performing the pinpoint tests, a fault is not present, an intermittent concern may be the
cause. Always check for loose connections and corroded terminals.

DTC Description Possible Causes Action P0500-82 Vehicle Speed Sensor A - Alive / sequence counter incorrect /
not updated
Vehicle speed - invalid
signal received over CAN
Check ABS for related DTCs and refer to
relevant DTC Index P0500-86
Vehicle Speed Sensor A -
Signal invalid
Vehicle speed - invalid
signal received over CAN
Check ABS for related DTCs and refer to
relevant DTC Index P0501-00
Vehicle Speed Sensor A
Range/Performance - No sub
type information
Vehicle speed signal from
ABS not plausible
Carry out CAN network integrity test using
the manufacturer approved diagnostic
system. Contact Dealer Technical Support

DTC Description Possible Causes Action for further assistance P0501-62
Vehicle Speed Sensor A
Range/Performance - Signal
compare failure
Vehicle speed - range
performance
Check ABS/TCM for related DTCs and refer
to relevant DTC Index P0504-00 Brake Switch A / B Correlation
- No sub type information
The brake pressure reading
does not agree with the
brake light switch value
Carry out any pinpoint tests associated with
this DTC using the manufacturer approved
diagnostic system. Refer to the electrical
circuit diagrams and check brake switch
circuits for short, open circuit, high
resistance P0504-01 Brake Switch A / B Correlation
- General electrical failure
Brake switch high fault:
- Brake lights stuck
on
- Gearshift interlock
inoperative
- Speed control
inoperative
Brake switch low fault:
- Brake lights
inoperative
- Gearshift stuck in
Park
- Reduced engine
braking
Carry out any pinpoint tests associated with
this DTC using the manufacturer approved
diagnostic system. Refer to the electrical
circuit diagrams and check brake switch
circuits for short, open circuit, high
resistance P0566-00
Cruise Control OFF Signal - No
sub type information
Speed control Cancel
switch 2 stuck closed
Refer to the electrical circuit diagrams and
check speed control switch circuits for short,
open circuit. Check for stuck switch. Check
and install a new speed control switch as
required P0567-00
Cruise Control DECREASE
DISTANCE Signal - No sub
type information
Speed control Resume
switch 7 stuck closed
Refer to the electrical circuit diagrams and
check speed control switch circuits for short,
open circuit. Check for stuck switch. Check
and install a new speed control switch as
required P0568-00
Cruise Control INCREASE
DISTANCE Signal - No sub
type information
Speed control Accel Set
Plus Switch 6 stuck closed
Check and install a new speed control
switch as required P0569-00
Cruise Control COAST Signal -
No sub type information
Speed control Coast Set
Minus switch 3 stuck
closed
Refer to the electrical circuit diagrams and
check speed control switch circuits for short,
open circuit. Check for stuck switch. Check
and install a new speed control switch as
required P056A-00
Cruise Control INCREASE
DISTANCE Signal - No sub
type information
Speed control Headway
Plus switch 4 stuck closed
Refer to the electrical circuit diagrams and
check speed control switch circuits for short,
open circuit. Check for stuck switch. Check
and install a new speed control switch as
required P056B-00
Cruise Control DECREASE
DISTANCE Signal - No sub
type information
Speed control Headway
Minus switch 5 stuck
closed
Refer to the electrical circuit diagrams and
check speed control switch circuits for short,
open circuit. Check for stuck switch. Check
and install a new speed control switch as
required P0571-62
Brake Switch A Circuit - Signal
compare failure
Plausibility error
Refer to the electrical circuit diagrams and
check brake light switch signal circuits for
short, open circuit. Check and install a new
brake light switch as required P0575-01
Cruise Control Input Circuit -
General electrical failure
General electrical failure
Check speed control system for related
DTCs and refer to relevant DTC Index. Carry
out CAN network integrity tests using the

Published: 11-May-2011
Climate Control - Air Conditioning - System Operation and Component Description
Description and Operation


General System Operation

To accomplish the transfer of heat, refrigerant is circulated around a sealed system, where it passes through two
pressure/temperature regimes. In each of the regimes the refrigerant changes state, during which process maximum heat
absorption or dissipation occurs.

The low pressure/temperature regime is from the thermostatic expansion valve, through the evaporator to the compressor. The
refrigerant decreases in pressure and temperature at the thermostatic expansion valve, then changes state from a liquid to a
vapor in the evaporator to absorb heat.

The high pressure/temperature regime is from the compressor, through the condenser and receiver drier assembly to the
thermostatic expansion valve. The refrigerant increases in pressure and temperature as it passes through the compressor, then
releases heat and changes state from a vapor to a liquid in the condenser.

Operation of the A/C (air conditioning) system is controlled by the ATC (automatic temperature control) module.
Refer to: Control Components (412-01 Climate Control, Description and Operation). The A/C system works in conjunction with: The air distribution and filtering system.
Refer to: Air Distribution and Filtering (412-01 Climate Control, Description and Operation). The heating and ventilation system.
Refer to: Heating and Ventilation (412-01 Climate Control, Description and Operation).