Crank JAGUAR XFR 2010 1.G Manual Online

Published: 01-Aug-2012
Fuel System - General Information - Fuel System Pressure Release V8 5.0L
Petrol/V8 S/C 5.0L Petrol
General Procedures

Draining

1. Remove the fuel pump fuse.

2. Remove the fuel filler cap.


3. CAUTION: When depressurising the fuel system, make sure that
there is no throttle input. Failure to follow this instruction may cause
damage to the vehicle.
Start the engine and allow it to idle until the engine stalls.

4. Crank the engine for approximately five seconds to make sure that the
fuel rail pressure is released.

Filling


1. NOTE: Make sure all repairs have been carried out before
proceeding to the following steps.
Install the fuel pump fuse.

2. Install the fuel filler cap.

3. Read and clear stored DTC fault codes.

1 Fuel supply connection 2 Electrical connector 3 Flange locking ring and seal 4 Sucking jet connector 5 Fuel pump module 6 Fuel pick up filter 7 Level sensor float 8 RH level sensor 9 Fuel filter 10 Pressure relief valve 11 Pump supply to flange connection 12 The fuel pump is a variable speed rotary vane type. The pump is energized by the fuel pump relay which is located in the RJB and the FPDM which is located under the RH floor pan above the rear suspension stabilizer bar. The relay and FPDM are controlled by the ECM.
A fine mesh filter is located in the lower section of the pump module. This provides filtration to the fuel as it is drawn into the
module. There is a winged filter on the fuel pump that gives additional protection and a life time fuel filter integrated into the
flange which eliminates the need for an additional filter further downstream in the fuel system.
The RH fuel level sensor is mounted into the pump module housing.
FUEL PUMP DRIVER MODULE (FPDM)



The FPDM is located on a bracket which is integral with the charcoal canister. The module is attached to one end of the canister with a bracket.

The fuel pump operation is regulated by a FPDM which is controlled by the ECM. The FPDM regulates the flow and pressure supplied by controlling the operation of the fuel pump using a PWM (pulse width modulation) output.

The FPDM is powered by a supply from the fuel pump relay in the RJB. The fuel pump relay is energized on opening the driver's door, pressing the start button only or pressing the start button and the footbrake (which initiates engine cranking). The FPDM supplies power to the fuel pump, and adjusts the power to control the speed of the fuel pump and thus the pressure and flow
in the fuel delivery line.

A PWM signal from the ECM tells the FPDM the required speed for the fuel pump. The on time of the PWM signal represents half the fuel pump speed, e.g. if the PWM signal has an on time of 50%, the FPDM drives the pump at 100%.
The FPDM will only energize the fuel pump if it receives a valid PWM signal, with an on time of between 4% and 50%. To switch the fuel pump off, the ECM transmits a PWM signal with an on time of 75%.
The output pressure from the fuel pump will change with changes of engine demand and fuel temperature. The ECM monitors the input from the fuel rail LP sensor and adjusts the speed of the fuel pump as necessary to maintain a nominal output
pressure of 450 kPa (4.5 bar; 65.3 lbf/in.2
), except during engine start-up. At engine start-up the target pressure for the fuel
delivery line is 630 kPa (6.3 bar; 91.4 lbf/in.2
).
If the SRS (supplemental restraint system) outputs a crash signal on the high speed CAN (controller area network), the ECM de-energizes the fuel pump relay to prevent any further fuel being pumped to the engine.

If the ECM does not detect pressure in the fuel delivery line, it stops, or refuses to start the engine and stores the appropriate DTC (diagnostic trouble code).
The ECM receives a monitoring signal from the FPDM. Any DTC's produced by the FPDM are stored by the ECM.
DTC's can be retrieved from the ECM using an approved Jaguar diagnostic system. The FPDM itself cannot be interrogated by the approved Jaguar diagnostic system.

Visual Inspection

Mechanical Electrical
Low/contaminated fuel
Fuel supply/return line(s)
Fuel tank and filler pipe
Fuel leak(s)
Fuel filler cap
Fuel filter
Push connect fittings
Fuel pump
Fuses
Links
Relays
Fuel Pump Driver Module (FPDM)
Fuel pump module
Sensor(s)
Engine control module (ECM)
Rear Junction Box (RJB)
Restraints Control Module (RCM)
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 proceed to the DTC Index

Symptom Chart

Symptom Possible Causes Action Engine cranks, but does not
fire
Engine breather system
disconnected/restricted
Ignition system
Fuel system
Electronic engine control
Ensure the engine breather system is free from
restriction and is correctly installed
Check for ignition system, fuel system and electronic
engine control DTCs and refer to the relevant DTC
Index Engine cranks and fires, but
will not start
Evaporative emissions purge
valve
Fuel pump
Spark plugs
HT short to ground (tracking)
check rubber boots for
cracks/damage
Ignition system
Check for evaporative emissions, fuel system and
ignition system related DTCs and refer to the
relevant DTC Index Difficult cold start
Engine coolant level/anti-
freeze content
Battery
Electronic engine controls
Fuel pump
Purge valve
Check the engine coolant level and condition
Ensure the battery is in a fully charged and
serviceable condition
Check for electronic engine controls, engine
emissions, fuel system and evaporative emissions
system related DTCs and refer to the relevant DTC
Index Difficult hot start
Injector leak
Electronic engine control
Purge valve
Fuel pump
Ignition system
Check for injector leak, install new injector as
required
Check for electronic engine controls, evaporative
emissions, fuel system, ignition system and engine
emission system related DTCs and refer to the
relevant DTC Index Difficult to start after hot
soak (vehicle standing,
engine off, after engine has
reached operating
temperature)
Injector leak
Electronic engine control
Purge valve
Fuel pump
Ignition system
Check for injector leak, install new injector as
required
Check for electronic engine controls, evaporative
emissions, fuel system, ignition system and engine
emission system related DTCs and refer to the
relevant DTC Index Engine stalls soon after start
Breather system
disconnected/restricted
ECM relay
Electronic engine control
Ignition system
Air intake system restricted
Air leakage
Fuel lines
Ensure the engine breather system is free from
restriction and is correctly installed
Check for electronic engine control, ignition system
and fuel system related DTCs and refer to the
relevant DTC Index
Check for blockage in air filter element and air
intake system
Check for air leakage in air intake system Engine hesitates/poor
acceleration
Fuel pressure, fuel pump,
fuel lines
Injector leak
Air leakage
Check for fuel system related DTCs and refer to the
relevant DTC Index
Check for injector leak, install new injector as
required 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

the RCM and illuminated by the instrument cluster on receipt of high speed CAN bus messages. The safety belt warning indicator is not subject to the 3 second indicator check when the ignition is switched on.

The operation of the passenger seat buckle switch is as described below with the exception that the instrument cluster must
receive a hardwired signal from the belt minder control module to indicate that a passenger is occupying the seat.
The safety belt warning indicator is subject to a timer. The warning indicator is activated when the following conditions exist:
Ignition is switched on
One of the front seat belts is unbuckled
USA market only - 75 seconds has elapsed after ignition on mode is selected
Vehicle is not in reverse gear
Vehicle speed is more than 8 km/h (5 mph).

Once the above parameters are met, the instrument cluster flashes the warning indicator at 2 Hz for 10 seconds accompanied
by a simultaneous chime. After 10 seconds the chime ceases and the warning indicator is permanently illuminated for 20
seconds. This sequence is repeated every 30 seconds until one of the following events occurs:
300 seconds has elapsed
The safety belt of the occupied front seats is fastened
The ignition is switched to off mode
The vehicle speed decreases to below 5 km/h (3 mph).


NOTE: On USA market vehicles, the warning indicator in not permanently illuminated.

The safety belt minder function cannot be disabled. The seat belt minder function can be disabled.
Refer to: Safety Belt System (501-20A Safety Belt System, Description and Operation). 14. Side Lamp Indicator

The instrument cluster controls the green colored side lamp indicator on receipt of a side lamp status message on the medium
speed CAN bus from the CJB and the auxiliary junction box. The lighting switch on the LH steering column multifunction switch is connected to the instrument cluster. Selections using this switch are detected by the cluster which requests the side or
headlamp operation via a message to the CJB and the RJB. The CJB and the RJB responds with a side lamp active message and the cluster illuminates the side lamp indicator. The side lamp indicator is not subject to the 3 second indicator check when
the ignition is switched on.
15. High Beam Indicator

The instrument cluster controls the blue colored high beam indicator on receipt of a high beam status message on the medium
speed CAN bus from the CJB. The lighting switch on the LH steering column multifunction switch is connected to the instrument cluster. High beam or flash selections using this switch are detected by the cluster which requests the light
operation via a CAN message to the CJB. The CJB responds with a high beam active message and the cluster illuminates the high beam indicator. The high beam indicator is not subject to the 3 second indicator check when the ignition is switched on.
16. Rear Fog Lamp Indicator

The amber colored rear fog lamp indicator is controlled by the auxiliary junction box and illuminated by the instrument cluster
on receipt of a rear fog lamp on message on the medium speed CAN bus from the RJB. The indicator is illuminated for as long as the rear fog lamps are active. The rear fog lamp indicator is not subject to the 3 second indicator check when the ignition is
switched on.

SPEEDOMETER

The speedometer is driven by high speed CAN signals transmitted by the ABS module. The wheel speeds are measured by sensors reading the rotational speed of the rear wheels from toothed targets on the hubs. An average of the two wheel speeds
are passed from the sensors to the ABS module in the form of pulsed signals. The ABS module converts these signals into a speed output on the high speed CAN to the instrument cluster. The same speed outputs from the wheel speed sensors are also used to calculate the distance the vehicle has travelled.

TACHOMETER

The tachometer is driven by an engine speed signal transmitted on the high speed CAN from the ECM. The signal is derived from the CKP (crankshaft position) sensor. The signal is received by the instrument cluster microprocessor and the output from
the microprocessor drives the tachometer.

FUEL GAGE

The fuel gage is controlled by CAN messages from the RJB. The RJB reads the values output by the fuel level sensors every 131 ms and transmits a fuel tank contents value, corrected for battery voltage, in a CAN message to the instrument cluster. A fuel pump symbol is displayed to the left of the linear gage. An arrow above the symbol shows the driver on which side of the
vehicle the fuel filler cap is located. Above the linear fuel gage, is a LCD (liquid crystal display) area which displays odometer
and trip readouts. When a trip computer function is selected, these are replaced by a trip computer display for the trip function
selected.

LIQUID CRYSTAL DISPLAY

In the area above and below the message center is a LCD display. The area below the message center displays a linear fuel www.JagDocs.com

. M–2
Benchmark noise against non-complaint
vehicle. . Trip (fuel) computer N–1
Check for consistent display (during test
drive) of valid 'Rolling Odometer' count in
Self-Diagnostic Mode/ETM test 24. Displays ---- , INV or 255 if message is not
received, or if received data is invalid. . N–2
Check that installed wheels and tires are
standard Jaguar fit. Confirm fitted wheel
size in IDS, 'ADD REMOVE ACCESSORY'
section. Non standard wheels and tires or incorrectly set
wheel size may lead to Odometer increment
inaccuracies. This will impact the distance
accumulators, which in turn affects the rolling
average, fuel economy and range values. Trip
distance accumulation will also be incorrect. . N–3
Consider noting odometer value and
resetting fuel computer system. Advise
customer to conduct brim-to-brim fuel
tank test. Use collected information to
determine if system accurate. . Column adjust O-1
Check with IDS for DTCs related to powered column system. . O-2
Check cluster battery supply voltage and
ground resistance. Check for loose
connections. . O-3
Check power column motors supply voltage. . O-4
Check power column switch for physical damage. . Passive Anti-Theft
System (PATS)
indicator P–1
Check for three second prove out when
vehicle start button is pressed. . . P–2
Check for loose connections/wiring continuity. . . P–3 Check ignition switch for physical damage. . Cluster illumination Q–1
Check for loose connections/wiring continuity. . . Q–2 Check dimmer switch operation. . Cluster backlight operation R–1
Is the backlight on other components inoperative. . . R–2 Check dimmer switch operation. . . R–3
Check for loose connections/wiring continuity. . Chime/tone operation S–1 Check vehicle configuration. . . S–2
Utilize lights ON, ignition OFF, door open warning to verify chime operation. . . S–3 Check appropriate sensing circuit. . Continuous chime/tone T–1 Check appropriate sensing circuit. . Unexpected chime operation U–1 Check vehicle configuration. . Message centre display illumination V–1
Is the backlight 'ON' and other components dim? . . V–2
Does the lighting level of other
components change when dimmer adjusted? . Message centre
display issue W–1
Perform Self-Diagnostic Mode test/ETM
tests 5 to 9, to prove out LCD display
function. . Message centre
missing lines X–1
Perform Self-Diagnostic Mode test/ETM
tests 5 to 9, to prove out LCD display
function. . Message centre
incorrect message Y–1 What is the message? . . Y–2
Check for open circuit/shorts in wiring to
related warning light trigger (module,
sensor, switch). . Cluster/connectivity Z–1 Check cluster battery and ignition wiring. . . Z–2 Check cluster grounds. . . Z–3 Disconnect/reconnect cluster. . . Z–4
Attempt to enter Self-Diagnostic
Mode/ETM to prove cluster response to inputs. . No crank AA–1
Check with IDS for presence of related
DTCs. . . AA–2
Is there a Passive Anti-Theft System (PATS) flash code? . . AA–3
Does the vehicle crank with the other passive key? .

Area of
Concern/Symptom Diagnostic
Ref. No.
Actions
Notes . AA–4
Ensure only one key is in the vehicle, try
both keys in the Starter Control Unit (SCU). If this test starts the vehicle this tends to
indicate an issue with the keyless vehicle
module. . AA-5 Tried new key? . AA–6 Check battery voltage. . . AA–7 Diagnose non-start condition with IDS. . . AA–8 Attempt PATS key erase and re-learn.
Ensure keys are erased from current cluster if
replacing cluster. Crank but no-start AB–1 Diagnose non-start condition with IDS. Not usually caused by cluster issue. Incorrect configuration AC–1 Attempt to configure cluster. . . AC–2
Ensure battery voltage is maintained
above 12.5 volts if cluster re-configured. .
1. If the cause is not visually evident, verify the symptom and refer to the Self-Diagnostic Mode

Self-Diagnostic Mode

To place the cluster in engineering test mode (ETM) carry out the following steps

1. Press and hold the stalk trip cycle button, for more than five seconds but less than eight seconds, whilst briefly pressing the
vehicle START button. There is no initial display indication that the instrument cluster has entered ETM. If ETM has successfully
been entered then 'ENGINEERING TEST MODE' will be displayed in the Message Centre when the stalk trip button is released .
2. To navigate forward through the instrument cluster Self-Diagnostic Mode tests, press the stalk trip cycle button.

3. Each push of the stalk trip cycle button will advance one step through the ETM sequence. It is not possible to move
backward through the test sequence.
4. To exit the Self-Diagnostic Mode press and hold the stalk trip cycle button for more than three seconds.

5. The Self-Diagnostic Mode is also deactivated when the ignigition switch is turned to the 'OFF' position or low battery voltage
is detected.
6. If the Self-Diagnostic Mode cannot be accessed repeat the above paying particular care to the sequence timing.
7. The ETM text is not language configurable and will be displayed in English.


ETM Test/no. Message Center Display Gauge/Indicator/Display
Tested.
Range
Description 1 - Self-
diagnostic entry. ENGINEERING TEST
MODE. .
Not Applicable
(N/A). Establishes Self - Diagnostic mode. 2 - Gauge
sweep. GAUGE SWEEP.
Tachometer and speedometer.
Gauges display current values
after test. (N/A).
All gauges go through a full up and
down pointer sweep smoothness
check. 3- Warning
lamp LED's. TELL TALE TEST.
All internally controlled
lamps/LED's regardless of
software configuration. (N/A).
Illuminates all the LED warning
indicators that are controlled by the
instrument cluster. When this test is
exited current vehicle warning lamps
will remain illuminated. 4 - Version
information. PROGRAM VERSION.

ROM: XXXX
NVM: XXXX
REV: XXXX
DATE: XXXX Software Read only memory
(ROM) and Non volatile memory
(NVM) version and date. (N/A).
Display's the instrument cluster ROM
and NVM level version and date or
indication of ROM checksum fault. 5 - Message
Center display. LCD display in
WHITE. Message center LCD display. (N/A).
Activates all pixels of LCD display in
White. 6 - Message
Center display. LCD display in DARK
GREY. Message center LCD display. (N/A).
Activates all pixels of LCD display in
Dark Grey. 7 - Message
Center display. LCD display in LIGHT
GREY. Message center LCD display. (N/A).
Activates all pixels of LCD display in Light Grey. 8 - Message
Center display. LCD display in four
bands black to white, top to bottom. Message center LCD display. (N/A).
Activates all pixels of LCD in four
bands from black to white, from top
to bottom. 9 - Message
Center display. LCD display in four
bands dark to light
left to right. Message center LCD display. (N/A).
Activates all pixels of LCD in four
bands from dark to light, from left
to right. 10 - Digital
I/O. DIGITAL I/O.

A: XXXX
E:XXXX
B: XXXX
F:XXXX Cluster configuration settings. (N/A).
Display Hex coding of cluster
configuration settings ports A to H.
Not defined for diagnostic purpose.

Message Other Warnings Reason Action in LCD. system and the tire pressures
cannot be monitored. ENGINE TEMPERATURE
HIGH Amber warning triangle
illuminated in LCD at temperatures of between
118.0°C (244.4°F) and
119.3°C (246.8°F). Engine coolant temperature has
exceeded threshold for normal
operation.
Stop vehicle and allow engine
to idle for 5 minutes. Switch off
engine and allow to stand for
not less than 10 minutes. Check
coolant level.
If message re-appears,
investigate coolant system for
leakage. ENGINE
OVERHEATING Red warning triangle
illuminated in LCD at temperatures of 119.4°C
(247°F) or above. Engine coolant temperature has
exceeded threshold for normal engine
operation.
Stop vehicle and allow engine
to idle for 5 minutes. Switch off
engine and allow to stand for
not less than 10 minutes. Check
coolant level.
If message re-appears,
investigate coolant system for
leakage. ENGINE OIL
PRESSURE LOW Red warning triangle
illuminated in LCD. Engine oil pressure has fallen below the
threshold for normal operation. Stop the engine immediately. Check
engine oil level. If oil level correct, do
not restart engine until oil pressure
loss has been identified and corrected. RESTRICTED
PERFORMANCE Red or Amber warning
triangle illuminated in LCD depending on nature of power loss. A fault has occurred which has reduced
engine power output. Investigate cause of engine power
loss. Interrogate control modules for
faults and diagnose using an approved Jaguar Diagnostic System. ENGINE SYSTEMS
FAULT
MIL (malfunction
indicator lamp)
illuminated for
certain faults.
Red or Amber
warning triangle
illuminated in LCD.
A fault has occurred in the
engine management system or, if
the MIL is illuminated, an emissions related fault is present
which has been detected by
the On-Board Diagnostic
systems in the ECM and TCM. A fault has occurred with the
start/stop switch.
Investigate cause of fault.
Interrogate ECM and TCM for faults and diagnose using an
approved Jaguar Diagnostic
System.
Check start/stop switch for
correct operation or short
circuits. CHECK FUEL
FILLER CAP
(NAS Vehicles Only)
Red warning triangle
illuminated in LCD. The Diagnostic Monitoring Tank Leakage
(DMTL) system has detected fuel filler
cap has not been correctly installed or
the system has a leak. Check fuel filler cap to ensure is it is
correctly installed and secure or check
the fuel system for leakage. ENGINE TEMPERATURE
INDICATION
FAULT Red warning triangle
illuminated LCD. A fault has occurred in the engine
management system and the engine
temperature signal is no longer being
received. Investigate cause of engine
temperature failure. Interrogate ECM for faults and diagnose using an approved Jaguar Diagnostic System. PLEASE WAIT
COLD START IN
PROGRESS Amber warning triangle
illuminated LCD. Message appears after start/stop switch
is pressed. Glow plugs are warming up,
message will appear for up to 12
seconds dependant on ambient
temperature. Engine will crank once message is switched off. None GEARBOX FAULT
Battery symbol and amber
warning triangle illuminated
in LCD. TCM has detected a fault in the Investigate transmission fault. transmission. Transmission may default
to 'limp home' mode and only allow
limited operation of forward gears and
reverse. Interrogate TCM and diagnose fault using an approved Jaguar Diagnostic
System. BATTERY NOT
CHARGING Red warning triangle
illuminated in LCD. Charge output from generator not
detected by ECM. Investigate cause of generator failure. OVER 120 km/h
(GULF States Only)
Red text illuminated
in LCD. Vehicle has exceeded the preset 120
km/h speed value. Reduce vehicle speed. DPF FULL SEE
HANDBOOK Amber or Red warning
triangle illuminated LCD. ECM has detected diesel particulate Drive the vehicle as described in the filter is becoming blocked or has become
blocked. owners handbook or the workshop
manual to clean the filter. COOLANT LEVEL
LOW Red warning triangle
illuminated in LCD. Coolant level in expansion tank has
fallen below minimum level.
Stop vehicle and allow engine
to idle for 5 minutes. Switch off
engine and allow to stand for
not less than 10 minutes. Check
coolant level and replenish

Published: 21-Dec-2012
Battery and Charging System - General Information - Quiescent Drain
Description and Operation

VEHICLE QUIESCENT CURRENT TESTING

On vehicles fitted with a Battery Monitoring System (BMS), the diagnostic routine for quiescent drain testing in the approved
Jaguar or Land Rover diagnostic system should be utilized.

If a customer complains of a vehicle battery that discharges continuously or when left for a prolonged period of time, it is
recommended that a quiescent drain test is performed as described below.

The battery drain should be measured using the approved Jaguar or Land Rover diagnostic system or a Digital Multi-Meter
(DVOM). A procedure for quiescent drain measurement using the diagnostic system is available in the Diagnosis and Testing
section of the Workshop Manual. The vehicle should be in the locked/armed state (for example vehicle alarm fully armed), all
doors, engine and luggage compartment lids are open and latched (so as to appear closed from an electrical point of view).
The test should take place after the vehicle has entered shutdown mode. The time taken for this to occur after the ignition is
switched off varies according to model (Refer to the Topix On line resource for details).

When the vehicle is armed, the effect of the security system Light Emitting Diode (LED) flashing is to cause a pulsation in the
measured current drain. In this case, either the average current should be taken (using a Digital Multi- Meter (DVOM) with an
averaging system) or the current reading taken, ignoring the brief high current peaks.
EQUIPMENT
Approved Jaguar or Land Rover diagnostic system with current probeOR Digital Multi-Meter (DVOM) with current probe.

METHOD OF MEASUREMENT

Using an Approved Jaguar or Land Rover Diagnostic System.
1. Switch off all electrical loads and ensure that the ignition is off
2. Connect the current probe to the approved Jaguar or Land Rover diagnostic system
3. Calibrate the probe
4. Install a clamp around the battery lead/junction box lead
5. Go to the Quiescent Current Testing section in this procedure

Using a digital multimeter

Do not use an in-line DVOM to measure the quiescent drain on vehicles fitted with an electronic throttle (for example XK 2006
onwards). The current exceeds the maximum amount the fuse in the DVOM is capable of handling.
1. Switch off all electrical loads and ensure that the ignition is off
2. Connect the current probe to the digital multmeter
3. Calibrate the probe
4. Install a clamp around the battery lead/junction box lead
5. Go to the Quiescent Current Testing section in this procedure

QUIESCENT CURRENT TESTING

1. Switch ignition to ‘on’ or select ignition mode in keyless vehicles and switch to ‘off’ (do not crank)
2. Remove key from ignition switch (if equipped)
3. Open and latch all doors, hood and luggage compartment lid
4. Lock the vehicle using the remote function on the remote handset. (Single lock only to avoid volumetric alarm arming)
5. Remove any other potential electrical drains such as accessories plugged into accessory sockets
6. Record the amperage readings after the shutdown period referenced in the Topix on line resource for details. Note all
cars from 10MY onwards and XK from 07MY and XF from 08MY should be less than 30mA after 30 minutes
7. Record the final reading on the battery report form

The preferred method of testing following an excessive current consumption figure is to use a current probe around individual
junction box leads to the various suspected circuits to identify a potential cause. This is in preference to the old method of
removing fuses for the following reasons:

The drain may be caused by a module remaining active and preventing the quiescent drain from reducing to normal
levels
The drain may be caused by a relay winding that is activated. Pulling the fuse can allow this to ‘reset’ and the drain will
be lost and go un-diagnosed

QUIESCENT DRAIN - TYPICAL VALUES


NOTE: The quiescent drain after the initial shutdown period should not exceed the value shown in the table.

Jaguar Quiescent Drain Values
MODEL SHUT DOWN PERIOD (minutes) TYPICAL VALUES BATTERY DRAIN (mA) XJS 3.2 60 <30 Sovereign 3.2 60 <37.3

Published: 02-Apr-2014
Battery and Charging System - General Information - Battery Report Form – In Service Batteries Only
Description and Operation


NOTE: Fields marked with * are mandatory and must be completed.

General Information *Vehicle Identification Number (VIN):
Vehicle
Model: Engine type: *Mileage:
*Repair
Date: - Customer Questions *1: What is the customer’s reason for dealer visit? (tick symptoms as appropriate) Non crank
Crank but non
start Warning message Other: *2: How long was the vehicle left prior to issue. * *3: How was the car left (Locked/unlocked) * *4: How did you access to the vehicle Key fob Manual key Handle pull *5: Has the vehicle required assistance for battery issues previously? Yes No *6: Is the vehicle used? (tick symptoms as appropriate) Daily
Every other day Weekly
Less than weekly *7: Average journey length * *8: How many starts do you typically do in a day * *9: Did the customer see any instrument pack warnings prior to the
issue? * *10: Have any of the features been used
without the engine running in the last 3 days (if fitted?) Radio
Power point
accessory CD DVD USB or IPOD
connection TV
Rear seat
entertainment 11: Customer comments:- Please add any additional comments that
are relevant. * Diagnostics (Battery Testing) - - - - 1: Loose battery clamps Yes * No * 2: Loose hold down clamps Yes * No * 3: Corroded terminal posts Yes * No * 4: Physical damage/leaks Yes No * 5: Low electrolyte (Flooded batteries only) Yes * No * 6: Battery Date Code * 7: FEAD belt tension OK * Not OK * 8: Quiescent Drain mA * 9: Vent tube correctly installed Yes * No * 10: Number of Times Battery Charged: * 10: Vent tube correctly installed Yes No 11: Remove the Surface (414-00 battery care requirements) Yes * No * 12: Battery voltage * 13: Midtronics test code before charging (EXP-1080) * 13a: If Midtronics indicates that the battery needs re-charging, charge
the battery following instructions on the recommended battery charger * 13b: Midtronics test code after charge * 13c: Midtronics test code result after charge * 13d: If "good and re-charge" charge the battery following instructions
on the recommended battery charger * 13e: If "charge and re-test" for both before and after the charge
renew the battery * 13f: Only renew the battery if "renew battery", "bad cell" or charge
and re-test has been displayed twice. * Technician Comments:- Please add any additional comments that are relevant. * * * * *