2010 JAGUAR XFR Control module

Operation of the airbag warning indicator is controlled by a high speed CAN bus message from the RCM to the instrument cluster. The RCM sends the signal to illuminate the airbag warning indicator if a fault is detected, and for approximately 6 seconds during the bulb check at the beginning of each ignition cycle.

Occupant Monitoring

There are two types of occupant monitoring:

In all markets except NAS & Australia, vehicles have an occupant detection sensor
In NAS markets, vehicles have an occupant classification system

For markets which have an occupant detection sensor, this has no interface with the restraints system and only provides the
belt reminder function.

For markets that have an occupant classification system, this provides the RCM with the occupancy status of the front passenger seat. The restraints control module uses this and the seat buckle status in the evaluation of the firing strategy for
the passenger front airbag, side airbag, and pretensioner.

Safety Belt Sensors

The buckle of each front safety belt incorporates a Hall effect sensor that provides a safety belt status signal to the RCM. The RCM broadcasts the status of the two front safety belts on the high speed CAN bus for use by the instrument cluster. In the event of a front impact the RCM will deploy the pretensioners provided the safety belt buckles are fastened. The safety belt buckle pretensioners have a lower deployment threshold than that required by the airbags. Hence it is possible during a minor
collision, which exceeds the deployment threshold and will deploy only the safety belt buckle pretensioners. Airbag Warning Indicator

Published: 10-Jul-2014
Supplemental Restraint System - Air Bag and Safety Belt Pretensioner
Supplemental Restraint System (SRS)
Diagnosis and Testing

Principle of Operation

For a detailed description of the supplemental restraints system and operation, refer to the relevant Description and Operation
section in the workshop manual. REFER to: (501-20B Supplemental Restraint System)

Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) (Description and Operation), Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) (Description and Operation), Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) (Description and Operation).
Inspection and Verification


WARNING: TO AVOID ACCIDENTAL DEPLOYMENT AND POSSIBLE PERSONAL INJURY, THE BACKUP POWER SUPPLY MUST
BE DEPLETED BEFORE REPAIRING OR REPLACING ANY AIR BAG SUPPLEMENTAL RESTRAINT SYSTEM (SRS) COMPONENTS. TO
DEPLETE THE BACKUP POWER SUPPLY ENERGY, DISCONNECT THE BATTERY GROUND CABLE AND WAIT ONE MINUTE. FAILURE
TO FOLLOW THIS INSTRUCTION MAY RESULT IN PERSONAL INJURY.


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.


NOTE: Given the legal implications of a restraints system failure, harness repairs to Air Bag module circuits are not
acceptable. Where the text refers to "REPAIR the circuit", this will normally mean the replacement of a harness.
1. Verify the customer concern.

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



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, check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index.

DTC Index

For a list of Diagnostic Trouble Codes (DTCs) that could be logged on this vehicle, please refer to Section 100-00.
REFER to: Diagnostic Trouble Code (DTC) Index - DTC: Restraints Control Module (RCM) (100-00 General Information, Description and Operation). Electrical

Battery condition, state of charge
Make sure all electrical connector(s) are engaged correctly on the air bag circuits
Wiring harness
Air bag module(s)
Make sure the restraints control module (RCM) is correctly installed
Fuse(s)
Sensor(s)
Pretensioner(s)
Warning lamp bulb(s) Visual Inspection
www.JagDocs.com

Published: 11-May-2011
Supplemental Restraint System - Occupant Classification Sensor
Removal and Installation

Removal

WARNINGS:


To avoid accidental deployment, the restraints control module backup power supply must be depleted. Wait at least one
minute after disconnecting the battery ground cable(s) before commencing any repair or adjustment to the supplemental
restraint system (SRS), or any component(s) adjacent to the SRS sensors. Failure to follow these instructions may result in
personal injury.


Always wear safety glasses when working on an air bag equipped vehicle and when handling an air bag module. Failure to
follow this instruction may result in personal injury.


To minimize the possibility of premature deployment, do not use radio key code savers when working on the
supplemental restraint system. Failure to follow this instruction may result in personal injury.


To minimize the possibility of injury in the event of premature deployment, always carry a live air bag module with the
bag and trim cover pointed away from the body. Failure to follow this instruction may result in personal injury.


To minimize the possibility of premature deployment, live air bag modules must only be placed on work benches which
have been ground bonded and with the trim cover facing up. Failure to follow these instructions may result in personal injury.


Never probe the electrical connectors of air bag modules or any other supplemental restraint system component. Failure
to follow this instruction may result in personal injury.


Painting over the driver air bag module trim cover or instrument panel could lead to deterioration of the trim cover and air
bags. Do not for any reason attempt to paint discoloured or damaged air bag module trim covers or instrument panel. Install a
new component. Failure to follow this instruction may result in personal injury.
CAUTIONS:


The front passenger seat occupant classification sensor is available only as a service kit. No attempt should be made to
replace individual components. Failure to follow this instruction may result in personal injury.


Check for correct operation of the front seat after completion of the procedure to make sure that the wiring harness has
not become trapped or stretched.
NOTES:


Note the routing of the seat harness.


Some variation in the illustrations may occur, but the essential information is always correct.

1. Make the air bag supplemental restraint system (SRS) safe.

Refer to: Standard Workshop Practices (100-00 General Information, Description and Operation).

2. Refer to: Battery Disconnect and Connect (414-01 Battery, Mounting and Cables, General Procedures).

3. Refer to: Front Seat Backrest Cover (501-10 Seating, Removal and Installation).

Supplemental Restraint System - Passenger Air Bag Module
Removal and Installation Published: 11-May-2011


Removal


NOTE: Removal steps in this procedure may contain installation details.

1. Refer to: Battery Disconnect and Connect (414-01 Battery, Mounting and Cables, General Procedures).

2. Refer to: Steering Wheel (211-04 Steering Column, Removal and Installation).

3. Refer to: Driver Side Register (412-01 Climate Control, Removal and Installation).

4. Refer to: Information and Entertainment Display (415-01A Information and Entertainment System, Removal and Installation).

5. Refer to: Instrument Panel Speaker (415-01A Information and Entertainment System, Removal and Installation).

6. Refer to: A-Pillar Trim Panel (501-05 Interior Trim and Ornamentation, Removal and Installation).

7. Refer to: Audio and Climate Control Assembly (415-01A Information and Entertainment System, Removal and Installation). 211-326
Locking Tool, Clockspring Special Tool(s)

Published: 11-May-2011
Supplemental Restraint System - Restraints Control Module (RCM)
Removal and Installation

Removal


NOTE: Removal steps in this procedure may contain installation details.

1. Make the air bag supplemental restraint system (SRS) safe.

Refer to: Standard Workshop Practices (100-00 General Information, Description and Operation).


2. WARNING: To avoid accidental deployment and possible personal injury,
the backup power supply must be depleted before repairing or replacing
any air bag supplementary restraints system (SRS) components. To
deplete the backup power supply energy, disconnect the battery ground
cable and wait for one minute. Failure to follow this instruction may
result in personal injury.

Refer to: Battery Disconnect and Connect (414-01 Battery, Mounting and Cables, General Procedures).

3.
4.

1 RH (right-hand) hood actuator 2 Pedestrian protection system control module 3 LH (left-hand) hood actuator 4 LH accelerometer 5 RH accelerometer

Published: 11-May-2011
Pedestrian Protection System - Pedestrian Protection System - System
Operation and Component Description
Description and Operation

Control Diagram

NOTE: A = Hardwired; D = High speed CAN (controller area network) bus; N = Medium speed CAN bus


Item Description 1 Battery 2 CJB (central junction box) 3 Instrument cluster 4 LH (left-hand) hood actuator 5 RH (right-hand) hood actuator 6 Pedestrian protection system control module

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.
www.JagDocs.com