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Primary Safety Seatbelts (Main Primary Safety) Anti-Submarining Seats Vehicle Design Exterior /Interior
Seat Belt Legislation Front Seat Belt Fitting Made Mandatory in 1965 Rear Seat Belt Fitting Made Mandatory in 1986 Front Seat Belt Wearing Made Mandatory in 1982 Rear Seat Belt Wearing Made Mandatory in 1991
Supplementary Safety Airbags Seat Belt Pre-tensioners
Airbag Deployment Impact Angle 60° Front Impact Severe Frontal Impact Required Impact Force Approximately 2- 3 G or mph in to a Solid Object
Airbag Deployment Impact Angle Side Impact Severe Side Impact
Airbag Protection Steering Wheel Airbags Reduce Driver Fatalities By 23% In Frontal And Angular Impacts
Airbag Safety Issues Passenger Airbags and Small People Possible Facial and Upper Torso Injuries Possible Burns and Fume Inhalation Vehicle Accident Rescue Operation
SRS Warning Lamps
SRS Warning Stickers
SRS Components Power Supply Fuse Diagnostic and Control Unit (DCU) Airbag/s Rotary Coupler Crash Sensor (Early Vehicles) SRS Wiring Harness Seat Belt Pre-tensioners Side Impact Sensors
SRS DCU Safing and Crash Sensors Single Point Sensing Multi-point Sensing System Control and Self Check Back up Power Circuit Contains Sensors Used to Detect Severe Collision to Warrant SRS Deployment
Early Type Crash Sensors (Rolamite)
Rotary Coupling
Steering Wheel Cover With Break Lines Airbag Ignition Charge 5 Initiator (Squib) Fuel Tablets 7 Heat Exchanger And Filter Drivers Airbag
Passengers Airbag 1.Electrical Connector 2.Nitrocellulose Chamber (Containing Squib) 3.Mixing Chamber 4.Gas Release Port 5.Pressurised Nitrogen/argon Gas Chamber 6.Filter 7.Folded Nylon Bag 8.Housing 9.Paper Cover
Side Impact Sensor Green Rover 45 Black Rover 75
Thorax Bag
Thorax Bag Deployment
Side Head Impact Protection Inflatable Tubular Structure
Front Seat Belt Pre-tensioner (Buckle Type) Rover 200 Rover 25 Rover 75 MGF
Pre-tensioner 1.Outer Casing 2.Wiring 3.Initiator 4.Propellant 5.Retaining Plate 6.Gas Choke 7.Piston & Cable 8.Seal 9.Seal Housing 10.Clutch
Seatbelt Pre-tensioner Operation 1Electrical Firing Signal Ignites Initiator (12v)
Seatbelt Pre- Tensioner Operation 2 Fuel Burns Producing Gas Which Escapes Through Control Vents
Seatbelt Pre- Tensioner Operation 3 Gas Pressure Forces Piston Along Tube
Rover 400/45 Front Pre Tensioners 1. Pre-tensioner Prior to Firing 2. Gas Generator Produces Nitrogen 3. Gas Pressure Forces Rotor to Turn 4. As Rotor Turns, Webbing Is Wound Onto Reel 5. Rotor Reaches Limit of Travel, Gas Is Exhausted to Atmosphere
Rover my 1.Safety Switch 2. Seatbelt Webbing
1. Depress Stopper Lever 2. Turn Lever and Protector Pin 90° Anti-clockwise 3. Lift Protector Pin 4. Fold Protector Pin Flat Against Bracket and Ensure Clip Is Engaged B. Safe Position Rover my
Rover 75 Rear Pre Tensioner
Rover 75 Rear Pre Tensioner Operation 1.Gas generator 2.Rack 3.Outer gear 4.Inner gear 5.Hub 6.Roller 7.Spool 8.Seat belt
System Operation Normal Driving Position - Driver Wearing A Three Point Seat Belt
System Operation 15 Milliseconds (0.015 Sec) After Frontal Collision DCU Detected Severe Frontal Collision Safing Sensor Confirmed Rapid Deceleration DCU Sent Firing Voltage To Pyrotechnic Devices,Driver Still In Upright Position
System Operation 30 Milliseconds (0.030sec) After Impact Airbag Inflating Very Rapidly ( Mph) Driver Being Thrown Forward Against Seatbelt Webbing
System Operation 40 Milliseconds (0.040sec) After Impact Airbag Fully Inflated Drivers Head Strikes Airbag, Airbag Vents Through Holes / Porous Material.Venting Provides Cushioning To The Drivers Head
System Operation 120 Milliseconds (0.12 Sec) After Impact Drivers Head Moves Back Towards Seat Airbag Deflates
MINI 97 on 1. Driver Airbag. 2. Seatbelt Pre-tensioner 3. SRS Warning Light. 4. DCU. 5. Rotary Coupler. 6. SRS Harness.
Rover 100 & Early 200/400 XW 1.Driver Airbag Module 2. SRS Warning Light 3. DCU 4. Rotary Coupler 5. SRS Harness 6. SRS Fuse 7. Fusebox
Rover my 1.Passenger Airbag Module 2. Driver Airbag Module 3. SRS Warning Light 4. DCU 5. Rotary Coupler 6. SRS Harness 7. Seatbelt Pre-tensioner 8. Seatbelt Pre-tensioner
Rover 400 ED3 1.Airbag Module 2. SRS Warning Light 3. DCU 4. Rotary Coupler 5. SRS Harness 6. Fusebox
Rover 400 Twin bag 1.Driver Airbag Module 2. SRS Warning Light 3. DCU 4. Rotary Coupler 5. SRS Harness 6. Fusebox 7. Passenger Airbag Module
Rover 600 SRS II 1. Airbag Mounting Bolt 2. Steering Wheel 3. DCU LED 4. Access Panel
Rover 600 SRS II DTC Codes
Rover 600 SRS III 1. Drivers Air Bag Module 2.Rotary Coupling 3. SRS Warning Lamp 4. Memory Erase Signal Connector 5. DCU 6. Service Check Connector 7. Data Link Connector 8. Passengers Airbag
Rover 600 SRS III Memory Erase Process
Rover 600 SRS III DTC Codes
Rover My on 1. Rotary Coupler 2. SRS Warning Light 3. Driver Airbag 4. J1962 Diagnostic Connector 5. DCU 7. Passengers Airbag 8. Seatbelt Pre-tensioner (Saloon) 9. Seatbelt Pre-tensioner (Coupe) 10. Connector - Pre-tensioner
Rover 25 1.R/H Seat Belt Pre –Tensioner 2.DCU 3.L/H Seat Belt Pre – Tensioner 4.Rotary Coupler 5.Drivers Airbag 6.Diagnostic Socket 7.Passengers Airbag 8.Warning Lamp
Rover 45 1 & 2.Thorax Bags 3 & 12. Seat Belt Pre – Tensioners 4 & 11. Side Impact Sensors 5. Rotary Coupler 6. Drivers Airbag 7. Diagnostic Socket 8. DCU 9. Passengers Airbag 10. Warning Lamp
MGF 1. Driver’s Airbag Module 2. SRS Warning Light 3. Diagnostic Control Unit 4. Rotary Coupler 5. SRS Harness (YELLOW) 6. Fuse/Relay Box 7. Passenger’s Airbag Module (Optional) 8. Seat Belt Pre-tensioners 9. Diagnostic Socket
Rover 75 1 SRS Warning Lamp 2 Rotary Coupler 3 Driver’s Airbag Module 4 Crash Sensor – Side Impact (RH Side) 5 Diagnostic Connector 6 Diagnostic and Control Unit (DCU) 7 Crash Sensor – Side Impact (LH Side) 8 SRS System Earth Header 9 Passenger's Airbag Module
Rover 75 1 Inflatable Tubular Structure (ITS) Airbag (RH & LH) 2 Rear Seat Belt Pre-tensioners (3 Off) 3 Side (Thorax) Airbag – LH Seat 4 Front Seat Belt Pre-tensioner (LH) 5 Front Seat Belt Pre-tensioner (RH) 6 Side (Thorax) Airbag – RH Seat
SRS Deployment
ROVER 75/45 Front Impact Deployed
Rover 75 Rear Impact Deployed
Rover 75/45 Side Impact Deployed
Rover 75/45 Severe Angle Impact Deployed
Diagnostic Safety Precautions DCU Back up Power - Power Down 10 Minute Safe Period Do Not Use Test Meters Other Than Testbook Pyrotechnic Storage Governed by ‘the Explosive Act’ When Removed From the Vehicle Stored According to Legal Regulations
Component Replacement Strategy
Harness Replacement Strategy Rover 25, 75 MGF (Later ECD3) Cars Have SRS Harnesses Integrated Into the Main Harness Firing Circuits to Be Cut Away and Replaced As Section Rover 45, MGF (Pre ECD3) & All Non Current Vehicles Use Separate SRS Harnesses Replace Relevant Harness
Harness Repair
SRS Precautions (Storage) Ensure the Components Are Kept Dry Store Airbag Module With Pad Face up Do Not Allow Anything to Rest on the Airbag Store Airbag Module on a Flat Surface Away From Electrical Equipment, High Heat Source, Oil, Grease and Detergent
SRS Precautions (Storage) Store Pyrotechnic Devices in an Approved Steel Cabinet, Registered With the Local Authority If No Designated Storage Space Area Is Available, the Airbag Module Should Be Locked in the Luggage Compartment for Short Storage Times. The Workshop Supervisor Must Be Informed
SRS Precautions (Always) Carefully Inspect SRS Components Before Installation Ensure SRS Connectors Are Correctly Mated and Latched
SRS Precautions (Always) Carry Only One Airbag Module at a Time Carry Airbag Modules With the Cover Facing Upwards Use the Correct Bolts Tightened to the Specified Torque
SRS Precautions (Never) Drop an SRS Component Wrap Arms Around the Airbag Module Attach Anything to the Airbag Cover Attempt to Dismantle Any Component Apply Electrical Power to a Component Unless Directed to Do So by an Approved Test Procedure
SRS Precautions (Never) Transport Airbag Modules in the Passenger Compartments of Vehicles Install Components That Show Signs of Abuse Install Used Parts From Another Car
Component Disposal Use Tool SMD 4082 Old Pyrotechnic Devices Must Be Manually Deployed Unless Requested by Rover Deployed in Car or on a Bench Tool Self Test Tool Connection Deploy One Air bag at a Time Follow Safety Precautions
Diagnostics & Harness Repair