资料教案成果32科雷傲airbag seatbelt

1、 ContentsCONTENTS1. Introduction2. Structure3. Collision Diagnosis4. System Diagnosis5. Crash Output System6. Diagnosis Precautions Service Training Team2/151. Airbag System StructureDrivers side seat belt pre-tensioner is controlled in 2 stages.Components parts-SRS airbag control unit-Airbag module

2、 (driver, passenger)-Side airbag module-Curtain airbag module-Seat belt pre-tensioner-Spiral cable-Impact sensor-SRS airbag warning light pre-tensioner FR-LH Pre-tensioner FR-LH-2 LH side sensor LH side airbag module LH curtain airbag modulePre-tensioner FR-RHFront impact sensorRH side sensorRH side

3、 airbag moduleRH curtain airbag module airbag module (driver)Airbag module (passenger)Airbag C/U-Auxiliary power-Drive circuit-CPU-G sensor-Safing algorithm Service Training Team3/152. Airbag System ComponentsCollision DetectionPre-tensionersAirbag modulesFront impact sensor and side impact sensorsD

4、rivers side pre-tensioner (2 stages), passengers pretensionerDrivers and passengers airbag modules and side and curtain airbag modulesDetecting collisionPre-tensionerAirbag module Service Training Team4/153. 2-stage Drivers side Pre-tensionerStage 1Stage 2Stage 1Stage 2Stage 1Stage 2Protects the pas

5、sengers head and chest areas in case of a collision with an impact exceeding pre-determined limit.Protects the passengers hip area in case of a collision with an impact exceeding pre-determined limit. Service Training Team5/154. Passengers side Airbag Lock SwitchPassengers side airbag lock switchPas

6、sengers side airbag status indicatorInstrument panel displayThis switch toggles the passenger front airbag module on or off in case of a collision with an impact exceeding pre-determined limit. If turned off, the passenger front airbag module, seatbelt pre-tensioner and side airbag module is deactiv

7、ated and the warning light at the top of the center pillar will be turned on and the vehicle information display on the instrument panel will show a message to warn the user of the current state. Service Training Team6/155. Impact Sensors1. Front impact sensor2. Side impact sensors3. Control unit (G

8、 sensor, safing algorithm)Detecting collisionPre-tensionerAirbag module Service Training Team7/156. Impact sensorsFront impact sensorSide impact sensor Service Training Team8/157. SRS Airbag System Diagnosis FunctionAirbag control unit informs users by warning lamp when the system is abnormal, and i

9、t is normal if it turns off warning lamp in about 7 seconds after ignition switch is ON.If warning lamp is not turned off after 7 seconds, it is as abnormal system case that airbag system might not be operated when in collision. The lighting state of a warning lamp is to be controlled differently ac

10、cording to the defect contents of a systemAirbag warning lampCLIP Service Training Team9/157-1. Flashing of airbag warning lamp according to faultsAirbag warning light indicationStatus of airbag systemNormalTrouble exist.Abnormal battery voltage(9V or less, 16V or more)-when airbag module & Pre-

11、tensioner deployed-When harness, connector, control unit is abnormal-airbag warning light is abnormal-When harness, connector, control unit is abnormal 7 SIGN ONIGN ON 7 SIGN ON7 SIGN ON Service Training Team10/158. Fault Finding by Using CLIPPresent faultsErase faultsThe item marked with red color

12、means current faults that airbag system occurred. We shall certainly erase faults memory after having fixed with malfunction. Service Training Team11/159. Airbag System Diagnosis by Using SST (Dummy)Airbag dummy (internal resistance 2.5 )1. A dummy is a type of SST that has an equal resistance value

13、 for the pretensioner of the airbag system or the resistor of the airbag module. 2. Types of dummies (3 types depending on the shape of the connector for different airbag system components) - Dummy A: Drivers and passengers front airbags, curtain airbag, pretensioner - Dummy B: Drivers pretensioner

14、2 - Dummy C: Drivers and passengers side airbag3. Simple diagnosis using dummy - If the self-diagnosis result on the CLIP shows a present fault, connect the appropriate dummy for the fault code to the operation module or pretensioner concerned, and check whether the fault changes to stored fault. If

15、 the fault changes to stored fault, module or pretensioner fault can be suspected. If the fault remains present, harness fault, etc. can be suspected.Airbag dummy for RENAULT Service Training Team12/15Airbag Module(driver position)ACUSpiralcable+-OKDF003 driver position front airbag module CO (open)

16、 Service Training Team13/1510. Crash Output SystemInjection computer U C H1.DOOR UNLOCK Airbag C/U UCH Door unlock, Flicking of hazard lamp, Steering column unlock2.ENGINE STALL(FUEL CUT) Airbag C/U Injection computer Fuel cutFuel cut Service Training Team14/1510-1. The engine stall according to CRA

17、SH OUTPUT system.Repair mode (Injection computer)Click with fault memoryClick with erase faults Service Training Team15/15Precautions for Checking SRS Airbag System 1.Pretensioner seatbelt connector should be connected/disconnected 1.Pretensioner seatbelt connector should be connected/disconnected w

18、hen every seatbelt anchor section is connected. when every seatbelt anchor section is connected. 2.If replaced or removed/installed SRS airbag components and pretensioner seatbelt, 2.If replaced or removed/installed SRS airbag components and pretensioner seatbelt, check the normalcy through SRS airb

19、ag warning light. check the normalcy through SRS airbag warning light. 3.Never reuse the pre-tensioner seatbelt assembly after operation under collision. 3.Never reuse the pre-tensioner seatbelt assembly after operation under collision. 4.Never shock by dropping or so. If impacted, replace it. 4.Nev

20、er shock by dropping or so. If impacted, replace it. 5.If seatbelt assembly should be replaced, use only genuine part. 5.If seatbelt assembly should be replaced, use only genuine part. 6.Never use circuit tester to check the SRS circuits. 6.Never use circuit tester to check the SRS circuits. 7.Before service on the SRS system, turn the ignition switch off, disconnect both7.Before service on the SRS system, turn the ignition switch off, disconnect both battery cables and wait for more than 3 minutes. battery cables and wait for more than 3 minutes. 8.Carefu