SUPPLEMENTARY RESTRAINT SYSTEM (SRS) 18 SRS ECU FITMENT For fitment follow reverse procedure of removal. PRECAUTIONS If the ECU is accidentally dropped on the concrete floor from the height of more than 1m then that ECU should not be used on a vehicle. ECU should be transported with proper packing material. Always store the ECU in dry place. A person handling any restraints module assembly shall have to wear ESD (electro-static discharge) straps to reduce any risk of inadvertent deployment. NOTE: After removal / fitment of components – SRS ECU, Sensors, DAB, PAB, RPLL, connect service tool and check for DTCs to ensure the system behavior as expected. II SENSORS FRONT IMPACT SENSOR (FIS) These sensors are positioned well forward in the crumple zone so that, it will react almost instantly to the sudden deceleration that results from the front impact. They send signal to the SRS ECU and help in firing the restraints in the minimum possible time. These sensors are equipped with “Safe Mode” function to ensure that the SRS fires only when there is a physical crash event of significant severity. MAKE: BOSCH SUPPLY VOLTAGE RANGE: 5.25 V to 16.5 CAUTION Do not attempt to check or replace any impact sensor unless the vehicle battery is disconnected. This renders the sensing system "powered OFF". Wait for at least 10 minutes after the battery is disconnected and then start the relevant work/repair. LOCATION Front impact sensor is mounted on the first body mount bracket. CONNECTOR PINOUTS PIN NO. PIN DESCRIPTION 1 Signal 2 Ground SUPPLY VOLTAGE LEVEL Minimum 5.25 V Nominal 6.20 V Maximum 16.5 V
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