Chapter V Air Bag
Section I
Composition, Principle and Safety Rules for Maintenance
I. Composition & layout of air bag system
LF7162 adopts electronic double-air-bag system, with air bag in the central ornamental cap of
steering wheel and in the dash board in front of the passenger respectively. The whole air bag
system is mainly composed of driver air bag module (DAB), front passenger air bag module (PAB),
air bag clock spring (SRS CS), air bag electronic control unit (SRS ECU), safety belt
pre-tensioners for driver side and front passenger side (deluxe scheme), air bag harness, warning
label, and so on. Air bag system layout for LF7162 is illustrated in Fig. 5-1.
1. Air bag ECU (Electronic Control Unit)
The air bag ECU assembly is installed at the central axis of the vehicle, under the central control
panel, as shown in Fig. 5-1.
Fig. 5-1
The air bag ECU can keep in operation for over 100ms under the circumstances that the battery
voltage drops too low or the power supply disconnects because of collision. Two models of the air
bag are involved in the LF7162: the two circuits and four circuits which must work simultaneously
with the front pre-tensioned safety belt.
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