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SUPPLEMENTARY RESTRAINT SYSTEM (SRS)
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1.7.2.5. CLOCK SPRING
Clock spring is a spirally wound wire coil (not a
slip ring) mounted to steering column. This single-
wire type contact reel (clock spring) design
ensures most reliable contact possible between
air bag module assembly and SRS ECU. It also
provides the electrical continuity for airbag, horn,
vehicle cruise control and infotainment system.
The clock spring only needs to be replaced when
the connectors that attach to the driver’s airbag is
melted and fused directly to the DAB module.
During a deployment the gas conversion creates a
heat exchange inside the DAB module and that
causes connectors to melt.
LOCATION
It is mounted on the steering column along with
the Combi-switch.
CONNECTOR
A. BOTTOM SIDE CONNECTOR
PINOUT DETAILS
TRACK
FUNCTION
– VE
Air Bag
+ VE
Air Bag
1
Infotainment switch
2
Infotainment Ground
3
Cruise Switch
4
Cruise Ground
5
Horn Switch (+Ve)
6
Horn Switch (-Ve)