Jeep 1996 Grand Cherokee Service Manual - page 624
8W-43 AIRBAG SYSTEM
INDEX
page
page
DESCRIPTION AND OPERATION
AIRBAG IMPACT SENSORS . . . . . . . . . . . . . . . . . 1
AIRBAG SQUIB (AIRBAG IGNITER) . . . . . . . . . . . 1
AIRBAG WARNING LAMP . . . . . . . . . . . . . . . . . . 1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . 1
SCHEMATICS AND DIAGRAMS
WIRING DIAGRAM INDEX . . . . . . . . . . . . . . . . . . 1
DESCRIPTION AND OPERATION
INTRODUCTION
This vehicle has a drivers airbag and a passengers
airbag. The Airbag Control Module (ACM) operates
both. The airbag system has two sensors, located at
the left front and right front of the engine compart-
ment.
In the START or RUN position, the ignition switch
connects circuit A1 from fuse 8 in the Power Distri-
bution Center (PDC) to circuit A22. Circuit A22 pow-
ers circuit F20 through fuse 22 in the junction block.
Circuit F20 connects to the ACM.
When the ignition switch is in the RUN position, it
connects circuit A1 to circuit A21. Circuit A21 powers
circuit G5 through fuse 4 in the junction block. Cir-
cuit G5 connects to the ACM. Circuit Z6 provides
ground for the ACM.
Circuit A250 from fuse 11 in the PDC powers cir-
cuit F75 through fuse 7 in the junction block. Circuit
F75 powers the airbag warning lamp in the instru-
ment cluster.
AIRBAG IMPACT SENSORS
Two airbag impact sensors provide input to the air-
bag control module (ACM). Each sensor has two cir-
cuits that connect to the ACM.
From the left impact sensor, Circuits R47 and R49
connect to the ACM.
From the right impact sensor, Circuits R46 and
R48 connect to the ACM.
AIRBAG SQUIB (AIRBAG IGNITER)
Circuits, R43 and R45, connect the ACM to the
drivers airbag squib (igniter) after passing through
the clock spring connector. Circuit R43 from cavity 3
of the ACM 4-way connector connects to the squib.
Circuit R45 from cavity 4 of the ACM 4-way connec-
tor connects to the squib.
Circuits, R42 and R44, connect the ACM to the
passenger airbag squib (igniter). Circuit R42 from
cavity 1 of the ACM 4-way connector connects to the
squib. Circuit R44 from cavity 2 of the ACM 4-way
connector connects to the squib.
AIRBAG WARNING LAMP
Circuit F75 from fuse 7 in the junction block feeds
the airbag warning lamp. Ground circuit Z1 connects
to the warning lamp through a transistor controlled
by the microprocessor in the instrument cluster.
When the microprocessor receives a signal from Air-
bag Control Module (ACM) on the CCD bus, it
switches the transistor to connect the lamp to
ground.
SCHEMATICS AND DIAGRAMS
WIRING DIAGRAM INDEX
The following index covers all components found in
this section of the wiring diagrams. If the component
you are looking for is not found here, refer to section
8W-02 for a complete list of all components shown in
the wiring diagrams.
ZJ
8W - 43 AIRBAG SYSTEM
8W - 43 - 1