Jeep 1997 Grand Cherokee Service Manual page 1308

8W - 43 - 4
DESCRIPTION AND OPERATION
AIRBAG IMPACT SENSOR . . . . . . . . . . . . . . . . . 4
AIRBAG SQUIB (AIRBAG IGNITER) . . . . . . . . . . 4
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 SENSOR
The Airbag system uses a sensor internal to the
Airbag Control Module (ACM) to detect impact. For
8W - 43 AIRBAG SYSTEM
8W-43 AIRBAG SYSTEM
INDEX
page
information regarding operation of this sensor, refer
to the appropriate group of the Service Manual.
AIRBAG SQUIB (AIRBAG IGNITER)
drivers airbag squib (igniter) after passing through
the clock spring connector. Circuit R43 from cavity 2
of the ACM 4-way connector connects to the squib.
Circuit R45 from cavity 1 of the ACM 4-way connec-
tor connects to the squib.
passenger airbag squib (igniter). Circuit R42 from
cavity 5 of the ACM 4-way connector connects to the
squib. Circuit R44 from cavity 6 of the ACM 4-way
connector connects to the squib.
AIRBAG WARNING LAMP
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.
AIRBAG WARNING LAMP . . . . . . . . . . . . . . . . . . 4
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . 4
Circuits, R43 and R45, connect the ACM to the
Circuits, R42 and R44, connect the ACM to the
Circuit F75 from fuse 7 in the junction block feeds
ZG
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