Controlled power feeds:
•
Front airbag system
•
Headlamp power
•
Tail lamps and side marker lamps
•
Front park lamps
•
Front side marker lamps
•
Front fog lamps
•
License plate lamp
•
Transmission control
•
Autostick
•
Brake transmission shift interlock (BTSI) sys-
tem
•
Front washer motor
•
Rear washer motor
Relay controls:
•
Front wiper on relay
•
Front wiper high/low relay
•
Accessory relay
•
Horn relay
•
Front blower relay
•
Rear booster fan relay
•
Electronic back light (EBL) relay
•
Run only relay
•
Door node relay
Electrical inputs:
•
Brake sense
•
Front wiper park
•
Washer fluid input
•
Horn switch
•
Wiper park switch
•
Brake fluid level switch
•
Run start sense
•
IOD/ Radio/ Clock sense
•
PCI bus
•
Flash reprogramming voltage
•
Ignition start sense
3.14.1
CONTROLLED POWER FEEDS
Front airbag system
The IPM provides power to the Occupant Restraint
Control (ORC) system through two
9fuse-less9 cir-
cuits (ORC RUN/START, and ORC RUN only).
These circuits are electronically controlled and
continuously monitored for malfunctions. Power is
supplied while the ignition switch is in the RUN
and START positions on pin 16 of the IPM connec-
tor C9, and in the RUN only position on pin 1 of the
IPM C4 connector.
Headlamp power
The headlamp switch is a direct input to the BCM.
The BCM sends a PCI Bus message to the IPM
informing it of a headlamp switch status change.
The IPM then turns on power to the headlamps
through four
9fuseless9 circuits. These circuits are
electronically controlled and continuously moni-
tored for malfunctions. Power is supplied to each
filament in a separate circuit. For vehicles
equipped with Daytime Running Lamps (DRL), the
IPM electronically steps down the headlamp volt-
age to provide the desired illumination.
Tail lamps and side marker lamps
When the IPM receives a message to turn on the
rear tail lamps and the side marker lamps, the IPM
will supply power to pin 15 of the C4 connector for
the right tail lamp and the right side marker lamp
and will provide power to pin 7 of the C9 connector
for the left tail lamp and left side marker lamp.
Front park lamps
When the IPM receives a message for front park
lamps on, the IPM will supply power to pin 26 of
connector C5 for the right lamp and pin 24 of the
C5 connector for the left lamp.
Front side marker lamps
When the IPM receives a message for front side
marker lamps on, the IPM will supply power to pin
6 of the C5 connector for the right front side
marker and pin 7 of the C5 connector for the left
side marker lamp.
Front fog lamps
When the IPM receives a message for front fog
lamps on, the IPM will supply power to pin 17 of
the C5 connector for the right lamp and pin 2 of the
C5 connector for the left lamp.
License plate lamp
When the IPM senses that the park lamps switch is
closed, the IPM will supply power through a high
side driver of the IPM.
Transmission Control
The electronic automatic 4 speed transmission con-
trol (which is internal to the PCM) is powered
when the ignition switch is in the RUN or START
position. This circuit is electronically controlled
and continuously monitored for malfunctions.
Autostick power
The autostick is powered when the ignition switch
is in the UNLOCK, RUN or START position. This
circuit is electronically controlled and continuously
monitored for malfunctions.
Brake transmission shift interlock (BTSI)
system
The brake shift interlock solenoid receives power
from a high side driver inside the IPM. The high
side driver control is hardwired to pin 19 of the
29
GENERAL INFORMATION