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3.14.3 ELECTRICAL INPUTS
Module battery supply - Battery input is on the
nut and bolt connector of the IPM. This supplies
battery voltage for all IPM operations.
Power ground - Ground source on pin 14 of
connector C5 for all IPM operations.
Ignition switch RUN or START position sta-
tus - 12 volt input on pin 13 of connector C9. Allows
the IPM to determine the ignition switch status for
related IPM operations.
Ignition switch START only status - 12 volt
input on pin 4 of connector C4. And allows the IPM
to discriminate between RUN/START input and
START for related IPM operations.
PCI Bus - Approximately 7.5 volt input on pin 11of
connector C4.and allows the IPM to communicate
with other modules on the vehicle bus.
Brake sense status - The stop light switch sense
tells the IPM to de-energize the BTSI when the
ignition is in Run, Start or Accessory positions for
brake shift interlock function.
Horn Switch - Horn signal input on pin 2 of
connector C4. The signal tells the IPM to provide
power to the horn.
Wiper park switch - Ground input on pin 3 of
connector C4. Used to determine park placement of
wipers. Also used as feedback to the IPM to deter-
mine correct operating mode of wipers.
Washer fluid level switch - Ground input to
pull-up on pin 3 of connectorC5. Ground is
switched into the circuit when washer bottle fluid
level is low.
Brake fluid level switch - Ground input to
pull-up on pin 8 of connector C8. Ground is
switched into the circuit when brake fluid level is
low.
Battery IOD - The IPM enters a low power con-
sumption mode when the ignition is turned OFF.
This low current draw battery supply keeps the
microprocessor functioning in the low power mode.
The IOD fuse can be inserted two ways. The IGN
designation on the face of the IPM is the SHIP-
PING position. The B+ designation on the face of
the IPM is the NORMAL RUN position. If the
ignition switch is off and the fuse is in the SHIP-
PING position, there will be no RKE or door lock
functions.
Flash programming voltage - When a DRBIII
is connected and the proper flash reprogramming
sequence is selected, the 20 volt signal will be
applied through pin 5 of connector C9.
GENERAL INFORMATION
CAUTION:
The
Learned Features when it is connected to a
vehicle, therefore it is not recommended that
IPM's be swapped from one vehicle to
another or false DTC's could be stored in the
module and could not be erased.
3.15 INTERIOR LIGHTING
3.15.1 COURTESY LAMP CONTROL
The Body Control Module (BCM) has direct con-
trol over all of the vehicle's courtesy lamps except
for the driver and passenger front courtesy lamps.
The Driver Door Module (DDM) and the Passenger
Door Module (PDM) turn these lamps on based on
requests sent over the PCI Bus from the BCM. The
courtesy lamps will illuminate if:
•
Any door is ajar and the courtesy lamp switch on
the headlamp switch is not in the dome off
position.
•
The courtesy lamp switch on the headlamp
switch is in the dome on position.
•
A Remote Keyless Entry unlock message is re-
ceived.
•
The operator unlocks the driver door with the
key (with VTSS only).
3.15.2 ILLUMINATED ENTRY
Illuminated entry will be initiated when the
customer enters the vehicle by unlocking the doors
with the key fob, or with the key if the vehicle is
equipped with vehicle theft alarm. Upon exiting
the vehicle, if the lock button is pressed with a door
open, illuminated entry will cancel when the door
closes. If the doors are closed and the ignition
switch is turned on, the illuminated entry also
cancels. The illuminated entry feature will not
operate if the courtesy lamp switch is in the dome
off position.
3.15.3 INTERIOR LIGHTING BATTERY
SAVER
If any of the interior lamps are left on after the
ignition is turned off, the BCM will turn them off
after 8 minutes. To return to normal operation, the
courtesy lamps will operate after the dome lamp
switch or door ajar switch changes state. The glove
box and switched reading lamps require that the
ignition be turned to the on/acc position.
31
IPM
will
learn
several
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