designed to provide safe, reliable, and centralized dis-
tribution points for the electrical current required to
operate all of the many standard and optional facto-
ry-installed

electrical

and

electronic

powertrain,

chassis, safety, security, comfort and convenience sys-

tems. At the same time, the power distribution sys-
tem was designed to provide ready access to these
electrical distribution points for the vehicle techni-
cian to use when conducting diagnosis and repair of
faulty circuits. The power distribution system can
also prove useful for the sourcing of additional elec-
trical circuits that may be required to provide the
electrical current needed to operate many accessories
that the vehicle owner may choose to have installed.

SPECIAL TOOLS

POWER DISTRIBUTION SYSTEMS

Terminal Pick Kit 6680

8W-97 POWER DISTRIBUTION SYSTEM

8W - 97 - 1

INTEGRATED POWER MODULE

DESCRIPTION

The Integrated Power Module (IPM) is a combina-

tion of the Power Distribution Center (PDC) and the
Front Control Module (FCM). The IPM is located in
the engine compartment, next to the battery. (Fig. 1).
The PDC mates directly with the FCM to form the
IPM. The PDC is a printed circuit board based mod-
ule that contains fuses and relays, while the FCM
contains the electronics controlling the IPM and
other functions. This IPM connects directly to the
battery positive through a four pin connector. The
ground connection is through two other connectors.
The IPM provides the primary means of voltage dis-
tribution and protection for the entire vehicle.

OPERATION

All of the current from the battery and the gener-

ator output enters the Integrated Power Module
(IPM) through a four- pin connector on the bottom of
the module. Internal connections of all of the power
distribution center circuits is accomplished by a com-
bination of bus bars and a printed circuit board.

REMOVAL

(1) Disconnect the negative and positive battery

cables.

(2) Remove the battery thermal guard.

(3) Remove the battery (Refer to 8 - ELECTRI-

CAL/BATTERY SYSTEM/BATTERY - REMOVAL).

(4) Using a flat-bladed screwdriver, twist the Inte-

grated Power Module (IPM) bracket retaining latch
outward to free the IPM from its mounting bracket
(Fig. 2).

(5) Rotate the IPM counter-clockwise to access and

disconnect the electrical connectors (Fig. 3).

(6) Remove the IPM bracket clips from the hinge.

Fig. 1 INTEGRATED POWER MODULE

1 - BATTERY THERMAL GUARD
2 - INTEGRATED POWER MODULE
3 - FRONT CONTROL MODULE

Fig. 2 INTEGRATED POWER MODULE

Fig. 3 DISCONNECTING IPM

1 - INTEGRATED POWER MODULE

8W - 97 - 2

8W-97 POWER DISTRIBUTION SYSTEM

INSTALLATION

(1) Snap the left side of the Integrated Power Mod-

ule (IPM) housing in its mounting bracket and con-
nect the various electrical connectors.

NOTE: Ensure that the Connector Positive Assur-
ance (CPA) on the five-pin B+ connector is posi-
tively engaged to prevent generating a Diagnostic
Trouble Code (DTC).

(2) Rotate the IPM clock-wise until secured in

mounting bracket. An audible click may be heard.

(3) Install the battery (Refer to 8 - ELECTRICAL/

BATTERY SYSTEM/BATTERY - INSTALLATION).

(4) Install the battery thermal guard.
(5) Connect the negative and positive battery

cables.

(6) Using a scan tool, check for any stored diagnos-

tic trouble codes. Ensure that all vehicle options are
operational.

IOD FUSE

DESCRIPTION

All vehicles are equipped with an Ignition-Off

Draw (IOD) fuse that is removed from its normal
cavity in the Integrated Power Module (IPM) when
the vehicle is shipped from the factory. Dealer per-
sonnel are to remove the IOD fuse from the storage
location and install it into the IPM fuse cavity
marked IOD as part of the preparation procedures
performed just prior to new vehicle delivery.

The IOD fuse is a 20 ampere blade-type mini fuse

and, when removed, it is stored in a fuse cavity adja-
cent to the washer fuse within the IPM.

OPERATION

The term ignition-off draw (IOD) identifies a nor-

mal condition where power is being drained from the
battery with the ignition switch in the Off position.
The IOD fuse feeds the memory and sleep mode func-
tions for some of the electronic modules in the vehicle
as well as various other accessories that require bat-
tery current when the ignition switch is in the Off
position, including the clock. The only reason the
IOD fuse is removed is to reduce the normal IOD of
the vehicle electrical system during new vehicle
transportation and pre-delivery storage to reduce
battery depletion, while still allowing vehicle opera-
tion so that the vehicle can be loaded, unloaded and
moved as needed by both vehicle transportation com-
pany and dealer personnel.

The IOD fuse is removed from the Integrated

Power Module (IPM) fuse cavity when the vehicle is
shipped from the assembly plant. Dealer personnel

must install the IOD fuse when the vehicle is being
prepared for delivery in order to restore full electrical
system operation. Once the vehicle is prepared for
delivery, the IOD function of this fuse becomes trans-
parent and the fuse that has been assigned the IOD
designation becomes only another Fused B(+) circuit
fuse. The IOD fuse serves no useful purpose to the
dealer technician in the service or diagnosis of any
vehicle system or condition, other than the same pur-
pose as that of any other standard circuit protection
device.

The IOD fuse can be used by the vehicle owner as

a convenient means of reducing battery depletion
when a vehicle is to be stored for periods not to
exceed approximately thirty days. However, it must
be remembered that removing the IOD fuse will not
eliminate IOD, but only reduce this normal condition.
If a vehicle will be stored for more than thirty days,
the battery negative cable should be disconnected to
eliminate normal IOD; and, the battery should be
tested and recharged at regular intervals during the
vehicle storage period to prevent the battery from
becoming discharged or damaged.

POWER OUTLET

DESCRIPTION

Two power outlets are installed in the instrument

panel center lower bezel. Two additional power out-
lets are incorporated into the left rear C-pillar and
the center console (if equipped). The power outlets
bases are secured by a snap fit. A hinged plug flips
closed to conceal and protect the power outlet base
when not in use.

OPERATION

The power outlet base or receptacle shell is con-

nected to ground, and an insulated contact in the
bottom of the shell is connected to battery current.
The power outlet on the instrument panel marked
with a battery receives battery voltage from a fuse in
the Integrated Power Module (IPM) at all times. The
other power outlet on the instrument panel marked
with a key receives battery voltage only when the
key is in the on position.

The power outlet located in the center console

receives battery voltage all the time when positioned
between the front seats and key-on voltage when
positioned between the rear seats. The power outlet
located on the C-pillar receives battery voltage only
when the key is in the ON position.

8W-97 POWER DISTRIBUTION SYSTEM

8W - 97 - 3

INTEGRATED POWER MODULE (Continued)

DIAGNOSIS AND TESTING

DIAGNOSIS & TESTING - POWER OUTLET

WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER TO RESTRAINTS BEFORE ATTEMPT-
ING ANY STEERING WHEEL, STEERING COLUMN,
SEAT OR INSTRUMENT PANEL COMPONENT DIAG-
NOSIS

SERVICE.

FAILURE

TAKE

THE

PROPER PRECAUTIONS COULD RESULT IN ACCI-
DENTAL AIRBAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.

(1) Check the fused B(+) fuse in the Integrated

Power Module (IPM). If OK, go to Step 2. If not OK,
repair the shorted circuit or component as required
and replace the faulty fuse.

(2) Check for battery voltage at the fused B(+) fuse

in the IPM. If OK, go to Step 3. If not OK, repair the
open fused B(+) circuit to the IPM fuse as required.

(3) Open the power outlet door. Check for continu-

ity between the inside circumference of the power
outlet receptacle and a good ground. There should be
continuity. If OK, go to Step 4. If not OK, go to Step
5.

(4) Check for battery voltage at the insulated con-

tact located at the back of the power outlet recepta-
cle. If not OK, go to Step 5.

(5) Disconnect and isolate the battery negative

cable. Remove the appropriate bezel. Check for conti-
nuity between the ground circuit cavity of the power
outlet wire harness connector and a good ground.
There should be continuity. If OK, go to Step 6. If not
OK, repair the open ground circuit to ground as
required.

(6) Connect the battery negative cable. Check for

battery voltage at the fused B(+) circuit cavity of the
power outlet wire harness connector. If OK, replace
the faulty power outlet receptacle. If not OK, repair
the open fused B(+) circuit to the IPM fuse as
required.

REMOVAL

(1) Disconnect and isolate the battery negative

cable.

(2) Note position of the retaining bosses (Fig. 4).
(3) Using external snap ring pliers with 90 degree

tips. Insert pliers with tips against bosses and
squeeze forcing bosses out of base.

(4) Pull out the base through mounting ring by

gently rocking pliers.

(5) Disconnect the base wires.
(6) Remove light ring and disconnect wire.

INSTALLATION

(1) Position the mounting ring on the instrument

panel and feed the wires through the ring. Index the
cap and the mounting ring with the index tab at the
9 o’clock position to the key in the instrument panel.
Install the ring.

(2) Connect the wires to the base. Orientate the

base alignment rib at the 11 o’clock position to mate
the groove in the mounting ring to the base.

(3) Push the base into the bezel until it locks in

place.

(4) Check operation of outlet or element and

install the outlet cap.

Fig. 4 POWER OUTLET

1 - RETAINING BOSSES-ENGAGE PLIERS HERE
2 - PARTIALLY REMOVED
3 - EXTERNAL SNAP-RING PLIERS
4 - PULL BASE OUT-THROUGH MOUNTING RING

8W - 97 - 4

8W-97 POWER DISTRIBUTION SYSTEM

POWER OUTLET (Continued)

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