2002 JEEP LIBERTY gate ajar

instrument cluster will turn on the gate ajar indica-
tor for the following reasons:
²Gate Ajar Lamp-On Message- Each time the
cluster receives a gate ajar lamp-on message from
the BCM indicating that the rear tailgate is open or
not completely latched, the gate ajar indicator will be
illuminated. If the vehicle is not moving when the
gate ajar lamp-on message is received, the VFD will
repeatedly and sequentially cycle its indication in
two second intervals with the odometer/trip odometer
information, the gate ajar warning, and any other
active warnings including: door ajar, glass ajar, and
low washer fluid. If the vehicle is moving, or once the
cluster of a non-moving vehicle receives an electronic
vehicle speed message from the Powertrain Control
Module (PCM) indicating a speed greater than zero,
the warning sequence will consist of three complete
display cycles, then revert to only the odometer/trip
odometer display until the tailgate ajar switch is
cycled. The gate ajar indicator will also be extin-
guished when the cluster receives a gate ajar lamp-
off message from the BCM, or if the ignition switch is
turned to the Off position, whichever occurs first.
The BCM continually monitors the tailgate ajar
switch that is integral to the tailgate latch to deter-
mine the status of the rear tailgate. The BCM then
sends the proper gate ajar lamp-on and lamp-off mes-
sages to the instrument cluster. For further diagnosis
of the gate ajar indicator or the instrument cluster
circuitry that controls the indicator, (Refer to 8 -
ELECTRICAL/INSTRUMENT CLUSTER - DIAGNO-
SIS AND TESTING). For proper diagnosis of the tail-
gate ajar switch and circuit, the BCM, the PCI data
bus, or the electronic message inputs to the instru-
ment cluster that control the gate ajar indicator, a
DRBIIItscan tool is required. Refer to the appropri-
ate diagnostic information.
GLASS AJAR INDICATOR
DESCRIPTION
A glass ajar indicator is standard equipment on all
instrument clusters. The glass ajar indicator consists
of the word ªglassº, which appears in place of the
odometer/trip odometer information in the Vacuum-
Fluorescent Display (VFD) of the instrument cluster.
The VFD is part of the cluster electronic circuit
board, and is visible through a cutout located near
the lower edge of the speedometer dial face in the
instrument cluster. The dark outer layer of the over-
lay prevents the VFD from being clearly visible when
it is not illuminated. The word ªglassº appears in the
same blue-green color and at the same lighting level
as the odometer/trip odometer information through
the translucent outer layer of the overlay when it isilluminated by the instrument cluster electronic cir-
cuit board. The glass ajar indicator is serviced as a
unit with the instrument cluster.
OPERATION
The glass ajar indicator gives an indication to the
vehicle operator that the rear flip-up glass may be
open or not completely latched. This indicator is con-
trolled by the instrument cluster electronic circuit
board based upon cluster programming and elec-
tronic messages received by the cluster from the
Body Control Module (BCM) over the Programmable
Communications Interface (PCI) data bus. The glass
ajar indicator function of the Vacuum Fluorescent
Display (VFD) is completely controlled by the instru-
ment cluster logic circuit, and that logic will only
allow this indicator to operate when the instrument
cluster receives a battery current input on the fused
ignition switch output (run-start) circuit. Therefore,
the VFD glass ajar indicator will always be off when
the ignition switch is in any position except On or
Start. The instrument cluster will turn on the glass
ajar indicator for the following reasons:
²Glass Ajar Lamp-On Message- Each time the
cluster receives a glass ajar lamp-on message from
the BCM indicating that the rear flip-up glass is
open or not completely latched, the glass ajar indica-
tor will be illuminated. If the vehicle is not moving
when the glass ajar lamp-on message is received, the
VFD will repeatedly and sequentially cycle its indica-
tion in two second intervals with the odometer/trip
odometer information, the glass ajar warning, and
any other active warnings including: door ajar, gate
ajar, and low washer fluid. If the vehicle is moving,
or once the cluster of a non-moving vehicle receives
an electronic vehicle speed message from the Power-
train Control Module (PCM) indicating a speed
greater than zero, the warning sequence will consist
of three complete display cycles, then revert to only
the odometer/trip odometer display until the glass
ajar switch is cycled. The glass ajar indicator will
also be extinguished when the cluster receives a
glass ajar lamp-off message from the BCM, or if the
ignition switch is turned to the Off position, which-
ever occurs first.
The BCM continually monitors the glass ajar
switch that is integral to the flip-up glass latch to
determine the status of the rear flip-up glass. The
BCM then sends the proper glass ajar lamp-on and
lamp-off messages to the instrument cluster. For fur-
ther diagnosis of the glass ajar indicator or the
instrument cluster circuitry that controls the indica-
tor, (Refer to 8 - ELECTRICAL/INSTRUMENT
CLUSTER - DIAGNOSIS AND TESTING). For
proper diagnosis of the glass ajar switch and circuit,
the BCM, the PCI data bus, or the electronic mes-
KJINSTRUMENT CLUSTER 8J - 21
GATE AJAR INDICATOR (Continued)

OPERATION
The washer fluid indicator gives an indication to
the vehicle operator that the fluid level in the washer
reservoir is low. This indicator is controlled by the
instrument cluster electronic circuit board based
upon cluster programming and a hard wired input
received by the cluster from the washer fluid level
switch mounted on the washer reservoir. The washer
fluid indicator function of the Vacuum Fluorescent
Display (VFD) is completely controlled by the instru-
ment cluster logic circuit, and that logic will only
allow this indicator to operate when the instrument
cluster receives a battery current input on the fused
ignition switch output (run-start) circuit. Therefore,
the LED will always be off when the ignition switch
is in any position except On or Start. The instrument
cluster will turn on the washer fluid indicator for the
following reasons:
²Washer Fluid Level Switch Input- Each time
the cluster detects ground on the low washer fluid
sense circuit (washer fluid level switch closed =
washer fluid level low) the cluster applies an algo-
rithm to confirm that the input is correct and not the
result of fluid sloshing in the washer reservoir. The
cluster tests the status of the circuit about seven mil-
liseconds after ignition On, and about once every sec-
ond thereafter, then uses an internal counter to
count up or down. When the counter accumulates
thirty ground inputs on the circuit, the washer fluid
indicator will be illuminated. If the vehicle is not
moving when the washer fluid level switch input
counter reaches thirty, the VFD will repeatedly and
sequentially cycle its indication in two second inter-
vals with the odometer/trip odometer information,
the low washer fluid warning, and any other active
warnings including: door ajar, gate ajar, and glass
ajar. If the vehicle is moving, or once the cluster of a
non-moving vehicle receives an electronic vehicle
speed message from the Powertrain Control Module
(PCM) indicating a speed greater than zero, the
warning sequence will consist of three complete dis-
play cycles, then revert to only the odometer/trip
odometer display. Once the washer fluid indicator
warning has completed, the washer fluid indicator is
extinguished and will not repeat until the ignition
switch is cycled.
The instrument cluster continually monitors the
washer fluid level switch in the washer reservoir to
determine the status of the washer fluid level. For
further diagnosis of the washer fluid indicator or the
instrument cluster circuitry that controls the indica-
tor, (Refer to 8 - ELECTRICAL/INSTRUMENT
CLUSTER - DIAGNOSIS AND TESTING). The
washer fluid level switch and circuits can be diag-
nosed using conventional diagnostic tools and meth-
ods. The washer fluid level switch also features a 3.3kilohm diagnostic resistor connected in parallel
between the switch input and output to provide the
cluster with verification that the low washer fluid
sense circuit is not open or shorted. This input can
be monitored using a DRBIIItscan tool. Refer to the
appropriate diagnostic information.
DIAGNOSIS AND TESTING - WASHER FLUID
INDICATOR
The diagnosis found here addresses an inoperative
washer fluid indicator condition. If the problem being
diagnosed is related to indicator accuracy, be certain
to confirm that the problem is with the indicator or
washer fluid level switch input and not with a dam-
aged or empty washer fluid reservoir, or inoperative
instrument cluster indicator control circuitry. Inspect
the washer fluid reservoir for proper fluid level and
signs of damage or distortion that could affect
washer fluid level switch performance and perform
the instrument cluster actuator test before you pro-
ceed with the following diagnosis. If no washer fluid
reservoir or instrument cluster control circuitry prob-
lem is found, the following procedure will help to
locate a short or open in the washer fluid switch
sense circuit. Refer to the appropriate wiring infor-
mation. The wiring information includes wiring dia-
grams, proper wire and connector repair procedures,
details of wire harness routing and retention, connec-
tor pin-out information and location views for the
various wire harness connectors, splices and grounds.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE SUPPLEMENTAL RESTRAINT
SYSTEM BEFORE ATTEMPTING ANY STEERING
WHEEL, STEERING COLUMN, DRIVER AIRBAG,
PASSENGER AIRBAG, SEAT BELT TENSIONER,
FRONT IMPACT SENSORS, SIDE CURTAIN AIRBAG,
OR INSTRUMENT PANEL COMPONENT DIAGNOSIS
OR SERVICE. DISCONNECT AND ISOLATE THE
BATTERY NEGATIVE (GROUND) CABLE, THEN
WAIT TWO MINUTES FOR THE SYSTEM CAPACI-
TOR TO DISCHARGE BEFORE PERFORMING FUR-
THER DIAGNOSIS OR SERVICE. THIS IS THE ONLY
SURE WAY TO DISABLE THE SUPPLEMENTAL
RESTRAINT SYSTEM. FAILURE TO TAKE THE
PROPER PRECAUTIONS COULD RESULT IN ACCI-
DENTAL AIRBAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
INDICATOR DOES NOT ILLUMINATE WITH WASHER
RESERVOIR EMPTY
(1) Disconnect and isolate the battery negative
cable. Disconnect the headlamp and dash wire har-
ness connector for the washer fluid level switch from
the washer fluid level switch connector receptacle.
Check for continuity between the ground circuit cav-
8J - 36 INSTRUMENT CLUSTERKJ
WASHER FLUID INDICATOR (Continued)

LAMPS/LIGHTING - INTERIOR
TABLE OF CONTENTS
page page
LAMPS/LIGHTING - INTERIOR
DESCRIPTION.........................65
OPERATION...........................67
DIAGNOSIS AND TESTING - LAMPS/
LIGHTING - INTERIOR..................68
SPECIFICATIONS - LAMPS/LIGHTING -
INTERIOR...........................71
ASH RECEIVER LAMP BULB
REMOVAL.............................71
INSTALLATION.........................71
ASH RECEIVER LAMP UNIT
REMOVAL.............................72
INSTALLATION.........................72
CARGO LAMP BULB
REMOVAL.............................72
INSTALLATION.........................73
CARGO LAMP SWITCH
REMOVAL.............................73
INSTALLATION.........................74
CARGO LAMP UNIT
REMOVAL.............................74
INSTALLATION.........................74
COMPASS MINI-TRIP ILLUMINATION BULB
REMOVAL.............................74
INSTALLATION.........................75
COURTESY LAMP BULB
REMOVAL.............................75
INSTALLATION.........................76
COURTESY LAMP UNIT
REMOVAL.............................76INSTALLATION.........................77
DOOR AJAR SWITCH
DESCRIPTION.........................77
OPERATION...........................77
FLIP-UP GLASS AJAR SWITCH
DESCRIPTION.........................77
OPERATION...........................77
HEATER-A/C CONTROL ILLUMINATION BULB
REMOVAL.............................78
INSTALLATION.........................78
READING LAMP BULB
REMOVAL.............................79
INSTALLATION.........................79
READING LAMP SWITCH
REMOVAL.............................80
INSTALLATION.........................80
READING LAMP UNIT
REMOVAL.............................81
INSTALLATION.........................81
TAILGATE AJAR SWITCH
DESCRIPTION.........................82
OPERATION...........................82
TRANSMISSION RANGE INDICATOR
ILLUMINATION BULB
REMOVAL.............................82
INSTALLATION.........................83
VANITY LAMP BULB
REMOVAL.............................83
INSTALLATION.........................84
LAMPS/LIGHTING - INTERIOR
DESCRIPTION
The interior lighting system (Fig. 1) for this model
includes the following incandescent interior lamps:
²Ash Receiver Lamp- An available ash receiver
lamp is located above the ash receiver housing
behind the instrument panel center bezel, and is con-
trolled by the panel lamps dimmer circuit.
²Cargo Lamp- An available cargo lamp with an
integral lens-actuated courtesy disable switch is
located in the headliner near the rear roof header,
and is controlled by the courtesy lamp circuit.
²Courtesy Lamps- Available courtesy lamps are
located below both the right and left side of the
instrument panel, and are controlled by the courtesy
lamp circuit.²Compass Mini-Trip Control Illumination
Lamps- The optional Compass Mini-Trip Computer
(CMTC) has three replaceable control illumination
bulb/bulb holder units on its circuit board that are
controlled by the panel lamps dimmer circuit.
²Dome Lamp- A standard front dome lamp that
does not include an on-off switch is located in the
headliner near the windshield header, and is con-
trolled by the courtesy lamp circuit.
²Hazard Switch Illumination/Indicator
Lamp- The hazard switch control button has a non-
replaceable illumination/indicator bulb soldered onto
its circuit board that is controlled by both the hazard
switch circuitry and the panel lamps dimmer circuit.
(Refer to 8 - ELECTRICAL/LAMPS/LIGHTING -
EXTERIOR/HAZARD SWITCH - DESCRIPTION).
²Heater-Air Conditioner Control Illumina-
tion Lamps- The heater-air conditioner control has
KJLAMPS/LIGHTING - INTERIOR 8L - 65

mission have an illuminated transmission range indi-
cator integral to the console mounted gearshift
mechanism, and controlled by the panel lamps dim-
mer circuit.
²Vanity Lamps- Available single intensity van-
ity lamps are located on each side of a covered mirror
on both the right and left sun visors, and are con-
trolled by an integral vanity mirror cover-actuated
switch on the courtesy lamp circuit.
Other components of the interior lighting system
for this model include:
²Body Control Module- The Body Control
Module (BCM) is located on the Junction Block (JB)
under the driver side outboard end of the instrument
panel. (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/BODY CONTROL MODULE
- DESCRIPTION).
²Door Ajar Switches- A door ajar switch is
integral to the door latch mechanism of each front
and rear door.
²Flip-Up Glass Ajar Switch- A flip-up glass
ajar switch is integral to the flip-up glass latch mech-
anism on the top of the tailgate inner panel.
²Multi-Function Switch- The multi-function
switch is located on the top of the steering column,
just below the steering wheel. The multi-function
switch includes a left (lighting) control stalk and a
right (wiper) control stalk. The left control stalk is
dedicated to providing almost all of the driver con-
trols for both the exterior and interior lighting sys-
tems. (Refer to 8 - ELECTRICAL/LAMPS/LIGHTING
- EXTERIOR/MULTI-FUNCTION SWITCH -
DESCRIPTION).
²Tailgate Ajar Switch- A tailgate ajar switch is
integral to the latch mechanism of the tailgate.
Hard wired circuitry connects the interior lighting
system components to the electrical system of the
vehicle. These hard wired circuits are integral to sev-
eral wire harnesses, which are routed throughout the
vehicle and retained by many different methods.
These circuits may be connected to each other, to the
vehicle electrical system and to the interior lighting
system components through the use of a combination
of soldered splices, splice block connectors, and many
different types of wire harness terminal connectors
and insulators. Refer to the appropriate wiring infor-
mation. The wiring information includes wiring dia-
grams, proper wire and connector repair procedures,
further details on wire harness routing and reten-
tion, as well as pin-out and location views for the
various wire harness connectors, splices and grounds.
OPERATION
The interior lighting systems can be divided into
two general classifications based upon the circuit
that controls their operation: The courtesy lamp cir-cuit, or the panel lamps dimmer circuit. Following
are paragraphs that briefly describe the operation of
each of the major interior lighting systems. The hard
wired circuits and components of the interior lighting
systems may be diagnosed and tested using conven-
tional diagnostic tools and procedures. However, con-
ventional diagnostic methods may not prove
conclusive in the diagnosis of the Body Control Mod-
ule (BCM), the ElectroMechanical Instrument Clus-
ter (EMIC), or the Programmable Communications
Interface (PCI) data bus network. The most reliable,
efficient, and accurate means to diagnose the BCM,
the EMIC, and the PCI data bus network inputs and
outputs related to the various interior lighting sys-
tems requires the use of a DRBIIItscan tool. Refer
to the appropriate diagnostic information.
COURTESY LAMP CIRCUIT Depending upon the
selected vehicle options the courtesy lamp circuit
may include the courtesy lamps located below the
instrument panel, the dome or map/reading lamps
located in the headliner near the windshield, the
cargo lamp located in the headliner near the rear
roof header, and the vanity lamps located in the sun
visors. The lamps in the courtesy lamp circuit are
provided with battery current at all times from a
fused B(+) fuse in the Junction Block (JB) through a
fused B(+) circuit. The Body Control Module (BCM)
controls the ground path for these lamps using an
internal driver through the courtesy lamp driver cir-
cuit based upon hard wired inputs from the door ajar
switches, the flip-up glass ajar switch, and the tail-
gate ajar switch. After all of the ajar switch inputs to
the BCM transition to open, the BCM will keep the
lamps illuminated for about 27 seconds, then fade
the lamps to off (theater dimming) over about three
seconds.
The BCM also provides courtesy lamp operation
based upon a resistor multiplexed input from the
interior lighting control ring on the left (lighting)
control stalk of the multi-function switch through the
headlamp switch mux circuit, and in response to cer-
tain inputs from the optional Remote Keyless Entry
(RKE) system. A resistor multiplexed courtesy lamp
defeat input from the control ring on the left (light-
ing) control stalk of the multi-function switch will
cause the BCM to override normal courtesy lamp
operation based upon inputs from all of the ajar
switches. A hard wired input from the courtesy lamp
defeat switch in the optional cargo lamp through a
rear courtesy lamp control circuit will cause the BCM
to override normal courtesy lamp operation based
upon inputs from only the flip-up glass and tailgate
ajar switches.
For those lamps on the courtesy lamp circuit with
independent switching, such as the optional reading
lamps and vanity lamps, the BCM provides a ground
KJLAMPS/LIGHTING - INTERIOR 8L - 67
LAMPS/LIGHTING - INTERIOR (Continued)

COURTESY LAMP CIRCUIT
CONDITION POSSIBLE CAUSES CORRECTION
A SINGLE LAMP IN THE
COURTESY LAMP
CIRCUIT DOES NOT
ILLUMINATE1. Faulty or missing bulb. 1. Test and replace the courtesy lamp bulb
as required.
2. Faulty lamp switch. 2. Test and replace a faulty map/reading
lamp switch, cargo lamp switch, or sunvisor
(vanity lamp switch) as required.
3. Faulty ground circuit. 3. Test and repair the open courtesy lamp
driver circuit as required.
4. Faulty ground circuit
(independently switched lamps only).4. Test and repair the open courtesy lamp
load shed circuit as required.
5. Faulty feed circuit. 5. Test and repair the open fused B(+)
circuit as required.
ALL LAMPS IN THE
COURTESY LAMP
CIRCUIT DO NOT
ILLUMINATE1. Faulty or missing fuse. 1. Test and replace the fused B(+) fuse
(IOD) in the Junction Block (JB) as
required.
2. Faulty ground circuit. 2. Test and repair the open courtesy lamp
driver circuit as required.
3. Faulty feed circuit. 3. Test and repair the open fused B(+)
circuit as required.
4. Faulty cargo lamp (courtesy
defeat) switch.4. Test and replace the cargo lamp switch
as required.
5. Faulty rear courtesy lamp control
circuit.5. Test and repair the shorted courtesy
lamp control circuit as required.
6. Faulty multi-function switch. 6. Test and replace the multi-function switch
as required.
7. Faulty Body Control Module
(BCM), BCM input, or BCM output.7. Use a DRBIIITscan tool to test the BCM,
its inputs, and its outputs. Refer to the
appropriate diagnostic information.
A SINGLE LAMP IN THE
COURTESY LAMP
CIRCUIT DOES NOT
EXTINGUISH1. Faulty lamp switch. 1. Test and replace a faulty map/reading
lamp switch, cargo lamp switch, or sunvisor
(vanity lamp switch) as required.
2. Faulty ground circuit. 2. Test and repair the shorted courtesy
lamp driver circuit as required.
ALL LAMPS IN THE
COURTESY LAMP
CIRCUIT DO NOT
EXTINGUISH1. Faulty ajar switch. 1. Test and replace a faulty door, tailgate,
or liftglass ajar switch as required.
2. Faulty ajar switch sense circuit. 2. Test and repair the shorted ajar switch
sense circuit as required.
3. Faulty ground circuit. 3. Test and repair the shorted courtesy
lamp driver circuit as required.
4. Faulty Body Control Module
(BCM), BCM input, or BCM output.4. Use a DRBIIITscan tool to test the BCM,
its inputs, and its outputs. Refer to the
appropriate diagnostic information.
KJLAMPS/LIGHTING - INTERIOR 8L - 69
LAMPS/LIGHTING - INTERIOR (Continued)

for the courtesy lamp from the connector receptacle
on the back of the lamp unit housing.
(4) Remove the courtesy lamp unit from under the
instrument panel.
INSTALLATION
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE SUPPLEMENTAL RESTRAINT
SYSTEM BEFORE ATTEMPTING ANY STEERING
WHEEL, STEERING COLUMN, DRIVER AIRBAG,
PASSENGER AIRBAG, SEAT BELT TENSIONER,
FRONT IMPACT SENSORS, SIDE CURTAIN AIRBAG,
OR INSTRUMENT PANEL COMPONENT DIAGNOSIS
OR SERVICE. DISCONNECT AND ISOLATE THE
BATTERY NEGATIVE (GROUND) CABLE, THEN
WAIT TWO MINUTES FOR THE SYSTEM CAPACI-
TOR TO DISCHARGE BEFORE PERFORMING FUR-
THER DIAGNOSIS OR SERVICE. THIS IS THE ONLY
SURE WAY TO DISABLE THE SUPPLEMENTAL
RESTRAINT SYSTEM. FAILURE TO TAKE THE
PROPER PRECAUTIONS COULD RESULT IN ACCI-
DENTAL AIRBAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
(1) Position the courtesy lamp unit under the
instrument panel.
(2) Reconnect the instrument panel wire harness
connector for the courtesy lamp to the connector
receptacle on the back of the lamp unit housing.
(3) Position the courtesy lamp unit to the lower
instrument panel (Fig. 10).
(4) Install and tighten the screw that secures the
integral mounting tab of the courtesy lamp unit to
the lower instrument panel.
(5) Reconnect the battery negative cable.
DOOR AJAR SWITCH
DESCRIPTION
This vehicle has four door ajar switches, one for
each door. Each switch is concealed within and inte-
gral to its respective door latch unit. The switches
are momentary leaf contact-type units that are actu-
ated by the door latch mechanisms. A short pigtail
wire and connector on each door latch connects the
door ajar switch to the vehicle electrical system
through its respective door wire harness. The door
ajar switches cannot be adjusted or repaired and, if
faulty or damaged, the door latch unit must be
replaced. (Refer to 23 - BODY/DOOR - FRONT/
LATCH - REMOVAL) or (Refer to 23 - BODY/DOOR -
REAR/LATCH - REMOVAL).
OPERATION
The door ajar switches are actuated by the door
latch mechanisms. When a door is closed and prop-
erly latched, its door ajar switch is an open circuit.
When a door is open or only partially latched, the
door ajar switch is a closed circuit. The door ajar
switches are hard wired between a body ground and
the Body Control Module (BCM). The driver side
front door ajar switch is connected to the BCM
through a driver door ajar switch sense circuit, while
the remaining three door ajar switches are connected
to the BCM through a passenger door ajar switch
sense circuit in a parallel-series arrangement. The
BCM reads the door ajar switch status through an
internal pull-up, then uses these inputs to control
many electronic functions and features of the vehicle.
The door ajar switches can be diagnosed using con-
ventional diagnostic tools and methods; however, for
proper diagnosis of the BCM, and both the hard
wired and electronic BCM outputs affected by the
door ajar switch inputs, a DRBIIItscan tool is
required. Refer to the appropriate diagnostic infor-
mation.
FLIP-UP GLASS AJAR SWITCH
DESCRIPTION
A flip-up glass ajar switch is standard equipment
in this vehicle. This switch is concealed within and
integral to the flip-up glass latch unit. The switch is
a momentary leaf contact-type unit that is actuated
by the flip-up glass latch mechanism. A dedicated
connector receptacle on the flip-up glass latch unit
connects the flip-up glass ajar switch to the vehicle
electrical system through the tailgate wire harness.
The flip-up glass ajar switch cannot be adjusted or
repaired and, if faulty or damaged, the flip-up glass
latch unit must be replaced. (Refer to 23 - BODY/
SWING GATE/FLIP-UP GLASS LATCH - REMOV-
AL).
OPERATION
The flip-up glass ajar switch is actuated by the
flip-up glass latch mechanism. When the flip-up glass
is closed and properly latched, the flip-up glass ajar
switch is an open circuit. When the flip-up glass is
open or only partially latched, the flip-up glass ajar
switch is a closed circuit. The flip-up glass ajar
switch is hard wired between a body ground, the
Body Control Module (BCM), and the rear wiper
motor. The output of the switch is connected to the
BCM and rear wiper motor through a flip-up glass
ajar switch sense circuit. The BCM reads the flip-up
glass ajar switch status through an internal pull-up,
then uses this input to control many electronic func-
KJLAMPS/LIGHTING - INTERIOR 8L - 77
COURTESY LAMP UNIT (Continued)

TAILGATE AJAR SWITCH
DESCRIPTION
A tailgate ajar switch is standard equipment in
this vehicle. This switch is concealed within and inte-
gral to the tailgate latch unit. The switch is a
momentary leaf contact-type unit that is actuated by
the tailgate latch mechanism. A pigtail wire harness
and connector on the tailgate latch unit connects the
tailgate ajar switch to the vehicle electrical system
through the tailgate wire harness. The tailgate ajar
switch cannot be adjusted or repaired and, if faulty
or damaged, the tailgate latch unit must be replaced.
(Refer to 23 - BODY/SWING GATE/LATCH -
REMOVAL).
OPERATION
The tailgate switch is actuated by the tailgate
latch mechanism. When the tailgate is closed and
properly latched, the tailgate ajar switch is an open
circuit. When the tailgate is open or only partially
latched, the tailgate ajar switch is a closed circuit.
The tailgate ajar switch is hard wired between a
body ground and the Body Control Module (BCM).
The output of the switch is connected to the BCM
through a tailgate ajar switch sense circuit. The
BCM reads the tailgate ajar switch status through
an internal pull-up, then uses this input to control
many electronic functions and features of the vehicle.
The tailgate ajar switch can be diagnosed using con-
ventional diagnostic tools and methods; however, for
proper diagnosis of the BCM, and both the hard
wired and electronic BCM outputs affected by the
tailgate ajar switch input, a DRBIIItscan tool is
required. Refer to the appropriate diagnostic infor-
mation.
TRANSMISSION RANGE
INDICATOR ILLUMINATION
BULB
REMOVAL
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE SUPPLEMENTAL RESTRAINT
SYSTEM BEFORE ATTEMPTING ANY STEERING
WHEEL, STEERING COLUMN, DRIVER AIRBAG,
PASSENGER AIRBAG, SEAT BELT TENSIONER,
FRONT IMPACT SENSORS, SIDE CURTAIN AIRBAG,
OR INSTRUMENT PANEL COMPONENT DIAGNOSIS
OR SERVICE. DISCONNECT AND ISOLATE THE
BATTERY NEGATIVE (GROUND) CABLE, THEN
WAIT TWO MINUTES FOR THE SYSTEM CAPACI-
TOR TO DISCHARGE BEFORE PERFORMING FUR-
THER DIAGNOSIS OR SERVICE. THIS IS THE ONLY
SURE WAY TO DISABLE THE SUPPLEMENTAL
RESTRAINT SYSTEM. FAILURE TO TAKE THE
PROPER PRECAUTIONS COULD RESULT IN ACCI-
DENTAL AIRBAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the center console from the floor panel
transmission tunnel. (Refer to 23 - BODY/INTERI-
OR/FLOOR CONSOLE - REMOVAL).
(3) From the left side of the vehicle, reach between
transmission range indicator and the floor panel
transmission tunnel to grasp the illumination lamp
socket (Fig. 15).
Fig. 15 Transmission Range Indicator Illumination
Bulb Remove/Install
1 - AUTOMATIC TRANSMISSION SHIFT MECHANISM
2 - ILLUMINATION LAMP SOCKET
8L - 82 LAMPS/LIGHTING - INTERIORKJ

The tailgate will lock and can not be unlocked if
the rear wiper switch is activated. The tailgate will
also lock if battery power is lost and then restored.
The tailgate/flip-up glass will not function with the
battery discharged or disconnected.
COMBINATION FLASHER
This flasher can be energized by the BCM to flash
all of the park/turn signal lamps as a optical alert for
the RKE panic function and, if the Flash Lights with
Lock programmable feature is enabled, as an optical
verification for the RKE lock event.
HORN RELAY
This relay can be energized by the BCM to sound
the horns as an audible alert for the RKE panic func-
tion and, if the Sound Horn on Lock programmable
feature is enabled, as an audible verification for the
RKE lock event.
LOW BEAM HEADLAMP RELAY
This relay can be energized by the BCM to flash
the headlamp low beams as an optical alert for the
RKE panic function.
OPERATION
POWER LOCKS
The Body Control Module (BCM) locks or unlocks
the doors when an actuation input signal from a door
lock switch or Remote Keyless Entry Module (RKE)
is received. The BCM turns on the output drivers
and provides a voltage level to the door lock motor
for a specified time. All passenger doors can be
locked or unlocked using a mechanical button
mounted on the door trim panel. The front passenger
doors and tailgate can be locked or unlocked by using
the key cylinder (tailgate cylinder does not lock/un-
lock vehicle. It only unlocks the tailgate). The tail-
gate will lock and can not be unlocked if the rear
wiper switch is activated (this prevents the wiper
from operating when the tailgate is ajar). The tail-
gate will also lock if battery power is lost and then
restored.
AUTOMATIC DOOR LOCKS
When the automatic door locks are ENABLED the
door locks will lock when the vehicle is moving at
about 25.7 Km/h (15 mph), all doors are closed and
the accelerator pedal is depressed. This feature can
be switched ON or OFF as desired. When the system
is DISABLED the door locks will operate normally,
but will not lock automatically when the vehicle is
rolling. Once the automatic door locks have been
actuated, they will not try to lock the doors again
until a door is opened.
DOOR LOCK INHIBIT
If the key is in the ignition, in any position, and
either front door is ajar, the doors can not be locked,
but the unlock function still operates. Pressing the
RKE lock/unlock button under these conditions will
result in a normal lock/unlock activation.
After the key is removed from the Ignition Switch,
or the doors are closed, the power door locks will
operate normally.
DOOR LOCK CIRCUIT PROTECTION
The BCM controls the door lock relays. If the door
lock switch is actuated continuously for more than
five seconds the BCM will turn the output driver
OFF (the BCM would consider the switch stuck).
Each lock motor is protected with a Positive Temper-
ature Coefficient device that prevents motor burn
out.
REMOTE KEYLESS ENTRY
²LOCK: Pressing the LOCK button locks all
doors, sounds horn (chirp) if enabled, and arms the
Vehicle Theft Security System, if enabled. The chirp
verifies that the RKE receiver has sent a message to
the BCM for door lock operation. If a door has not
been closed before pressing the LOCK button, the
vehicle may not be secured and the VTSS (if
equipped) will not arm until the door is closed.
²UNLOCK: Pressing the UNLOCK button once
will unlock the driver's door and activate the illumi-
nated entry system and disarm Vehicle Theft Secu-
rity System, if equipped. Pressing the UNLOCK
button twice within five seconds will unlock all doors.
²TAILGATE: Pressing the TAILGATE BUTTON
unlocks the tailgate remotely and opens the flip-up
glass.
²PANIC: Pressing the PANIC button sounds the
horns at half second intervals, flashes the exterior
lamps, and turns ON the interior lamps. The panic
alarm will remain on for three minutes, or until the
PANIC button is actuated again or the ignition
switch is turned to the RUN position.
The Remote Keyless Entry Module is capable of
retaining the transmitter Vehicle Access Code(s) in
its memory even after vehicle power has been inter-
rupted.
DIAGNOSIS AND TESTING - POWER LOCKS
The Body Control Module (BCM) enters a
reduced power mode after the key is turned
OFF. All diagnosis and testing of the power lock
system must be done with the key in the ON
position unless otherwise stated.
The most reliable, efficient, and accurate
means to diagnose the power lock system
requires the use of a DRBIIItscan tool and the
KJPOWER LOCKS 8N - 3
POWER LOCKS (Continued)