Jeep Liberty KJ. Manual — part 129
CONDITION
POSSIBLE CAUSES
CORRECTION
ALL LAMPS IN THE
COURTESY LAMP CIRCUIT
DO NOT ILLUMINATE
1. Ineffective or missing fuse.
1. Test and replace the fuse as required.
2. Ineffective ground circuit.
2. Test and repair the open ground circuit
as required.
3. Ineffective feed circuit.
3. Test and repair the open feed circuit as
required.
4. Ineffective cargo lamp
(courtesy defeat switch).
4. Test and replace the cargo lamp as
required.
5. Ineffective rear courtesy lamp
control circuit.
5. Test and repair the shorted courtesy lamp
control circuit as required.
6. Ineffective multi-function
switch.
6. Test and replace the multi-function switch
as required.
7. Ineffective Body Control
Module (BCM), BCM input, or
BCM output.
7. Use a diagnostic scan 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 EXTINGUISH
1. Ineffective lamp switch.
1. Test and replace a map/reading lamp
switch, cargo lamp switch, or sunvisor
(vanity lamp, switch and wiring) as required.
2. Ineffective ground circuit.
2. Test and repair the shorted courtesy lamp
driver (ground) circuit as required.
ALL LAMPS IN THE
COURTESY LAMP CIRCUIT
DO NOT EXTINGUISH
1. Ineffective ajar switch.
1. Test and replace a door, tailgate, or
liftglass ajar switch as required.
2. Ineffective ajar switch sense
circuit.
2. Test and repair the shorted ajar switch
sense circuit as required.
3. Ineffective ground circuit.
3. Test and repair the shorted courtesy lamp
driver (ground) circuit as required.
4. Ineffective Body Control
Module (BCM), BCM input, or
BCM output.
4. Use a diagnostic scan tool to test the
BCM, its inputs, and its outputs. Refer to
the appropriate diagnostic information.
PANEL LAMPS DIMMER CIRCUIT
CONDITION
POSSIBLE CAUSES
CORRECTION
A SINGLE LAMP DOES NOT
ILLUMINATE
1. Ineffective or missing bulb.
1. Test and replace lamp bulb as required.
2. Ineffective ground circuit.
2. Test and repair lamp ground circuit as
required.
3. Ineffective supply circuit.
3. Test and repair open fused panel lamps
dimmer switch signal circuit as required.
A SINGLE LAMP DOES NOT
EXTINGUISH
1. Ineffective supply circuit.
1. Test and repair shorted fused panel
lamps dimmer switch signal circuit as
required.
8L - 174
LAMPS/LIGHTING - INTERIOR
KJ
CONDITION
POSSIBLE CAUSES
CORRECTION
ALL LAMPS DO NOT
ILLUMINATE
1. Ineffective fused park lamp
relay output circuit.
1. Test and repair open fused park lamp
relay output circuit as required.
2. Ineffective or missing park
lamp relay.
2. Test and replace park lamp relay as
required.
3. Ineffective fused panel lamps
dimmer switch signal circuit.
3. Test and repair open fused panel lamps
dimmer switch signal circuit as required.
4. Ineffective Body Control
Module (BCM), BCM input, or
BCM output.
4. Use a diagnostic scan tool to test the
BCM, its inputs, and its outputs. Refer to
the appropriate diagnostic information.
5. Ineffective ElectroMechanical
Instrument Cluster (EMIC),
EMIC input, or EMIC output.
5. Use a diagnostic scan tool to test the
EMIC, its inputs, and its outputs. Refer to
the appropriate diagnostic information.
6. Ineffective multi-function
switch.
6. Test and replace the multi-function switch
as required.
ALL LAMPS EXCEPT
CLUSTER ILLUMINATION DO
NOT EXTINGUISH
1. Ineffective supply circuit.
1. Test and repair shorted fused panel
lamps dimmer switch signal circuit as
required.
SPECIFICATIONS
LAMPS/LIGHTING - INTERIOR
COURTESY LAMPS
BULB APPLICATION TABLE
LAMP
BULB
Cargo
578
Courtesy
906
Front Map/Reading
578
Rear Dome
578
Vanity Mirror
MOPAR 6501966
TORQUE SPECIFICATIONS
DESCRIPTION
N·m
Ft. Lbs.
In. Lbs.
Under Instrument Panel
Courtesy Lamp Mounting
Screw
2
-
17
PANEL LAMPS
BULB APPLICATION TABLE
KJ
LAMPS/LIGHTING - INTERIOR
8L - 175
LAMP
BULB
Ash Receiver
161
Cluster Illumination
103
Compass Mini-Trip Illumination
MOPAR 4437661
Heater-A/C Control Illumination
74
Transmission Range Indicator Illumination
S14V
8L - 176
LAMPS/LIGHTING - INTERIOR
KJ
AJAR SWITCH
DESCRIPTION
DOOR
This vehicle has four door ajar switches, one for each door. Each switch is concealed within and integral to its
respective door latch unit. The switches are momentary leaf contact-type units that are actuated by the mechanisms
internal to the door latch. 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 ineffective 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).
FLIP-UP GLASS
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. The switch is a momentary leaf contact-type unit that is actuated by the flip-up glass latch mech-
anism. An integral dedicated connector receptacle on the flip-up glass latch 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 ineffective or damaged, the latch unit must be replaced. (Refer to 23 - BODY/SWING GATE/
FLIP-UP GLASS LATCH - REMOVAL).
TAILGATE
A tailgate ajar switch is standard equipment in this vehicle. This switch is concealed within and integral to the tail-
gate latch unit. The switch is a momentary leaf contact-type unit that is actuated by the mechanism internal to the
tailgate latch. A pigtail wire harness and connector on the tailgate latch 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 ineffective or damaged, the latch unit must be replaced. (Refer to 23 - BODY/SWING GATE/LATCH -
REMOVAL).
OPERATION
DOOR
The door ajar switches are actuated by the mechanisms internal to the door latch. When a door is closed and
properly 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 front door
ajar switches are connected to the BCM through a driver or passenger door ajar switch sense circuit, while the rear
door ajar switches are connected to the BCM through a left or right rear door ajar switch sense circuit. The BCM
reads the door ajar switch status through an internal pull-up, then sends electronic door ajar switch status messages
to the ElectroMechanical Instrument Cluster (EMIC) over the Programmable Communications Interface (PCI) data
bus and uses these inputs to control many electronic functions and features of the vehicle.
The door ajar switches can be diagnosed and tested using conventional diagnostic tools and procedures. Refer to
the appropriate wiring information. However, conventional diagnostic methods may not prove conclusive in the diag-
nosis of the BCM, the EMIC, the PCI data bus, or the electronic messaging used to convey door ajar switch status
to other modules in the vehicle. The most reliable, efficient, and accurate means to diagnose the BCM, the EMIC,
the PCI data bus, and both the hard wired and electronic message inputs and outputs affected by the door ajar
switch inputs requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.
FLIP-UP GLASS
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 and both 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 sends electronic flip-up
KJ
LAMPS/LIGHTING - INTERIOR
8L - 177
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