Page 1
Factory Workshop Manual
Jeep
Liberty 2wd
V6-3.7L VIN K (2003)
Anonymous
1st January 2018
Make
Model
Engine and year
This manual was submitted by
Date
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm
Module, (Vehicle Antitheft) > Component Information > Locations
Page 3
Alarm Module: Locations
The SKIM is located on the right side of the steering column, below the ignition lock cylinder
housing and is concealed beneath the steering column shrouds.
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm
Module, (Vehicle Antitheft) > Component Information > Locations > Page 7
Alarm Module: Diagrams
Intrusion Transceiver Module (Export)
Sentry Key Immobilizer Module (Except Base)
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm
Module, (Vehicle Antitheft) > Component Information > Locations > Page 8
Page 6
Alarm Module: Service Precautions
WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, 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 CAPACITOR TO DISCHARGE BEFORE
PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO
DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO TAKE THE PROPER
PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
Page 7
Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm
Module, (Vehicle Antitheft) > Component Information > Locations > Page 9
Alarm Module: Description and Operation
Fig.10 Sentry Key Immobilizer Module
SENTRY KEY IMMOBILIZER MODULE
The Sentry Key Immobilizer Module (SKIM) is the primary component of the Sentry Key
Immobilizer System (SKIS). The SKIM is located on the right side of the steering column, below the
ignition lock cylinder housing and is concealed beneath the steering column shrouds. The molded
black plastic housing for the SKIM has an integral molded plastic halo-like antenna ring that
extends from one end. When the SKIM is properly installed on the steering column, the antenna
ring is oriented around the circumference of the ignition lock cylinder housing. A single integral
connector receptacle containing six terminal pins is located on the opposite end of the SKIM
housing from the antenna ring. A stamped metal mounting bracket secured to the SKIM housing
has a U-shaped clip formation that is used to secure the unit to the right lower flange of the steering
column jacket.
The SKIM cannot be adjusted or repaired. If faulty or damaged, the entire SKIM unit must be
replaced.
The Sentry Key Immobilizer Module (SKIM) contains a Radio Frequency (RF) transceiver and a
microprocessor. The SKIM transmits RF signals to, and receives RF signals from the Sentry Key
transponder through a tuned antenna enclosed within the molded plastic antenna ring integral to
the SKIM housing. If this antenna ring is not mounted properly around the ignition lock cylinder
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housing, communication problems between the SKIM and the transponder may arise. These
communication problems will result in Sentry Key transponder-related faults. The SKIM also
communicates over the Programmable Communications Interface (PCI) data bus with the
Powertrain Control Module (PCM), the ElectroMechanical Instrument Cluster (EMIC) and/or the
DRBIII scan tool.
The SKIM retains in memory the ID numbers of any Sentry Key transponder that is programmed
into it. A maximum of eight Sentry Key transponders can be programmed into the SKIM. For added
system security each SKIM is programmed with a unique Secret Key code. This code is stored in
memory, sent over the PCI data bus to the PCM, and is encoded to the transponder of every
Sentry Key that is programmed into the SKIM. Therefore, the Secret Key code is a common
element that is found in every component of the Sentry Key Immobilizer System (SKIS). Another
security code, called a PIN, is used to gain access to the SKIM Secured Access Mode. The
Secured Access Mode is required during service to perform the SKIS initialization and Sentry Key
transponder programming procedures. The SKIM also stores the Vehicle Identification Number
(VIN) in its memory, which it learns through a PCI data bus message from the PCM during SKIS
initialization.
In the event that a SKIM replacement is required, the Secret Key code can be transferred to the
new SKIM from the PCM using the DRBIII scan tool and the SKIS initialization procedure. Proper
completion of the SKIS initialization will allow the existing Sentry Keys to be programmed into the
new SKIM so that new keys will not be required. In the event that the original Secret Key code
cannot be recovered, SKIM replacement will also require new Sentry Keys. The DRBIII scan tool
will alert the technician during the SKIS initialization procedure if new Sentry Keys are required.
When the ignition switch is turned to the ON position, the SKIM transmits an RF signal to the
transponder in the ignition key. The SKIM then waits for an RF signal response from the
transponder. If the response received identifies the key as valid, the SKIM sends a valid key
message to the PCM over the PCI data bus. If the response received identifies the key as invalid,
or if no response is received from the key transponder, the SKIM sends an invalid key message to
the PCM. The PCM will enable or disable engine operation based upon the status of the SKIM
messages. It is important to note that the default condition in the PCM is an invalid key; therefore, if
no message is received from the SKIM by the PCM, the engine will be disabled and the vehicle
immobilized after two seconds of running.
The SKIM also sends SKIS indicator status messages to the EMIC over the PCI data bus to tell the
EMIC how to operate the SKIS indicator. This
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm
Module, (Vehicle Antitheft) > Component Information > Locations > Page 10
Page 10
indicator status message tells the EMIC to turn the indicator ON for about three seconds each time
the ignition switch is turned to the ON position as a bulb test. After completion of the bulb test, the
SKIM sends indicator status messages to the EMIC to turn the indicator OFF, turn the indicator
ON, or to flash the indicator ON and OFF. If the SKIS indicator flashes upon ignition ON or stays on
solid after the bulb test, it signifies a SKIS fault. If the SKIM detects a system malfunction and/or
the SKIS has become inoperative, the SKIS indicator will stay ON solid. If the SKIM detects an
invalid key or if a key transponder- related fault exists, the SKIS indicator will flash. If the vehicle is
equipped with the Customer Learn transponder programming feature, the SKIM will also send
messages to the EMIC to flash the SKIS indicator and to generate a single audible chime tone
whenever the Customer Learn programming mode is being utilized. (Refer to VEHICLE THEFT
SECURITY - STANDARD PROCEDURE - SENTRY KEY TRANSPONDER PROGRAMMING).
The SKIS performs a self-test each time the ignition switch is turned to the ON position, and will
store fault information in the form of Diagnostic Trouble Codes (DTC's) in SKIM memory if a system
malfunction is detected. The SKIM can be diagnosed, and any stored DTC's can be retrieved using
a DRBIII scan tool. Refer to the appropriate diagnostic information.
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm
Module, (Vehicle Antitheft) > Component Information > Locations > Page 11
Page 12
Alarm Module: Service and Repair
Programming the Sentry Key Immobilizer Module
NOTE: If the PCM and the SKIM are replaced at the same time, program the VIN into the PCM
first. All vehicle keys will then need to be replaced and programmed to the new SKIM.
1. Turn the ignition on (transmission in park/ neutral). 2. Use the DRBIII and select "THEFT
ALARM", "SKIM", then MISCELLANEOUS. 3. Select "SKIM MODULE REPLACEMENT
(GASOLINE)". 4. Program the vehicle four-digit PIN into the SKIM. 5. Select "COUNTRY CODE"
and enter the correct country.
NOTE: Be sure to enter the correct country code. If the incorrect country code is programmed into
SKIM, the SKIM must be replaced.
6. Select "UPDATE VIN" (the SKIM will learn the VIN from the PCM). 7. Press "ENTER" to transfer
the VIN (the PCM will send the VIN to the SKIM). 8. The DRBIII will ask if you want to transfer the
secret key from the PCM. This will ensure the current vehicle ignition keys will still operate the
SKIS system.
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Antenna
Control Module > Component Information > Locations
Page 14
Antenna Control Module: Locations
Fig. 44 Right Rear Body
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Antenna
Control Module > Component Information > Locations > Page 15
Page 16
Fig. 45 Rear Body
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Antenna
Control Module > Component Information > Locations > Page 16
Antenna Control Module: Diagrams
Antenna Module C1 (Export)
Antenna Module C2 (Export)
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Audio
Control Relay > Component Information > Description and Operation
Page 19
Audio Control Relay: Description and Operation
AMPLIFIER CHOKE AND RELAY
Models equipped with the premium speaker package have a amplifier choke and relay. The
amplifier choke and relay is mounted to the lower instrument panel above the pedals and towards
the instrument panel center stack.
The amplifier choke and relay should be checked if there is no sound output from the speakers.
The amplifier choke and relay can not be repaired or adjusted and, if faulty or damaged, the unit
must be replaced.
The amplifier choke and relay is used to control the supply of fused battery current to the front door
speaker-mounted dual amplifiers. The speaker relay is energized by a fused 12 volt output from the
radio receiver whenever the radio is turned on. For complete circuit diagrams, refer to the
appropriate wiring information. The wiring information includes wiring diagrams, proper wire and
connector repair procedures, details of wire harness routing and retention, connector pin-out
information and location views for the various wire harness connectors, splices and grounds.
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Audio
Control Relay > Component Information > Description and Operation > Page 20
Page 21
Audio Control Relay: Testing and Inspection
AMPLIFIER CHOKE AND RELAY
Any diagnosis of the Audio system should begin with the use of the DRB III diagnostic tool.
The amplifier choke and relay is used to switch power to the individual speaker amplifiers used with
the premium speaker package. The amplifier choke and relay is serviced only as a unit. If all of the
speakers are inoperative the amplifier choke and relay should be inspected. Before replacement,
make the following inspections of the amplifier choke and relay circuits. For complete circuit
diagrams, refer to the appropriate wiring information. The wiring information includes wiring
diagrams, proper wire and connector repair procedures, details of wire harness routing and
retention, connector pin-out information and location views for the various wire harness connectors,
splices and grounds.
1. Check the fused B(+) fuse in the junction block. If OK, go to Step 2. If not OK, replace the faulty
fuse. 2. Check for battery voltage at the fused B(+) fuse in the junction block. If OK, go to Step 3. If
not OK, repair the open fused B(+) circuit to the
battery as required.
3. Disconnect the instrument panel wire harness connector from the amplifier choke and relay.
Check for battery voltage at the fused B(+) circuit
cavity of the instrument panel wire harness connector for the amplifier choke and relay. If OK, go to
Step 4. If not OK, repair the open fused B(+) circuit to the junction block fuse as required.
4. Probe the ground circuit cavity of the instrument panel wire harness connector for the amplifier
choke and relay. Check for continuity to a good
ground. There should be continuity. If OK, go to Step 5. If not OK, repair the open ground circuit to
ground as required.
5. Turn the ignition switch to the RUN position and turn the radio ON. Check for battery voltage at
the radio 12 volt output circuit cavity of the
instrument panel wire harness connector for the amplifier choke and relay. If OK, go to Step 6. If
not OK, repair the open radio 12 volt output circuit to the radio as required.
6. Turn the radio and ignition switches to the OFF position. Reconnect the instrument panel wire
harness connector to the amplifier choke and relay.
Check for battery voltage at the amplified speaker (+) circuit cavity of the instrument panel wire
harness connector for the amplifier choke and relay. There should be zero volts. Turn the ignition
and radio switches to the ON position. There should now be battery voltage. If OK, repair the open
amplified speaker (+) circuits to the speaker-mounted amplifiers as required. If not OK, replace the
faulty amplifier choke and relay.
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Audio
Control Relay > Component Information > Description and Operation > Page 21
Audio Control Relay: Service and Repair
REMOVAL
1. Disconnect and isolate the battery negative cable. 2. Remove knee blocker cover and knee
blocker.
Fig.1 Radio Choke
3. Disconnect the electrical harness connector from the amplifier choke and relay.
INSTALLATION
1. Install the amplifier choke and relay. 2. Install the mounting screws. 3. Connect the electrical
harness connector. 4. Install knee blocker cover and knee blocker. 5. Connect the battery negative
cable.
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless
Entry Module > Component Information > Locations
Page 24
Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless
Entry Module > Component Information > Locations > Page 25
Remote Keyless Entry Module (Except Base)
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless
Entry Module > Component Information > Locations > Page 26
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Keyless Entry Module: Description and Operation
REMOTE KEYLESS ENTRY MODULE
When an RKE lock message is sent to the Body Control Module (BCM), the BCM actuates the
doors and the tailgate lock, the interior lighting is turned OFF , the horn chirps (if this feature is
enabled), the exterior lamps flash (if this feature is enabled) and, if the vehicle is so equipped, the
Vehicle Theft Security System (VTSS) is armed. When an RKE unlock message is sent to the
BCM, the BCM actuates the driver side front door (or all doors and the tailgate if this feature is
enabled) unlock, the interior lighting is turned on and, if the vehicle is so equipped, the VTSS is
disarmed.
When an RKE panic message is sent to the BCM, the BCM actuates the driver side front door (or
all doors and the tailgate if this feature is enabled) unlock, the interior lighting is turned ON and, if
the vehicle is so equipped, the VTSS is disarmed. The panic message will also cause the exterior
lamps (including the headlights) to flash, and the horn to pulse for about three minutes, or until a
second panic message is sent to the BCM. A vehicle speed of about 25.7 kilometers-per-hour (15
miles-per-hour) will also cancel the panic event.
Refer to the owner's manual for more information on the features, use and operation of the RKE
system.
Whenever the vehicle battery power is interrupted, the Remote Keyless Module (RKE) Module will
retain all vehicle access codes in its memory When replacing or adding a key fob transmitter
(maximum of 4) a DRB III scan tool is required to program the RKE Module to accept the new
Vehicle Access Code if a customer owned transmitter is not available.
If a functioning transmitter is available, (Refer to POWER LOCKS/KEYLESS ENTRY
TRANSMITTER - STANDARD PROCEDURE).
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless
Entry Module > Component Information > Locations > Page 27
Page 28
Keyless Entry Module: Testing and Inspection
Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper
wire and connector repair procedures, further details on wire harness routing and retention, as well
as pin-out and location views for the various wire harness connectors, splices and grounds. Refer
to the proper Body Diagnostic Procedures Manual for testing the Remote Keyless Entry system
using a DRB III scan tool.
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless
Entry Module > Component Information > Locations > Page 28
Keyless Entry Module: Service and Repair
REMOVAL
1. Disconnect and isolate the battery negative cable. 2. Remove the Junction Block (JB) (Refer to
POWER DISTRIBUTION/JUNCTION BLOCK - REMOVAL).
Fig.5 RKE Module Remove/Install
3. Remove Remote Keyless Entry module from Body Control Module.
INSTALLATION
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1. Install Remote Keyless Entry module to Body Control Module. 2. Install Junction Block (JB)
(Refer to POWER DISTRIBUTION/JUNCTION BLOCK - INSTALLATION). 3. Connect the battery
negative cable.
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Body and Frame > Door Lock Relay > Component
Information > Locations
Door Lock Relay: Locations
Junction Block Inboard
Driver Door Unlock, Passenger Door Unlock, and Door Lock Relays are located in the junction box.
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Body and Frame > Door Lock Relay > Component
Information > Locations > Page 33
Door Lock Relay: Diagrams
Driver Door Unlock Relay
Passenger Door Unlock Relay
Door Lock Relay
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module >
Component Information > Locations
Page 34
Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module >
Component Information > Locations > Page 37
Remote Keyless Entry Module (Except Base)
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module >
Component Information > Locations > Page 38
Page 36
Keyless Entry Module: Description and Operation
REMOTE KEYLESS ENTRY MODULE
When an RKE lock message is sent to the Body Control Module (BCM), the BCM actuates the
doors and the tailgate lock, the interior lighting is turned OFF , the horn chirps (if this feature is
enabled), the exterior lamps flash (if this feature is enabled) and, if the vehicle is so equipped, the
Vehicle Theft Security System (VTSS) is armed. When an RKE unlock message is sent to the
BCM, the BCM actuates the driver side front door (or all doors and the tailgate if this feature is
enabled) unlock, the interior lighting is turned on and, if the vehicle is so equipped, the VTSS is
disarmed.
When an RKE panic message is sent to the BCM, the BCM actuates the driver side front door (or
all doors and the tailgate if this feature is enabled) unlock, the interior lighting is turned ON and, if
the vehicle is so equipped, the VTSS is disarmed. The panic message will also cause the exterior
lamps (including the headlights) to flash, and the horn to pulse for about three minutes, or until a
second panic message is sent to the BCM. A vehicle speed of about 25.7 kilometers-per-hour (15
miles-per-hour) will also cancel the panic event.
Refer to the owner's manual for more information on the features, use and operation of the RKE
system.
Whenever the vehicle battery power is interrupted, the Remote Keyless Module (RKE) Module will
retain all vehicle access codes in its memory When replacing or adding a key fob transmitter
(maximum of 4) a DRB III scan tool is required to program the RKE Module to accept the new
Vehicle Access Code if a customer owned transmitter is not available.
If a functioning transmitter is available, (Refer to POWER LOCKS/KEYLESS ENTRY
TRANSMITTER - STANDARD PROCEDURE).
Page 37
Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module >
Component Information > Locations > Page 39
Page 38
Keyless Entry Module: Testing and Inspection
Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper
wire and connector repair procedures, further details on wire harness routing and retention, as well
as pin-out and location views for the various wire harness connectors, splices and grounds. Refer
to the proper Body Diagnostic Procedures Manual for testing the Remote Keyless Entry system
using a DRB III scan tool.
Page 39
Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module >
Component Information > Locations > Page 40
Keyless Entry Module: Service and Repair
REMOVAL
1. Disconnect and isolate the battery negative cable. 2. Remove the Junction Block (JB) (Refer to
POWER DISTRIBUTION/JUNCTION BLOCK - REMOVAL).
Fig.5 RKE Module Remove/Install
3. Remove Remote Keyless Entry module from Body Control Module.
INSTALLATION
Page 40
1. Install Remote Keyless Entry module to Body Control Module. 2. Install Junction Block (JB)
(Refer to POWER DISTRIBUTION/JUNCTION BLOCK - INSTALLATION). 3. Connect the battery
negative cable.
Page 41
Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Relay >
Component Information > Locations
Power Door Lock Relay: Locations
Junction Block Inboard
Driver Door Unlock, Passenger Door Unlock, and Door Lock Relays are located in the junction box.
Page 42
Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Relay >
Component Information > Locations > Page 44
Power Door Lock Relay: Diagrams
Driver Door Unlock Relay
Passenger Door Unlock Relay
Door Lock Relay
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Relay >
Component Information > Locations > Page 45
Page 44
Power Door Lock Relay: Service Precautions
WARNING: DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING
WHEEL,STEERING COLUMN, SEAT BELT TENSIONER, SIDE AIRBAG, OR INSTRUMENT
PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY
NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM
CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE.
THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE
PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIR-BAG DEPLOYMENT AND
POSSIBLE PERSONAL INJURY.
Page 45
Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Relay >
Component Information > Locations > Page 46
Page 46
Power Door Lock Relay: Description and Operation
The power door lock system uses the following relays for the front and rear passenger doors only:
- Driver door unlock relay
- Door lock relay
- Passenger Doors unlock relay
- The tailgate uses outputs from the Body Control Module (BCM).
The relays are electromechanical devices that switch battery current to the door lock circuit when
the Body Control Module (BCM) grounds the relay coil. These relays are located in the Junction
Block (JB). For complete circuit diagrams, refer to the appropriate wiring information. The wiring
information includes wiring diagrams, proper wire and connector repair procedures, details of wire
harness routing and retention, connector pin-out information and location views for the various wire
harness connectors, splices and grounds.
The relays are a International Standards Organization (ISO) micro-relay. Relays conforming to the
ISO specifications have common physical dimensions, current capacities, terminal patterns, and
terminal functions. The ISO micro-relay terminal functions are the same as a conventional ISO
relay. However, the ISO micro-relay terminal pattern (or footprint) is different, the current capacity
is lower, and the physical dimensions are smaller than those of the conventional ISO relay
The relay cannot be repaired or adjusted and, if faulty or damaged, it must be replaced.
The ISO relay consists of an electromagnetic coil, a resistor and three (two fixed and one movable)
electrical contacts. The movable (common feed) relay contact is held against one of the fixed
contacts (normally closed) by spring pressure. When the electromagnetic coil is energized, it draws
the movable contact away from the normally closed fixed contact, and holds it against the other
(normally open) fixed contact.
When the electromagnetic coil is de-energized, spring pressure returns the movable contact to the
normally closed position. The resistor is connected in parallel with the electromagnetic coil in the
relay and helps to dissipate voltage spikes that are produced when the coil is de-energized.
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Relay >
Component Information > Locations > Page 47
Power Door Lock Relay: Testing and Inspection
Fig.4 Power Lock Relay
The power lock relays are located in the Junction Block (JB) under the instrument panel. For
complete circuit diagrams, refer to the appropriate wiring information. The wiring information
includes wiring diagrams, proper wire and connector repair procedures, details of wire harness
routing and retention, connector pin-out information and location views for the various wire harness
connectors, splices and grounds.
WARNING: DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING
WHEEL,STEERING COLUMN, SEAT BELT TENSIONER, SIDE AIRBAG, OR INSTRUMENT
PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY
NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM
CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE.
THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE
PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIR-BAG DEPLOYMENT AND
POSSIBLE PERSONAL INJURY.
1. Remove suspected faulty relay from the (JB). 2. A relay in the de-energized position should have
continuity between terminals 87A and 30, and no continuity between terminals 87 and 30. If OK,
go to Step 3. If not OK, replace the faulty relay.
Page 48
3. Resistance between terminals 85 and 86 (electromagnet) should be 75 ± 8 ohms. If OK, go to
Step 4. If not OK, replace the faulty relay. 4. Connect a battery to terminals 85 and 86.There should
now be continuity between terminals 30 and 87, and no continuity between terminals 87A
and 30. If not OK, replace the faulty relay.
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Relay >
Component Information > Locations > Page 48
Page 50
Power Door Lock Relay: Service and Repair
REMOVAL
1. Disconnect and isolate the battery negative cable. 2. Reach up under instrument panel and
remove the relay from Junction Block (JB).
INSTALLATION
1. Position the horn relay in the proper receptacle in the Junction Block (JB). 2. Push down firmly
on the relay until the terminals are fully seated. 3. Connect the battery negative cable.
Page 51
Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Body and Frame > Seat Heater Control Module >
Component Information > Locations
Seat Heater Control Module: Locations
Fig.16 Heated Seat Module Location
The heated seat module is located under the left front seat cushion, where it is secured to a
mounting bracket via two push-pin retainers.
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Component Information > Locations > Page 52
Heated Seat Module (Highline)
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Component Information > Locations > Page 53
Seat Heater Control Module: Description and Operation
Fig.14 Heated Seat Module
HEATED SEAT MODULE
The heated seat module is also known as the Seat Heat Interface Module. The heated seat module
is located under the left front seat cushion, where it is secured to a mounting bracket via two
push-pin retainers. The heated seat module has a single connector receptacle that allows the
module to be connected to all of the required inputs and outputs through the seat wire harness.
The heated seat module is an electronic microprocessor controlled device designed and
programmed to use inputs from the heated seat relay the two heated seat switches and the two
heated seat sensors to operate and control the heated seat elements in both front seats and the
two heated seat indicator lamp Light-Emitting Diodes (LEDs) in each heated seat switch. The
heated seat module is also programmed to perform self-diagnosis of certain heated seat system
functions and provide feedback of that diagnosis through the heated seat switch indicator lamps.
The heated seat module cannot be repaired. If the heated seat module is damaged or faulty, the
entire module must be replaced.
The heated seat module operates on fused battery current received from a fuse in the junction
block. The module is grounded at all times. Inputs to the module include a resistor multiplexed
heated seat switch request circuit for each of the two heated seat switches and the heated seat
sensor inputs from the seat cushions of each front seat. In response to those inputs, the heated
seat module controls battery current to the heated seat elements and sensors, and controls the
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ground for the heated seat switch indicator lamps (LED's).
When a heated seat switch (Driver or Passenger) is depressed a signal is received by the heated
seat module, the module energizes the proper indicator LED (Low or High) in the switch by
grounding the indicator lamp circuit to indicate that the heated seat system is operating. At the
same time, the heated seat module energizes the selected heated seat sensor circuit and the
sensor provides the module with an input indicating the surface temperature of the selected seat
cushion.
The Low heat set point is about 36 °C (96.8 °F), and the High heat set point is about 42 °C (107.6
°F). If the seat cushion surface temperature input is below the temperature set point for the
selected temperature setting, the heated seat module energizes an N-channel Field Effect
Transistor (N-FET) within the module which energizes the heated seat elements in the selected
seat cushion and back. When the sensor input to the module indicates the correct temperature set
point has been achieved, the module de-energizes the N-FET which de-energizes the heated seat
elements. The heated seat module will continue to cycle the N-FET as needed to maintain the
selected temperature set point.
If the heated seat module detects a heated seat sensor value input that is out of range or a shorted
or open heated seat element circuit, it will notify the vehicle operator or the repair technician of this
condition by flashing the High and/or Low indicator lamps in the affected heated seat switch. Refer
to Diagnosis and Testing Heated Seat System in Heated Systems for flashing LED diagnosis and
testing procedures. Refer to Diagnosis and Testing Heated Seat Module in this section for heated
seat module diagnosis and testing procedures. Also refer to the Body Diagnostic Manual for
additional diagnosis and testing procedures.
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Component Information > Locations > Page 54
Seat Heater Control Module: Testing and Inspection
If a heated seat fails to heat and one or both of the indicator lamps on a heated seat switch flash,
refer to Heated Seat System Diagnosis and Testing in Heated Systems for flashing LED failure
identification. Refer to Wiring Diagrams in for complete heated seat system wiring diagrams.
1. Remove the heated seat module from its mounting location (Refer to ELECTRONIC CONTROL
MODULES/MEMORY HEATED
SEAT/MIRROR MODULE - REMOVAL).
NOTE: ANY RESISTANCE VALUES (OHMS ) GIVEN IN THE FOLLOWING TEXT ARE
SUPPLIED USING THE AUTOMATIC RANGE GENERATED BY A FLUKE AUTOMOTIVE
METER. IF ANOTHER TYPE OF MEASURING DEVICE IS USED THE VALUES GENERATED
MAY NOT BE THE SAME AS THE RESULTS SHOWN HERE, OR MAY HAVE TO BE
CONVERTED TO THE RANGE USED HERE.
Right Seat Heater Inoperative
1. If a heated seat heats but one or both indicator lamps (LED's) on the heated seat switch fail to
illuminate, check the driver circuit with the
inoperative LED for a short to ground. If OK, replace the heated seat switch. If NOT OK repair the
short to ground as required and than replace the heated seat switch.
NOTE: IF THE RIGHT SEAT CUSHION IS ALREADY WARM THE FOLLOWING STEP WILL NOT
PROVE CONCLUSIVE.
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Fig.7 Heated Seat Module Electical Connector
2. Back-probe the heated seat module wire harness connector do not disconnect. Check cavity #3
for battery voltage when the right heated seat
switch is turned "ON", voltage should be present, If OK go to Step 3 If NOT OK, test the right
heated seat switch (Refer to HEATED SEATS/PASSENGER HEATED SEAT SWITCH DIAGNOSIS AND TESTING). If the switch tests OK, check for continuity between the switch and
control module on the MUX circuit, If OK replace the heated seat control module. If NOT OK, repair
the open or shorted MUX circuit as required.
NOTE: BE CERTAIN THE BATTERY IS FULLY CHARGED BEFORE TESTING. FAILURE TO DO
SO CAN RESULT IN INCORRECT READINGS.
3. Back-probe the heated seat module wire harness connector, do not disconnect. Check cavity
#10 for battery voltage, while observing the voltmeter
depress the right heated seat switch low setting twice, voltage should toggle between approx. 12v
and 8v, If OK go to Step 4. If NOT OK check for continuity between the switch and control module
on the low heat driver circuit, If OK replace the heated seat control module.
4. Back-probe the heated seat module wire harness connector, do not disconnect. Check cavity
#11 for battery voltage, while observing the voltmeter
depress the right heated seat switch high setting twice, voltage should toggle between approx. 12v
and 8v, If OK go to Step 5. If NOT OK check for continuity between the switch and control module
on the high heat driver circuit, If OK replace the heated seat control module.
5. Back-probe the heated seat module wire harness connector, do not disconnect. Check cavity #2
for approx. 5v, voltage should be present, If OK go
to Step 6. If NOT OK replace the heated seat control module.
6. Back-probe the heated seat module wire harness connector, do not disconnect. Check cavity #7
for a range in voltage from 1.72v (warm seat) -
3.0v (cold seat). It should be within this range, If OK replace the heated seat module. If NOT OK
test the Heated Seat Sensor. If NOT OK, replace the right heated seat element and sensor
assembly. If the heated seat sensor tests OK, check for continuity between the right heated seat
cushion connector and control module connector on the 5v supply circuit, If NOT OK, repair the
open or shorted 5v supply circuit as required. If OK check for continuity between the right heated
seat cushion connector and control module connector on the temperature sensor input circuit. If
NOT OK, repair the open or shorted temperature sensor input circuit as required. If OK replace the
heated seat control module.
Left Seat Heater Inoperative
1. If a heated seat heats but one or both indicator lamps (LED's) on the heated seat switch fail to
illuminate, check the driver circuit with the
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inoperative LED for a short to ground. If OK, replace the heated seat switch. If NOT OK repair the
short to ground as required and than replace the heated seat switch.
NOTE: IF THE LEFT SEAT CUSHION IS ALREADY WARM THE FOLLOWING STEP WILL NOT
PROVE CONCLUSIVE.
2. Back-probe the heated seat module wire harness connector, do not disconnect. Check cavity #5
for battery voltage when the left heated seat switch
is turned "ON", voltage should be present, If OK go to Step 3 If NOT OK, test the left heated seat
switch (Refer to HEATED SEATS/ DRIVER HEATED SEAT SWITCH - DIAGNOSIS AND
TESTING). If the switch tests OK, check for continuity between the switch and control module on
the MUX circuit, If OK replace the heated seat control module. If NOT OK, repair the open or
shorted MUX circuit as required.
3. Back-probe the heated seat module wire harness connector, do not disconnect. Check cavity
#12 for battery voltage, while observing the voltmeter
depress the left heated seat switch low setting twice, voltage should toggle between approx. 12v
and 8v. If OK go to Step 4. If NOT OK check for continuity between the switch and control module
on the low heat driver circuit, If OK replace the heated seat control module.
4. Back-probe the heated seat module wire harness connector, do not disconnect. Check cavity
#14 for battery voltage, while observing the voltmeter
depress the left heated seat switch high setting twice, voltage should toggle between approx. 12v
and 8v. If OK go to Step 5. If NOT OK check for continuity between the switch and control module
on the high heat driver circuit, If OK replace the heated seat control module.
5. Back-probe the heated seat module wire harness connector, do not disconnect. Check cavity #2
for approx. 5v, 5 voltage should be present, If OK
go to Step 6. If NOT OK replace the heated seat control module.
6. Back-probe the heated seat module wire harness connector, do not disconnect. Check cavity #8
for a range in voltage from 1.72v (warm seat) -
3.0v (cold seat). It should be within this range, If OK replace the heated seat control module. If
NOT OK, test the Heated Seat Sensor. If NOT OK, replace the left heated seat element and sensor
assembly. If the heated seat sensor tests OK, check for continuity between the left heated seat
cushion connector and control module connector on the 5v supply circuit, If NOT OK, repair the
open or shorted 5v supply circuit as required. If OK check for continuity between the left heated
seat cushion connector and control module connector on the temperature sensor input circuit. If
NOT OK, repair the open or shorted temperature sensor input circuit as required. If OK replace the
heated seat control module.
Both Seats Inoperative
If both seats (driver and passenger) fail to heat and the indicator lamps on the heated seat
switches for both seats fail to operate, test the heated seat fuses in the junction block. If the heated
seat fuses check OK, go to Step 1. 1. Back-probe the heated seat module wire harness connector,
do not disconnect. Check for continuity between the ground circuit cavity #13 of the
heated seat module connector and a good ground. If OK go to Step 2. If NOT OK, repair the open
or shorted ground circuit as required.
2. Back-probe the heated seat module wire harness connector, do not disconnect. Check cavity #4
and #6 for battery voltage, voltage should be
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present, If OK go to Step 3. If NOT OK repair the open or shorted fused B(+) circuit as required.
3. Back-probe the heated seat module wire harness connector, do not disconnect. Check cavity #2
for approx. 5v, voltage should be present, replace
the heated seat control module with a known good module and verify system operation.
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Component Information > Locations > Page 56
Seat Heater Control Module: Service and Repair
Fig.16 Heated Seat Module Location
REMOVAL
1. Working under the front seat cushion, remove the heated seat module from its mounting bracket
by gently prying the module off of the two
mounting pushpins.
2. Disconnect the seat wire harness connector from the connector receptacle on the side of the
heated seat module. 3. Remove the heated seat module from the vehicle.
INSTALLATION
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1. Connect the seat wire harness connector to the connector receptacle on the side of the heated
seat module. 2. Install the heated seat module on its mounting bracket under the front seat. 3.
Verify heated seat system operation.
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Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake
Control Module > Component Information > Description and Operation
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Electronic Brake Control Module: Description and Operation
CONTROLLER ANTILOCK BRAKE (CAB)
The Antilock Brake Controller (CAB) is a microprocessor-based device that monitors wheel speeds
and controls the antilock functions.
The primary functions of the CAB are: monitor wheel speeds
- detect wheel locking tendencies
- control fluid pressure modulations to the brakes during antilock stop operation
- control the ABS warning indicator
- monitor the system for proper operation
- provide communication to the DRB III while in diagnostic mode
- store diagnostic information in non-volatile memory
The CAB continuously monitors the wheel speed sensors. When a wheel locking tendency is
detected, the CAB will command the appropriate HCU valve to modulate brake fluid pressure to
that wheel. Brake pedal position is maintained during an antilock stop by being a closed system
with the use of 3 accumulators. The CAB continues to control pressure in individual hydraulic
circuits until a wheel locking tendency is no longer present. The CAB turns on the pump/motor
during an antilock stop.
The antilock brake system is constantly monitored by the CAB for the proper operation. If the CAB
detects a system malfunction, it can disable the antilock system and activate the ABS warning
indicator. If the antilock function is disabled, the system will revert to standard base brake system
operation.
The CAB inputs include the following: three wheel speed sensors
- brake lamp switch
- ignition switch
- battery voltage
- diagnostic communication (PCI BUS)
- G-sensor (internal acceleration sensor)
The CAB outputs include the following: six valve/solenoid drivers
- pump/motor actuation
- ABS warning indicator actuation
- diagnostic communication (PCI BUS)
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Page 65
Electronic Brake Control Module: Service and Repair
REMOVAL
1. Install the prop rod on the brake pedal to keep pressure on the brake system. 2. Remove the
negative battery cable from the battery.
Fig.4 Cab Harness Connector Release
3. Pull up on the CAB harness connector release and remove connector. 4. Remove the pump
connector from the CAB.
Fig.5 HCU/CAB Mounting
5. Remove the CAB mounting bolts.
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Control Module > Component Information > Description and Operation > Page 62
Fig.6 Controller And HCU
6. Remove the CAB from the HCU.
INSTALLATION
1. Install CAB to the HCU. 2. Install mounting bolts. Tighten to 2 Nm (16 in. lbs.). 3. Install the
pump electrical connector to the CAB. 4. Install the wiring harness connector to the CAB and push
down on the release to secure the connector. 5. Install negative battery cable to the battery 6.
Remove the pushrod from the vehicle.
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Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor
Relay > Component Information > Locations
Fig. 29 Front Engine Compartment
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor
Relay > Component Information > Diagrams > Diagram Information and Instructions
Radiator Cooling Fan Motor Relay: Diagram Information and Instructions
How to Find Wiring Diagrams
Diagrams are presented in three main categories:
^ Power Distribution Diagrams
Circuits feeding/protecting the system diagrams
^ System Diagrams
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Component Circuits that work together as a system
^ Grounds Diagrams
Circuits grounding the system diagrams
Power Distribution Diagrams
The power distribution diagrams are located at Power and Ground Distribution.
These diagrams are especially useful for identifying potential suspects that could be causing any
"dead/unpowered" fuses and/or for identifying potential suspects that could be the causing any
"blown" fuses.
System Diagrams
These diagrams are useful for identifying a component's power source and its direct relationship to
the other components in the same system. These diagrams may also indicate a component's
indirect relationship with components in other systems.
Grounds Diagrams
The grounds diagrams are located at Power and Ground Distribution.
These diagrams are useful for determining the interconnections of the grounding circuits of different
systems.
PLEASE NOTE: When locating diagrams by their ID numbers, some diagram sheets may appear
to be missing because of gaps in the number sequences. These "gaps" are actually for diagrams
that do not apply to the vehicle model selected.
How to Navigate Between Wiring Diagrams
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Circuits that go from one diagram sheet to another will be marked with references indicating which
diagram sheet the circuit went to/came from, i.e. "8W-16-4".
Theses references will be in the form of unique diagram identification numbers (i.e. 8W-16-4,
8W-25-2, etc). All diagram sheets are identified with this unique ID number in their captions.
Diagrams sheets being referred to that may reside outside of the set of diagrams you are viewing
can be accessed by clicking on the hyperlink for "Diagrams By Number" which is provided with all
sets of diagrams.
PLEASE NOTE: When locating diagrams by their ID numbers, some diagrams may appear to be
missing because of gaps in the number sequences. These "gaps" are actually for diagrams that do
not apply to the vehicle model selected.
How to Use Wiring Diagrams
DIAGRAM LAYOUT
DaimlerChrysler Corporation wiring diagrams are designed to provide information regarding the
vehicles wiring content. In order to effectively use the wiring diagrams to diagnose and repair
DaimlerChrysler Corporation vehicles, it is important to understand all of their features and
characteristics.
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Relay > Component Information > Diagrams > Diagram Information and Instructions > Page 70
General Information (Part 1 of 2)
Page 73
Diagrams are arranged such that the power (B+) side of the circuit is placed near the top of the
page, and the ground (B-) side of the circuit is placed near the bottom of the page (Fig. 1).
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Relay > Component Information > Diagrams > Diagram Information and Instructions > Page 71
General Information (Part 2 of 2)
Page 75
All switches, components, and modules are shown in the at rest position with the doors closed and
the key removed from the ignition (Fig. 2).
Components are shown two ways. A solid line around a component indicates that the component is
complete. A dashed line around the component indicates that the component is being shown is not
complete. Incomplete components have a reference number to indicate the page where the
component is shown complete. To find any diagram sheets referred to by number only, go to
Vehicle/Diagrams/Electrical/Diagrams By Number.
It is important to realize that no attempt is made on the diagrams to represent components and
wiring as they appear on the vehicle. For example, a short piece of wire is treated the same as a
long one. In addition, switches and other components are shown as simply as possible, with regard
to
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Relay > Component Information > Diagrams > Diagram Information and Instructions > Page 72
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function only.
The wiring diagrams are grouped into individual sets at the applicable system level. If a component
is most likely found in a particular system, it will be shown complete (all wires, connectors, and
pins) within that system's diagrams. It can, however, be shown partially in another system's
diagrams if it contains some associated wiring.
Wiring Diagram Symbols
SYMBOLS
International symbols are used throughout the wiring diagrams. These symbols are consistent with
those being used around the world (Fig. 3).
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Circuit Identification Code Chart
CIRCUIT FUNCTIONS
All circuits in the diagrams use an alpha/numeric code to identify the wire and its function. To
identify which circuit code applies to a system, refer to the Circuit Identification Code Chart. This
chart shows the main circuits only and does not show the secondary codes that may apply to some
models.
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Relay > Component Information > Diagrams > Diagram Information and Instructions > Page 74
Wire Code Identification
Wire Color Code Chart
CIRCUIT INFORMATION
Each wire shown in the diagrams contains a code which identifies the main circuit, part of the main
circuit, gauge of wire, and color.
TERMINOLOGY
This is a list of terms and definitions used in the wiring diagrams.
LHD .....................................................................................................................................................
...................................... Left Hand Drive Vehicles RHD .....................................................................
.................................................................................................................... Right Hand Drive
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Vehicles ATX
.............................................................................................................................................................
Automatic Transmissions-Front Wheel Drive MTX ..............................................................................
................................................................................... Manual Transmissions-Front Wheel Drive AT .
..............................................................................................................................................................
.. Automatic Transmissions-Rear Wheel Drive MT ..............................................................................
...................................................................................... Manual Transmissions-Rear Wheel Drive
SOHC ..................................................................................................................................................
............................... Single Over Head Cam Engine DOHC ................................................................
............................................................................................................... Double Over Head Cam
Engine BUX .........................................................................................................................................
................................................................ Built-Up-Export Built-Up-Export
.............................................................................................................. Vehicles Built For Sale In
Markets Other Than North America Except Built-Up-Export
.................................................................................................................................... Vehicles Built
For Sale In North America
Circuit Functions
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Relay > Component Information > Diagrams > Diagram Information and Instructions > Page 75
Circuit Identification Code Chart
Page 83
All circuits in the diagrams use an alpha/numeric code to identify the wire and its function. To
identify which circuit code applies to a system, refer to the Circuit Identification Code Chart. This
chart shows the main circuits only and does not show the secondary codes that may apply to some
models.
Circuit Information
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Wire Code Identification
Wire Color Code Chart
Each wire shown in the diagrams contains a code which identifies the main circuit, part of the main
circuit, gauge of wire, and color.
Connector Views Information
Connector views show the connector and the circuits associated with that connector. The
connectors are identified using the name/number on the diagram sheets. A master list can be
found at Vehicle / Diagrams. See: Diagrams/Connector Views
Connector, Ground and Splice Identification and Location
CAUTION: Not all connectors are serviced. Some connectors are serviced only with a harness. A
typical example might be the Supplemental Restraint System connectors. Always check parts
availability before attempting a repair.
IDENTIFICATION
Connectors, grounds, and splices are identified as follows:
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- In-line connectors located in the engine compartment are C100 series numbers
- In-line connectors located in the Instrument Panel area are C200 series numbers.
- In-line connectors located in the body are C300 series numbers.
- Jumper harness connectors are C400 series numbers.
- Grounds and ground connectors are identified with a "G" and follow the same series numbering
as the in-line connectors.
- Splices are identified with an "S" and follow the same series numbering as the in-line connectors.
- Component connectors are identified by the component name instead of a number. Multiple
connectors on a component use a C1, C2, etc. identifier.
LOCATIONS
Vehicle/Locations contains the master connector/ground/splice location index charts with
hyperlinks to the applicable location illustrations. The illustrations contain the connector name (or
number)/ground number/splice number and component identification.
The abbreviation T/O is used in the location column to indicate a point in which the wiring harness
branches out to a component. The abbreviation N/S means Not Shown in the illustrations.
PLEASE NOTE: The master location index charts contain numerous items that may not be
applicable to all vehicle models. If a link on the master location index chart to a figure is not
functional, that means that the chart item and/or figure in question does NOT apply to the vehicle
model selected.
Electrostatic Discharge (ESD) Sensitive Devices
Electrostatic Discharge Symbol
All ESD sensitive components are solid state and a symbol is used to indicate this. When handling
any component with this symbol comply with the following procedures to reduce the possibility of
electrostatic charge build up on the body and inadvertent discharge into the component. If it is not
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known whether the part is ESD sensitive, assume that it is.
1. Always touch a known good ground before handling the part. This should be repeated while
handling the part and more frequently after sliding
across a seat, sitting down from a standing position, or walking a distance.
2. Avoid touching electrical terminals of the part, unless instructed to do so by a written procedure.
3. When using a voltmeter, be sure to connect the ground lead first. 4. Do not remove the part from
its protective packing until it is time to install the part. 5. Before removing the part from its package,
ground the package to a known good ground on the vehicle.
Notes, Cautions and Warnings
Additional important information is presented in three ways: Notes, Cautions, and Warnings.
NOTES are used to help describe how switches or components operate to complete a particular
circuit. They are also used to indicate different conditions that may appear on the vehicle. For
example, an up-to and after condition.
CAUTIONS are used to indicate information that could prevent making an error that may damage
the vehicle.
WARNINGS provide information to prevent personal injury and vehicle damage. Below is a list of
general warnings that should be followed any time a vehicle is being serviced.
WARNING:
- ALWAYS WEAR SAFETY GLASSES FOR EYE PROTECTION.
- USE SAFETY STANDS ANYTIME A PROCEDURE REQUIRES BEING UNDER A VEHICLE.
- BE SURE THAT THE IGNITION SWITCH ALWAYS IS IN THE OFF POSITION, UNLESS THE
PROCEDURE REQUIRES IT TO BE ON.
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- SET THE PARKING BRAKE WHEN WORKING ON ANY VEHICLE. AN AUTOMATIC
TRANSMISSION SHOULD BE IN PARK. A MANUAL TRANSMISSION SHOULD BE IN
NEUTRAL.
- OPERATE THE ENGINE ONLY IN A WELL-VENTILATED AREA.
- KEEP AWAY FROM MOVING PARTS WHEN THE ENGINE IS RUNNING, ESPECIALLY THE
FAN AND BELTS.
- TO PREVENT SERIOUS BURNS, AVOID CONTACT WITH HOT PARTS SUCH AS THE
RADIATOR, EXHAUST MANIFOLD(S), TAIL PIPE, CATALYTIC CONVERTER, AND MUFFLER.
- DO NOT ALLOW FLAME OR SPARKS NEAR THE BATTERY. GASES ARE ALWAYS
PRESENT IN AND AROUND THE BATTERY.
- ALWAYS REMOVE RINGS, WATCHES, LOOSE HANGING JEWELRY, AND LOOSE
CLOTHING.
Symbols
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Relay > Component Information > Diagrams > Diagram Information and Instructions > Page 79
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Wiring Diagram Symbols
International symbols are used throughout the wiring diagrams. These symbols are consistent with
those being used around the world (Fig. 3).
Take Outs
The abbreviation T/O is used in the component location section to indicate a point in which the
wiring harness branches out to a component.
Terminology
This is a list of terms and definitions used in the wiring diagrams.
LHD .....................................................................................................................................................
.......................................... Left Hand Drive Vehicles
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Relay > Component Information > Diagrams > Diagram Information and Instructions > Page 80
Page 93
RHD .....................................................................................................................................................
........................................ Right Hand Drive Vehicles ATX ..................................................................
............................................................................................... Automatic Transmissions-Front Wheel
Drive MTX ............................................................................................................................................
......................... Manual Transmissions-Front Wheel Drive AT ...........................................................
.......................................................................................................... Automatic Transmissions-Rear
Wheel Drive MT ...................................................................................................................................
..................................... Manual Transmissions-Rear Wheel Drive SOHC ..........................................
........................................................................................................................................... Single
Over Head Cam Engine DOHC ...........................................................................................................
........................................................................ Double Over Head Cam Engine BUX .........................
..............................................................................................................................................................
...................... Built-Up-Export Built-Up-Export
.................................................................................................................. Vehicles Built For Sale In
Markets Other Than North America Except Built-Up-Export
........................................................................................................................................ Vehicles
Built For Sale In North America
Section Identification and Information
Section Identification
The wiring diagrams are grouped into individual sections. If a component is most likely found in a
particular group, it will be shown complete (all wires, connectors, and pins) within that group. For
example, the Auto Shutdown Relay is most likely to be found in Group 30, so it is shown there
complete. It can, however, be shown partially in another group if it contains some associated
wiring.
Connector Replacement
REMOVAL
1. Disconnect battery
Fig. 10 Removal Of Dress Cover
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Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor
Relay > Component Information > Diagrams > Diagram Information and Instructions > Page 81
2. Release Connector Lock (Fig. 10). 3. Disconnect the connector being repaired from its mating
half/component. 4. Remove the dress cover (if applicable) (Fig. 10).
Fig. 11 Examples Of Connector Secondary Terminal Locks
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5. Release the Secondary Terminal Lock, if required (Fig. 11).
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor
Relay > Component Information > Diagrams > Diagram Information and Instructions > Page 82
Fig. 12 Terminal Removal
6. Position the connector locking finger away from the terminal using the proper special tool. Pull
on the wire to remove the terminal from the
Page 97
connector (Fig. 12).
INSTALLATION
1. Insert the removed terminal in the same cavity on the repair connector. 2. Repeat steps for each
terminal in the connector, being sure that all wires are inserted into the proper cavities. For
additional connector pin-out
identification, refer to the wiring diagrams.
3. When the connector is re-assembled, the secondary terminal lock must be placed in the locked
position to prevent terminal push out. 4. Replace dress cover (if applicable). 5. Connect connector
to its mating half/component. 6. Connect battery and test all affected systems.
Diode Replacement
REMOVAL
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Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor
Relay > Component Information > Diagrams > Diagram Information and Instructions > Page 83
1. Disconnect the battery. 2. Locate the diode in the harness, and remove the protective covering.
Diode Identification
3. Remove the diode from the harness, pay attention to the current flow direction.
INSTALLATION
1. Remove the insulation from the wires in the harness. Only remove enough insulation to solder in
the new diode. 2. Install the new diode in the harness, making sure current flow is correct. If
necessary, refer to the appropriate wiring diagram for current flow (Fig.
13).
3. Solder the connection together using rosin core type solder only Do not use acid core solder. 4.
Tape the diode to the harness using electrical tape. Make sure the diode is completely sealed from
the elements. 5. Re-connect the battery and test affected systems.
Terminal Replacement
REMOVAL
1. Follow steps for removing terminals described in Connector Replacement. 2. Cut the wire 6
inches from the back of the connector.
INSTALLATION
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1. Select a wire from the terminal repair kit that best matches the color and gage of the wire being
repaired. 2. Cut the repair wire to the proper length and remove one-half (1/2) inch of insulation. 3.
Splice the repair wire to the wire harness (see wire splicing procedure). 4. Insert the repaired wire
into the connector. 5. Install the connector locking wedge, if required, and reconnect the connector
to its mating half/component. 6. Re-tape the wire harness starting at 1-1/2 inches behind the
connector and 2 inches past the repair. 7. Connect battery and test all affected systems.
Wire Splicing
STANDARD PROCEDURE - WIRE SPLICING
When splicing a wire, it is important that the correct gage be used as shown in the wiring diagrams.
1. Remove one-half (1/2) inch of insulation from each wire that needs to be spliced. 2. Place a
piece of adhesive lined heat shrink tubing on one side of the wire. Make sure the tubing will be long
enough to cover and seal the entire
repair area.
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Jeep Liberty 2wd Workshop Manual (V6-3.7L VIN K (2003))
Jeep Workshop Manuals > Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor
Relay > Component Information > Diagrams > Diagram Information and Instructions > Page 84
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