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Jeep Liberty KJ. Manual - part 140

*TEMP DISPLAY INOPERATIVE OR WRONG

For a complete wiring diagram Refer to Section 8W.

Possible Causes

AMBIENT TEMPERATURE SENSOR

EVIC INOPERATIVE

Diagnostic Test

AMBIENT TEMPERATURE SENSOR

NOTE: Diagnose and repair any PCM, EVIC, or Communication DTCs before proceeding with this test.

NOTE: The Ambient Temperature Sensor is hardwired to the PCM. Ambient temperature information is trans-
mitted to the EVIC via the PCI Bus.
Turn the ignition off.

Disconnect the Ambient Temperature Sensor harness connector.

Measure the resistance of the Ambient Temperature Sensor using the following temperature/resistance values:

10°C (50°F) Sensor Resistance = 17.99 - 21.81 Kilohms

20°C (68°F) Sensor Resistance = 11.37 - 13.61 Kilohms

25°C (77°F) Sensor Resistance = 9.12 - 10.88 Kilohms

30°C (86°F) Sensor Resistance = 7.37 - 8.75 Kilohms

40°C (104°F) Sensor Resistance = 4.90 - 5.75 Kilohms

50°C (122°F) Sensor Resistance = 3.33 - 3.88 Kilohms

Is the Ambient Temperature Sensor resistance measurement between the min/max specifications?

Yes

>> Go To 2

>> Replace the Ambient Temperature Sensor. NOTE: After any repair for an Ambient Temperature Sensor

problem, the vehicle must be driven over 5 kilometers (3 miles) above 40 km/h (25 MPH) to update the
EVIC display.

Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)

EVIC INOPERATIVE

Perform the EVIC self test.

Turn the ignition off.

Press and hold the C/T and Reset buttons.

Turn the ignition on.

NOTE: The self test can also be performed using the scan tool.
Observe the EVIC display at the conclusion of the self test.

Does the EVIC display

(

PASSED SELF TEST

(

Yes

>> Test Complete.

>> Replace the EVIC in accordance with the Service Information.

Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)

8M - 22

OVERHEAD CONSOLE - ELECTICAL DIAGNOSTICS

OVERHEAD CONSOLE-SERVICE INFO

TABLE OF CONTENTS

page

OVERHEAD CONSOLE-SERVICE INFO

DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
DIAGNOSIS AND TESTING - OVERHEAD

CONSOLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

STANDARD PROCEDURE

STANDARD PROCEDURE - MODULE LAMP

REPLACEMENT

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

STANDARD PROCEDURE - COURTESY

LAMP REPLACEMENT. . . . . . . . . . . . . . . . . . . . . . 25

STANDARD PROCEDURE - COMPASS

CALIBRATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

STANDARD PROCEDURE - COMPASS

DEMAGNETIZING.. . . . . . . . . . . . . . . . . . . . . . . . . . 26

STANDARD PROCEDURE - COMPASS

VARIATION ADJUSTMENT. . . . . . . . . . . . . . . . . . . 27

STANDARD PROCEDURE - ELECTRONIC

VEHICLE INFORMATION CENTER
PROGRAMMING. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

REMOVAL

OVERHEAD CONSOLE - REMOVAL . . . . . . . . . . 31

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

ELECTRONIC VEHICLE INFO CENTER

DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
DIAGNOSIS AND TESTING - ELECTRONIC

VEHICLE INFORMATION CENTER . . . . . . . . . . . . 34

REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

UNIVERSAL TRANSMITTER

DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
DIAGNOSIS AND TESTING - UNIVERSAL

TRANSMITTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

STANDARD PROCEDURE

STANDARD PROCEDURE - ERASING

TRANSMITTER CODES

. . . . . . . . . . . . . . . . . . . . . . 38

STANDARD PROCEDURE - PROGRAMMING

TRANSMITTER CODES

. . . . . . . . . . . . . . . . . . . . . . 38

AMBIENT TEMP SENSOR

DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
DIAGNOSIS AND TESTING

DIAGNOSIS AND TESTING - AMBIENT

TEMPERATURE SENSOR. . . . . . . . . . . . . . . . . . . 39

DIAGNOSIS AND TESTING - AMBIENT

TEMPERATURE SENSOR CIRCUIT

. . . . . . . . . . . 39

REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

OVERHEAD CONSOLE-SERVICE INFO

8M - 23

OVERHEAD CONSOLE-SERVICE INFO

DESCRIPTION

An overhead console is standard factory-installed
equipment on this model. The overhead console
includes an Electronic Vehicle Information Center
Module. Some overhead consoles also contain a uni-
versal garage door transmitter. All overhead consoles
are equipped with two reading and courtesy lamps.
On vehicles equipped with a power sunroof, the sun-
roof switch is located between the two reading and
courtesy lamps. The overhead console is mounted
with one screw in the front and two snap clips in the
rear. A molded plastic retainer bracket located above
the headliner is used to provide secure overhead con-
sole attachment.

If any of the EVIC functions are faulty or damaged,
the complete Electronic Overhead Module (EOM)
must be replaced. Replaceable overhead console
components include:

•

The incandescent bulbs used for push button
back-lighting

•

Courtesy lamps

•

Courtesy lamp lens

•

EOM

•

The overhead console housing

OPERATION

Refer to the vehicle Owner’s Manual for specific operation of overhead console and its systems.

DIAGNOSIS AND TESTING - OVERHEAD CONSOLE

The most reliable, efficient, and accurate means to diagnose the overhead console or related system requires the
use of a scan tool and the Service and Body Diagnostic Procedures Manuals. The scan tool can provide vital infor-
mation to the technician trying to find a problem with a overhead console component. Diagnostic logic is built into
the overhead console mounted module to help the person trying to locate the problem by the most efficient means
possible. Anytime a problem is suspected, a scan tool must be obtained and used to retrieve any stored fault codes
in the module. If diagnostic fault codes are present in the module, record them on a piece of paper immediately
before proceeding any further. Then, use these fault codes to identify the problem by verifying the fault code. Exam-
ple, If the module records “TIRE PRESSURE N/A” fault, locate the diagnostic procedure for this code in the appro-
priate Body Diagnostic Procedures Manual and follow the flow chart until the specific problem is located and
resolved. Once the problem is thought to be corrected, erase the stored fault code using the scan tool and verify
correct system operation. If the tire pressure monitoring system is functioning correctly, verify that there are no other
stored codes in the module and return the vehicle to service.

If the fault code could not be verified, such as not finding anything wrong when following the diagnostic flow chart
in the Body Diagnostic Procedures Manual. This is a good indication that an INTERMITTENT problem may be
present. You must than attempt to find the intermittent problem, such as running a tire pressure monitoring system
self test. Refer to the Tires/Wheels section for more information. Always, eliminate all other potential problems
before attempting to replace the module.

TESTING VOLTAGE AND GROUND SUPPLY TO OVERHEAD CONSOLE

1. Remove the overhead console from the headliner (Refer to 8 - ELECTRICAL/OVERHEAD CONSOLE -

REMOVAL) Disconnect the overhead console electrical connector. Check the fused B(+) circuit in the overhead
console electrical connector. If OK, go to Step 2. If not OK, repair the open circuit or component as required.
Refer to the Wiring section for detailed schematics.

8M - 24

OVERHEAD CONSOLE-SERVICE INFO

2. Check the IGN RUN B(+) circuit in the overhead console electrical connector. If OK, go to Step 3. If not OK,

repair the open IGN RUN B(+) circuit as required.

3. Check the Ground circuit in the overhead console electrical connector. If OK, go to Step 4. If not OK, repair the

open ground circuit as required.

4. If the tire pressure monitoring system is not operating properly, refer to the Tires/Wheels section for more infor-

mation on the tire pressure monitoring system.

NOTE: If the compass functions, but accuracy is suspect, it may be necessary to perform a variation adjust-
ment. This procedure allows the compass unit to accommodate variations in the earth’s magnetic field
strength, based on geographic location. Refer to Compass Variation Adjustment in the Standard Procedures
section of this group.

NOTE: If the compass reading displays dashes, and only “CAL” appears in the display, demagnetizing may
be necessary to remove excessive residual magnetic fields from the vehicle. Refer to Compass Demagne-
tizing in the Standard Procedures section of this group.

STANDARD PROCEDURE

STANDARD PROCEDURE - MODULE LAMP REPLACEMENT

1. Remove the overhead console (1), (Refer to 8 -

ELECTRICAL/OVERHEAD

CONSOLE

REMOVAL).

2. Using a flat blade screwdriver twist out socket/lamp

(3).

3. Replace lamp(s) as necessary.

STANDARD PROCEDURE - COURTESY LAMP REPLACEMENT

1. Open hood, disconnect and isolate the negative battery cable.

2. Remove the overhead console from the headliner.

3. Remove the lamp and socket assembly from the overhead console.

4. Remove the lamp bulb by pulling it straight out of its socket.

STANDARD PROCEDURE - COMPASS CALIBRATION

CAUTION: Do not place any external magnets, such as magnetic roof mount antennas, in the vicinity of the
compass. Do not use magnetic tools when servicing the overhead console.

The electronic compass unit features a self-calibrating design, which simplifies the calibration procedure. This fea-
ture automatically updates the compass calibration while the vehicle is being driven. This allows the compass unit

OVERHEAD CONSOLE-SERVICE INFO

8M - 25

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