Jeep Liberty KJ. Manual — part 37

TESTING WITHOUT SCAN TOOL

NOTE: For circuit descriptions and diagrams of the rear window defogger (EBL) system, refer to 8W - WIR-
ING DIAGRAM INFORMATION.

1. Remove the A/C-heater control from the instrument

panel (Refer to 24 - HEATING & AIR CONDITION-
ING/CONTROLS/CONTROL-A/C

HEATER

REMOVAL).

2. Using a ohmmeter, check for continuity between

the ground circuit cavity of the defogger switch wire
harness connector and a good ground. There
should be continuity. If OK, go to Step 3. If not OK,
repair the open circuit as required.

3. Check for continuity between the ground circuit ter-

minal and the rear window defogger relay output
terminal (3) on the back of the A/C-heater control.
There should be momentary continuity as the
defogger switch is pressed, and then no continuity.
If OK, (Refer to 8 - ELECTRICAL/HEATED GLASS
- DIAGNOSIS AND TESTING). If not OK, replace
the faulty A/C-heater control.

8G - 22

HEATED GLASS - SERVICE INFORMATION

HEATED MIRRORS - SERVICE INFORMATION

TABLE OF CONTENTS

page

HEATED MIRRORS - SERVICE INFORMATION

DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

HEATED MIRRORS - SERVICE INFORMATION

8G - 23

HEATED MIRRORS - SERVICE INFORMATION

DESCRIPTION

The optional heated mirror system is controlled by the
momentary rear window defogger switch (1) which is
integral to the A/C-heater control (2). An amber indica-
tor lamp in the switch will illuminate to indicate when
the rear window defogger (EBL) system is turned on.

The heated mirror system only operates in concert
with the EBL system, and will automatically turn off
after a programmed time interval of about 10 minutes
as long as the ignition switch is the Run position. After
the initial time interval has expired, if the rear window
defogger switch is turned on again during the same
ignition cycle, the heated mirror system will automati-
cally turn off after about 5 minutes. The heated mirror
system will also turn off if the ignition switch is turned
to any position other than Run or by manually press-
ing the rear window defogger switch a second time.

OPERATION

When the rear window defogger switch is pressed, the rear window defogger (EBL) system becomes activated and
an electric heater grid located behind the glass of each of the outside rear view mirrors is energized. When ener-
gized, each of these heater grids produce heat to help clear the outside rear view mirrors of ice, snow, or fog.

If the outside mirror heating grids are both inoperative, (refer to 8 - ELECTRICAL/HEATED GLASS - DIAGNOSIS
AND TESTING) in this group. If only one of the outside mirror heating grids is inoperative, (refer to 8 - ELECTRI-
CAL/POWER MIRRORS - DIAGNOSIS AND TESTING).

The heating grid behind each outside mirror glass cannot be repaired and, if faulty or damaged, the mirror glass
must be replaced (refer to 23 - BODY/EXTERIOR/GLASS-OUTSIDE REARVIEW MIRROR - REMOVAL).

8G - 24

HEATED MIRRORS - SERVICE INFORMATION

HEATED SEAT SYSTEM-SERVICE INFO

TABLE OF CONTENTS

page

HEATED SEAT SYSTEM-SERVICE INFO

DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
DIAGNOSIS AND TESTING - HEATED SEAT

SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

HEATED SEAT SWITCH

DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
DIAGNOSIS AND TESTING

HEATED SEAT SWITCH . . . . . . . . . . . . . . . . . . . . . 28

REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29