Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Jeep Cherokee XJ 1997.1999-2001 Approved 1999 XJ Jeep Cherokee EXJ_8T

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EXJ_8T

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XJ POWER MIRROR SYSTEMS 8T - 1

POWER MIRROR SYSTEMS
CONTENTS

page page

GENERAL INFORMATION DIAGNOSIS AND TESTING
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . 1 POWER MIRROR SYSTEM . . . . . . . . . . . . . . . . . 2
POWER MIRROR SYSTEM . . . . . . . . . . . . . . . . . 1 REMOVAL AND INSTALLATION
DESCRIPTION AND OPERATION DOOR MODULE . . . . . . . . . . . . . . . . . . . . . . . . . 4
DOOR MODULE . . . . . . . . . . . . . . . . . . . . . . . . . 2 POWER MIRROR . . . . . . . . . . . . . . . . . . . . . . . . 5
POWER MIRROR . . . . . . . . . . . . . . . . . . . . . . . . 1 POWER MIRROR SWITCH . . . . . . . . . . . . . . . . . 4
POWER MIRROR SWITCH . . . . . . . . . . . . . . . . . 1

GENERAL INFORMATION Following are general descriptions of the major
components in the power mirror system. Refer to the
INTRODUCTION owner's manual in the vehicle glove box for more
Power operated or power operated and heated out- information on the features, use and operation of the
side rear view mirrors are available factory-installed power mirror system.
options on this model. Refer to 8W-62 - Power Mir-
rors in Group 8W - Wiring Diagrams for complete cir- DESCRIPTION AND OPERATION
cuit descriptions and diagrams.

NOTE: This group covers both Left-Hand Drive POWER MIRROR
(LHD) and Right-Hand Drive (RHD) versions of this Each power mirror head contains two electric
model. Whenever required and feasible, the RHD motors, two drive mechanisms, and the mirror glass.
versions of affected vehicle components have been One motor and drive controls mirror up-and-down
constructed as mirror-image of the LHD versions. movement, and the other controls right-and-left
While most of the illustrations used in this group movement.
represent only the LHD version, the diagnostic and The power mirrors in vehicles equipped with the
service procedures outlined can generally be available heated mirror option also include an elec-
applied to either version. Exceptions to this rule tric heating grid located behind the mirror glass.
have been clearly identified as LHD or RHD, if a This heating grid is energized by the rear window
special illustration or procedure is required. defogger relay whenever the rear window defogger
system is turned on. Refer to Group 8N - Electrically
Heated Systems for more information on the opera-
POWER MIRROR SYSTEM tion of the rear window defogger system.
The power operated or power operated and heated The power mirror assembly cannot be repaired.
outside rear view mirrors allow the driver to adjust Only the mirror glass is serviced separately. If any
both outside mirrors electrically from the driver seat other component of the power mirror unit is faulty or
position by operating a switch on the driver side damaged, the entire assembly must be replaced.
front door trim panel. The power mirrors receive bat-
tery current through a fuse in the junction block, and POWER MIRROR SWITCH
will only operate when the ignition switch is in the Both the right and left power outside mirrors are
On or Accessory positions. controlled by a single multi-function switch unit
The heated mirror option includes an electric heat- located on the driver side front door trim panel. Two
ing grid behind the mirror glass in each outside mir- versions of this switch are offered. Models without
ror, which can clear the mirror glass of ice, snow, or power windows or power locks have a stand-alone
fog. The heating grid receives fused battery current switch mounted in the driver side front door trim
through the rear window defogger relay only when panel. Models equipped with power windows and
the rear window defogger system is turned on. Refer power locks have a power mirror switch that is inte-
to Group 8N - Electrically Heated Systems for more gral to the Driver Door Module (DDM).
information on the rear window defogger system. Both versions of the switch are operated in the
same manner. A three position rocker-type mirror
8T - 2 POWER MIRROR SYSTEMS XJ
DESCRIPTION AND OPERATION (Continued)
selector switch is moved right (right mirror control), (4) Turn the ignition switch to the Off position.
left (left mirror control), or center to turn the power Disconnect and isolate the battery negative cable.
mirrors off. Then one of four directional control but- Remove the driver side front door trim panel and
tons is depressed to control movement of the selected unplug the DDM wire harness connectors. Connect
mirror up, down, right, or left. The directional control the battery negative cable. Turn the ignition switch
buttons of the DDM-mounted switch are illuminated to the On position. Check for battery voltage at the
when the ignition switch is in the On or Accessory fused ignition switch output circuit cavity of the
positions. The stand-alone switch is not illuminated. 12-way DDM wire harness connector. If OK, replace
The stand-alone power mirror switch cannot be the faulty DDM. If not OK, repair the open circuit to
repaired and, if faulty or damaged, it must be the power window circuit breaker in the junction
replaced as a complete unit. If the DDM power mir- block as required.
ror switch is faulty or damaged, the entire DDM unit (5) If the problem being diagnosed is an inopera-
must be replaced. tive power mirror electric heating grid, proceed as
follows. If not, go to Step 8. Disconnect and isolate
DOOR MODULE the battery negative cable. Remove the front door
A Driver Door Module (DDM) and a Passenger trim panel on the side of the vehicle with the inoper-
Door Module (PDM) are used on all models equipped ative mirror heating grid. Unplug the wire harness
with power locks and power windows. Each door connector at the mirror. Check for continuity between
module houses both the front door power lock and the ground circuit cavity in the body half of the
power window switches. In addition to the switches power mirror wire harness connector and a good
for its own door, the DDM houses individual switches ground. If OK, go to Step 6. If not OK, repair the
for each passenger door power window, a power win- open circuit to ground as required.
dow lockout switch, the power mirror switch, and cir- (6) Connect the battery negative cable. Turn the
cuitry to support the one-touch down feature of the ignition switch to the On position. Turn on the rear
driver side front door power window. The PDM also window defogger system. Check for battery voltage at
houses the control circuitry and the power lock and the rear window defogger relay output circuit cavity
unlock relays for the power lock system. in the body half of the power mirror wire harness
The DDM and the PDM are mounted to their connector. If OK, go to Step 7. If not OK, repair the
respective front door trim panels. The DDM and open circuit to the rear window defogger relay as
PDM are serviced individually and cannot be required.
repaired. If the DDM or PDM, or any of the switches (7) Check for continuity between the ground cir-
and circuitry that they contain are faulty or dam- cuit and the rear window defogger relay output cir-
aged, the complete DDM or PDM unit must be cuit cavities in the mirror half of the power mirror
replaced. wire harness connector. There should be continuity. If
not OK, replace the faulty power mirror. If OK, check
the resistance through the electric heating grid cir-
DIAGNOSIS AND TESTING cuit. Correct resistance through the electric heating
grid should be from 10 to 16 ohms when measured at
POWER MIRROR SYSTEM an ambient temperature of 21

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