automatically change the reflectance of the inside
rear view mirror in order to reduce the glare of head-
lamps approaching the vehicle from the rear. The
automatic day/night rear view mirror receives bat-
tery current through a fuse in the junction block only
when the ignition switch is in the ON position.

OUTSIDE REAR VIEW MIRROR

The power operated outside rear view mirrors

allow the driver to adjust both outside mirrors elec-
trically from the driver side front seat position by
operating a switch on the driver side front door trim
panel.

OPERATION

AUTOMATIC DAY/NIGHT MIRROR

A switch located on the bottom of the automatic

day/night mirror housing allows the vehicle operator
to select whether the automatic dimming feature is
operational. When the automatic day/night mirror is
turned on, the mirror switch is lighted by an integral
Light-Emitting Diode (LED). The mirror will auto-
matically disable its self-dimming feature whenever
the vehicle is being driven in reverse.

Refer to the owner’s manual for more information

on the features, use and operation of the automatic
day/night mirror system.

OUTSIDE REAR VIEW MIRROR

The power mirrors receive a non-switched battery

feed through a fuse in the junction block so that the
system will remain operational, regardless of the
ignition switch position.

DIAGNOSIS AND TESTING - POWER MIRRORS

WIRING VOLTAGE TEST

The following wiring test determines whether or

not voltage is continuous through the body harness
to switch.

(1) Remove the power mirror switch.
(2) Disconnect wire harness connector from back of

power mirror switch.

(3) Connect the clip end of a 12 volt test light to

Pin 11 in the mirror switch harness connector. Touch
the test light probe to Pin 9.

If the test light illuminates, the wiring circuit

between the battery and switch is OK.

If the lamp does not illuminate, first check fuse in

the Junction Block (JB). If circuit breaker is OK,
then check for a broken wire.

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.

SIDE REPEATER LAMP TEST

Some vehicles are equipped with side repeater

lamps integral to the sideview mirror. If the LED’s
within the mirror do not operate and the other
within the system do, proceed with the side repeater
lamp test. Refer to the appropriate wiring informa-
tion. The wiring information includes wiring dia-

POWER MIRRORS

8N - 7

grams, proper wire and connector repair procedures,
details of wire harness routing and retention, connec-
tor pin-out information and location views for the
various wire harness connectors, splices and grounds.

(1) Remove the door trim panel (Refer to 23 -

BODY/DOOR - FRONT/TRIM PANEL - REMOVAL).

(2) Disconnect wire harness connector from mirror.
(3) Turn the ignition to the ON position and actu-

ate the turn signal on the appropriate side.

(4) Using a 12–volt test light, check for voltage at

pin 12 (left side) or pin 8 (right side) while turn sig-
nals are functioning.

(5) Check for ground at pin 1.
If the test light does not illuminate, check for a

broken or shorted wire.

If the test light illuminates, the wiring circuit

between the turn signal switch and the mirror wire
harness connector is OK. Replace the mirror assem-
bly.

POWER MIRROR MOTOR TEST

If the power mirror switch is receiving proper cur-

rent and ground and mirrors do not operate, proceed
with power mirror motor test. Refer to the appropri-
ate

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 connec-
tors, splices and grounds.

(1) Remove the power mirror switch.
(2) Disconnect wire harness connector to power

mirror switch (Fig. 1).

(3) Using two jumper wires:
• Connect one to a 12 volt source

• Connect the other to a good body ground

• Refer to the Mirror Motor Test Chart for proper

wire connections at the switch connector

(4) If results shown in table are not obtained,

check for open or shorted circuit. Replace mirror
assembly as necessary.

MIRROR MOTOR TEST

MIRROR SWITCH CONNECTOR

B (+)

B (-)

MIRROR REACTION

LEFT

RIGHT

PIN 12

PIN 6

PIN 13

PIN 1

PIN 6

PIN 12

DOWN

PIN 1

PIN 13

DOWN

PIN 6

PIN 7

RIGHT

PIN 1

PIN 8

RIGHT

PIN 7

PIN 6

LEFT

PIN 8

PIN 1

LEFT

DOOR CONNECTOR

PIN 6

PIN 2

PIN 6

DOWN

PIN 2

PIN 5

RIGHT

PIN 5

PIN 2

LEFT

PIN 1

PIN 3

HEATER

Fig. 1 Connector Pin Call-Out

8N - 8

POWER MIRRORS

POWER MIRRORS (Continued)

AUTOMATIC DAY / NIGHT
MIRROR

DESCRIPTION

The automatic day/night mirror uses a thin layer

of electrochromic material between two pieces of con-
ductive glass to make up the face of the mirror.
When the mirror switch is in the On position, two
photocell sensors are used by the mirror circuitry to
monitor external light levels and adjust the reflec-
tance of the mirror.

OPERATION

The ambient photocell sensor is located on the for-

ward-facing (windshield side) of the rear view mirror
housing, and detects the ambient light levels outside
of the vehicle. The headlamp photocell sensor is
located inside the rear view mirror housing behind
the mirror glass and faces rearward, to detect the
level of the light being received at the rear window
side of the mirror. When the circuitry of the auto-
matic day/night mirror detects that the difference
between the two light levels is too great (the light
level received at the rear of the mirror is much
higher than that at the front of the mirror), it begins
to darken the mirror.

The automatic day/night mirror circuitry also mon-

itors the transmission using an input from the
backup lamp circuit. The mirror circuitry is pro-
grammed to automatically disable its self-dimming
feature whenever it senses that the transmission
backup lamp circuit is energized.

The automatic day/night mirror is a completely

self-contained unit and cannot be repaired. If faulty
or damaged, the entire mirror assembly must be
replaced.

DIAGNOSIS AND TESTING - AUTOMATIC
DAY/NIGHT INSIDE MIRROR

For complete circuit diagrams, refer to the appro-

priate 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 connec-
tors, splices and grounds.

(1) Check the fuse in the junction block. If OK, go

to Step 2. If not OK, repair the shorted circuit or
component as required and replace the faulty fuse.

(2) Turn the ignition switch to the On position.

Check for battery voltage at the fuse in the junction

block. If OK, go to Step 3. If not OK, repair the open
circuit to the ignition switch as required.

(3) Turn the ignition switch to the Off position.

Disconnect and isolate the battery negative cable.
Unplug the wire harness connector from the auto-
matic day/night mirror. Connect the battery negative
cable. Turn the ignition switch to the On position.
Check for battery voltage at the fused ignition switch
output (run/start) circuit cavity of the automatic day/
night mirror wire harness connector. If OK, go to
Step 4. If not OK, repair the open circuit to the junc-
tion block as required.

(4) Turn the ignition switch to the Off position.

Disconnect and isolate the battery negative cable.
Check for continuity between the ground circuit cav-
ity of the automatic day/night mirror wire harness
connector and a good ground. There should be conti-
nuity. If OK, go to Step 5. If not OK, repair the cir-
cuit to ground as required.

(5) Connect the battery negative cable. Turn the

ignition switch to the On position. Set the parking
brake. Place the transmission gear selector lever in
the Reverse position. Check for battery voltage at the
backup lamp switch output circuit cavity of the auto-
matic day/night mirror wire harness connector. If
OK, go to Step 6. If not OK, repair the open circuit
as required.

(6) Turn the ignition switch to the Off position.

Disconnect the battery negative cable. Plug in the
automatic day/night mirror wire harness connector.
Connect the battery negative cable. Turn the ignition
switch to the On position. Place the transmission
gear selector lever in the Neutral position. Place the
mirror switch in the On (the LED in the mirror
switch is lighted) position. Cover the forward facing
ambient photocell sensor to keep out any ambient
light.

NOTE: The ambient photocell sensor must be cov-
ered completely, so that no light reaches the sen-
sor. Use a finger pressed tightly against the sensor,
or cover the sensor completely with electrical tape.

(7) Shine a light into the rearward facing head-

lamp photocell sensor. The mirror glass should
darken. If OK, go to Step 8. If not OK, replace the
faulty automatic day/night mirror unit.

(8) With the mirror glass darkened, place the

transmission gear selector lever in the Reverse posi-
tion. The mirror should return to its normal reflec-
tance. If not OK, replace the faulty automatic day/
night mirror unit.

POWER MIRRORS

8N - 9

POWER MIRROR SWITCH

DESCRIPTION

The mirror switch on the door trim panel operates

both the outside rear view mirrors. On vehicles
equipped with Memory/Heated Seats, the Memory
Heated Seat Mirror Module (MHSMM) activates the
drivers side mirror motor in recall mode.

OPERATION

Position sensing potentiometers are built into the

drivers side mirror vertical and horizontal motor
assembly. These potentiometers provide a sense volt-
age to the MHSMM that indicates where the actual
location of the mirror is. If a memory position is set,
the values of the potentiometers at that location are
stored in memory.

DIAGNOSIS AND TESTING - POWER MIRROR
SWITCH

(1) Remove power mirror switch.
(2) Disconnect wire harness connector from back of

power mirror switch.

(3) Using an ohmmeter, test for continuity between

the terminals of the switch (Fig. 2) as shown in the
Mirror Switch Test table.

(4) If test results are not obtained as shown in the

Mirror Switch Test table, replace the switch.

MIRROR SWITCH TEST

SWITCH POSITION

MOVE BUTTON

CONTINUITY BETWEEN

TERMINALS

MIRROR IN

POSITION

PIN 11 TO 12
PIN 12 TO 13
PIN 9 TO 1

RIGHT

PIN 11 TO 1
PIN 9 TO 7
PIN 9 TO 8

DOWN

PIN 11 TO 1
PIN 9 TO 12
PIN 9 TO 13

LEFT

PIN 11 TO 7
PIN 11 TO 8
PIN 9 TO 1

MIRROR IN

POSITION

PIN 11 TO 12
PIN 11 TO 13
PIN 9 TO 2

RIGHT

PIN 11 TO 6
PIN 9 TO 7
PIN 9 TO 8

DOWN

PIN 11 TO 6
PIN 9 TO 12
PIN 9 TO 13

LEFT

PIN 11 TO 7
PIN 11 TO 8
PIN 9 TO 6

REMOVAL

(1) Disconnect and isolate the battery negative

cable.

(2) Using a trim stick, remove power mirror switch

from mounting position.

(3) Disconnect wire connector.
(4) Remove switch.

INSTALLATION

(1) Connect the wire connector to the switch.
(2) Insert power mirror switch to the mounting

position.

(3) Connect battery negative cable.

SIDEVIEW MIRROR

REMOVAL

For removal procedure, (Refer to 23 - BODY/EXTE-

RIOR/SIDE VIEW MIRROR - REMOVAL)

Fig. 2 Mirror Switch Connector Pin Call-Out

8N - 10

POWER MIRRORS

Content .. 99 100 101 102 ..