seats CHEVROLET DYNASTY 1993 User Guide

SYSTEM SOFT LIMITS
This portion of the system becomes activated when
the control module must shut off a specific seat, re-
cliner or mirror motor because it has reached the end
of its travel. When a mechanical stall condition is de-
tected, the control module will set a soft limit in its
memory and will not allow the motor to be driven
past that point. To override the soft limits, activate the seat or re-
cliner switch twice in the desired direction holding
the switch activated until the end of travel has been
reached. Reactivate and hold the switch once more
for three seconds. This will cause new soft limits to
be set in the control module.
SETTING SYSTEM SOFT LIMITS
If the control module or motor assemblies have
been replaced, the control module must learn its new
soft limits. To do this, perform the memory seat di-
agnostic self-test. After the tests are completed, the
control module will have learned and memorized its
new soft limits.
TEST PROCEDURES
Before any testing is attempted, the battery should
be carefully charged and all connections and termi-
nals cleaned and tightened to insure proper continu-
ity and grounds.
MEMORY SEAT AND MIRROR DIAGNOSTIC
SELF-TESTS
The system has a built-in set of three self-tests
which check all components in the system while giv-
ing a visual feedback. To enter the first self-test mode, switch test, press
memory position 1 and 2 buttons, hold for at least
five seconds and no longer than ten seconds. Follow
this immediately by pressing the Set button and hold
for at least five seconds but less than ten seconds.
Three seconds after the button is released, the seat,
recliner and mirrors will move to a mid-travel posi-
tion. Within ten seconds, press and release a seat
button to activate a seat or recliner motor. All
switches except the mirror switches may now be
tested one at a time. The memory switches, Position
1 and 2 and Set buttons, may also be tested. A good
switch contact actuation will NOD the seat. The seat
nod consists of seat front up and seat track forward
followed by seat front down and seat track rearward.
The nod also includes both outside power rear view
mirrors operating in the vertical plane. The system
will continue NODDING for good switches until 10
seconds pass without any switch actuation. Within 10 seconds of the last seat nod, press mem-
ory position 1 and 2 buttons for at least 5 seconds
Fig. 9 Seat AdjusterÐAA Body
8R - 6 POWER SEATS Ä

Fig. 10 Seat AdjusterÐAP Body
Fig. 11 Seat AdjusterÐAG Body
Fig. 12 Enthusiast SeatÐAG and AJ Bodies
Ä POWER SEATS 8R - 7

but less than 10 seconds, and then release. The seat
will move, after 3 seconds, to a full down and rear-
ward position. This is the seat check mode. The control module
will now move the motors to a stall in forward, rear-
ward, front up, front down, rear up, rear down, re-
cliner forward, and recliner rear ward positions. If a
problem exists, the control module will not move that
part of the seat. After all motors have been run to
stall, the system will pause for 3 seconds, then re-
turn to the mid-travel position. The control module will now move the seat through
its positions for two seconds run time. If a problem has been found, the control module
will go into a loop and just move the problem part of
the system. To exit the loop, press the Set or Position
1 or 2 buttons or repair the fault; i.e.: repair a ter-
minal push out, etc. When the seat movements are complete, the sys-
tem will return to its normal operating mode unless
memory Position 1 and 2 buttons are held for at least
five seconds, but less than ten seconds and then re-
leased. The seat will return to its mid-travel position
and the mirrors will move full downward and to the
left. This is the mirror check mode. The control mod-
ule will then move the right mirror fully horizontal
outboard, and horizontal inboard. This is followed by
the left mirror fully horizontal inboard, horizontal
out board, vertical up, and vertical down. Each motor
will be driven until the associated mirror plane face
has been stalled for up to 1-1/2 seconds at each end
of travel. If the control module encounters a problem
with any position sensing rheostat that is connected
to each motor, that particular motor will not be ac-
tuated. After an other three second pause, the control
module will again try running the mirror motors in
the directions given above plus the right mirror ver-
tical up and vertical down. Any motor that has no
problem will run for two seconds in each of the given
directions. If a problem is found, the control module will go
into a loop and move only the problem part of the
system. To exit the loop, repair the fault, or press the
Set, Position 1 or 2 buttons. The control module will
then finish the motor actuation that are shown
Fig. 13 Seat Wing Switch Continuity
Fig. 14 Lumbar Switch Continuity
Fig. 15 Memory Seat Switch
8R - 8 POWER SEATS Ä

above. When the control module has finished, it will
return to the normal operating mode after ten sec-
onds if no further switches are activated.The control module will also return to normal op-
erating mode if any manual seat or recliner move-
ment switch is actuated during the ten second
timeout. If the system has found a problem, refer to the ap-
propriate diagnosis condition.
POWER MEMORY SEAT, RECLINER AND
MIRRORS DIAGNOSIS
Before any diagnosis is done on the system, move
the seat switches and listen for relays clicking in the
control module under the seat. If relays can be heard,
the main battery and ground circuits to the control
module as well as the battery circuit to the switches
in the driver's door are good. When checking for voltage or continuity, always
use a volt/ohm meter to get accurate readings. The
seat and recliner switches must be activated to check
for voltage at the seat and recliner motors or at the
input to the control module from the switches. The control module creates a special voltage supply
for the position sensing functions. It also shuts down
after five seconds, in order to check this or any other
voltage being fed back to the control module. A
switch may have to be activated more than once to
verify a voltage reading. The voltage from the con-
trol module that feeds the seat and recliner position
sensing potentiometer, will be between 4.5 to 5 volts.
For simplicity in the diagnosis section, the feed volt-
age will be called 5 volts. On the position sensing
wires, these voltages will always be less than 5 volts
but more than 0 volts. Typically the high level is at
a maximum of about 4.25 volts and the low level can
be as little as 0.1 volts. If any seat or recliner potentiometer or mirror
rheostat position sense wires are crossed, the control
module will not move that part of the system. The
seat or mirror will be in a fault diagnostic mode.
CONDITION: SYSTEM WILL NOT OPERATE.
PROCEDURE
(1) Check for forward/rearward operation of re-
cliner. If not operable, check for an open or loose cir-
cuit breaker mounted in board on the relay bank in
cavity 15. (2) Check for continuity between 2-way connector
under driver's seat and pin 1 at control module 10-
way connector (Fig. 16 and 17). (3) Check for continuity between 2-way connector
under driver's seat and pin 6 at control module 10-
way connector. (4) Check for any movement of the seat by operat-
ing the seat switch.If movement the circuit is good
into the control module. (5) No movement check for an open or loose fuse in
cavity 15 of the fuse block. (6) Check for battery voltage to pin 3 of driver's
power seat switch.
Fig. 16 Memory Seat Switch Continuity
Fig. 17 Memory Seat Module Connectors
Ä POWER SEATS 8R - 9

(7) If battery is good, check for continuity of driv-
er's power seat switch. Refer to Power Memory Seat
Switch Continuity (Fig. 16). (8) Check that all connectors are securely plugged
into control module under driver's seat with no ter-
minal push outs. (9) No correctable faults are found in the above
steps. The battery voltage and ground circuits are
good into the control module. There is battery volt-
age through the seat switch to the control module.
Then replace the control module. (10) If the control module must be replaced, open it
and observe the non-relay side of the printed circuit
board. The module may be damaged by an intermit-
tent short on the inside of the recliner switch. If a
trace is burnt open near the 10-way connector, may
be caused by the recliner switch (Fig. 18).
(11) If module is burnt, remove recliner switch.
Open the switch and observe the movable contacts
staking at the staked end. If the contact, arm can be
rotated, by a sideways motion, the switch must be re-
placed. This will prevent the new control module
from damaged by the switch.
CONDITION: NO RECLINER MOTION FORWARD OR REARWARD AND NO RELAYSCAN BE HEARD CLICKING WHEN THERECLINER SWITCH IS ACTIVATED.
PROCEDURE
(1) Check for battery voltage at pin 11 of the con-
trol module 21-way connector. (2) Check for battery voltage at pin 3 of the re-
cliner switch connector. (3) Check for ground at pin 1 of the control module
21-way connector. (4) Check for ground at both pins 1 and 5 of re-
cliner switch connector. If ground is missing at only
one of these pins, repair or replace the seat wiring
harness. (5) If battery voltage and ground are correct to the
recliner switch connector, check continuity of the re-
cliner switch. Refer to Left Power Memory Recliner
Switch Continuity (Fig. 19).
CONDITION: NO RECLINER MOTION FORWARD, AND A RELAY CAN BE HEARDCLICKING WHEN THE RECLINER SWITCH ISACTIVATED.
PROCEDURE
(1) Check for battery voltage at pin 2 of the control
module 10-way connector with the recliner switch ac-
tivated. (2) Check for ground at pin 4 of the control module
10-way connector with the recliner switch activated. (3) If battery voltage and ground are NOT present
at the above pins of the 10-way connector, replace
the control module. If battery and ground are
present, then continue procedure. (4) Check for battery voltage and ground at re-
cliner motor connector in seat. (5) If recliner motor will not operate, refer to Ser-
vice Procedure for Recliner Motor and Cable.
CONDITION: NO RECLINER MOTION REARWARD, AND RELAYS CAN BE HEARDCLICKING WHEN THE RECLINER SWITCH ISACTIVATED.
PROCEDURE
(1) Check for ground at pin 2 of the control module
10-way connector with the recliner switch activated.
Fig. 18 Memory Module Burnt Area
Fig. 19 Memory Recliner Switch Continuity
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(2) Check for battery voltage at pin 4 of the control
module 10-way connector with the recliner switch ac-
tivated. (3) If battery voltage and ground are NOT present
at the above pins of the 10-way connector, replace
the control module. If battery and ground are
present, then continue procedure. (4) Check for battery voltage and ground at re-
cliner motor connector in seat. (5) If recliner motor will not operate, refer to Ser-
vice Procedure for Recliner Motor and Cable.
CONDITION: NO RECLINER MANUAL MOVEMENT FORWARD OR REARWARD,RECLINER MOVES IN RECALL MODE ONLY.
PROCEDURE
(1) Check wiring harness in seat between control
module and recliner switch for shorted wires to
ground or crossed wires. If the ground pins 1 and 5
are in the wrong cavities of the recliner switch con-
nector, the control module may be damaged. Deter-
mine the cause and replace the control module after
repairing the wiring if necessary. (2) The recliner moves forward in the recall mode
only. Press the recliner switch in the forward direc-
tion and check for battery voltage at pin 2 of the re-
cliner switch connector and at pin 5 of the 21-way
control module connector. (3) The recliner moves rearward in the recall mode
only. Press the recliner switch in the rearward direc-
tion and check for battery voltage at pin 4 of the re-
cliner switch connector and at pin 6 of the 21-way
control module connector.
CONDITION: NO RECLINER MOVEMENT IN THE RECALL MODE, RECLINER WILL MOVEMANUALLY WITHOUT STALL DETECTION.
PROCEDURE
(1) Check for 5 volts at pin 9 of the control module
21-way connector (This is the 5 volt feed from the
control module to the recliner position sensing resis-
tor. (2) Check for ground at pin 7 of the 21-way control
module connector. To test for ground, one lead of the
voltmeter must be connected to the 5 volt supply for
the control module. If the sense voltage and ground
are NOT present, at the above pins of the 21-way
control module connector when the recliner switch is
pressed. Replace the control module since an in ad-
vertent application of battery voltage to the circuit
could damaged the control module. If the circuits are
present then continue this procedure. (3) Check for 5 volts at pin 2 of the black 5-way
connector plugged into the recliner motor end-bell. (4) Check for ground at pin 4 of the black 5-way
connector plugged into the recliner motor end-bell. (5) Unplug the black 5-way connector and observe
the male pins for deformation. If deformed, carefully
straighten to mate properly with the connector. Care-
fully reconnect 5-way connector. (6) Check for a voltage at pin 3 of the black 5-way
connector plugged into the recliner motor end-bell
with the recliner switch activated. Less than 5 volts
when fully forward and more than 0 volts when fully
reclined that is variable when the recliner is moving.
This is the position sense voltage the control module
must have or it will not move the recliner in recall
since it has no reference for movement. To test for
this voltage, one lead of the voltmeter must be con-
nected to either pin 4 of the black 5-way connector or
pin 7 of the 21-way connector. If the above steps
have been followed and the voltage is 0, check for a
seat wiring harness short to ground of this circuit,
repair as necessary, before continuing with this pro-
cedure. (7) Check for the position sense voltage at pin 3 of
the control module 21-way connector. If the voltage
appears correct, and varies as indicated in step (6)
above and there is continuity back to the 5-way con-
nector, then replace the control module.
CONDITION: NO SEAT OR RECLINER MOVEMENT FROM THE MANUAL SWITCHES.SEAT AND RECLINER WILL MOVE IN THERECALL MODE ONLY.
PROCEDURE
(1) Check for a stuck switch contact in the recliner
switch mounted in the driver's left seat side shield.
Refer to the Memory Recliner Switch Continuity
(Fig. 19). (2) Check for a stuck switch contact in the driver's
power seat switch. Refer to Memory Seat Switch
Continuity (Fig. 16).
CONDITION: NO MEMORY RECALL OF SEAT, RECLINER, OR MIRRORS. SEAT, RECLINER,AND MIRRORS WILL MOVE BY MANUALSWITCH ACTUATION ONLY.
PROCEDURE
(1) Check for a stuck switch contact in the memory
switch. Refer to the Memory Switch Continuity (Fig.
20). (2) Check for battery voltage pin 1 of the memory
switch (Fig. 20).
Ä POWER SEATS 8R - 11

CONDITION: NO MEMORY RECALL OF SEAT, RECLINER, OR MIRRORS TO POSITION 1ONLY. UNABLE TO ENTER DIAGNOSTIC SELFTEST MODES. POSITION 2 RECALL WORKS.
PROCEDURE
(1) Check for continuity of actuated memory posi-
tion 1 switch. Refer to the Memory Switch Continu-
ity (Fig. 19). If there is continuity, continue with
procedure. If not replace switch. (2) Check for a terminal push out at pin 2 of the
memory switch connector. (3) Check for battery voltage at pin 14 of the con-
trol module 25-way connector with position 1 switch
actuated. If battery voltage is OK. There is no termi-
nal push out, and the connector is properly seated.
But no reaction from the control module, manually
move the seat to a different position than 2. To in-
sure that the Position 1 is not simply a duplicate of
Position 2. If there is still no reaction of the control
module to the actuation of the Position 1 button,
then replace the control module.
CONDITION: NO MEMORY RECALL OF SEAT, RECLINER, OR MIRRORS TO POSITION 2ONLY. UNABLE TO ENTER DIAGNOSTIC SELFTEST MODES. POSITION 1 RECALL WORKS.
PROCEDURE
(1) Check for continuity of actuated memory Posi-
tion 2 button. Refer to the Memory Switch Continu-
ity (Fig. 20). If there is continuity, continue with
procedure. If not replace switch. (2) Check for a terminal push out at pin 3 of the
memory switch connector. (3) Check for battery voltage at pin 1 of the control
module 25-way connector with Position 2 button ac-
tuated. If battery voltage OK. There is no terminal
push out, and the connector is properly seated. But
no reaction from the control module, manually move
the seat to a different position than 1. To insure that
the position 2 is not simply a duplicate of position 1.
If there is still no reaction of the control module to
the actuation of the 2 switch, then replace the con-
trol module.
CONDITION: ACTUATION OF THE SET BUTTON WILL NOT SET ANY NEW POSITIONSIN MEMORY. UNABLE TO ENTERDIAGNOSTIC SELF TEST MODES. ONLYPREVIOUSLY SET MEMORY POSITIONS CANBE RECALLED.
PROCEDURE
(1) Check for continuity of actuated memory
switch Set button. Refer to the Memory Switch Con-
tinuity (Fig. 20). If there is continuity, continue with
procedure. If not replace switch. (2) Check for a terminal push out at pin 4 of the
memory switch connector. (3) Check for battery voltage at pin 2 of the control
module 25-way connector with the Set button actu-
ated. If battery voltage is OK, there is no terminal
push out, and the connector is properly seated then
replace the control module.
CONDITION: NO MEMORY POSITIONS CAN BE RECALLED AND THE MEMORY SEATDIAGNOSTIC SELF SWITCH CHECK IS THEONLY PART OF SELF TEST THAT WORKS.THE SEAT MOVES OK WITH MANUALSWITCH.
PROCEDURE
(1) Check for continuity of the seat belt buckle
switch in its unbuckled state. Operate the buckle
switch to ensure the contact opens when the seat belt
is buckled. (2) Check for continuity between pin 2 of the
2-way seat belt buckle switch connector, harness
side, to ground. (3) Check for continuity between pin 1 of the
2-way seat belt buckle switch connector, harness
side, to pin 13 of the control module 25-way connec-
tor.
CONDITION: MEMORY RECALLS CAN BE MADE WHILE THE VEHICLE IS IN MOTIONWITH THE SEAT BELT UNBUCKLED.
PROCEDURE
Check for continuity of the circuit between the left
side instrument panel blue 16-way connector cav-
Fig. 20 Memory Switch Continuity
8R - 12 POWER SEATS Ä

ity 9 and pin 7 of the control module 25-way connec-
tor. The vehicle speed sensor signal can be tested
with a volt/ohmmeter at pin 7 of the control module
25-way connector. Turn on the vehicle ignition and
check fo r a 5 volt signal as the vehicle is moved
about 3 to 5 feet. If not repair open wiring, terminal
push out, bad crimp, drive in vehicle speed sensor,
etc., as necessary to correct condition. Ensure that
the 25-way connector is plugged into the control
module securely. Road test vehicle after repairs have
been made to ensure that no recalls can occur while
moving.
CONDITION: INSTRUMENT CLUSTER SPEEDOMETER STAYS AT 0 MPH/ (0 KM/H)WHILE VEHICLE IS MOVING, BODYCOMPUTER DOES NOT LOCK DOORS AT 15MPH (24 KM/H), AND THE SPEED CONTROLWILL NOT ACCEPT A SPEED SET.
PROCEDURE
(1) Remove driver's seat anchor bolts and nuts. Ad-
just the driver's seat to a safe driving position. Dis-
connect the 25-way connector from the memory seat
control module. Replace the driver's seat anchor bolts
and nuts. Road test the vehicle to complete this diag-
nosis. If the doors lock, the cruise control accepts a
set, and the speedometer now works, replace the
Memory Seat control module. (2) After replacing the Memory Seat control mod-
ule, perform the memory seat diagnostic self tests.
This teaches the new module it's soft limits and now
re-road test the vehicle before returning it to the cus-
tomer.
CONDITION: NO SEAT MOVEMENT IN THE RECALL MODE, SEAT WILL MOVE BYMANUAL SWITCH ACTUATION IN ALLDIRECTIONS WITHOUT STALL DETECTION.
PROCEDURE
(1) Check for 5 volts at pin 10 of the control mod-
ule 25-way connector. This is the 5 volt feed from the
control module to the seat track position sensing po-
tentiometer. (2) Check for ground at pin 8 of the control module
25-way connector. To test for ground, one lead of the
voltmeter must be connected to either the 5 volt sup-
ply for the control module or the battery positive. If
the sense voltage and ground are NOT present at the
above pins of the 21-way control module connector.
When the seat switch is pressed, replace the control
module. An inadvertent application of battery volt-
age to the circuit could damaged the control module.
If the voltage and ground circuits are present then
continue this procedure. (3) Check for 5 volts at pin 5 of the natural 5-way
connector plugged into the power seat adjuster mo-
tors end-bell. (4) Check for ground at pin 4 of the natural 5-way
connector plugged into the power seat adjuster mo-
tors end-bell. If the power seat adjuster still has no
movement in the recall mode, then continue this pro-
cedure. (5) Disconnect the natural 5-way connector from
the power seat adjuster motors end-bell. (6) Check with an ohmmeter for a resistance read-
ing that may be from 2600 to 4000 ohms between
pins 4 and 5 of the motors end-bell connector. If
there is an open circuit reading or the reading ob-
tained falls outside this range, then replace the seat
motor package assembly. After replacement of the
seat motor package, reconnect all wiring connectors
and reinstall seat assembly in vehicle. Operate the
switches manually to cause maximum seat move-
ment in all directions. Perform the memory seat di-
agnostic self check so the control module will learn
the new soft limits of the assembly.
CONDITION: NO SEAT TRACK FORWARD OR REARWARD MOVEMENT IN THE RECALLMODE, SEAT TRACK WILL MOVE FORWARDOR REARWARD BY MANUAL SWITCHACTUATION WITHOUT STALL DETECTION.
PROCEDURE
(1) Check for a voltage at pin 12 of the control
module 21-way connector. Less than 5 volts for the
seat track fully forward and more than 0 volts when
fully rearward. This voltage should vary correspond-
ing to the position. (2) Check for a voltage at pin 1 of the natural
5-way connector, Same as in step (1) above. The
ground lead connected to pin 4 of the 5-way connec-
tor. If the voltage reading is at 0 volts, disconnect
the 5-way natural connector and check for a short to
ground in the harness. If no short is found, reconnect
the connector and continue the procedure. (3) Check for the voltage to vary as noted above, if
it does not vary as the seat track is moved forward
and rearward, the sensing potentiometer is defective.
Replace the seat motor package assembly. After re-
placement of the seat motor package, reconnect all
wiring connectors and reinstall seat assembly in ve-
hicle. Operate the switches manually to cause maxi-
mum seat movement in all directions. Perform the
memory seat diagnostic self check so the control
module will learn the new soft limits of the assem-
bly.
Ä POWER SEATS 8R - 13

CONDITION: NO SEAT TRACK FRONT UP OR DOWN MOVEMENT IN THE RECALL MODE,SEAT TRACK FRONT WILL MOVE UP ORDOWN BY MANUAL SWITCH ACTUATIONWITHOUT STALL DETECTION.
PROCEDURE
(1) Check for a voltage at pin 2 of the control mod-
ule 21-way connector. Less than 5 volts for the seat
track front full up and more than 0 volts when fully
down. (2) Check for a voltage at pin 2 of the natural
5-way connector. Same as in step (1) above. With the
ground lead of the meter at pin 4 of this connector. If
the voltage reading is at 0 volts, disconnect the
5-way natural connector and check for a short to
ground in the harness. If no short is found, reconnect
the connector and continue the procedure. (3) Check for the voltage to vary as noted above, if
it does not vary as the seat track front is moved up
and down, the sensing potentiometer is defective. Re-
place the seat motor package assembly. After re-
placement of the seat motor package, reconnect all
wiring connectors and reinstall seat assembly in ve-
hicle. Operate the switches manually to cause maxi-
mum seat movement in all directions. Perform the
memory seat diagnostic self check so the control
module will learn the new soft limits of the assem-
bly.
CONDITION: NO SEAT TRACK REAR UP OR DOWN MOVEMENT IN THE RECALL MODE,SEAT TRACK REAR WILL MOVE UP OR DOWNBY MANUAL SWITCH ACTUATION WITHOUTSTALL DETECTION.
PROCEDURE
(1) Check for a voltage at pin 13 of the control
module 21-way connector. Less than 5 volts for the
seat track rear full up and more than 0 volts when
fully down. (2) Check for a voltage at pin 3 of the natural
5-way connector. Same as in step (1) above. The
ground lead connected to pin 4 of the 5-way connec-
tor. If the voltage reading is at 0 volts, disconnect
the 5-way natural connector and check for a short to
ground in the harness. If no short is found, reconnect
the connector and continue the procedure. (3) Check for the voltage to vary as noted above, if
it does not vary as the seat track rear is moved up
and down, the sensing potentiometer is defective. Re-
place the seat motor package assembly. After re-
placement of the seat motor package, reconnect all
wiring connectors and reinstall seat assembly in ve-
hicle. Operate the switches manually to cause maxi-
mum seat movement in all directions. Perform the
diagnostic self seat check so the control module will
learn the new soft limits of the assembly.
CONDITION: NO MOVEMENT OF THE SEAT,
SEAT WILL MOVE IN THE RECALL MODEONLY.
PROCEDURE
(1) Check for battery voltage to terminal 3 of driv-
er's power seat switch. (2) Check for continuity of driver's power seat
switch. Refer to Memory Seat Switch Continuity
(Fig. 19). If switch is good, check for continuity be-
tween the driver's door switch and the 25-way con-
nector in the control module in the driver's seat
(Figs. 21 and 22).
Fig. 21 Driver's Door Switch to 25-Way Connector at the Seat Control Module Continuity
Fig. 22 Control Module and Seat Switch Pin Location
8R - 14 POWER SEATS Ä

(3) Use an ohmmeter to test the wiring between
the door switch and the control module in the driv-
er's seat. The circuits should be disconnected from
their components at each end. Repair the wiring as
required for open circuits, terminal push outs, or bad
crimps. If the circuits are good to the control module
but the function is still missing, replace the control
module.
CONDITION: NO MOVEMENT OF THE SEAT, RELAYS CAN BE HEARD CLICKING WHENTHE SEAT SWITCH IS ACTIVATED.
PROCEDURE
(1) Check for battery voltage and ground at the ap-
propriate pins of the control module 10-way connec-
tor (Fig. 23). If the proper results are not obtained,
replace the control module. If the circuits are correct,
then continue the procedure.
(2) Check for continuity of the motor circuits from
the control module 10-way connector to the left
power seat motor package (Fig. 24). (3) Repair the wiring as required for open circuits,
terminal push outs, or bad crimps. If the circuits are
good but the seat movement direction is still missing,
replace the seat motor package assembly. After re-
placement of the seat motor package, reconnect all wiring connectors and reinstall seat assembly in ve-
hicle. Operate the switches manually to cause maxi-
mum seat movement in all directions. Perform the
memory seat diagnostic self check so the control
module will learn the new soft limits of the assem-
bly.
CONDITION: NO MOVEMENT OF THE MEMORY MIRRORS WHEN THE POWERMIRROR SWITCH IS ACTUATED, MEMORYMIRRORS MOVE DURING RECALL ONLY.
PROCEDURE
(1) Check for battery voltage at pin 1 of the mem-
ory mirror switch 8-way connector in the driver's
door. This battery feed is through a diode package
that is located in the left cowl side area. A grounded
wire on the switch side of the diode would most
likely cause the diode package to open. Solder and
tape the connections if replacement is necessary. The
fuse is in cavity 13 of the fuse block. (2) Check for ground at pin 5 of the memory mir-
ror switch 8-way connector. Repair as needed. (3) Check for continuity of the memory mirror
switch. Refer to the Group 8T, Mirror Switch Test
Procedure and the Continuity.
Fig. 23 Control Module 10-Way Connector Voltage and Ground Test
Fig. 24 Control Module 10-Way Connector to PowerSeat Motor Connector Continuity
Ä POWER SEATS 8R - 15