1993 CHEVROLET PLYMOUTH ACCLAIM key

(5) Using Rotor Installer Set, place the ring part of
the set into the bearing cavity (Fig. 9). Make certain
the outer edge rests firmly on the rotor bearing inner
race. (6) Place the tool set driver into the ring (Fig. 10).
(7) With a hammer, tap the end of the driver while
guiding the rotor to prevent binding. Tap until the
rotor bottoms against the compressor front housing
hub. Listen for a distinct change of sound during the
tapping process. (8) Install external front housing snap ring with
spread type snap ring pliers. (9) Install front plate assembly.
² Check that original clutch shims are in place on
compressor shaft.
² Replace compressor shaft key.
² Align front plate key-way to compressor shaft key.
(10) Using shaft protector, tap front plate to shaft
until it has bottomed to the clutch shims (Fig. 11).
Listen for a distinct change of sound during the tap-
ping process.
Fig. 6 Install Puller Plate
Fig. 7 Loosen Coil Lead Wire
Fig. 8 Snap Ring and Field Coil Removal
Fig. 9 Rotor Installer Set
24 - 40 HEATING AND AIR CONDITIONING Ä

(4) Do not touch the new seal lapping surfaces. Dip
the mating surfaces in clean refrigerant oil before
proceeding. (5) Engage slots of Seal Remover and Installer to
new seal cage and insert seal assembly firmly into
place in the compressor seal cavity (Fig. 9). Twist
tool in opposite direction to disengage tool from seal
cage. Remove tool. (6) Coat seal retainer with clean refrigerant oil.
Use seal seat tool to install (Fig. 10). Press lightly
against seal. (7) Install snap ring. Beveled edge lies outward
from compressor. Flat side lies toward compressor. It
may be necessary to lightly tap the snap ring to se-
curely position it in its groove. (8) Replace clutch spacer shims.
(9) Tap new felt ring into place (Fig. 11).
(10) Align front plate key-way to compressor shaft
key. (11) Using shaft protector, tap front plate to shaft
until it has bottomed to the clutch shims. Listen for
a distinct change of sound during the tapping pro-
cess. (12) Replace shaft hex nut. Tighten the hex nut to
37 N Im (27 ft. lbs.) torque.
(13) Check air gap with feeler gauge (Fig. 12). The
specification is 0.406-0.787 mm (0.016-0.031 inch). If
Fig. 6 Shaft Seal Seat Removal
Fig. 7 Seal Assembly Removal
Fig. 8 Insert Seal Sleeve Protector
Fig. 9 Compressor Shaft Seal Installation
Ä HEATING AND AIR CONDITIONING 24 - 43

Involves the wiring, blend-air door actuator, or the
ATC control head.
² DIAGNOSTIC TROUBLE CODES 3, 16, 17, 18, 19,
and 24 Involves the wiring, mode door actuator, or the ATC
control head.
² DIAGNOSTIC TROUBLE CODE 4
Involves the wiring, blend-air door actuator, mode
door actuator, fresh/recirc. door actuator, or the ATC
control head.
² DIAGNOSTIC TROUBLE CODE 5
Involves the wiring, fresh/recirc. door actuator, or the
ATC control head.
² DIAGNOSTIC TROUBLE CODE 6
Involves the compressor circuit signal wiring, or the
ATC control head.
² DIAGNOSTIC TROUBLE CODE 7
Involves the blower wiring, power module, or the
ATC control head.
² DIAGNOSTIC TROUBLE CODES 8, 21, 22
Requires replacing the ATC control head.
² DIAGNOSTIC TROUBLE CODES 9, and 27
Involves the wiring, sun sensor, or the ATC control
head.
² DIAGNOSTIC TROUBLE CODES 10, and 28
Involves the wiring, water temperature sensor, or the
ATC control head.
² DIAGNOSTIC TROUBLE CODES 11, and 25
Involves the wiring, ambient temperature sensor, or
the ATC control head.
² DIAGNOSTIC TROUBLE CODES 12, and 26
Involves the wiring, in-car temperature
sensor/aspirator, or the ATC control head.
DIAGNOSTIC TROUBLE CODE SERVICE PROCE-
DURES
The control keyboard will not function if pins
7, 9, 17, 19, or 20 of the 21-way wiring connector
are shorted to battery voltage. For electrical pin numbers, refer to the wiring Pin
out charts (Figs. 1, 2, 3, 4, 5, or 6).
DIAGNOSTIC TROUBLE CODE 1ÐOUTPUT FAILURE WITH ALL OUTPUTS LOW
(1) Remove pin #2 from 21-way connector on control
and retest system. If code 01 does not appear, the
control is good. Disconnect 21-way connector from control. With an
ohmmeter, measure the resistance between pin #2 and
pin #12 of 21-way. This should be between 2,600 and
2,800 ohms. If yes, the power module is good. Source of voltage on pin #2 is in the wiring. Repair
and retest system. (2) Remove pin #13 from 21-way connector on con-
trol and retest system. If code 01 does not appear, the
control is good. Locate source of voltage on pin #13.
Repair and retest system. (3) Remove pin #5 from 21-way connector on control
and retest system. If code 01 does not appear, the
control is good. Locate source of voltage on pin #5.
Repair and retest system. (4) Remove pin #6 from 21-way connector on control
and retest system. If code 01 does not appear, the
control is good. Locate source of voltage on pin #6.
Repair and retest system. (5) Remove pin #15 from 21-way connector on con-
trol and retest system. If code 01 does not appear, the
control is good. Locate source of voltage on pin #15.
Repair and retest system.
DIAGNOSTIC TROUBLE CODE 2ÐBLEND AC- TUATOR DRIVE SIGNAL NOT HIGH
If both Diagnostic Trouble Codes 2 and 3 occur
simultaneously, do both procedures. There is
typically only 1 failure. (1) Disconnect terminal #6 on the ATC control 21-
way connector and retest the system. Note that remov-
ing this terminal may generate additional Diagnostic
Trouble Codes. Disregard these at this time. (2) If Diagnostic Trouble Code 2 reappears, replace
control. (3) If code 2 does not reappear, the problem is a
shorted blend door actuator motor or a short to ground
in circuit 33 (pin #6). (4) Remove 21-way connector and check for continu-
ity from pin #6 to chassis ground. There should not be
any continuity. If continuity is there, repair wiring and
retest. (5) Check resistance across pins #6 and #4 of the
21-way for a shorted actuator motor. Resistance should
be between 20 and 50 ohms. If not correct, replace
actuator.
DIAGNOSTIC TROUBLE CODE 3ÐMODE AC- TUATOR DRIVE SIGNAL NOT HIGH
If both Diagnostic Trouble Codes 2 and 3 occur
simultaneously, do both procedures. There is
typically only 1 failure. (1) Disconnect terminal #5 on the ATC control 21-
way connector and retest the system. Removing this
terminal may generate additional Diagnostic Trouble
Codes. Disregard these at this time. (2) If Diagnostic Trouble Code 3 reappears, replace
control. (3) If code 3 does not reappear, the problem is a
shorted mode door actuator motor, or a short to ground
in circuit #35 (pin #5). (4) Remove 21-way and check for continuity from pin
#5 to chassis ground. There should not be any continu-
ity. If continuity is there, repair wiring and retest.
24 - 74 HEATING AND AIR CONDITIONING Ä