MAZDA 323 1989 Factory Repair Manual

AUDIO
Noise
1 YES
I
Verify that mounting screws ar Tighten screws
1 YES
Is there still noise when anten
I Replace antenna YES
Is wiring in good condition? Repair wiring
I YES
Verify proper grounding Repair ground
I I YES
Check for outside noise (Refer to page T-96)
23UOTX-066 Scan or turning does not stop
Install properly
inspect antenna (Refer to p
, YES
Replace audio assembly
23UOTX-069
T-95

AUDIO
CAUSES OF NOISE
When the radio receives a signal from a station, there may be some noise interference. The cause could be
1. Defective audio system.
2. The vehicle itself inducts noise (called outside noise).
3. Noise from other cars or neon signs, for example, ambience noise.
Since ambience noise is a temporary occurrence, this section does not deal with it. For noise problems,
first, the cause of the noise must be determined through the troubleshooting guide. Once it has been deter-
mined, refer to the suppression chart to find the proper procedure for eliminating the noise.
FM STATION
93u15x-07 1 03UOTX-187
FM multipath
FM waves can cause a problem called multipath receiving.
This happens when the radio picks up a direct wave and
reflected wave at the same time. This results in a “Dead Spot”
or distorted sound.
Troubleshooting
I I
+
There is still noise
I
Defective audio system
+
Noise eliminated
V
Vehicle itself inducts noise
I
23UOTX-070
T-96

AUDIO T
Noise Suppression Chart
Cause
‘uel pump noise Remedy Move speaker wiring away from fuel pump wire.
REAR HARNESS FUEL
PUMP
Wotor noise
Wiper, washer, power
window, for example) 1. Check grounding.
2. Install condensers to motor circuit.
Turn signal noise Connect condenser (0.5 pF) to power line of filter unit. Note
CONDENSER
4lternator noise
l Condenser should be placed near flasher unit.
Connect condenser (0.5 pF) near alternator.
TO RADIO
CONDENSER
97UOTX-1
T-97

T AUDIO
AUDIO COMPONENT
Removal / Installation
1. Remove in the order shown in the figure.
2. install in the reverse order of removal.
OBUOTX-163
1 .Center panel
T-98
03UOTX-1E
2. Audio component
DOOR SPEAKER
Removal / Installation
1, Remove the door trim. (Refer to Section S.)
2. Remove the door screen.
3. Remove the door speaker.
-’

AUDIO T
97UOTX-If
13UOTX-06
/-cl/ /
03UOTX-18:
03UOTX-16 OWOTX-189
6
Inspection
1. Check for resistance with an ohmmeter.
Note
l Set the ohmmeter to xl0 range.
l Redstance: approximately 4h2
2. Confirm that clicking comes from the speaker when touch-
ing the connectors. If not, replace speaker.
REAR SPEAKER
Removal / Installation
(PROTEGe)
1. Remove the fasteners and the rear package trim.
2. Remove the screws and the rear speaker.
(Hatchback)
1. Remove the cover.
2. Remove the screw and the rear speaker.
Inspection
1. Check for resistance with an ohmmeter.
Note
l Set the ohmmeter to xl0 range.
l Resistance: approximately 43
2. Confirm that a clicking comes from the speaker when touch-
ing the connectors. If not, replace the speaker.
ANTENNA FEEDER
Removal
1. Remove the instrument panel. (Refer to Section S.)
2. Remove the front side trim.
T-99

T AUDIO
OWOTX-167
// 03UOTX-161
OBUOTX-
ANTENNA FEEDER
PLUG
OHMMETER
03UOTX-
3. Remove the antenna feeder from the clip.
4. Remove the screws and antenna assembly.
Installation
1. Extend the antenna.
2. Insert the antenna feeder and the drain pipe in the hole of
the roof.
3. Install in the order shown in the figure.
Inspection
1. Check the antenna with an ohmmeter.
2. If the needle does not indicate infinite, replace the antenna.
T-l 00

U
HEATER AND
AIR CONDITIONER SYSTEMS
INDEX ...................................................... u- 2
HEATER ................................................
AIR CONDITIONER ................................. ;r ;
TROUBLESHOOTING GUIDE.. .................... U- 4
CIRCUIT DIAGRAM ................................. u- 4
ELECTRICAL TROUBLESHOOTING TOOLS. U- 5
HEATER ................................................... u-20
STRUCTURAL VIEW ................................ u-20
HEATER UNIT ........................................ u-21
BLOWER UNIT ....................................... U-23
HEATER CONTROL UNIT.. ....................... U-26
AIR CONDITIONER .................................... u-30
STRUCTURAL VIEW ................................ u-30
REFRIGERANT SYSTEM ........................... u-31
COOLING UNIT ...................................... U-38
COMPRESSOR ....................................... u-41
MAGNETIC CLUTCH ............................... u-51
RECEIVER/DRIER .................................... U-52
CONDENSER ......................................... u-53
REFRIGERANT LINES .............................. u-54
REFRIGERANT PRESSURE SWITCH No.1.. . U-55
REFRIGERANT PRESSURE SWITCH No.2.. . U-55
A/C RELAY ............................................ U-56
CONDENSER FAN RELAY.. ......................
CONDENSER FAN .................................. z-f;
-
A/C SWITCH .......................................... u-57
23UOUX-001

U INDEX
INDEX
HEATER
1. Heater unit
Removal I Installation . . . . . . . page U-21
Disassembly / Assembly.. page U-22
2. Blower unit
Removal / Installation ,,.....,.....,.... page U-23
Disassembly / Assembly.. . page U-24
Blower motor (in blower unit)
Inspection. ,...._. . . . . . . . page U-25
Resistor assembly (in blower unit)
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page U-25
K!JOUX 00
3, Heater control unit
Removal / Installation .
Disassembly / Assembly
Blower switch
Inspection .., . ,, ,.
Ret-Fresh wire
Adjustment
Mode wire page U-26
page U-27
page U-28
page U-28
Adjustment ,.,...,...,.,........ . . page U--28
Mix wire
Adjustment .~.. . . I. page U-28
u-2

INDEX U
AIR CONDITIONER
-1 c.Juuux-002
1 . Compressor 6. Refrigerant pressure switch No.2
Removal / Installation.. ................ page U-41 Inspection..
................................. page U-55
Disassembly I Assembly .............
page U-43 7. Condenser fan
Adjustment ................................. page U-46 Removal / Installation
.................. page U-57
2. Magnetic clutch Inspection ...................................
page U-57
Disassembly I Assembly .............
page U-51 8. Cooling unit
Inspection.. .................................
page U-51 Removal I Installation ..................
page U-38
Adjustment .................................
page U-51 Disassembly / Assembly..
........... page U-39
3. Condenser Replacement .............................. page U-39
Removal I Installation.. ................
page U-53 On-vehicle inspection..
............... page U-40
Inspection ...................................
page U-53 Inspection..
................................. page U-40
4 . Receiver/Drier
9. A/C relay
Removal I Installation.. ................
page U-52 Inspection ................................... page U-56
5. Refrigerant pressure switch No. 1
10. Condenser fan relay
Inspection.. .................................
page U-55 Inspection ................................... page U-56
u-3

C
b l HEATER 6 AIR CONDITIONER 1 G
MAIN
I3 Fl
AD FAN
JB-06
4
B/R (F)
1,
1 I
t
G-07
REAR WIPER
IOA
-L/G (F) _fcoJI)
a-07
63
ENGINE
CONTROL UNIT
(SECTION 6-1~. 2bl A/C SWITCH 6 BLOWER SWITCH ILLUMINATION
LAMPS’REFER TO SECTION I-4
RESISTOR ASSEMBLY L/B
-1
r
BjG L)B
(AC9 (AC)
4NT
A/C SWITCH -L/B
4)
6 33
;~~l-bJG FAN
(SECTION B-3.
i-01 CONDENSER FAN (AC) -03 DIODE (AC) G-04 REFRIGERANT G-05 REFRIGERANT G-06 MAGNETIC CLUTCH (AC) G-07 IE) - (AC) CONNECTOR
PRESSURE SWITCH NO.2 (AC) PRESSURE SWITCH NO. 1 (AC)
I I I I
s-10 A/C SWITCH(ACl G-12 BLOWER MOTOR (F) G-13 RESISTOR ASSEMBLY (II
I
I j-14 BLOWER SWITCH (I)