1992 MAZDA PROTEGE air condition

T INSTRUMENT CLUSTER
Symptom: Fuel gauge does not operate.
SMUOTX-077 -_d
,
1
OBUOTX-186
W/ TACHO W/O TACHO
7R 7cl
9MUOTX-079
23UOTX-04:
WI TACHO W/O TACHO
7Q 7cl
Step 1
1. Disconnect the connector from the fuel gauge sender unit.
2. Connect the red lead of the SST to the terminal-wire (Y) and
the black lead to a body ground.
3. Set the SST to the resistance values shown in the figure.
4. Turn the ignition switch ON, and verify that the needle indi-
cates the correct values.
Indicates correct Action
Yes Replace fuel gauge sender unit (in fuel tank)
/
No Go
to Step 2
Caution
l Continue the above checks for at least two minutes
each to correctly judge the condition.
l The allowable indication error is twice the width of
the needle.
Step 2
1. Remove the instrument cluster. (Refer to page T-69.)
2. Apply battery voltage to terminal 2L and ground terminal 2E.
3. Connect the red lead of the SST to terminal 1C and the
black lead to a negative battery terminal.
4. Set the SST to the resistance values shown in the figure.
5. Verify that the needle indicates the correct values.
Indicates correct Action
Yes Repair wiring harness
(Instrument cluster - fuel gauge sender unit)
No Replace fuel gauge sender unit
Caution
. Continue the above checks for at least two minutes
each to correctly judge the condition.
l The allowable indication error is twice the width of
the needle. .-/

CRUISE CONTROL SYSTEM T
L 23UOTX-05
Condition Code Numbers
Self-diagnosis of malfunction
The test light will flash if a malfunction is present.
Inspection Procedure
Self-diagnosis of malfunction
1. Locate the cruise control connector.
2. Connect a 1.4W test light between terminals f and d, with
connector attached to control unit.
Note
l There is no wire in terminal d of the connector. Push
the test light through the connector and touch the
corresponding pin on the control unit.
3. Turn the ignition switch to ON.
4. Turn the cruise control on by pressing the MAIN switch. (The
MAIN indicator lamp will come ON.)
5. Press and hold the RESUMElACCEL switch for more than
three second.
6. The test light will illuminate for 3 seconds and go out for
2 seconds.
7. The self-diagnostic system is activated and the test light will
flash if a problem is present.
8. Make note of the condition code number(s).
(Refer to the chart at the bottom of the page).
9. After retrieving the code(s), drive the vehicle at more than
16 km/h (lOmph), or press the MAIN switch to deactivate
self-diagnosis. (The MAIN indicator lamp will go OFF.)
Note
l The cruise control system will not operate when in
the self-diagnosis mode.
Pattern of output signal
(Test light)
ON
OFF ON
GFF
,“r,- ON
OFF Note
23UOTX-05
l
If there is more than one malfunction, the code numbers will be indicated in numerical order.
T-81 Code
No.
01
05 Possible Cause Action
Defective wiring (Actuator-Cruise control
unit, Stoplight switch-Cruise control unit)
Defective actuator
Defective stoplight switch (For cruise)
STOP fuse blown
Defective wiring (Fuse - Cruise control
unit)
Both stoplight switches (for vehicle and
cruise) are ON simultaneously
Defective SET/COAST. or RESUME/ Inspect cruise control switch
ACCEL switch (Refer to page T-21)
Defective cruise control unit Repair harness
Inspect actuator
(Refer to page T-87)
Inspect stoplight switch
(Refer to page T-87)
Replace fuse
Repair harness
Inspect stoplight switches
(Refer to pages T-47 and
T-87)
Go to troubleshooting
(Refer to page T-83)

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

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

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)

TROUBLESHOOTING GUIDE U
‘)
IO
1
Step 4 Measure voltage at refrigerant pressure switch
No.2
Measure the voltage at the following terminal wires of the
refrigerant pressure switch No.2 connector. VB: Battery voltage
Wire
WO)
(‘3 Voltage Action
VB Next check wire (B)
ov Repair wire (B/O)
V0 Repair wire (B)
ov Go to Step 5
Step 5 Measure refrigerant pressure
1. Connect the A/C manifold gauge set.
2. Operate the engine at 2,000 rpm and set the air condition-
er to maximum cooling.
3. Measure the high-pressure side refrigerant pressure.
Refrigerant pressure
Below: 1 ,177 kPa
(12 kg/cm*, 171 psi)
Above: 1 ,177 kPa
(12 kg/cm’. 171 psi) Action
Normal operation
Replace refrigerant pressure switch No.2
u-9

U TROUBLESHOOTING GUIDE
Symptom: Magnetic clutch does not operate. (Condenser fan operates normally.)
03uoux-015
_-I
I 23UOUX-011
Step 1 Measure voltage at compressor connector
1. Run the engine at idle.
2. Turn A/C and the blower switches ON.
3. Measure the voltage at the following terminal wire of the
compressor connector.
VB: Battery voltage
Wire
P/W Voltage
V0
ov Action
Go to Step 2
Go to Step 5
Step 2 Measure voltage at magnetic clutch connector
Measure the voltage at the following terminal wire of the mag-
netic clutch connector. Ve: Battery voltage
--
Wire Voltage Action
(B)
VB Go to Step 3
ov
t Go to Step 4
Step 3 Check magnetic clutch
1, Disconnect the magnetic clutch connector.
2. Check for continuity between the magnetic clutch and a
body ground.
Continuity
Yes
No Action
Adjust magnetic clutch clearance or
check for compressor internal trouble
Check ground wire
If ground wire OK, replace magnetic
clutch
Step 4 Check thermal protector
1. Turn the air conditioner OFF for about 10 minutes.
2. After 10 minutes, check for continuity of the thermal pro-
tector.
Continuity Action
Yes Normal operation
No Replace thermal protector .._