1992 MAZDA PROTEGE clutch

CRUISE CONTROL SYSTEM T
OSUOTX-14
PEDAL HEIGHT
03UOTX-I 4’
OSUOTX-18
Actuator
Measure the actuator solenoid resistance using an ohmmeter.
Check terminals
c-a
c-b Resistance
Approx. 22 to 553
Clutch switch, Brake switch
When servicing these switches, adjust them so that the cor-
responding pedal height is as specified.
Pedal height (With carpet)
Clutch: 196-204mm (7.72--6.03 in)
Brake : 193-196mm (7.60-7.72 in)
Stoplight switch (For cruise)
Check that there is continuity between (P) and (V) wires when
the brake pedal is released.
T-87

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
Symptom
Blower motor does not operate
Condenser fan does not opera!e
(Magnetic clutch operates normally)
--
Magnetic clutch does not operate
(Condenser fan operates normally)
Reference page
U- 6
U- 8
--
u-10
Condenser fan and magnetic clutch do not operate
lnsufficlent cooling
No cooling
Intermittent cooling u-12
u-14
03uoux-004
ELECTRICAL TROUBLESHOOTING TOOLS
Jumper Wire
The
jumper wire is used for testing by short-circuiting switch
terminals
and to verify the condition of ground connections.
Caution
l Do not connect the jumper wire between a power
source and a body ground. This may cause burn-
ing or other damage to harnesses and electronic
components.
Voltmeter
The DC voltmeter is used for measurement of circuit voltage.
A voltmeter with a ranqe of 15V or more must be used. It is
q
used by connecting th‘k positive (+) probe (red lead) to the
point where voltage is to be measured and connecting the
negative (-) probe (black lead) to a body ground.
Ohmmeter
The ohmmeter is used to measure the resistance between two
points in a circuit, to check for continuity, and to diagnose short
circuits.
Caution
l Never connect the ohmmeter to any circuit to which
voltage is applied. Doing so may burn or otherwise
damage the ohmmeter.
SMUOUX 010
U-5

TROUBLESHOOTING GUIDE
Symptom: Condenser fan does not operate. (Magnetic clutch operates normally.)
03uoux-009
I 23UOlJX-007
WITH
MTX AND
fi==Tl (B/O)...BP ENGINE
-’ WITH ATX
Step 1 Check condenser fan operation
1. Disconnect the condenser fan connector.
2. Apply battery voltage to terminal a and ground terminal b
and verify that the condenser fan operates.
3. If the condenser fan does not operate, replace it.
4. If the condenser fan operates, go to Step 2.
Step 2 Measure voltage at condenser fan
1. Disconnect the condenser fan connector.
2. Run the engine at idle.
3. Turn the A/C and blower switches ON.
4. Measure the voltage at the following terminal wire of the con-
denser fan connector.
VB: Battery voltage
Wire
WV Voltage
VB
ov Action -
Replace condenser fan
Go to Step 2
Step 3 Measure voltage at condenser fan relay
Measure the voltage at the following terminal wires of the con-
denser fan relay connector.
(BP engine with ATX)
VB: Battery voltage
(BP engine with MTX and 66 engine)
Ve: Battery voltage
Wire Voltage Action
o-/W) VI3 Repair wire (L/W)
ov Next check wire (L/Y)
VY) VB Repair wire (L/Y)
ov Next check wire (B/L)
VW VB Repair wire (B/L)
ov Next check wire (B)
03 Va Repair wire (B)
ov Replace condenser fan relay ,
U-8

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 .._

TROUBLESHOOTING GUIDE
Symptom: Condenser fan and magnetic clutch do not operate.
03uoux-023
r
3EAR WIPER 10A OA
L
03uoux-02.
I
1 Step 1 Check fuses
1. Check the following fuses.
Fuse Amperage Location
AD FAN 20A In main fuse box
REAR WIPER 10A In fuse box
2. If the fuse is burned, check for a short-circuit in the wiring
harness before replacing it.
3. If the fuses are OK, go to Step 2.
I
23uoux-011
Step 2 Measure voltage at A/C relay connector
1. Run the engine at idle.
2. Turn the A/C and blower switches ON.
3. Measure the voltage at the following terminal wires of the
A/C relay connector. VEX Battery voltage
,
Wire
0-Q
W) Voltage Action
VB Next check wire (L/Y)
ov Repair wire (L/G)
V0 Next check wire (B/L)
ov
VB
ov
VB
ov Repair wire (L/Y)
Repair wire (B/L)
Next check wire (LIB)
Go to Step 3
Replace A/C relay
Step 3 Measure voltage at A/C switch
Measure the voltage at the following terminal wires of the A/C
switch connectors.
VB: Battery voltage
Step 4 Measure voltage at thermoswitch
Measure the voltage at the terminal wires of the thermoswitch
connector.
VB: Battery voltage
Wire
(G/R)
WB)
Voltage
VB
ov
VB
OV
Action
Repair wire (G/R)
Next check wire (G/B)
Go to Step 5
Check ECU ooeration
1 -. [ Refer to Secti6n F
u-12