1992 MAZDA PROTEGE engine

T
I WARNING SYSTEM
Washer fluid warning lamp
1. Disconnect the connector from the washer fluid level sensor.
2. Start the engine and with a jumper wire to connect the con-
nector terminal “a” (LGIW) to a body ground.
3. Check that the washer fluid warning lamp illuminates.
If it does not and the bulb is not burnt out, replace the fluid
level sensor or repair the wiring harness.
13UOTX-08
_-
1 /
J TERMINAL -
13UOTX-08
13UOTX-08
Seat belt warning lamp
1, Remove the CPU.
2. Connect the connector J terminal (joint box side) to a body
ground.
3. Turn ignition switch to ON and confirm that BELT warning
lamp illuminates for about 6 seconds.
4. If there is no illumination, check the fuse, warning readout
and wiring harness.
Check bulb, CPU and wiring harness and switch, repair or
replace as necessary.
Malfunction indicator lamp
1, Connect the “Y/B” wire to a body ground.
2. Start the engine and check that the warning lamp illuminates.
3. If there is no illumination, check the meter fuse, bulb, and
wiring harness between the instrument cluster and the EGI
control unit.
T-62

T INSTRUMENT CLUSTER
Symptom: Tachometer does not operate.
9MUOTX.069
TEST TACHOMETER
23UOTX-040
2E 2G SMUOTX-01
Step 1
1. Remove the instrument cluster. (Refer to page T-69.)
2. Connect a test tachometer between terminals 2E and 2G
of the harness side connector.
Step 2
1. Start the engine.
2. Check that the test tachometer indicates engine speed.
Indicates rpm
Yes
No Action
Replace tachometer
Repair wiring harness
(Instrument cluster - Igniter)
T-66

INSTRUMENT CLUSTER T
(For Canada)
(For USA)
11
OSUOTX-114
Standard Indication
(rpm)
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000 Allowable range
@pm)
880-l ,060
1,970-2,150
3,000-3,180
4,000-4,240
5,000-5,300
6,000-6,360
7.000-7.420
8:600-8:480
03UOTX-11 5
I 23UOTX-044 WI TACHO WIO MACHO
32.50
ssn
9MUOTX-087
Inspection
Speedometer
1. Using a speedometer tester, check the speedometer for ai-
lowable indication error, and check the operation of the
odometer. Replace if necessary.
2. Check the speedometer for fluctuation and/or abnormal
noise.
Caution
l If significant fluctuation occurs or the speedome-
ter does not move at all, remove the speedometer
cable. If it is normal, replace the speedometer as-
sembly.
l Tire wear and improper inflation will Increase
speedometer error.
Tachometer
1. Connect a test tachometer to the engine, and start the
engine.
2. Check the tachometer for allowable indication error. Replace
if necessary.
Caution
l When removing or installing the tachometer, do not
drop it or subject it to sharp shocks.
Fuel gauge
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.
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.
T-71

CRUISE CONTROL SYSTEM T
Cont’d
Place vehicle on the chassis roller and start the engine
and drive the vehicle at a speed of 50 km/h (31 mph)
Check voltage at (a, b, c, o) terminal of cruise control
unit Va: Battery voltage
Terminal Condition Voltage
MAIN switch ON
a Approx. 9V
SET switch
ON Approx. 0-12V
b MAIN switch ON Approx. 9V
SET switch ON Approx. 0-12V
MAIN switch ON
C Approx. 9V
SET switch ON
Approx. 1V
0 MAIN switch
Approx. 9V
SET switch Va
OBUOTX
Defective actuator (Refer to page T-88) I
Defective actuator cable or cruise control unit
23UOTX-059
CRUISE CONTROL UNIT
Removal / Installation
1 .Remove the blower unit. (Refer to Section U.)
2. Remove the bolts and the cruise control unit.
T-85

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
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

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 .._