1987 MAZDA 626 ad blue

4C CONTROL SYSTEM
4. Make sure that the throttle valve is fully closed.
5. Turn the throttle sensor so that the BLUE wire volt-
age indicates within the specified closed range.
6. Tighten the throttle sensor mounting screw.
7. Recheck that the BLUE wire voltage is within the
specified range.
76G04C-195
8. Turn the ignition switch OFF.
9. Disconnect the SST and reconnect the throttle sen-
sor connector.
10. Disconnect the negative battery terminal and de-
press the brake pedal for 5 seconds to eliminate
the from the malfunction memory from the control
unit.
76G04C-196
76G04C-198
4C-106
IDLE SWITCH
Inspection
1. Disconnect the idle switch connector.
2. Check continuity between the switch and a ground.
Throttle valve condition Continuity
Fully closed Yes
Open No
3. If not correct, check condition of the wiring harness
of the idle switch. Replace the idle switch and throt-
tle body as an assembly, if necessary.
WATER THERMO SWITCH
Inspection
1. Remove the switch from the radiator.
2. Place the switch in water with a thermometer and
heat the water gradually.
3. Check for continuity of the switch with an
ohmmeter.
Coolant temp. Continuity
More than approx. 17°C (63°F) Yes
Less than approx. 10°C (63°F) No
4. If not correct, replace the water thermo switch.

4D SUPERCHARGING SYSTEM (RF-CX)
SUPERCHARGING SYSTEM (RF-CX)
TROUBLESHOOTING GUIDE

Engine
hard
starting

Poor

acceleration

Excessive

blue
smoke

Excessive

black
smoke

Excessive

compressed
air
temperature
(Buzzser
sounds)

Excessive

noise
Possible Cause Remedy (reference page)
*
*
Comprex supercharger Rotor stuck Casing damaged Rotor bearing damaged
Replace (4D—14)
* * * Drive system
of
Comprex supercharger Drive belt loose
or
worn Repair
or

replace
(4D-12) * Idler pulley damaged
Repair
or

replace
(4D-12) * Pulley bolt loose
or
worn
Repair
or

replace
(4D-12)
* Wastegate
Valve
not
open Clean
or
repace (4D-12) ik * Valve
not
closed
Clean
or
repace (4D-12)
* * Starting valve
Valve
not
open Repair
or
replace (4D-15)
* * Valve
not
closed
Repair
or
replace (4D-15) * Bypass valve
not
open
Repair
or
replace (4D-15)
* * Bypass valve
not
closed
Repair
or
replace (4D-15)
* Intercooler dirty Clean
or
replace (4D-16)
* * * * Intake
air
system Fresh
air
side clogged (Air cleaner
ele-
ment,
etc.)

Repair
or
replace * Compressed
air
side clogged (Intercool-
er,
etc.)
Repair
or
replace
* Fresh
air
side leaks
Repair
or
replace
* * * Compressed
air
side leaks
Repair
or
replace
* Exhaust system
Exhaust
gas
breaked Repair
* * * * * Exhaust pipe clogged
Repair
* Silencer damaged
(in
fender,
in air
clean-er,
in air
funnel, Comprex insulator) Repair
or
replace
* Bolt
and nut
loosend Repair
76G04D-022
4D—10

DISTRIBUTOR 5
7BU05X-075
86U05X-048
76G05X-007
DISTRIBUTOR
SPARK TEST
1. Disconnect the distributor lead from the distributor.
2. Hold it with insulated pliers approx. 5—10 mm
(0.20—0.39 in) from a ground.
3. Crank the engine and check that a strong blue
spark is visible.
4. If there is no spark, the ignition coil or pick-up coil
may be bad.
Check once again after replacing the ignition coil
or pick-up coil.
IGNITION TIMING
1. Warm up the engine to the normal operating tem-
perature.
2. Turn all electric loads OFF.
3. Connect a tachometer and timing light to the
engine.
4. Connect a jumper wire between the test connec-
tor and ground. (Only for FE DOHC)
5. Check the idle speed. Set to the specified speed
if necessary.
Idle speed: 750 ± 50 rpm (FE DOHC)
800 t58 rpm (F6, F8 FE—MTX)
900 i58 rpm (F8, FE—ATX
in "P" range)
950 -5o rmp (F6—ATX
in "P" range)
6. Check that the timing mark (Yellow) on the crank-
shaft pulley and the mark on the timing belt cover
are aligned.
Ignition timing:
FE DOHC: 12 ± 1° BTDC
(Test connector grounded)
Others: 6 ± 1°
(Vacuum hoses disconnected and
plugged)
76G05X-008
5—11

5 IGNITER
(FE
DOHC)
76G05X-018
IGNITER
INSPECTION
1. Disconnect the center high tension lead from the
distributor cap.
2. Hold it with insulated pliers approx. 5—10 mm
(0.20—0.39 in) from a ground.
3. Turn th ignition switch ON.
4. Remove the rubber seal from the igniter connector.
5. Apply battery voltage to terminal A (LR) with a jum-
per wire.
6. Check that a strong blue spark is visible when the
wire is disconnected.
76G05X-019
If no spark is seen, connect a voltmeter between
terminal B (B) and terminal C (YL), and check for
battery voltage.
76G-05X-020
8. Repeat steps 5 and check
that
the voltage changes
to 2—3V.
9.
If
the voltage is not as specified, replace the igniter.
10.
If
the voltage is as specified, check the ignition coil
and high tension lead.
76G05X-021
5-20

7B TROUBLESHOOTING (G4A-EL)
Retrieval Procedure
1. Locate the service connector.
86U07B-019
76G07B-214

11 IDLFC
5» O | || KICK DOWNS* _ If, DEPRESS
|[BRAKE UORRSW
MNMWE STF *
° M CRUISE CONTROL SW
CDS®> *• PI ^ SPEED DROPS
Gf Aft
•
OO ou
I I
w

6019 HI NOW* XIKI
CO , LTQ
MUX
IN
JAP"
76G07B-016
2. Ground the ground connector of the EC-AT
Tester.
3. Connect the 6-pin connector of the EC-AT Tester
to the service connector.
Note
The service connector is blue-colored con-
nector.
4. Ground the 1 pin service connector.
Note
The service connector is blue-colored con-
nector.
5. Turn the ignition switch ON.
6. Check that "88" flashes on the digital display and
the buzzer sounds for three seconds after turning
the ignition switch ON.
7. If "88" does not flash, check the service connec-
tor wiring.
8. If "88" flashes and the buzzer sounds continuously
for more than 20 seconds, check wiring to 2M ter-
minal of the EC-AT control unit for short-circuit then
replace the EC-AT control unit and repeat steps
3 and 4.
9. Note the code numbers and check for the causes
by referring to the Inspection Procedure shown on
pages 7B—19 to 7B—21, repair as necessary.
Note
After repairs are made, recheck for code num-
bers by performing the "After-repair
procedure."
7B—18

7B INSPECTION AND REPAIR
Inspection
Check the following and replace any faulty parts.
1. Damaged or worn valves
2. Damaged oil passage
3. Cracked or damaged valve body
4. Operation of each valve
5. Weakened spring
Spring

Spring name Outer dia.
mm
(in) Free length
mm
(in) Wire dia.
mm (in)
Spring color
1-2 accumulator small spring 11.0 (0.433) 88.1 (3.348) 1.4 (0.055) Gray
1-2 accumulator large spring 16.0 (0.630) 78.0 (3.071) 2.0 (0.079) Blue
Bypass, Servo control spring 5.0 (0.197) 33.4 (1.315) 0.55 (0.022) Maroon
2-3 timing spring 8.3 (0.327) 26.5 (1.043) 0.8 (0.031)
—

N-R accumulator rear spring 11.1 (0.437) 62.0 (2.441) 1.2 (0.047) Light green
N-D accumulator front spring 9.8 (0.386) 52.9 (2.083) 1.0 (0.039) Brown
Coasting bypass spring 5.8 (0.228) 37.7 (1.484) 0.6 (0.024) Dark blue
3-2 timing spring 8.2 (0.323) 28.6 (1.126) 0.8 (0.031) Red
3-2 capacity spring 5.4 (0.213) 30.6 (1.205) 0.5 (0.020) White
Throttle relief ball spring 6.6 (0.260) 21.6 (0.850) 0.8 (0.031)
—
76G07B-151
Assembly
1. Install the 3-2 capacity valve, 3-2 capacity spring,
and stopper plug; then install the stopper pin.
2. Install the 3-2 timing valve, the 3-2 timing spring,
and retainer.
86U07B-280
3. Install the coasting bypass plug, coasting bypass
valve and coasting bypass spring.
4. Apply ATF to the O-rings, and install them to the
piston; then insert the N-R accumulator rear spring
and N-R accumulator piston.
5. Apply ATF to the O-rings, and install them to the
piston; then insert the N-D accumulator piston and
N-D accumulator front spring.
76G07B-152
7B—142

INSPECTION AND REPAIR 7B
Inspection
Check the following and replace any faulty parts.
1. Damaged or worn valves
2. Damaged oil passage
3. Cracked or damaged valve body
4. Operation of each valve
5. Weakened spring
Spring

Spring name Outer dia.
mm
(in) Free length
mm (in)
Wire dia.
mm
(in) Spring color
1-2 accumulator small spring F8 engine 9.9 (0.400) 84.7 (3.335) 1.2 (0.047) Red
1-2 accumulator large spring
FE engine 13.0 (0.512) 73.2 (2.881) 1.8 (0.071) Pink 1-2 accumulator large spring F8 engine 16.0 (0.630) 84.7 (3.335) 2.0 (0.079) White
Bypass spring 5.0 (0.197) 25.1 (0.988) 0.7 (0.028) Yellow
Servo control spring 4.9 (0.193) 27.1 (1.067) 0.5 (0.020) Light blue
2-3 timing spring 8.3 (0.327) 26.5 (1.043) 0.8 (0.031)
—

N-R accumulator rear spring 11.1 (0.437) 68.2 (2.685) 1.0 (0.039) Blue
N-D accumulator front spring 9.8 (0.386) 60.9 (2.398) 1.1 (0.043) Yellow
Low reducing spring 8.7 (0.343) 38.3 (1.508) 0.9 (0.035) Black
OD release spring 6.0 (0.236) 32.6 (1.283) 0.6 (0.024) Orange
Coasting bypass spring 5.8 (0.228) 31.3 (1.232) 0.6 (0.024) Yellow
3-2 timing spring 8.2 (0.323) 28.55 (1.124) 0.8 (0.031) Maroon
3-2 capacity spring 5.55 (0.219) 30.5 (1.201) 0.55 (0.022) Light green
Throttle relief ball spring 6.6 (0.260) 20.3 (0.799) 0.8 (0.031) Light green

76G07B-165
Assembly
1. Install the 3-2 capacity valve, 3-2 capacity spring,
stopper plug, and stopper pin.
2. Install the 3-2 timing valve, 3-2 timing spring, and
retainer.
83U07B-287
3. Install the coasting bypass plug, coasting bypass
valve, and coasting bypass spring.
4. Apply ATF to the O-rings, and install them onto the
piston; then insert the N-R accumulator rear spring,
and N-R accumulator piston.
5. Apply ATF to the O-rings, and install them onto the
piston; then insert the N-D accumulator piston, and
N-D accumulator front spring.
83U07B-288
7B—161

INSPECTION AND REPAIR 7B
Inspection
Check the following and replace any faulty parts.
1. Damaged or worn valves
2. Damaged oil passage
3. Cracked or damaged valve body
4. Operation of each valve
5. Weakened spring
Spring

Spring name Outer dia.
mm (in)
Free length
mm
(in)
30.7 (1.209)
46
2
(1 819)
52
3
(2.059)
Wire dia.
mm (in)
Spring color
Blue
Yellow
Red"
Pressure regulator spring 9.5 (0.374)
Free length
mm
(in)
30.7 (1.209)
46
2
(1 819)
52
3
(2.059)
0.7 (0 028)
0
8
(0.031)
1.0 (0.039)
0.8 (0.031)
Spring color
Blue
Yellow
Red"
Lock-up control spring 7,3 (0 287)
Free length
mm
(in)
30.7 (1.209)
46
2
(1 819)
52
3
(2.059)
0.7 (0 028)
0
8
(0.031)
1.0 (0.039)
0.8 (0.031)
Spring color
Blue
Yellow
Red"
Lock-up support spring 7.0 (0.276)
Free length
mm
(in)
30.7 (1.209)
46
2
(1 819)
52
3
(2.059)
0.7 (0 028)
0
8
(0.031)
1.0 (0.039)
0.8 (0.031)
Spring color
Blue
Yellow
Red" OD lock-up spring 7.1 (0.280) 66.5 (2.618)
0.7 (0 028)
0
8
(0.031)
1.0 (0.039)
0.8 (0.031)
Spring color
Blue
Yellow
Red"

76G07B-166
Assembly
1. Install the lock-up support spring, lock-up support
valve, stopper plug, and stopper pin.
Note
Install the stopper plug large end first.
83U07B-305
2. Install the pressure regulator valve, pressure regu-
lator spring, pressure regulator spring seat, pres-
sure regulator plug, pressure regulator plug sleeve,
pressure regulator backup plug, stopper plug, and
stopper pin.
Note
Install the stopper plug large end first.
83U07B-306
7B—169