1987 MAZDA 626 engine overheat
[x] Cancel search: engine overheatPage 469 of 1865
TROUBLESHOOTING GUIDE 4B
TROUBLESHOOTING GUIDE
This troubleshooting guide shows the malfunction numbers and the symptoms of various failures.
Perform troubleshooting as described below.
Possible cause
Symptom
Input sensors and switches
o>
C
0
Jh c 01
4B-14
a> 4)
E
o
4B-1S
o in c « m o E k_ 0) c.
0 <0 £
4B-16
o CO c a> 0) o E
a>
.x
co
4B-17
o 10 c a) co
4B-18
o in c a> (0
o> o> a>
a) £ a VI o E
4B-19
0 <0 c a> 0) c a> 01
S? o
4B-20
E a> in (0
o 10 A •o 0) 0> u.
4B-21
Output solenoid valves
o «
3 O) 0)
0) 0) 01
0> > 10 >
•o o c V o tt)
4B-22
0)
OI
0> > CO >
TJ
O c 0> o CO
4B-23
oc O u
o> > 75 >
•o o c a> o 05
4B-23
0 a. 3 1
2
0) > (0 >
"D O
o 0> in in a a >. £
4B-23
ffl a 3 • a>
2
a> > 10 >
"O o c a> o
CO Q. >. JO
4B-24
Fault Indicated by SST
Code No. 01 08 09 10 12 14 15 17 25 26 28 34 35
Hard start or won't start
(Cranks OK)
Engine stalls
Rough
idle
While warming up
After warming up
While warming up
After warming up
High idle speed after
warming up
TROUBLESHOOTING PROCEDURE
Note
Step 1 under symptom is to quickly determine what system or unit may be at fault by use of the SST. (Self-Diagnosis Checker 49 H018 9A1)
1st:
Check input sensors and output solenoid valves with the
SST.
(Refer
to
page 4B—10.)
2nd:
Check other switches with the
SST.
(Refer
to
page 4B—26.)
3rd:
Check the following items:
11
Poor acceleration, hesita-
tion or lack of power
Runs rough on deceleration
Afterburn in exhaust system
Poor fuel consumption
Engine stalls or rough after hot starting
Electrical system
1) Battery condition
2) Fuses
Fuel system
1) Fuel level 2) Fuel leakage
3) Fuel filter 4) Idle speed
Engine
1) Compression 2) Overheating
Ignition system
1) Ignition spark 2) Ignition timing
Intake air system
1)
Air
cleaner element 2) Vacuum
or air
leakage 3) Vacuum hose routing
4) Accelerator cable
Others
1) Clutch slippage 2) Brake dragging
Fails emission test 4th:
Check Fuel and Emission Control Systems. (Refer
to
page 4B—8.)
76G04B-003
4B—7
Page 570 of 1865
TROUBLESHOOTING GUIDE 4C
TROUBLESHOOTING GUIDE
This troubleshooting guide shows the malfunction numbers and the symptoms of various failures.
Perform troubleshooting as described below.
Input sensors and switches
Possible cause
Page
Symptom and No. CO
T O
a c OI '35
O
I o Tt
o in
a> in
8 c
o
o (A C 0) in
S o
I o
c $
o E
00 T-I O
T o I-ij
o in c at at o E « £
2 a
o>
o
e o •C H
I O
o at e 0)
o CM I o
E a> «-» in >• in a o (0 A •o a> d>
CM I o
Output solenoid valve
o> > <0 >
2
—.
§8 £ c
O O
(0
O
CVI I o
c 0 u « 01 w 3 a
o z «
> 73 >
"O o c a> o (/)
CM CM
o
O o 0) o>
Q. CM
V >
CB >
•o o c 4) o CO
CM CM
O
oc (9 UJ, g
n >
•o o c a> o <0
CO CM
O
o o •o w « a in «
2
s
5 •o o c »
o CO
CO CM
o
n
£
o in c a* (A c a> o>
o
CM
O
w q) t « s > c w QJ O)
"8 g> IS n « £
a> >
a >
T3 O C ai o CO
TT CM
o
Fault Indicated by SST
Code No. 02 03 05 *i 08 09 11 12 *2 15 • 2 17 *2 25 26 *2 27 *2 28 • 2 34 36 • 2 41
Hard start or won't start
(Cranks OK)
Engine stalls
Rough
Idle
During warm up
After warm up
During warm up
After warm up
High idle speed after warm up
Poor acceleration, hesita-tion or lack of power
TROUBLESHOOTING PROCEDURE
Note
Code No. Is to quickly determine which system or unit may be at fault by use of the SST. (Self-Diagnosis Checker 49 H018 9A1 or Digital Code Checker 49 G018 9A0 with Adaptor harness 49 9200 180)
1st: Check input sensors and output solenoid valves with the SST. (Refer to
page
AC—11.)
2nd: Check other switches with the SST. (Refer to page AC—25.)
3rd: Check the following items:
Electrical system
1) Battery condition 2) Fuses
Runs rough on deceleration
Afterburn in exhaust
system
9
10
Poor fuel consumption
Engine stalls or runs
rough after hot starting
11
12
Knocking
Fuel system
1) Fuel level
2) Fuel leakage 3) Fuel filter 4) Idle speed (with test connec-tor grounded)
Engine
1) Compression 2) Overheating
Ignition system 1) Ignition spark
2) Ignition timing (with test connec-tor grounded)
Intake air system 1) Air cleaner element 2) Vacuum or air leakage 3) Vacuum hose routing 4) Accelerator cable
Others 1) Clutch slippage
2) Brake dragging
Fails emission test 4th: Check Fuel and Emission Control Systems. (Refer to page 4C—10.)
*1..
*2„
.Leaded fuel
.Unleaded fuel
76G04C-009
4C—9
Page 880 of 1865
7B TROUBLESHOOTING (G4A-EL)
ON VEHICLE-
-f-
—OFF VEHICLE
\ Inspection point
and
\ reference page
Condition
•
Electronic control system Prelim-
inary
Hydraulic
control
system
Power train \ Inspection point
and
\ reference page
Condition
•
7B-66
m CO I m r--
7B-63
i
cn to I m
Section
4B
|
Section
4B
|
ID to i m
CO CO 1 CD
7B-68
|
en CO 1 IX)
to 1 00 r-.
cn CD 1 CO
7B-69
|
1 CD r--
cn s-1 m
Section
4B
r*-cn
S-1 CD h-
"=1-
rJ CO
7 CD r-
(XI o
1 m
cn CM 1 CD
7B-107
|
CD
7 CD 7 m
I
7B-113
I
CO CM
7 CO r-.
m cn
7 CO r-.
cn
7 DO r-
CM CM
7 CO
|
7B-126
CO
1*-r*-
7 m r-
\ Inspection point
and
\ reference page
Condition
•
Brake
light
switch
|
Inhibitor
switch
|
Mode
switch
|
1
CO. •o o X
Idle
switch
Throttle
sensor
|
Water
temp,
switch
|
0 tn c 0) cn
s
ffi
Q tn 01 o Hi >
Pulse
generator
|
"a o c 0) a to CM
TJ O CL ID s CO C\l 3-4
solenoid
|
Lock-up
solenoid
I
ATF
level
and
condition
|
Selector
lever
m Xj CO CJ 03
1 sz
Idle
speed
and
Ignition
timing
Control
valves
Accumulators
Oil
pump
Hydraulic
circuit
Torque
converter
Forward
clutch
Coasting
clutch
Reverse
clutch
JT O
u TT ro 2-4
brake
band
and
servo
$ 2
B cn cii > £ "O C CO
o
XI y
o >. CO S cb a O
One-way
clutch
2
s CI Cn tz JC 5 0-
Planetary
gear
Differential
assembly
Accelerating
Vehicle does
not
move
in
D,
S,
L,
or R
range
O O O O O O O O O O 0
Accelerating
Vehicle moves
in N
range -0 0 -—
Accelerating
Excessive creep
-0 O O -—
Accelerating
No creep
at all
O o o o
o
G 0 O O
Shifting
|
No shift
O O o
o
0 O 0 0
o
o O
Shifting
|
Abnormal shift sequence
0 o O O 0
o
o 0 O o o 0 O
Shifting
|
Frequent shifting 0 o 0 0 o 0 O O 0
Shifting
|
Excessively high
or
low
shift point 0 o 0 O 0 0 o 0 O 0 0
Shifting
|
No lock-up
0 o 0 0 o 0 O O o O
Shifting
|
No kick-down o o o o
Slipping
Engine
run
away
or
slip when
starting vehicle 0 o 0 O o O
Slipping
Engine
run
away
or
slip when
up-
or
down-shifting o o o 0 o O 0 0 O
8 n cn 4S SI V)
Excessive
N to D or N to R
shift shock o O o o o O
8 n cn 4S SI V)
Excessive shift shock when
up-
shifting
or
downshifting o o o o 0 0 0 8 n cn 4S SI V) Excessive shift shock when
changing range 0 0 o 0 o
j
Noise
Transaxle noisy
in N or P
range o o 0 O
j
Noise
Transaxle noisy
in D, S, L,
or
R range o 0 0 O
I
Others
j
No engine braking o O o 0 o o
I
Others
j
No mode change o 0 o o o o o o o
O
o
0
I
Others
j
Transaxle overheats
o o
0 o 0 o 0
I
Others
j
Vehicle moves
in
"P",
or
park-ing gear
not
disengaged when
"P"
is
dis-
engaged
0 O
I
Others
j
Hold indicator flashes o
0
o
0
o
O
o — — —
I
Others
j
Engine will
not
start
o
o
O — — —
76G07B-014
7B—14
Page 909 of 1865
TROUBLESHOOTING (G4A-HL) 7B
-ON VEHICLE-OFF VEHICLE-
Accele-rating
Shifting
Slipping
Inspection point and reference page
Electrical
control
system
i
1-5
1 CD 3
a s
si "9 .i ca y
5 ^
m T
CO i CD
I ' i m cd r«. r-
Shift shock
Noise
Others
Vehicle does not move in D, 2, 1, or R range
Vehicle moves in N
range
Excessive creep
No creep at all
No shift
Abnormal shift
sequence
Frequent shifting
Excessive high or low shift point
No lock-up
No kick-down
Engine run away or slip when starting vehicle
Engine run away or slip when up- or down-shifting
Excessive N to D or N to R shift shock
Excessive shift shock when upshifting or downshifting
Excessive shift shock when changing range
Transaxle noisy in N or
P range
Transaxle noisy in
D, 2, 1, or R range
No engine braking
Transaxle
overheats
Engine will not start O
O
O
o
Prelim
i
nary
i r
o
o
o
o
o
o
o
(I) > m c > u "O ri O r c CI CD o O CO Tl O CO r
o
o
o
o
Hydraulic
control
system "T
(M | ro
m mim
O
O
O
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
0
o
o
o
10 •-.
to ,
> CL P
c/> i
61 a1 ® a
El I I =
I
a | o,8 = 2 O < O
O
o
o
o
o
o
o
o
o
o
o
0
o
o
o
o
o
o
Power train
§| 2' >
l-Oi
O >v CD I!
:
I
o
o
o
o
o
o
o
o
o
o
o
o
Q
o
o
o
o
o
o
o
o
o
o
o
o
o
"l-ol
oo
CD I CO 1
> 0 10! o cc
I o >
53
to
to cn
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
O J-O
m oj
CO "tf" (M CO
m m
O
o
o
o
o
o
o
I I
*" W ! j:
.c )
u o to I ^
i
51 SI ul
O
ca
aj
A 1
c
1
® S. S. « —IS OOQ.0.Q
^
CM
CD CO C\J
CM
o
o
o
O
O
o
o
o
o
o o
o
o
o
o
o
o
o
o
o
o
o
o o
76G07B-042
7B—43
Page 1125 of 1865
![MAZDA 626 1987 Workshop Manual
TROUBLESHOOTING
7C
ON VEHICLE -OFF VEHICLE
-
\ Inspection point
\
and
reference
\ page
Condition
in cd
ra
CM CM CM
I
I I
o
o o
I—
r~—
r—
7C—27
7C—23,24
Section
4A](/manual-img/28/57059/w960_57059-1124.png "MAZDA 626 1987 Workshop Manual
TROUBLESHOOTING
7C
ON VEHICLE -OFF VEHICLE
-
\ Inspection point
\
and
reference
\ page
Condition
in cd
ra
CM CM CM
I
I I
o
o o
I—
r~—
r—
7C—27
7C—23,24
Section
4A")
TROUBLESHOOTING
7C
ON VEHICLE -OFF VEHICLE
-
\ Inspection point
\
and
reference
\ page
Condition
in cd
ra
CM CM CM
I
I I
o
o o
I—
r~—
r—
7C—27
7C—23,24
Section
4A
7C—14
7C—20,22
7C-75
CM
0>
[—
CO
LO I
I I
O
O O
r^ r—
Section
5
CD CM
O
in (D
s
I
I I
o
o o
r—
r^
w
CM
r-
m f-
I
I I
o
o o
r-— I—
r-—
7C—54
7C-71
7C—66,
98
7C-68,
71 \ Inspection point
\
and
reference
\ page
Condition
ATR
level
and
condition
Selector
lever
Inhibitor
switch
and
wiring
Vacuum
diaphragm
and
piping
Kick-down
solenoid,
kick-down
switch
and
wiring
Engine
idle
speed
and
condition
Engine
stall
speed
Fluid
pressure
(Line
and
governor)
Control
valves
Governor
valve
Band
servo
Transaxle
air
check
Ignition
switch
and
starter
Front
clutch
Rear
clutch
Brake
band
Low
and
reverse
brake
Oil
pump
Hydraulic
circuit
Torque
converter
One-way
clutch
Parking
linkage
Planetary
gear
Snift
sequence
Shifts from
1st to
2nd
or
2nd
to
3rd
in 1
range
Slipping
Practically
no
shift shock,
or
slip-page while 1st
to
2nd shifting 1
2 •
3
• •
•
4 5
•
7 6
• •
• ©
•
• ©
•
• •
•
Slipping
Pracatically
no
shift shock
or
slip-page while 2nd
to
3rd shifting 1
2 •
3
• •
•
4 5
•
7 6
•
Slipping
No shift shock
or
engine runaway
in 1 to 2
range shift 1
2 •
3
• 4
5
• 6
•
• 7
• •
• ©
•
© •
•
• •
•
Slipping
Engine runaway
or
slip when shifting
3rd to 2nd
1
• •
2
• •
•
3 4
•
5 6
• ®
• ©
•
• ®
•
• •
•
Slipping
Slippage evident when vehicle starts moving 1
2 •
5
• •
•
3 4
•
• 6
• •
• •
•
® ©
•
• •
•
Noise
Transaxle noisy
in P and N
range
Noise
Transaxle noisy
in D, 2, 1 and
R ranges •
(D •
•
© •
•
© •
©
Others
No engine brake
in 1
range •
1 •
•
• •
•
2 3
•
• 4
• •
• •
©
• ©
•
• •
•
Others
Vehicle moves
in P
range
or
parking gear
not
disengaged when
P
range disengaged
•
Others
Transaxle overheats 3
4 5
•
2 6
• ®
©
(D ©
© ©
©
• •
©
Others
White smoke from exhaust while running 1
• •
2
• •
3
4 5
•
• 6
• ®
© ©
©
© ©
©
• •
@
Others
Abnormal odor from
oil
level gauge pipe ©
® ©
©
© ®
©
• •
©
76G07C-016
Differential
Problem Probable Cause Remedy Page
Noise Insufficient fluid Add 7C—25
Low fluid quality Replace with specified
ATF
7C-25
Worn bearing Adjust
or
replace 7C-79
Contact surface
of
gears worn Replace 7C-79
Tooth surface
of
gears damaged Replace 7C-79
Contaminated
ATF
Repair
or
replace 7C-25
Differential gear damaged, excessive backlash Replace 7C-79
Excessive bearing preload Adjust 7C—94
76G07C-017
7C—11