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4A
TROUBLESHOOTING GUIDE
TROUBLESHOOTING GUIDE
This troubleshooting guide shows the malfunction numbers and the symptoms of various failures.
Perform troubleshooting as described below.
Possible cause
Symptom
Fault Indicated by SST
Code No.
Hard start or won't
start (Cranks OK)
While warming up
Engine
stalls
After warming up
Rough
White warming up
idle
After warming up
High idle speed after
warming up
Poor acceleration, hesi
tation or lack of power
Runs rough on deceleration
Afterburn in exhaust system
Poor fuel consumption
9
Engine stalls or rough
10
after hot starting
Fails emission test
11
Input sensors and switches
o
co
c
4)
CO
c
O
a >
E
co
w (0
4 >
o
E
Q)
3
E
a
£ o
c
o
a >
CD
■H
C O
C O
c
o >
5
4A-15
4A-17
4A-18
4A-16
08
09
10
01
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)
1 st: Check input sensors and output solenoid valves with the SST. (Refer to
page 4A—11.)
2nd: Check other switches with the SST. (Refer to page 4A—26.)
3rd: Check the following items:
Electrical system
1) Battery condition
2) Fuses
Fuel system
1) Fuel level
2) Fuel leakage
3) Fuel filter
4) Idle speed (with test connec
tor grounded)
Engine
1) Compression
2) Overheating
4th: Check Fuel and Emission Control Systems. (Refer to page 4A—9.)
o
co
c
4 >
CO
£ 3
8
E
£
a >
o
o
CL
c o
O
co
c
c
a > c o
O
a
c
C O
co
0)
o
o>
JD
"o
) a >
E
0
IL .
4A-19
4A-20
4A-21
4A-22
12
14
15
17
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
Output solenoid valves
o
J B O
3
o
O )
o
£
2
>
Q .
3
)
0
s
CO
cc
CD
0
)
0)
O
w -
2
&
u
) >
0
) >
0
0 >
?
>
C O
C O
§
>
>
5
*o
T J
2
■ o
o
o
o
O
c
c
c
c
)
)
0
0
©
®
o
o
o
o
O )
)
(O
0
(0
4A—23
4A-23
4A-24
4A-24
25
26
28
34
86U04A-008
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Table of Contents
Troubleshooting
