Toyota ZZT230 series, Repair Manual

Page: 32 / 821

)
)
INTRODUCTION
- HOW
TO TROUBLESHOOT
ECU CONTROLLED
SYSTEMS
5.
PROBLEM SYMPTOMS TABLE
IN-27
The suspected
circuits or parts for
each problem symptom are shown
in
the
table below.
Use this table
to
troubleshoot
the problem wh
en a "Normal"
code is
displayed In the diagnostic trouble code check but the
problem
is
still o
c
c
u r
ri
ng
.
Numbers in the table indicate
the
inspection
order i
n which the
circuits or parts
should be checked.
HINT:
When the problem is
no
t
detected by the diagnostic system
even
though the
problem symptom is
present,
it is considered that the problem is occurring outside
the
detection range
of the
diagnostic
system, or that
the
problem is
o
c
cu
r
r
i
n
g
in a system
other
than
the diagnostic
system.
•
Page
cui!
Indicates the page
where
the
flow
chart
for each cir
is located.
•
C
i
r c u
i
t
Inspection, Inspection Order
Indicates the circuit w h i c
h
needs to be checked
f
or each problem
symptom. Check in the order indicated by the numbers.
•
Circuit or Part Name
•
Problem Symptom
Indicates the circuit or part
which
needs to
be checked.
SYMPTOMS
Suspect Area See page
ST 2
Er!Qine does not crank (Does not start)
1.
Starter and starter relay
ST-17
1. ECM power source circuit
Dl-147
No initial combustion (Does not start)
2.
fuel pump control circuit
Dl-151
3.
control module
IN-29
No complete combustion (Does not start) 1 . Fuel pump control circuit
Dl-151
1. Starter signal circuit
Dl-144
Engine cranks normally (Difficult to start)
2.
Fuel pump control circuit
01-151
3. Compression
EM-3
1.
Starter signal circuit
01 144
Cold engine {Drtticull to start}
2.
Fuel pump control circuit
01-151
Hot engine
1 . Starter signal circuit 01-144
2.
Fuel pump control circuit
01-151
d (Poor idling)
1 . A/C signal circuit (Compressor circuit}
2. ECM power source circuij
1. NC signal circu"1t
2.
Fuel pump control circuit
1.
Compression