Toyota ZZT230 series Repair Manual page 216

Tetminal No.
2
•
5
16
)
C H E C K
)
DIAGNOSTICS
Voltage o r Resistance
Connection I Ell
l
i
Bus n e I Pulse generation
/1 n
Chassi s Ground+-+ Body Ground /1 .0 or less
Signal Ground H Body
Ground
Positive +-+ Ground
I f HINT:
when you have connected the cable of the
TOYOTA hand-held tester to DLC3, turned the ignition switch
•
ON
hicle side or tool side.
•
2. I N SPECT DI A G NOSI S ( N ormal Mode)
(a)
H
If
(See page
··�
(b)
NOTICE: •
•
ENG INE
or less
V
19- 14
o r
"UNABLE TO CONNECT TO VEHICLE"
y u display shows
and operated the scan tool, there is a problem on the ve­
If
communication is normal when the tool is connected to
another vehicle, inspect DLC3 on the original vehicle.
If
communication is still not possible when the tool is con­
nected to another vehicle, the problem is probably in the
tool itself, so consult the Service Department listed in the
tool's instruction manual.
Check the MIL.
( 1 )
MIL
The comes on when the ignition switch is turned
I ON
and the engine is not running.
N :
T
the MIL does not light up, troubleshoot the combination meter
BE-2).
(2)
When the engine started, the
the lamp remains on, the diagnosis system has de­
tected a malfunction or abnormality in the system.
Check
the DTC.
there I s no DTC I n normal mode, check the 1st tri p
H
DTCusl n g.
Conti n uous Test Resul t s functi o n ( M ode 7 for SAE
J1979) on the OBDI I scan tool or TOYOTA hand-hel d
t e st e r .
TOYOTA hand-hel d t e st e r onl y : When the di
system I s swi t ched from normal mode to check
mode, I t erases al l DTCs and freezed frame dat a re­
corded I n normal mode. So before swi t chi n g modes,
al w ays check the DTCs and freezed frame data, and
note them down.
( 1 )
OBD II
Prepare the
TOYOTA
J1 978) or
OBD II
( 2)
Connect the
er
held tester to DLC3 under the instrument panel low­
pad.
or
(3) Turn the ignition switch
TOYOTA
tool
ConditiOn
During transmission
A�ays
Always
Always
OBD II
scan toot or
MIL
should go off.
scan tool (complying with
hand-held tester.
TOYOTA
scan tool or
ON OBD II
and turn the
hand-held tester switch
01-5
I!1J
If
o i
g
n
s s
a
SAE
hand­
scan
ON.