4
DIAGNOSIS
- OBD-II (On-Board Diagnostic System
)
Conventional OBD
New OBD (OBD-II
)
CHECK
ENGINE
When a proble
m
LAMP has been detected
Lights
Lights or blink
s
When the proble
m
has been solved
Goes off after about 5 seconds
Goes off after 2 or 3 trip
s
DIAGNOSTIC
Code
2 digits
(
e
.g
.
: 25, 31)
5 digits (e
.g
.
: P0120
)
CODE
Reading operation
Connection of terminal TE
1
and terminal
E
l
Code display
"CHECK ENGINE" lamp blink
s
Code clearing*'
Removal of
memory
fuse
OBD-II scan tool o
r
TOYOTA
hand-held teste
r
ENGINE ECU
Reading operation
Connection of terminal TE
2
DATA
and terminal
E
l
Reading
DIAGNOSIS REDER, DIAGNOSI
S
instruments
MONITOR,
or TOYOTA
hand-hel
d
teste
r
Output terminal
Terminal VF
Terminal SDL*
2
Communication
Slow (about 1
.5 seconds)
Fast
(
about 0
.05 to 1
.0 seconds
)
rate
Data display
Few
Man
y
item
s
Data displa
y
method
Toyota standard
SAE standar
d
ACTIVE TEST*3
Not available
Available
(
performed using a
n
OBD-II scan
tool or TOYOT
A
FREEZE-FRAM DATA
Not available
hand-held tester
)
*
i
+ z
•3
In the case of a new OBD (OBD-II), diagnostic codes can also be cleared by removing the memory fuse in the
same manner as the conventional OBD
.
SDL
; The communication terminal between the Engine
ECU and the TOYOTA
hand-held tester
use the VPW
(
Variable Pulse
Width)
system in accordance
with the
SAE J1850 requirements
.
Actuators (injector, ISC valve, etc
.) are operated by sending a signal from the tester to the Engine ECU
.
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