Toyota ZZT230 series, Repair Manual

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c
C H E C K
01-159
DIAGNOSTICS
-
AUTOMATIC TRANSAXLE 2. INSPECT DIAGNOSIS (NORMAL MODE)
(a) Check the MIL.
H
I
NT
:
(1)
The MIL comes on when the ignition switch is turned
ON
and the engine is not running.
If the MIL does not light up, troubleshoot the combination meter
(See page BE-2).
(2) When the engine is started, the MIL should go off.
If
the lamp remains on, the diagnosis system has
detected a malfunction or abnormality in the sys­
tem.
(b) Check the
DT
C.
NOTICE:
TOYOTA hand-held tester only: When the diagnostic sys­
tem Is switched from normal mode to check mode, It erases
all OTCs and freeze frame data recorded In normal mode.
So before switching modes, always check the DTCs and
freeze frame data, and note them down.
(1)
Prepare a n
OBD
II scan tool (complying with SAE
J1978)
or
TOYOTA
hand-held tester.
(2)
Connect the OBD II scan tool or
TOYOTA
hand­
held tester to DLC3 at the lower of the instrument
paneL
(3) Turn the ignition switch
ON
and turn the
OBD
II
scan
tool or
TOYOTA
hand-held tester switch
ON.
(4)
Use the
OBD II
scan tool or
TOYOTA
hand-held
tester to check the DTCs and freeze frame data and
nate them down (For operating instructions, see the
OBD
II scan tool's instruction book).
(5)
NOTICE:
See page
m-168
to confirm the details of the DTCs.
When simulating symptoms with an OBD II scan tool (ex­
cluding TOYOTA han�eld tester) to check the DTCs, use
normal mode. For codes on the DTCs chart subJect to
"2-trlp detection logic", turn the Ignition switch OFF after
the symptoms have been simulated the 1st time. Then re­
peat the simulation process again. When the program has
DTCs are recorded
in
the ECM.