Toyota ZZT230 series, Repair Manual

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Dl-0
DIAGNOSTICS
-
ENGINE
(4) Use the OBD II scan tool or TOYOTA hand-held
tester to check the DTCs and freezed frame data,
note them down (For operating instructions, see the
OBD
II
scan tool's instruction book.).
(5)
NOTICE:
See page Dl-3 to confirm the details of the DTCs.
When simulating symptoms with an
080
I
I
scan tool (ex�
eluding TOYOTA hand-held tester) to check the DTCs, use
normal mode. For code on the DTC chart subJect to "2 trip
detection logic"
I
perform the following either action.
•
Turn the Ignition switch OFF after the symptom Is
simulated the 1st time. Then repeat the simulation
process again. When the problem has been simulated
twice, the MIL lights up and the DTCs are recorded In
the ECM.
•
Check the 1st trip OTC using Mode 7 (Continuous Test
Results) for SAE J1979.
(c) Clear the DTC.
The DTC and freezed frasme data will be erased by either
action.
(1) Operating the OBD II scan tool (complying wilh SAE
J1998) or TOYOTA hand-held tester to erase the
codes.
(2) Disconnecting the battery terminals or EFI fuse.
NOTICE:
If the TOYOTA hand-held tester switches the ECM from
normal mode to check mode or vise-verse, or If the Ignition
switch Is turned from ON to ACC or OFF during check
mode, the DTCs and freezed frame data will be erased.
3. INSPECT DIAGNOSIS (Check Mode)
HINT:
TOYOTA hand-held tester only:
Compared to the normal mode, the check mode has an in­
creased sensitivity to detect malfunctions.
Furthermore, the same diagnostic items which are detected in
the normal mode can also be detected in the check mode.
(a) Check the DTC.
(1) Initial conditions
•
Battery positive voltage 1 1 V or more.
•
Throttle valve fully closed.
•
Transmission in HPH or
"W
position.
•
Air conditioning switched OFF.
(2) Turn ignition switch OFF.
(3) Prepare lhe TOYOTA hand-held tester.
(4) Connect the TOYOTA hand-held tester to the
DLC3 under the instrument panel lower pad.
If there is no DTC in normal mode, check the 1st trip DTC using
Continuous Test Results function (Mode 7 for SAE J1979) on
the 08011 scan tool or TOYOTA hand-held tester.