Toyota Camry Manual page 242

AUTOMATIC TRANSAXLE –
The diagnosis system operates in normal mode during
normal vehicle use, and also has a check mode for
technicians to simulate malfunction symptoms and
perform troubleshooting. Most diagnostic trouble
codes use 2 trip detection logic(') to prevent errone–
ous detection. By switching the ECM to check mode
when troubleshooting, the technician can cause the
MIL to light up and 0/D OFF indicator lights to blink
for a malfunction that is only detected once or mo–
mentarily. (TOYOTA hand–held tester)
(See page AX2–56)
' 2 trip detection logic:
When a logic malfunction is first detected, the mal–
function is temporarily stored in the ECM memory. If
the same malfunction is detected again during the
second test drive, this second detection causes the
MIL to light up and O/D OFF indicator lights to blink.
DIAGNOSIS INSPECTION (NORMAL MODE)
MALFUNCTION INDICATOR LAMP CHECK
1. The malfunction indicator lamp comes on when the
ignition switch is turned ON and the engine is not
running.
HINT: If the malfunction indicator lamp does not light
up, troubleshoot the combination meter (See page BE–65)
2. When the engine is started, the malfunction indicator
lamp should go oft. If the lamp remains on, the diagno–
sis system has detected a malfunction or abnormality
in the system
DIAGNOSTIC TROUBLE CODE CHECK
NOTICE (TOYOTA hand–held tester only): When the
diagnostic system is switched from normal mode to
check node, it erases all diagnostic trouble codes and
freezed frame data recorded in normal mode. So
before switching modes, always check the diagnostic
trouble codes and freezed frame data, and note them
down.
1. Prepare the OBDII scan tool (complying with SAE J
1978) or TOYOTA hand–held tester.
2. Connect the OBDll scan tool or TOYOTA hand–held
tester to data link connector 3 in the fuse box at the
lower left of the instrument panel.
3. Turn the ignition switch ON and turn the OBDII scan
tool or TOYOTA hand–held tester switch ON.
TROUBLESHOOTING
AX2–55