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DIAGNOSTICS
ENGINE
DI-101
255
Author:
Date:
2001 SIENNA (RM787U)
INSPECTION PROCEDURE
HINT:
Read freeze frame data using TOYOTA hand held tester or OBD II scan tool. Because freeze frame records
the engine conditions when the malfunction is detected, when troubleshooting it is useful for determining
whether the vehicle was running or stopped, the engine warmed up or not, the air-fuel ratio lean or rich, etc.
at the time of the malfunction.
1
Check engine idle speed.
PREPARATION:
(a)
Warm up engine to normal operating temperature.
(b)
Switch off all accessories.
(c)
Switch off air conditioning.
(d)
Shift transmission into ”N” or neutral position.
(e)
Connect the OBD II scan tool or TOYOTA hand-held tester to DLC3 on the vehicle.
(f)
Using SST, connect terminals TE1 and E1 of the DLC3.
CHECK:
Check the difference of engine speed between the ones less than 5 sec. and more than 5 sec. after connect-
ing terminals TE1 and E1 of the DLC1.
OK:
Difference of engine speed: More than 100 rpm
OK
NG
