Throttle Body Inspection - Toyota 1 MZ–FE Manual

EG2–268
1MZ–FE ENGINE – SFI SYSTEM

THROTTLE BODY INSPECTION

1. CLEAN THROTTLE BODY
(a) Using a soft brush and carburetor cleaner, clean the
cast parts.
(b) Using compressed air, clean all the passages and
apertures.
NOTICE: To prevent deterioration, do not clean the throt–
tle position sensor.
2. INSPECT THROTTLE VALVE
(a) Apply vacuum to the throttle opener.
(b) Check that there is no clearance between the throttle
stop screw and throttle lever when the throttle valve
is fully closed.
3. INSPECT THROTTLE POSITION SENSOR
(a) Apply vacuum to the throttle opener.
(b) Insert a thickness gauge between the throttle stop
screw and stop lever.
(c) Using an ohmmeter, measure the resistance between
each terminal.
Clearance between
lever and stop screw
0 mm (0 in.)
0.35 mm (0.014 in.)
0.70 mm (0.028 in.)
Throttle valve fully
open
4. IF NECESSARY, ADJUST THROTTLE POSITION
SENSOR
(a) Loosen the 2 set screws of the sensor.
Between
Resistance
terminals
0.28 – 6.4 kW
VTA –.E2
IDL – E2 0.5 k(W or less
IDL – E2
2.0 – 11.6 k W
VTA – E2
VC – E2 2.7 – 7.7 kW
Infinity