Throttle Body On-Vehicle Inspection - Toyota T100 1996 Service Manual

1996 TOYOTA T100 (RM449U)
MFI (3RZ−FE) − THROTTLE BODY
THROTTLE BODY
ON−VEHICLE INSPECTION
1. INSPECT THROTTLE BODY
(a) Check that the throttle linkage moves smoothly.
B02580
(b) Check the vacuum at each port.
(1) Start the engine.
(2) Check the vacuum with your finger.
Port name
P
E
R
2. INSPECT THROTTLE POSITION SENSOR
(a) Disconnect the sensor connector.
(b) Apply vacuum to the throttle opener.
(c) Using an ohmmeter, measure the resistance between
each terminal.
Throttle valve
condition
Fully closed
Fully closed
Open
Fully open
−
(d) Connect the sensor connector.
3. INSPECT THROTTLE OPENER
(a) Warm up engine
Allow the engine to warm up to normal operating tempera-
ture.
(b) Connect TOYOTA hand−held tester or OBD II scan tool.
(c) Check idle speed
Idle speed: 700 rpm
(d) Disconnect the vacuum hose from the throttle opener,
and plug the hose end.
At idle
No vacuum
No vacuum
No vacuum
Between
terminals
VTA − E2
IDL − E2
IDL − E2
VTA − E2
VC − E2
Author : Date :
MF−25
SF1QK−01
At 3,500 rpm
Vacuum
Vacuum
Vacuum
Resistance
0.2 − 5.7 kΩ
2.3 kΩ or less
Infinity
2.0 − 10.2 kΩ
2.5 − 5.9 kΩ
977