1996 TOYOTA T100 engine

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P21653
− MFI (3RZ−FE)THROTTLE BODY
MF−29
1996 TOYOTA T100 (RM449U)
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 aper-
tures.
NOTICE:
To prevent deterioration, do not clean the throttle position
sensor and IAC valve.
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 closed throttle position.
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 screwBetween terminalsResistance
0 mm (0 in.)VTA − E20.2 − 5.7 kΩ
0.50 mm (0.020 in.)IDL − E22.3 kΩ or less
0.75 mm (0.030 in.)IDL − E2Infinity
Throttle valve fully openVTA − E22.0 − 10.2 kΩ
−VC − E22.5 − 5.9 kΩ

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MF−30
− MFI (3RZ−FE)THROTTLE BODY
1996 TOYOTA T100 (RM449U)
INSTALLATION
Installation is in the reverse order of removal (See page MF−28).

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P16016
P15974
− MFI (3RZ−FE)IDLE AIR CONTROL (IAC) VALVE
MF−31
983 Author: Date:
1996 TOYOTA T100 (RM449U)
IDLE AIR CONTROL (IAC) VALVE
ON−VEHICLE INSPECTION
1. INSPECT IAC VALVE OPERATION
(a) Initial conditions:
Engine at normal operating temperature
Idle speed set correctly
Transmission in neutral range
(b) Using SST, connect terminals TE1 and E1 of the
DLC1.
SST 09843−18020
(c) After engine rpm are kept at 1,000 − 1,500 rpm for 5 se-
conds, check that they return to idle speed.
If the rpm operation is not as specified, check the IAC valve, wir-
ing and ECU.
(d) Remove SST.
SST 09843−18020
2. INSPECT IAC VALVE RESISTANCE
NOTICE:
”Cold” and ”Hot” in the following sentences express the
temperature of the coils themselves. ”Cold” is from −10°C
(14°F) to 50°C (122°F) and ”Hot” is from 50°C (122°F) to
100°C (212°F).
(a) Disconnect the IAC valve connector.
(b) Using an ohmmeter, measure the resistance between ter-
minal +B and other terminals (RSC, RSO).
Resistance:
Cold: 21.5 − 28.5Ω
Hot: 17.0 − 24.5Ω
If resistance is not as specified, replace the IAC valve.
(c) Reconnect the IAC valve connector.

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P21639
MF−32
− MFI (3RZ−FE)IDLE AIR CONTROL (IAC) VALVE
1996 TOYOTA T100 (RM449U)
COMPONENTS

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P15135
− MFI (3RZ−FE)IDLE AIR CONTROL (IAC) VALVE
MF−33
1996 TOYOTA T100 (RM449U)
REMOVAL
1. REMOVE THROTTLE BODY
(See page MF−28)
2. REMOVE IAC VALVE
Remove the 4 screws, IAC valve and gasket.

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P15730
Closed
RSC+B
Battery
P15729+B
Open
RSO
Battery MF−34
− MFI (3RZ−FE)IDLE AIR CONTROL (IAC) VALVE
1996 TOYOTA T100 (RM449U)
INSPECTION
INSPECT IAC VALVE OPERATION
(a) Connect the positive (+) lead from the battery to terminal
+B and negative (−) lead to terminal RSC, and check that
the valve is closed.
(b) Connect the positive (+) lead from the battery to terminal
+B and negative (−) lead to terminal RSO, and check that
the valve is open.

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P15136
New Gasket
− MFI (3RZ−FE)IDLE AIR CONTROL (IAC) VALVE
MF−35
1996 TOYOTA T100 (RM449U)
INSTALLATION
1. INSTALL IAC VALVE
(a) Place a new gasket on the throttle body.
(b) Install the IAC valve with the 4 screws.
2. INSTALL THROTTLE BODY
(See page MF−30)

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MF−36
− MFI (3RZ−FE)MASS AIR FLOW (MAF) METER
988 Author: Date:
1996 TOYOTA T100 (RM449U)
MASS AIR FLOW (MAF) METER
COMPONENTS