1996 TOYOTA T100 check engine

Downloaded from www.Manualslib.com manuals search engine MF−26
− MFI (3RZ−FE)THROTTLE BODY
978 Author: Date:
1996 TOYOTA T100 (RM449U)
(e) Check the throttle opener setting speed.
Throttle opener setting speed: 1,200 − 1,400 rpm
If the throttle opener setting is not as specified, replace the
throttle body.
(f) Stop the engine.
(g) Connect the vacuum hose to the throttle opener.
(h) Start the engine, and check that the idle speed returns to
the correct speed.
(i) Disconnect TOYOTA hand−held tester or OBDII scan
tool.

Downloaded from www.Manualslib.com manuals search engine SF0B3−03
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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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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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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P15781
MF−38
− MFI (3RZ−FE)MASS AIR FLOW (MAF) METER
1996 TOYOTA T100 (RM449U)
INSPECTION
INSPECT MAF METER OPERATION
(a) Connect negative (−) terminal cable to battery.
(b) Turn the ignition switch ON.
(c) Connect the MAF meter connector.
(d) Using a voltmeter, connect the positive (+) tester probe to
terminal VG, and negative (−) tester probe to terminal E3.
(e) Blow air into the MAF meter, and check that the voltage
fluctuates.
If operation is not as specified, replace the MAF meter.
(f) Turn the ignition switch OFF.
(g) Disconnect negative (−) terminal cable from battery.
(h) Disconnect the MAF meter connector.

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SF0BA−03
P07170
Ohmmeter
No
ContinuityContinuity
3Ohmmeter
2 1
5
P07171
Ohmmeter
3
2 1
5
Battery
MF−40
− MFI (3RZ−FE)EFI MAIN RELAY
992 Author: Date:
1996 TOYOTA T100 (RM449U)
EFI MAIN RELAY
INSPECTION
1. REMOVE EFI MAIN RELAY (Marking: EFI)
2. INSPECT EFI MAIN RELAY CONTINUITY
(a) Using an ohmmeter, check that there is continuity be-
tween terminals 1 and 2.
If there is no continuity, replace the relay.
(b) Check that there is no continuity between terminals 3 and
5.
If there is continuity, replace the relay.
3. INSPECT EFI MAIN RELAY OPERATION
(a) Apply battery voltage across terminals 1 and 2.
(b) Using an ohmmeter, check that there is continuity be-
tween terminals 3 and 5.
If there is no continuity, replace the relay.
4. REINSTALL EFI MAIN RELAY

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FI1908
FI1909
MF−42
− MFI (3RZ−FE)CIRCUIT OPENING RELAY
1996 TOYOTA T100 (RM449U)
INSPECTION
1. REMOVE GLOVE COMPARTMENT DOOR
2. REMOVE CIRCUIT OPENING RELAY
3. INSPECT CIRCUIT OPENING RELAY CONTINUITY
(a) Using an ohmmeter, check that there is continuity be-
tween terminals STA and E1.
If there is no continuity, replace the relay.
(b) Check that there is continuity between terminals +B and
FC.
If there is no continuity, replace the relay.
(c) Check that there is no continuity between terminals +B
and FP.
If there is continuity, replace the relay.
4. INSPECT CIRCUIT OPENING RELAY OPERATION
(a) Apply battery voltage across terminals STA and E1.
(b) Using an ohmmeter, check that there is continuity be-
tween terminals +B and FP.
If there is no continuity, replace the relay.
5. REINSTALL CIRCUIT OPENING RELAY
6. REINSTALL GLOVE COMPARTMENT DOOR

Downloaded from www.Manualslib.com manuals search engine P15774
P15773
SF0BE−01
P15772
P15771
− MFI (3RZ−FE)VSV FOR EVAPORATIVE EMISSION (EVAP)
MF−43
995 Author: Date:
1996 TOYOTA T100 (RM449U)
VSV FOR EVAPORATIVE
EMISSION (EVAP)
INSPECTION
1. INSPECT VSV FOR OPEN CIRCUIT
Using an ohmmeter, check that there is continuity between the
terminals.
Resistance: 30 − 34 Ω at 20°C (68°F)
If there is no continuity, replace the VSV.
2. INSPECT VSV FOR GROUND
Using an ohmmeter, check that there is no continuity between
each terminal and the body.
If there is continuity, replace the VSV.
3. INSPECT VSV OPERATION
(a) Check that air does not flow from pipe E to pipe F.
(b) Apply battery voltage across the terminals.
(c) Check that air flows from pipe E to pipe F.
If operation is not as specified, replace the VSV.