1996 TOYOTA T100 engine repair

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ECT
(−) (+)
DI−442
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 TOYOTA T100 (RM449U)
3 Check voltage between terminal ECT of cruise control ECU connector and body
ground (On test drive).
PREPARATION:
(a) Connect the ECU connector.
(b) Test drive after engine warms up.
CHECK:
Check voltage between terminal ECT of ECU connector and
body ground when OD switch is ON and OFF.
OK:
OD switch positionVoltage
ONBelow 1 V
OFF10 − 16 V
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI−419).
NG
4 Check harness and connector between terminal ECT of cruise control ECU and
electronically controlled transmission solenoid (See page IN−16).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU.(See
page IN−26)
5 Check harness and connector between terminal OD of cruise control ECU and
terminal OD1 of ECM (See page IN−16).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU (See
page IN−26).

Downloaded from www.Manualslib.com manuals search engine AB0119
I00017
I00026
ON
N&C
(−)
(+)
− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−445
1996 TOYOTA T100 (RM449U)
3 Check voltage between terminal N & C of cruise control ECU connector and
body ground.
PREPARATION:
Turn ignition switch ON.
CHECK:
Measure each voltage between terminal N & C of ECU connec-
tor and body ground when shifting into D position and other
positions.
OK:
Shift PositionVoltage
D position10 − 16 V
Other positionsBelow 1 V
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI−419).
NG
4 Check harness and connector between cruise control ECU and park/neutral
position switch (See page IN−16).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU (See
page IN−26).

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I00017
I00026
ON
N&C
(+) (−)
DI−448
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 TOYOTA T100 (RM449U)
3 Check voltage between terminal N & C of cruise control ECU and body ground.
PREPARATION:
Turn ignition switch ON.
CHECK:
Measure voltage between terminal N & C of cruise control ECU
connector and body ground when clutch pedal is depressed
and released.
OK:
Shift PositionVoltage
Clutch pedal releasedBelow 1 V
Clutch pedal depressed10 − 16 V
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI−419).
NG
4 Check for open in harness and connector between ECU and GAUGE fuse (See
page IN−16).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU (See
page IN−26).

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GND
− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−451
1996 TOYOTA T100 (RM449U)
3 Check resistance between terminal GND of cruise control ECU connector and
body ground (See page IN−16).
CHECK:
Measure resistance between terminal GND of ECU connector
and body ground.
OK:
Resistance: Below 1 Ω
NG Repair or replace harness or connector.
OK
Check and repair harness and connector be-
tween cruise control ECU and battery (See
page IN−26).

Downloaded from www.Manualslib.com manuals search engine N06038
ECU−B Fuse
I00016
BATT
(−)
(+)
− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−453
1996 TOYOTA T100 (RM449U)
INSPECTION PROCEDURE
1 Check ECU−B fuse.
PREPARATION:
Remove the ECU−B fuse from relay block No.1.
CHECK:
Check continuity of ECU−B fuse.
OK:
Continuity
NG Check for short in all the harness and compo-
nents connected to the ECU−B fuse.
OK
2 Check voltage between terminal BATT of cruise control ECU connector and body
ground (See page IN−16).
PREPARATION:
Remove the ECU with connector still connected.
CHECK:
Measure voltage between terminal BATT of ECU connector
and body ground.
OK:
Voltage: 10 − 16 V
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI−419).
NG
Check and repair harness and connector be-
tween battery and cruise control ECU (See
page IN−16).

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42
− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−455
1996 TOYOTA T100 (RM449U)
2 Check main switch continuity.
PREPARATION:
(a) Remove steering wheel center pad. (See SR section)
(b) Disconnect the control switch connector.
CHECK:
Check continuity between terminals 2 and 4 of control switch
connector when main switch is held ON and OFF.
OK:
Switch positionTester connectionSpecified condition
OFF2 − 4No continuity
Hold ON2 − 4Continuity
NG Replace control switch.
OK
3 Check harness and connector between cruise control ECU and main switch (See
page IN−16).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU (See
page IN−26).

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DLC1
E1
TC
− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−457
1996 TOYOTA T100 (RM449U)
INSPECTION PROCEDURE
1 Check voltage between terminals Tc and E1 of DLC1.
PREPARATION:
Turn ignition switch ON.
CHECK:
Measure voltage between terminals Tc and E1 of DLC1.
OK:
Voltage: 10 − 16 V
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI−419).
NG
2 Check harness and connector between cruise control ECU and DLC1, DLC1 and
body ground (See page IN−16).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU (See
page IN−26).

Downloaded from www.Manualslib.com manuals search engine EC02N−02
− EMISSION CONTROL (3RZ−FE)EMISSION CONTROL SYSTEM
EC−1
929 Author: Date:
1996 TOYOTA T100 (RM449U)
EMISSION CONTROL SYSTEM
PURPOSE
The emission control systems are installed to reduce the amount of CO, HC and NOx exhausted from the
engine ((3), (4) and (5)), to prevent the atmospheric release of blow−by gas−containing HC (1) and evapo-
rated fuel containing HC being released from the fuel tank (2).
The function of each system is shown in these table.
SystemAbbreviationFunction
(1) Positive Crankcase Ventilation
(2) Evaporative Emission Control
(3) Exhaust Gas Recirculation
(4) Three−Way Catalytic Converter
(5) Multiport Fuel Injection *PCV
EVAP
EGR
TWC
MFIReduces HC
Reduces evaporated HC
Reduces NOx
Reduces CO, HC and NOx
Injects a precisely timed, optimum amount of fuel for reduced exhaust
emissions
Remark: * For inspection and repair of the MFI system, refer to the MF section this manual.