1996 TOYOTA T100 check engine

Downloaded from www.Manualslib.com manuals search engine I00019
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 Input SignalIndicator Light
Blinking Pattern
Turn PNP switch
OFF (Shift to
except D position)LightON
OFFSW ON
SW OFF
DI−444
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 TOYOTA T100 (RM449U)
INSPECTION PROCEDURE
1 Check starter operation.
CHECK:
Check that the starter operates normally and that the engine starts.
NG Proceed to engine troubleshooting.
(3RZ−FE: See page DI−1)
(5VZ−FE: See page DI−127)
OK
2 Input signal check.
PREPARATION:
See input signal check on page DI−410.
CHECK:
Check the indicator light when shifting into except D position.
OK:
The indicator light goes off when shifting into except
D position.
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI−419).
NG

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).

Downloaded from www.Manualslib.com manuals search engine Input Signal
Indicator Light
Blinking Pattern
Clutch switch
OFF (Depress
clutch pedal)
LightON
OFFSW ON
SW OFF
− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−447
1996 TOYOTA T100 (RM449U)
INSPECTION PROCEDURE
1 Check starter operation.
CHECK:
Check that the starter operates normally and that the engine starts.
NG Proceed to engine troubleshooting.
(3RZ−FE: See page DI−1)
(5VZ−FE: See page DI−127)
OK
2 Input signal check.
PREPARATION:
See input signal check on page DI−410.
CHECK:
Check the indicator light when clutch pedal is depressed.
OK:
The indicator light goes off when depressing the
clutch pedal .
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI−419).
NG

Downloaded from www.Manualslib.com manuals search engine AB0119
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).

Downloaded from www.Manualslib.com manuals search engine N06038
ECU−IG Fuse
AB0119
I00014I00027
GND B ON
(−)(+)
DI−450
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 TOYOTA T100 (RM449U)
INSPECTION PROCEDURE
1 Check ECU−IG fuse.
PREPARATION:
Remove the ECU−IG fuse from instrument panel junction block.
CHECK:
Check continuity of ECU−IG fuse.
OK:
Continuity
NG Check for short in all the harness and compo-
nents connected to ECU−IG fuse.
OK
2 Check voltage between terminals B and GND of cruise control ECU connector.
PREPARATION:
(a) Remove the ECU with connector still connected.
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminals B and GND of ECU con-
nector.
OK:
Voltage: 10 − 16 V
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI−419).
NG

Downloaded from www.Manualslib.com manuals search engine I00018
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).