ignition TOYOTA T100 1996 Factory Workshop Manual

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P19553
P19698
P19673
A00047
Intake Air Temp.
Sensor
12 ON
7
9
9 12
THA E2
THA E2ECM
(M/T) (A/T)THA
E25 V
E1 E6
For M/T
For A/T
E6 E6E6
DI−30
− DIAGNOSTICSENGINE (3RZ−FE)
1996 TOYOTA T100 (RM449U)
3 Check for open in harness or ECM.
PREPARATION:
(a) Remove the right cowl side trim (See page MF−50).
(b) Connect between terminals THA and E2 of the ECM con-
nector.
HINT:
The intake air temp. sensor connector is disconnected. Before
checking, do a visual and contact pressure check for the ECM
connector (See page DI−3).
(c) Turn the ignition switch ON.
CHECK:
Read temp. value on the OBD II scan tool or TOYOTA hand−
held tester.
OK:
Temp. value: 140°C (284°F) or more
OK Open in harness between terminals E2 or THA,
repair or replace harness.
NG
Confirm good connection at ECM.
If OK, replace ECM.

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P19554
A00048
Intake Air Temp.
Sensor
7
1ECM
12
9
E6
E6THA
E25 V
E1
ON
E69 2
E6
(M/T)(A/T)
− DIAGNOSTICSENGINE (3RZ−FE)
DI−31
1996 TOYOTA T100 (RM449U)
4 Check for short in harness and ECM.
PREPARATION:
(a) Disconnect the intake air temp. sensor connector.
(b) Turn the ignition switch ON.
CHECK:
Read temp. value on the OBD II scan tool or TOYOTA hand−
held tester.
OK:
Temp. value: − 40°C (− 40°F)
OK Replace intake air temp. sensor.
NG

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FI7056
P19785
P19798
A00049
Intake Air Temp.
SensorON
ECM
THA
E25 V
E1
For M/T
For A/TE6 Connector
E6 Connector
DI−32
− DIAGNOSTICSENGINE (3RZ−FE)
1996 TOYOTA T100 (RM449U)
5 Check for short in harness or ECM.
PREPARATION:
(a) Remove the right cowl side trim (See page MF−50).
(b) Disconnect the E6 connector of the ECM.
HINT:
The intake air temp. sensor connector is disconnected.
(c) Turn the ignition switch ON.
CHECK:
Read temp. value on the OBD II scan tool or TOYOTA hand−
held tester.
OK:
Temp. value: − 40°C (− 40°F)
OK Repair or replace harness or connector.
NG
Check and replace ECM (See page IN−26 ).

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P19555
A00046
Engine Coolant
Temp. Sensor
1ECM
E6THW
E25 V
E1
ON
E6
2
(M/T) (A/T)E6 E6
44
99
DI−34
− DIAGNOSTICSENGINE (3RZ−FE)
1996 TOYOTA T100 (RM449U)
INSPECTION PROCEDURE
HINT:
If DTCs P0110, P0115 and P0120 are output simultaneously, E2 (Sensor Ground) may be open.
1 Connect OBD II scan tool or TOYOTA hand−held tester and read value of engine
coolant temp.
PREPARATION:
(a) Connect the OBD II scan tool or TOYOTA hand−held tester to the DLC3.
(b) Turn the ignition switch ON and push the OBD II scan tool or TOYOTA hand−held tester main switch
ON.
CHECK:
Read temp. value on the OBD II scan tool or TOYOTA hand−held tester.
OK:
Same as actual engine coolant temp.
HINT:
If there is open circuit, OBD II scan tool or TOYOTA hand−held tester indicates − 40°C (− 40°F).
If there is open circuit, OBD II scan tool or TOYOTA handheld tester indicates 140°C (284°F) or more.
NG − 40°C (− 40°F) ... Go to step 2.
140°C (284°F) or more ... Go to step 4.
OK
Check for intermittent problems (See page
DI−3).
2 Check for open in harness or ECM.
PREPARATION:
(a) Disconnect the engine coolant temp. sensor connector.
(b) Connect the sensor wire harness terminals together.
(c) Turn the ignition switch ON.
CHECK:
Read temp. value on the OBD II scan tool or TOYOTA hand−
held tester.
OK:
Temp. value: 140°C (284°F) or more
OK Confirm good connection at sensor.
If OK, replace engine coolant temp. sensor.
NG

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P19553
P19699
P19674
A00050
12 ON
4
THW E2
THW E2ECM(M/T) (A/T)THW
E25 V
E1 E6
For M/T
For A/T
E6E6
Engine Coolant
Temp. Sensor
E694
9
− DIAGNOSTICSENGINE (3RZ−FE)
DI−35
1996 TOYOTA T100 (RM449U)
3 Check for open in harness or ECM.
PREPARATION:
(a) Remove the right cowl side trim (See page MF−50).
(b) Connect between terminals THW and E2 of the ECM con-
nector.
HINT:
The engine coolant temp. sensor connector is disconnected.
Before checking, do a visual and contact pressure check for the
ECM connector (See page DI−3).
(c) Turn the ignition switch ON.
CHECK:
Read temp. value on the OBD II scan tool or TOYOTA hand−
held tester.
OK:
Temp. value: 140°C (284°F) or more
OK Open in harness between terminals E2 or THW,
repair or replace harness.
NG
Confirm good connection at ECM.
If OK, replace ECM.

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P19554
A00048
12 ON
4ECM
THW
E25 V
E1 E6 E6
Engine Coolant
Temp. Sensor
4
9
E6 E69
(M/T)(A/T)
DI−36
− DIAGNOSTICSENGINE (3RZ−FE)
1996 TOYOTA T100 (RM449U)
4 Check for open in harness or ECM.
PREPARATION:
(a) Disconnect the engine coolant temp. sensor connector.
(b) Turn the ignition switch ON.
CHECK:
Read temp. value on the OBD II scan tool or TOYOTA hand−
held tester.
OK:
Temp. value: − 40°C (− 40°F)
OK Replace engine coolant temp. sensor.
NG

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FI7056
P19785
P19798
A00049
ON
THW
E2
For M/T
For A/T Engine Coolant
Temp. Sensor
E15 V
E6 Connector
E6 Connector
ECM
− DIAGNOSTICSENGINE (3RZ−FE)
DI−37
1996 TOYOTA T100 (RM449U)
5 Check for short in harness or ECM.
PREPARATION:
(a) Remove the right cowl side trim (See page MF−50).
(b) Disconnect the E6 connector of the ECM.
HINT:
The engine coolant temp. sensor connector is disconnected.
(c) Turn the ignition switch ON.
CHECK:
Read temp. value on the OBD II scan tool or TOYOTA hand−
held tester.
OK:
Temp. value: − 40°C (− 40°F)
OK Repair or replace harness or connector.
NG
Check and replace ECM (See page IN−26).

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Throttle Position Sensor
G−Y
11
2
3
4Y−L
BR−B Y1
E6 E6
E6 E6
E6 E6
E6 E611 1 0
12
11
995 V
B+ VCC
VTA
IDL
E2
E1 (M/T) (A/T)
* Closed Throttle
Position Switch *
FI7052
DI−40
− DIAGNOSTICSENGINE (3RZ−FE)
1996 TOYOTA T100 (RM449U)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
If DTCs P0110, P0115 and P0120 are output simultaneously, E2 (Sensor Ground) may be open.
1 Connect OBD II scan tool or TOYOTA hand−held tester and read the throttle
valve opening percentage.
PREPARATION:
(a) Connect the OBD II scan tool or TOYOTA hand−held tester to DLC3.
(b) Turn the ignition switch ON and push the OBD II scan tool or TOYOTA hand−held tester main switch
ON.
CHECK:
Read the throttle valve opening percentage.
OK:
Throttle valveThrottle valve opening position
expressed as percentage
Fully openApprox. 75 %
Fully closedApprox. 10 %
OK Check for intermittent problems (See page
DI−3).

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P23808
A00051
ON
1 (+)
P23809
Throttle Position
Sensor
1
2
4
− DIAGNOSTICSENGINE (3RZ−FE)
DI−41
1996 TOYOTA T100 (RM449U)
NG
2 Check voltage between terminal 1 of wire harness side connector and body
ground.
PREPARATION:
(a) Disconnect the throttle position sensor connector.
(b) Turn the ignition switch ON.
CHECK:
Measure voltage between terminals 1 of wire harness side con-
nector and body ground.
OK:
Voltage: 4.5 − 5.5 V
NG Go to step 5.
OK
3 Check throttle position sensor.
PREPARATION:
Disconnect the throttle position sensor connector.
CHECK:
Measure voltage between terminals 1, 2 and 4 of throttle posi-
tion sensor.
OK:
TerminalsThrottle valveResistance
1 − 4⎯2.5 − 5.9 kΩ
2 − 4Fully closed0.2 − 5.7 kΩ
2 − 4Fully open2.0 − 10.2 kΩ
NG Replace throttle position sensor.
OK

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P23810
P23811
A00052
For M/TON
For A/TVTA (+) E2 (−)
VTA (+) E2 (−)
BE6653
P23812
P23813A00028
For M/TON
For A/TVCC (+)
VCC (+) E2 (−) E2 (−)
DI−42
− DIAGNOSTICSENGINE (3RZ−FE)
1996 TOYOTA T100 (RM449U)
4 Check voltage between terminals VTA and E2 of ECM connector.
PREPARATION:
(a) Remove the right cowl side trim (See page MF−50).
(b) Turn the ignition switch ON.
CHECK:
Measure voltage between terminals VTA and E2 of ECM con-
nector.
OK:
Throttle valveVoltage
Fully closed0.3 − 0.8 V
Fully open2.7 − 5.2 V
NG Check for open and short in harness and
connector between ECM and throttle position
sensor (VTA line) (See page IN−26).
OK
Check and replace ECM (See page IN−26).
5 Check voltage between terminals VCC and E2 of ECM connector.
PREPARATION:
(a) Remove the right cowl side trim (See page MF−50).
(b) Turn the ignition switch ON.
CHECK:
Measure voltage between terminals VCC and E2 of ECM con-
nector.
OK:
Voltage: 4.5 − 5.5 V
NG Check and replace ECM (See page IN−26).
OK
Check for open in harness and connector be-
tween ECM and sensor (VCC line) (See page
IN−26).