1996 TOYOTA T100 engine

Downloaded from www.Manualslib.com manuals search engine S06906
(3)(5)
(4)(6)
(2)
(1)
Warm up IG SW OFFIding Vehicle Speed
70 − 90 km/h
(43 − 56 mph)
3 − 5 min.3 − 5 min. 2 min. 2 min.
Time
− DIAGNOSTICSENGINE (3RZ−FE)
DI−73
1996 TOYOTA T100 (RM449U)
SYSTEM CHECK DRIVING PATTERN
(1) Connect the OBD II scan tool or TOYOTA hand−held tester to the DLC3.
(2) Start and warm up the engine with all the accessories switched OFF.
(3) Run the vehicle at 70 − 90 km/h (43 − 56 mph) for 3 min. or more.
(4) Idle the engine for about 2 min.
(5) Do steps (3) and (4) again.
(6) Check the ”READINESS TESTS” mode on the OBD II scan tool or TOYOTA hand−held tester.
If ”COMPL” is displayed and the MIL does not light up, the system is normal.
If ”INCMPL” is displayed and the MIL does not light up, run the vehicle step (5) from somes times and check
it.
HINT:
”INCMPL” is displayed when either condition (a) or (b) exists.
(a) The system check is incomplete.
(b) There is a malfunction in the system.
If there is a malfunction in the system, the MIL will light up after steps (2) to (5) above are done.

Downloaded from www.Manualslib.com manuals search engine BE6653
P19555
A00046
EGR Gas Temp.
SensorECM
14 3
99 2
1
E6
E6THG
E25 V
E1 E6
E6
(M/T)(A/T)
ON
DI−74
− DIAGNOSTICSENGINE (3RZ−FE)
1996 TOYOTA T100 (RM449U)
INSPECTION PROCEDURE
TOYOTA hand−held tester:
1 Connect TOYOTA hand−held tester and read value of EGR gas temp. value.
PREPARATION:
(a) Connect the TOYOTA hand−held tester to the DLC3.
(b) Turn the ignition switch ON and push the TOYOTA hand−held tester main switch ON.
CHECK:
Read EGR gas temp. on the TOYOTA hand−held tester.
OK:
EGR gas temp.: 10°C (50°F) or more
HINT:
If there is an open circuit, the TOYOTA hand−held tester indicates 3.1°C (37.6°F).
OK Go to step 4.
NG
2 Check for open in harness or ECM.
PREPARATION:
(a) Disconnect the EGR gas temp. sensor connector.
(b) Connect the sensor wire harness terminals together.
(c) Turn the ignition switch ON.
CHECK:
Read EGR gas temp. on the TOYOTA hand−held tester.
OK:
EGR gas temp.: 159.3°C (318.7°F)
OK Confirm good connection at sensor.
If OK, replace EGR gas temp. sensor.
NG

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P19553
P19705
P19681
A00070
EGR Gas Temp.
SensorECM
14 3
99 2
1
THG
E25 V
E1 E6
(M/T)(A/T)E6E6
E6
ON
THGE2
THGE2 For M/T
For A/T
− DIAGNOSTICSENGINE (3RZ−FE)
DI−75
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 THG and E2 of the ECM con-
nector.
HINT:
The EGR gas temp. sensor connector is disconnected. Before
checking, do a visual check and contact pressure check for the
ECM connector (See page IN−26).
CHECK:
Read EGR gas temp. on the TOYOTA hand−held tester.
OK:
EGR gas temp.: 159.3°C (318.7°F)
OK Open in harness between terminals E2 or THG.
Repair or replace harness.
NG
Confirm connection at ECM.
If OK, replace ECM.
4 Check connection of vacuum hose and EGR hose (See page EC−2).
NG Repair or replace.
OK

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FI7205 FI7206
A00071
ON
System is OFF System is ON
Air
F EF EAir
DI−76
− DIAGNOSTICSENGINE (3RZ−FE)
1996 TOYOTA T100 (RM449U)
5 Check VSV for EGR.
PREPARATION:
Select the ”ACTIVE TEST” mode on the TOYOTA hand−held
tester.
CHECK:
Check operation of VSV when it is operated by the TOYOTA
hand−held tester.
OK:
EGR system is OFF:
Air flows from port E to port F.
EGR system is ON:
Air does not flow from port E to port F.
OK Go to step 7.
NG
6 Check operation of VSV for EGR (See page MF−44).
NG Replace VSV for EGR.
OK
Check for short in harness and connector be-
tween VSV and ECM (See page IN−26).
7 Check EGR vacuum modulator (See page MF−44).
NG Repair or replace.
OK

Downloaded from www.Manualslib.com manuals search engine − DIAGNOSTICSENGINE (3RZ−FE)
DI−77
1996 TOYOTA T100 (RM449U)
8 Check EGR valve (See page MF−44).
NG Repair or replace.
OK
9 Check value of EGR gas temp. sensor.
PREPARATION:
(a) Connect the TOYOTA hand−held tester to the DLC3.
(b) Turn the ignition switch ON and push the TOYOTA hand−held tester main switch ON.
(c) Select the ”ACTIVE TEST” mode on the TOYOTA hand−held tester (EGR system ON).
(d) Race the engine at 4,000 rpm for 3 min.
CHECK:
Measure EGR gas temp. while racing engine at 4,000 rpm.
OK:
EGR gas temp. after 3 min.: 140°C (284°F) or more
NG Replace EGR gas temp. sensor.
OK
Check and replace ECM (See page IN−26).

Downloaded from www.Manualslib.com manuals search engine P24322
EGR Gas Temp. Sensor
Connector
BE6653
P24204
A00072
ON
Wire Harness Side
1 (−)2 (+)
DI−78
− DIAGNOSTICSENGINE (3RZ−FE)
1996 TOYOTA T100 (RM449U)
OBD II scan tool (excluding TOYOTA hand−held tester):
1 Check resistance of EGR gas temp. sensor.
PREPARATION:
Disconnect the EGR gas temp. sensor connector.
CHECK:
Measure resistance between terminals of EGR gas temp. sen-
sor connector.
OK:
Resistance: 600 kΩ or less
HINT:
If there is open circuit, ohmmeter indicates 720 kΩ or more.
NG Check and replace EGR gas temp. sensor (See
page MF−48).
OK
2 Check for open in harness or ECM.
PREPARATION:
(a) Disconnect the EGR gas temp. sensor connector.
(b) Turn the ignition switch ON.
CHECK:
Measure voltage between terminals of EGR gas temp. sensor
wire harness side connector.
OK:
Voltage: 4.5 − 5.5 V
OK Go to step 4.
NG

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P24202
P24203
A00073
THG (+)
THG (+) ON
For M/T
E2 (−)
E2 (−) For A/T
− DIAGNOSTICSENGINE (3RZ−FE)
DI−79
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) Turn the ignition switch ON.
CHECK:
Measure voltage between terminals of THG and E2 of ECM
connector.
HINT:
The EGR gas temp. sensor connector is disconnected.
OK:
Voltage: 4.5 − 5.5 V
OK Open in harness between terminals E2 or THG.
Repair or replace harness.
NG
Confirm connection at ECM.
If OK, replace ECM.
4 Check connection of vacuum hose and EGR hose (See page EC−2).
NG Repair or replace.
OK

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P21086
P21087
FI7205
FI7206
A00074
ON
For M/T
E7 Connector
EGR
For A/TOFF
ON
E7 Connector
OFF
ON
VSV is ONVSV is OFF
AirAir
EFEF
EGR
DI−80
− DIAGNOSTICSENGINE (3RZ−FE)
1996 TOYOTA T100 (RM449U)
5 Check VSV for EGR.
PREPARATION:
(a) Remove the right cowl side trim (See page MF−50).
(b) Disconnect the E7 connector of ECM.
(c) Turn the ignition switch ON.
CHECK:
Check VSV function:
(1) Connect between terminal EGR of ECM and body
ground (ON).
(2) Disconnect between terminal EGR of ECM and
body ground (OFF).
OK:
(1) VSV is ON:
Air flows from port E to port F.
(2) VSV is OFF:
Air does not flow from port E to port F.
OK Go to step 7.
NG
6 Check operation for VSV for EGR (See page MF−44).
NG Replace VSV for EGR.
OK
Check for open in harness and connector be-
tween R/B NO.2 and ECM (See page
IN−26).