egr temp sensor TOYOTA LAND CRUISER 1996 J80 User Guide

P24665
−
DIAGNOSTICS ENGINE
DI−79
1996 LAND CRUISER (RM451U)
9 Check resistance of EGR gas temp. sensor (See page SF−63).
PREPARATION:
(a) Disconnect EGR gas temp. sensor connector.
(b) Start the engine and warm it up.
(c) Disconnect VSV connector for EGR.
(d) Race the engine at 4,000 rpm or 3 mins.
CHECK:
Measure the resistance of the EGR gas temp. sensor while rac-
ing the engine at 4,000 rpm.
OK:
Resistance of EGR gas temp. sensor after 3 mins.:
4.3 kΩ or less
HINT:
At 20° C (68° F): 188.6 − 439.0 kΩ for resistance.
NG Replace EGR gas temp. sensor.
OK
Check and replace ECM (See page IN−28 ).
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DI−80
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
DTC P0402 Exhaust Gas Recirculation Flow Excessive Detected
CIRCUIT DESCRIPTION
Refer to DTC P0401 (Exhaust Gas Recirculation Flow Insufficient Detected) on page DI−69.
DTC No.DTC Detecting ConditionTrouble Area
P0402
EGR gas temp. sensor value is high during EGR cut −off when
engine is cold (Race engine at about 4,000 rpm without load so
that vacuum is applied to port E)
(2 trip detection logic) EGR valve stuck open
 EGR VSV open malfunction
 Open in VSV circuit for EGR
 Short in EGR gas temp. sensor circuit
 ECM
EGR valve is always open (2 trip detection logic)
Refer to DTC P0401 (Exhaust Gas Recirculation Flow Insufficient Detected) for the System Check Driving
Pattern and Wiring Diagram.
INSPECTION PROCEDURE
TOYOTA hand −held tester
1 Connect the TOYOTA hand −held tester and read EGR gas temp. value.
PREPARATION:
(a) Remove the fuse cover on the instrument panel.
(b) Connect the TOYOTA hand−held tester to the DLC3.
(c) Turn 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.: 150° C (302°F) or less (Not immediately after driving)
HINT:
If there is a short circuit, the TOYOTA hand−held tester indicates Approx. 157.5°C (315.5°F).
OK Go to step 4.
NG
DI5PL−02
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A00174
ON
EGR Gas Temp.
Sensor 1
2 ECM
5V
E2
19
9
E4
E5 THG
BE6653
FI7054
A00175
ON
EGR Gas Temp.
Sensor ECM
5V
E2
E4 connector
THG
BE6653
FI7099
P22261
−
DIAGNOSTICS ENGINE
DI−81
1996 LAND CRUISER (RM451U)
2 Check for short in harness and ECM.
PREPARATION:
Disconnect the EGR gas temp. sensor connector.
CHECK:
Read EGR gas temp. on the TOYOTA hand−held tester.
OK:
EGR gas temp.: 3.1° C (37.6°F)
OK Replace EGR gas temp. sensor.
NG
3 Check for short in harness or ECM.
PREPARATION:
(a) Remove the instrument panel speaker No.1 panel. (See page SF−65 ).
(b) Disconnect the E4 connector of ECM.
HINT:
EGR gas temp. sensor is disconnected.
CHECK:
Read EGR gas temp. on the TOYOTA hand−held tester.
OK:
EGR gas temp.: 3.1° C (37.6°F)
OK Repair or replace harness or connector.
NG
Check and replace ECM (See page IN−28 ).
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P24665
DI−82
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
4 Check the VSV for EGR (See page DI−69 ).
OK Check EGR valve (See page EC−11).
NG
5 Check operation of the VSV for EGR (See page SF−60).
NG Replace VSV for EGR.
OK
Check for short in harness and connector
between VSV and ECM (See page IN−28).
OBD II scan tool (excluding TOYOTA hand −held tester)
1 Check resistance of EGR gas temp. sensor (See page DI−105).
PREPARATION:
Disconnect EGR gas temp. sensor connector.
CHECK:
Measure resistance between terminals of EGR gas temp. sen-
sor connector.
OK:
Resistance: 2.5 k Ω or more
(Not immediately after driving)
HINT:
If there is short circuit, ohmmeter indicates 200 Ω or less.
NG Replace EGR gas temp. sensor.
OK
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−
DIAGNOSTICS ENGINE
DI−83
1996 LAND CRUISER (RM451U)
2 Check for short in harness and connector between EGR gas temp. sensor and
ECM (See page IN−28 ).
NG Repair or replace harness or connector.
OK
3 Check the VSV for EGR (See page DI−69 , step 5).
OK Check EGR valve (See page EC−11).
NG
4 Check operation of the VSV for EGR (See page SF−60).
NG Replace VSV for EGR.
OK
5 Check for short in harness and connector between VSV and ECM (See page IN−28 ).
NG Repair or replace harness or connector.
OK
Check and replace ECM (See page IN−28 ).
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EM−30
−
ENGINE MECHANICAL CYLINDER HEAD
1996 LAND CRUISER (RM451U)
(b) Disconnect the connectors.
(1) Disconnect the knock sensor connector.
(2) Disconnect the oil level sensor connector.
(3) Disconnect the 2 connectors from the transmission.
(4) Disconnect the starter connector.
(c) Disconnect the 2 heated oxygen sensor connectors.
(d) Disconnect the PNP switch connector.
(e) Remove the 2 bolts and disconnect the engine wire from the intake manifold and cylinder block.
(f) Disconnect the PCV hose from the PCV valve.
(g) Remove the bolt holding the engine wire to the intake manifold.
(h) Disconnect the connectors. (1) Disconnect the connector for the emission controlvalve set assembly.
(2) Disconnect the 3 injector connectors.
(i) Disconnect the engine wire clamp.
(j) Disconnect the engine wire clamp.
(k) Disconnect the connectors.
(1) Disconnect the 3 injector connectors.
(2) Disconnect the EGR gas temp. sensor connector.
(l) Disconnect the clamp of the No. 6 injector wire from the bracket.
(m) Disconnect the engine wire from the cylinder head and in-
take manifold.
25. DISCONNECT NO. 2 WATER BYPASS PIPE
Remove the 3 bolts, and disconnect the bypass pipe from the
cylinder head.
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−
ENGINE MECHANICAL CYLINDER HEAD
EM−61
1996 LAND CRUISER (RM451U)
14. INSTALL HEATER PIPE
Install a new gasket, the heater pipe and ground cable with the
2 bolts and 2 nuts.
Torque:
20 N·m (200 kgf·cm, 14 ft·lbf) for bolt:
21 N·m (210 kgf·cm, 15 ft·lbf) for nut
15. INSTALL NO. 1 AND NO. 2 EXHAUST MANIFOLDS
(a) Install 2 new gaskets, No. 1 exhaust manifold and No. 2
exhaust manifold with the 13 nuts.
Torque: 39 N·m (400 kgf·cm, 29 ft·lbf)
(b) Install the No. 1 heat insulator and No. 2 heat insulator with the 6 bolts.
Torque: 19 N·m (195 kgf·cm, 14 ft·lbf)
16. INSTALL FRONT EXHAUST PIPE
(a) Install 2 new gaskets and the front exhaust pipe with the 4 nuts.
Torque: 63 N·m (630 kgf·cm, 46 ft·lbf)
(b) Install the No. 1 support bracket with the 2 bolts. Torque: 24 N·m (240 kgf·cm, 17 ft·lbf)
(c) Connect the clamp and tighten the clamp bolt.
Torque: 19.5 N·m (195 kgf·cm, 14 ft·lbf)
(d) Connect the front exhaust pipe to the rear TWC with a new gasket, 2 bolts and 2 nuts.
Torque: 46 N·m (470 kgf·cm, 34 ft·lbf)
17. CONNECT NO. 2 WATER BYPASS PIPE
Connect the bypass pipe to the cylinder head with the 3 bolts.
Torque: 20 N·m (200 kgf·cm, 14 ft·lbf)
18. CONNECT ENGINE WIRE
(a) Place the engine wire on the intake manifold.
(b) Connect the connectors. (1) Connect the 3 injector connectors.
(2) Connect the EGR gas temp. sensor connector.
(c) Connect the clamp of the No.6 injector wire to the bracket.
(d) Connect the engine wire clamp.
(e) Connect the engine wire clamp.
(f) Connect the connectors. (1) Connect the connector for the emission control
valve set assembly.
(2) Connect the 3 injector connectors.
(g) Install the bolt holding the engine wire to the intake man- ifold.
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SF1EN−01
SF−26
−
SFI INJECTOR
1996 LAND CRUISER (RM451U)
REMOVAL
1. DRAIN ENGINE COOLANT
2. DISCONNECT CRUISE CONTROL ACTUATOR CABLE
3. DISCONNECT ACCELERATOR CABLE
4. DISCONNECT THROTTLE CABLE
5. DISCONNECT NO.2 PCV HOSE
6. DISCONNECT AIR CLEANER HOSE
7. REMOVE EGR VACUUM MODULATOR AND VALVE (See page EC−10 )
8. REMOVE BOLT HOLDING HEATER INLET PIPE AND AIR INTAKE CHAMBER
9. DISCONNECT NO.1 PCV HOSE
10. DISCONNECT VACUUM SENSING HOSE
11. DISCONNECT NO.2 WATER BYPASS HOSE
12. DISCONNECT EVAP HOSE
13. DISCONNECT BRAKE BOOSTER HOSE
14. DISCONNECT THROTTLE POSITION SENSOR CON- NECTOR
15. DISCONNECT IDLE AIR CONTROL VALVE CONNEC-
TOR
16. DISCONNECT CONNECTOR FOR EMISSION CON- TROL VALVE SET ASSEMBLY
17. DISCONNECT EGR GAS TEMP. SENSOR CONNEC-
TOR
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SF−34
−
SFI INJECTOR
1996 LAND CRUISER (RM451U)
7. INSTALL INTAKE MANIFOLD STAY
Install the intake manifold stay with the 2 bolts.
Torque: 36 N·m (360 kgf·cm, 26 ft·lbf)
8. CONNECT GROUND STRAP
9. INSTALL ENGINE OIL DIPSTICK
10. CONNECT PS RESERVOIR TANK
Connect the reservoir tank with the 3 bolts. Torque: 18 N·m (185 kgf·cm, 13 ft·lbf)
11. CONNECT EGR GAS TEMP. SENSOR CONNECTOR
12. CONNECT CONNECTOR FOR EMISSION CONTROL VALVE SET ASSEMBLY
13. CONNECT IDLE AIR CONTROL VALVE CONNECTOR
14. CONNECT THROTTLE POSITION SENSOR CONNEC- TOR
15. CONNECT BRAKE BOOSTER HOSE
16. CONNECT EVAP HOSE
17. CONNECT NO.2 WATER BYPASS HOSE
18. CONNECT VACUUM SENSING HOSE
19. CONNECT NO.1 PCV HOSE
20. INSTALL BOLT HOLDING HEATER INLET PIPE AND AIR INTAKE CHAMBER
Torque: 20 N·m (200 kgf·cm, 14 ft·lbf)
21. INSTALL EGR VALVE AND VACUUM MODULATOR (See page EC−10 )
22. CONNECT THROTTLE CABLE
23. CONNECT ACCELERATOR CABLE
24. CONNECT CRUISE CONTROL ACTUATOR CABLE
25. CONNECT AIR CLEANER HOSE
26. CONNECT NO.2 PCV HOSE
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SF1FA−01
FI6320
Ohmmeter
Oil
−
SFI EXHAUST GAS RECIRCULATION (EGR) GAS
TEMPERATURE SENSORSF−63
691
Author: Date:
1996 LAND CRUISER (RM451U)
EXHAUST GAS RECIRCULATION
(EGR) GAS TEMPERATURE
SENSOR
INSPECTION
1. REMOVE EGR GAS TEMPERATURE SENSOR
2. INSPECT EGR GAS TEMPERATURE SENSOR
Using an ohmmeter, measure the resistance between the ter-
minals.
TemperatureResistance
50 °C (122° F)64 − 97 kΩ
100°C (212° F)11 − 16 kΩ
150 °C (302° F)2 − 4 kΩ
If the resistance is not as specified, replace the sensor.
3. REINSTALL EGR GAS TEMPERATURE SENSOR
Torque: 20 N·m (200 kgf·cm, 14 ft·lbf)
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