Lexus SC300 / Lexus SC400. Service manual — part 490
5. REMOVE EGR GAS TEMPERATURE SENSOR FROM
EGR VALVE ADAPTOR
(a) Mount the EGR valve adaptor in a vise.
(b) Remove the EGR valve adaptor.
(c) Remove
the
connector bracket from the sensor
connector.
6.
INSPECT EGR GAS TEMPERATURE SENSOR
Using an ohmmeter, measure the resistance between the ter-
minals.
Resistance:
69–89 k
at 50
°
C (112
°
F)
12–15 k
at 100
°
C (212
°
F)
2–4 k
at 150
°
C (302
°
F)
If the resistance is not as specified, replace the sensor.
7.
REINSTALL EGR GAS TEMPERATURE SENSOR TO EGR
VALVE ADAPTOR
(a) Mount the EGR valve adaptor in a vise.
(b) Install the EGR gas temperature to the adaptor.
Torque: 20 N
⋅
m (200 kgf
⋅
cm, 14 ft
⋅
lbf)
(c) Install the connector bracket to the sensor connector.
8.
REINSTALL EGR VALVE ADAPTOR
(a) Install a new gasket, the adaptor and connector bracket
with the two bolts, two nuts, EGR valve adaptor and
gasket.
Torque: 18 N
⋅
m (185 kgf
⋅
cm, 13 ft
⋅
lbf)
NOTICE: Do not touch the air intake chamber and adap-
tor surfaces of the gasket with your hand.
(b) Connect the PCV hose to the EGR valve adaptor.
(c) Connect the EGR gas temperature sensor.
FI–104
EFI SYSTEM – Electronic Control System (EGR Gas Temperature Sensor (USA Spec. only))
9. REINSTALL
EGR
VALVE
(a) Place a new gasket on the EGR valve adaptor.
NOTICE:
•
Do not touch the adaptor and EGR valve surfaces of the
gasket with your hand.
•
Align the port holes of the gasket and adaptor. Be careful
of the installation direction.
(b) Install the EGR valve with the two nuts.
Torque: 18 N
⋅
m (185 kgf
⋅
cm, 13 ft
⋅
lbf)
(c) Connect the following hoses to the EGR valve:
(1) Water by–pass hose (from ISC valve)
(2) Water by–pass hose (from rear water by–pass
joint)
(d) Connect the EGR gas temperature sensor.
10. RECONNECT CABLE FROM NEGATIVE TERMINAL OF
BATTERY
11. REFILL WITH ENGINE COOLANT
FI–105
EFI SYSTEM – Electronic Control System (EGR Gas Temperature Sensor (USA Spec. only))
Knock Sensors
FI–106
– Electronic Control System (Knock Sensors)
EFI SYSTEM
COMPONENTS FOR REMOVAL AND INSTALLATION
FI–107
EFI SYSTEM – Electronic Control System (Knock Sensors)
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