Page 1185 of 3000
EC–302GR-FE EMISSION CONTROL – AIR FUEL RATIO SENSOR (for 4WD)
EC
(d) Install the front exhaust pipe assembly with the 2
nuts and 2 bolts.
Torque: Bolt
43 N*m (440 kgf*cm, 32 ft.*lbf)
Nut
62 N*m (632 kgf*cm, 46 ft.*lbf)
(e) Install the center exhaust pipe assembly with the 2
compression springs and 2 bolts.
Torque: 43 N*m (438 kgf*cm, 32 ft.*lbf)
(f) Attach the clip.
(g) Connect the heated oxygen sensor (for Bank 1
Sensor 2) connector.
5. CONNECT CABLE TO NEGATIVE BATTERY
TERMINAL
6. INSPECT FOR EXHAUST GAS LEAK
A163387
A162949
A163447
Page 1186 of 3000

2GR-FE EMISSION CONTROL – HEATED OXYGEN SENSOR (for 4WD)EC–39
EC
INSPECTION
1. INSPECT HEATED OXYGEN SENSOR (for Bank 1
Sensor 2)
(a) Measure the resistance of the sensor.
Standard resistance
If the resistance is not as specified, replace the
sensor.
2. HEATED OXYGEN SENSOR (for Bank 2 Sensor 2)
(a) Measure the resistance of the sensor.
Standard resistance
If the resistance is not as specified, replace the
sensor.
INSTALLATION
1. INSTALL HEATED OXYGEN SENSOR (for Bank 2
Sensor 2)
(a) Using SST, install the heated oxygen sensor to the
front exhaust pipe.
SST 09224-00010
Torque: 40 N*m (408 kgf*cm, 30 ft.*lbf) for use
with SST
44 N*m (449 kgf*cm, 32 ft.*lbf) for use
without SST
HINT:
• Use a torque wrench with a fulcrum length of 30
cm (11.81 in.).
• Make sure that SST and a wrench are connected
in a straight line.
2. INSTALL FRONT EXHAUST PIPE ASSEMBLY
(a) Install 2 new gaskets to the front exhaust pipe
assembly.
A161881E02
Tester Connection Specified Condition
1 (HT) - 2 (+B) 11 to 16
at 20C (68F)
1 (HT) - 4 (E1) 10 k
or higher
A161881E04
Tester Connection Specified Condition
3 (HT) - 2 (+B) 11 to 16
at 20C (68F)
3 (HT) - 4 (E1) 10 k
or higher
A163271E01
Page 1187 of 3000
EC–402GR-FE EMISSION CONTROL – HEATED OXYGEN SENSOR (for 4WD)
EC
(b) Install the front exhaust pipe assembly with the 2
bolts and 2 nuts.
Torque: Bolt
43 N*m (440 kgf*cm, 32 ft.*lbf)
Nut
62 N*m (632 kgf*cm, 46 ft.*lbf)
(c) Install the No. 1 exhaust pipe support bracket with 2
new nuts.
Torque: 21 N*m (214 kgf*cm, 15 ft.*lbf)
(d) Connect the heated oxygen sensor (for Bank 2
sensor 2) connector.
A163386
A165516
Page 1188 of 3000
2GR-FE EMISSION CONTROL – HEATED OXYGEN SENSOR (for 4WD)EC–41
EC
3. INSTALL HEATED OXYGEN SENSOR (for Bank 1
Sensor 2)
(a) Using SST, install the heated oxygen sensor.
SST 09224-00010
Torque: 40 N*m (408 kgf*cm, 30 ft.*lbf) for use
with SST
44 N*m (449 kgf*cm, 32 ft.*lbf) for use
without SST
(b) Connect the heated oxygen sensor (for Bank 1
Sensor 2) connector.
HINT:
• Use a torque wrench with a fulcrum length of 30
cm (11.81 in.).
• Make sure that SST and a wrench are connected
in a straight line.
4. CONNECT CABLE TO NEGATIVE BATTERY
TERMINAL
5. INSPECT FOR EXHAUST GAS LEAK
A163385E01
Page 1189 of 3000
EC–142GR-FE EMISSION CONTROL – VENTILATION VALVE
EC
ENGINE
2GR-FE EMISSION CONTROL
VENTILATION VALVE
COMPONENTS
A162859E01
Page 1190 of 3000
2GR-FE EMISSION CONTROL – VENTILATION VALVEEC–15
EC
REMOVAL
1. REMOVE V-BANK COVER SUB-ASSEMBLY (See
page EM-28)
2. DISCONNECT VENTILATION HOSE
(a) Disconnect the ventilation hose from the ventilation
valve.
3. REMOVE VENTILATION VALVE
(a) Remove the ventilation valve.
INSPECTION
1. INSPECT VENTILATION VALVE
(a) Install a clean hose to the ventilation valve.
(b) Check the ventilation valve operation.
(1) Blow air into the cylinder head side, and check
that air passes through easily.
NOTICE:
Do not suck air through the valve.
Petroleum substances inside the valve are
hazardous to your health.
(2) Blow air into the intake manifold side, and
check that air passes through with difficulty.
If the result is not as specified, replace the
ventilation valve.
(c) Remove the clean hose from the ventilation valve.
A135715E01
A138519E01
A113429E01
A105281E01
Page 1191 of 3000
2GR-FE EMISSION CONTROL – AIR FUEL RATIO SENSOR (for 2WD)EC–17
EC
ENGINE
2GR-FE EMISSION CONTROL
AIR FUEL RATIO SENSOR (for 2WD)
COMPONENTS
A162935E02
Page 1192 of 3000

EC–182GR-FE EMISSION CONTROL – AIR FUEL RATIO SENSOR (for 2WD)
EC
ON-VEHICLE INSPECTION
HINT:
The type of ignition switch on this model differs according to
the specifications of the vehicle. For the expressions used in
this section, refer to the "EXPRESSIONS OF IGNITION
SWITCH" precaution (See page ES-1).
1. CHECK AIR FUEL RATIO COMPENSATION SYSTEM
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Select the following menu items: Data List / A/FS B1
S1 and O2S B1 S2.
(d) Warm up the A/F sensor with the engine speed at
2500 rpm for approximately 2 minutes.
(e) Keep the engine speed at 2500 rpm and confirm
that the "A/FS B1 S1" and "A/FS BS S1" display is
as shown in the illustration.
HINT:
• The illustration may slightly differ from the display
on the intelligent tester.
• Only the intelligent tester displays the waveform
of the A/F sensor.
• On the tester, select the following menu items:
DIAGNOSIS / ENHANCED OBD II / ACTIVE
TEST / A/F CONTROL.
• The A/F CONTROL operation lowers the fuel
injection volume by 12.5% or increases the
injection volume by 25%.
• The sensors react in accordance with increases
and decreases in the fuel injection volume.
Standard
NOTICE:
The A/F sensor has an output delay of a few
seconds.
(f) Confirm that the "O2S B1 S2" and "A/FS BS S1"
display changes between 0 to 1 V with the engine
speed at 2500 rpm.
OK:
The voltage output oscillates more than 8
times in 10 seconds.
NOTICE:
• Perform the check immediately after warming
the engine up.
• If the voltage variation could not be verified,
warm up the A/F sensor again. If it could not
be verified even after warming up the sensor
again, check for DTCs (See page ES-39).
A111996E08
Tester Display
(Sensor)Injection Volume Status Voltage
AFS B1 S1
(A/F)+25% Rich Less than 3.0
-12.5% Lean More than 3.35
AFS B2 S1
(A/F)+25% Rich Less than 3.0
-12.5% Lean More than 3.35