Page 615 of 969
A86342
EVAP
Service Port Vacuum
Surge TankVSV
for EVAP
Fuel Tank Cap
Assy
Vapor Pressure Sensor
Assy
Fuel Tank Assy
Charcoal Canister Assy
VSV for CCVCharcoal Canister Filter
Sub-assyAir Fuel Ratio Sensor
(Bank 1 Sensor 1)
Heated Oxygen Sensor
(Bank 1 Sensor 2)
Heated Oxygen Sensor
(Bank 2 Sensor 2)
Air Fuel Ratio Sensor
(Bank 2 Sensor 1) Air Cleaner Assy
Ventilation Valve Assy
Vent Line
Air Inlet Line Purge Line
12-2
- EMISSION CONTROLEMISSION CONTROL SYSTEM (3MZ-FE)
2063 Author: Date:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
Page 616 of 969
120C1-02
G37992
Voltmeter E9 E8
A86347DLC3
Hand-held Tester
A86385
Lean
14.7 3.3 V
RichAir
Fuel
Ratio
Time Keep the engine speed
- EMISSION CONTROLEMISSION CONTROL SYSTEM (3MZ-FE)
12-3
2064 Author: Date:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
ON-VEHICLE INSPECTION
1. INSPECT AIR FUEL RATIO COMPENSATION SYSTEM
(a) Inspect the voltage.
(1) Turn the ignition switch ON.
(2) Using a voltmeter, measure the voltage between
the terminals of the ECM.
Standard:
Tester ConnectionSpecified Condition
A1A+ (E9-22) - E1 (E8-1)3.3 V
A1A- (E9-30) - E1 (E8-1)3.0 V
A2A+ (E9-23) - E1 (E8-1)3.3 V
A2A- (E9-31) - E1 (E8-1)3.0 V
CAUTION:
Connect the test leads from the back side of the ECM con-
nector to the terminals.
HINT:
The voltage between the terminals of the ECM is constant re-
gardless of the voltage output from the air fuel ratio sensor (A/F
sensor).
(b) Check the operation.
(1) Connect the hand-held tester to the DLC3.
(2) Enter ºDIAGNOSIS/ENHANCED OBD II/DATA
LISTº, then select ºAFS B1 S1º and ºAFS B2 S1º to
display the monitor.
(3) Warm up the A/F sensor with the engine speed at
2,500 rpm for approximately 2 minutes.
(4) Keep the engine speed at 2,500 rpm, then confirm
that the waveform of ºAFS B1 S1º and ºAFS B2 S1º
are similar as shown in the illustration.
HINT:
The waveform in the illustration is a sample.
Only the hand-held tester displays the waveform of the
A/F sensor.
(c) Confirm that the display of ºDATA LISTº - ºO2S B1 S2º
and ºO2S B2 S2º fluctuates up and down between 0 V
and 1 V with the engine speed at 2,500 rpm.
Page 621 of 969
A86352
Air
A86344
VoltmeterE10 12-8
- EMISSION CONTROLEMISSION CONTROL SYSTEM (3MZ-FE)
2069 Author: Date:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
(8) Remove the vinyl or plastic bag from the fuel tank
to filler pipe port, then check that the pressure
drops.
If the pressure does not drop, replace the fuel tank.
(9) Drain fuel from the fuel tank.
(10) Reinstall the fuel tank vent hose to the fuel tank (see
page 11-28).
(11) Reinstall the fuel tank (see page 11-28).
7. CHECK AIR INLET LINE
(a) Disconnect the fuel tank vent hose (see page 12-18).
(b) Check that there is ventilation in fuel tank vent hose.
If necessary, replace the charcoal canister filter.
(c) Reconnect the fuel tank vent hose (see page 12-18).
8. INSPECT VAPOR PRESSURE SENSOR
(a) Inspect the voltage (power source).
(1) Turn the ignition switch ON.
(2) Using a voltmeter, measure the voltage between
the terminals of the ECM.
Voltage:
Tester ConnectionSpecified Condition
VC (E10-18) - E2 (E10-28)4.5 to 5.5 V
CAUTION:
Connect the test leads from the back side of the ECM con-
nector to the terminals.
(3) Turn the ignition switch OFF.
Page 627 of 969
A86293Battery Air
E
F
A86294
Ohmmeter
A86295
Ohmmeter
Bank 1 Sensor 2 Bank 2 Sensor 2 12-14
- EMISSION CONTROLEMISSION CONTROL SYSTEM (3MZ-FE)
2075 Author: Date:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
(2) Apply battery voltage across the terminals.
(3) Check that air flows from port E to F.
If the operation is not as specified, replace the vacuum switch-
ing valve No. 1.
5. INSPECT AIR FUEL RATIO SENSOR
(a) Inspect the resistance.
(1) Using an ohmmeter, measure the resistance be-
tween the terminals.
Standard:
Tester ConnectionSpecified Condition
1 (HT) - 2 (+B)1.8 to 3.4 W at 20C (68F)
If the resistance is not as specified, replace the air fuel ratio sen-
sor.
(b) Check the continuity.
(1) Using an ohmmeter, check that there is no continu-
ity between terminals 2 (+B) and 4 (AF-).
If there is continuity, replace the air fuel ratio sensor.
6. INSPECT HEATED OXYGEN SENSOR
(a) Inspect the resistance.
(1) Using an ohmmeter, measure the resistance be-
tween the terminals.
Standard:
Tester ConnectionSpecified Condition
1 (HT) - 2 (+B)11 to 16 W at 20C (68F)
If the resistance is not as specified, replace the heated oxygen
sensor.
(b) Check the continuity.
(1) Using an ohmmeter, check that there is no continu-
ity between terminals 1 (HT) and 4 (E).
If there is continuity, replace the heated oxygen sensor.
Page 628 of 969
A84683
OhmmeterBattery
- EMISSION CONTROLEMISSION CONTROL SYSTEM (3MZ-FE)
12-15
2076 Author: Date:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
7. INSPECT AIR FUEL RATIO SENSOR HEATER RELAY
(a) Inspect the resistance.
(1) Using an ohmmeter, measure the resistance be-
tween the terminals.
Standard:
Tester ConnectionSpecified Condition
3 - 510 kW or higher
3 - 5Below 1W
(Apply battery voltage to terminals 1 and 2
If the result is not as specified, replace the air fuel ratio sensor
heater relay.
Page 633 of 969
120BV-02
A91017
Nylon Tube Fuel Tube Joint
O-ring
Tube Joint Clip Fuel Suction Plate
A79488
Tube Joint Clip
A79489
A79491
Cover
Tube Joint Clip
12-20
- EMISSION CONTROLVAPOR PRESSURE SENSOR ASSY (3MZ-FE)
2081 Author: Date:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
VAPOR PRESSURE SENSOR ASSY (3MZ-FE)
REPLACEMENT
1. DISCHARGE FUEL SYSTEM PRESSURE (See page 11-1)
2. DISCONNECT ENGINE WIRE NO. 3 (BATTERY NEGATIVE TERMINAL)
3. REMOVE REAR SEAT CUSHION ASSY (See page 72-39)
4. REMOVE REAR FLOOR SERVICE HOLE COVER (See page 11-20)
5. DISCONNECT FUEL PUMP TUBE SUB-ASSY
(a) Remove the tube joint clip, then pull out the fuel pump
tube.
NOTICE:
Check around the quick connector for dirt or mud be-
fore this operation. Remove the dirt if necessary.
Be careful of mud because the quick connector has
an O-ring which seals the pipe and quick connector
that can be contaminated.
Do not use any tools in this operation.
Do not bend or twist the nylon tube. Protect the quick
connector by covering it with a vinyl or plastic bag.
When the pipe and quick connector are stuck, push
and pull the quick connector to release. Pull the quick
connector carefully.
6. REMOVE FUEL TANK VENT TUBE SET PLATE
(a) Remove the 8 bolts, then remove the fuel tank vent tube
set plate.
7. REMOVE VAPOR PRESSURE SENSOR ASSY
(a) Remove the cover.
(b) Remove the tube joint clip, then pull out the vapor pres-
sure sensor.
Page 634 of 969
A86272
Cover
Tube Joint Clip
A79489Mark
A81595
Tube Joint ClipCollar
- EMISSION CONTROLVAPOR PRESSURE SENSOR ASSY (3MZ-FE)
12-21
2082 Author: Date:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
8. INSTALL VAPOR PRESSURE SENSOR ASSY
(a) Install the vapor pressure sensor with the tube joint clip.
NOTICE:
Check the connected part for scratch or foreign ob-
jects.
Check that the vapor pressure sensor is inserted se-
curely.
Check that the tube joint clip is on the collar of the va-
por pressure sensor.
After installing the tube joint clip, check that the vapor
pressure sensor has not been pulled off.
(b) Install the cover.
9. INSTALL FUEL TANK VENT TUBE SET PLATE
(a) Align the mark of the fuel tank vent tube set plate with the
fuel suction tube w/ pump & gauge.
(b) Install the fuel tank vent tube set plate with the 8 bolts.
Torque: 5.9 NVm (60 kgfVcm, 52 in.Vlbf)
10. CONNECT FUEL PUMP TUBE SUB-ASSY
(a) Install the fuel pump tube with the tube joint clip.
NOTICE:
Check the connected part for scratch or foreign ob-
jects.
Check that the fuel tube joint is inserted securely.
Check that the tube joint clip is on the collar of the fuel
tube joint.
After installing the tube joint clip, check that the fuel
tube joint has not been pulled off.
11. CONNECT ENGINE WIRE NO. 3 (BATTERY NEGATIVE TERMINAL)
Torque: 5.4 NVm (55 kgfVcm, 48 in.Vlbf)
12. CHECK FOR FUEL LEAKS (See page 11-5)
13. INSTALL REAR FLOOR SERVICE HOLE COVER (See page 11-20)
14. INSTALL REAR SEAT CUSHION ASSY
15. SYSTEM INITIALIZATION (See page 19-15)
Page 635 of 969
120BY-01
A86340
(a)
(b)
(b)(b)
A86354
SST
A86354
SST
12-22
- EMISSION CONTROLAIR FUEL RATIO SENSOR (3MZ-FE (RH BANK))
2083 Author: Date:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
AIR FUEL RATIO SENSOR (3MZ-FE (RH BANK))
REPLACEMENT
1. DISCONNECT ENGINE WIRE NO. 3 (BATTERY NEGATIVE TERMINAL)
2. REMOVE EXHAUST PIPE NO.1 SUPPORT BRACKET FRONT (See page 15-2)
3. REMOVE EXHAUST PIPE NO.1 SUPPORT BRACKET REAR (See page 15-2)
4. REMOVE EXHAUST PIPE ASSY FRONT (See page 15-2)
5. REMOVE EXHAUST MANIFOLD HEAT INSULATOR
NO.1
(a) Disconnect the air fuel ratio sensor connector.
(b) Remove the 3 bolts, then remove the exhaust manifold
heat insulator No. 1.
6. REMOVE AIR FUEL RATIO SENSOR
(a) Using SST, remove the air fuel ratio sensor.
SST 09224-00010
7. INSTALL AIR FUEL RATIO SENSOR
(a) Using SST, install the air fuel ratio sensor.
SST 09224-00010
Torque: 44 NVm (449 kgfVcm, 32 ftVlbf)
8. INSTALL EXHAUST MANIFOLD HEAT INSULATOR NO.1
Torque: 8.5 NVm (87 kgfVcm, 75 in.Vlbf)
9. INSTALL EXHAUST PIPE ASSY FRONT (See page 15-2)
10. INSTALL EXHAUST PIPE NO.1 SUPPORT BRACKET REAR (See page 15-2)
11. INSTALL EXHAUST PIPE NO.1 SUPPORT BRACKET FRONT (See page 15-2)
12. CONNECT ENGINE WIRE NO. 3 (BATTERY NEGATIVE TERMINAL)
Torque: 5.4 NVm (55 kgfVcm, 48 in.Vlbf)
13. CHECK FOR EXHAUST GAS LEAKS
14. SYSTEM INITIALIZATION (See page 19-15)
