Lexus ES300 (2002 year). Service manual - part 371

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DIAGNOSTICS

SFI SYSTEM (1MZ-FE)

05-103

256

13

CHECK VACUUM HOSES (INTAKE MANIFOLD - VSV FOR

 

EVAP, VSV FOR EVAP  -

CHARCOAL CANISTER)

(a)

Check that the vacuum hose is connected correctly.

(b)

Check the vacuum hose for looseness and disconnection.

(c)

Check the vacuum hose for cracks, hole, damage and blockage.

NG

REPAIR OR REPLACE

OK

14

CHECK OPERATION OF VSV(FOR EVAP) (See Step 1)

OK

Go to step 15

NG

CHECK VACUUM HOSES (8,9,10 AND 11 IN CIRCUIT DESCRIPTION)

15

CHECK HARNESS AND CONNECTOR (E.F.I. ECU RELAY - VSV FOR EVAP, VSV
FOR EVPA - ECM)

NG

REPAIR OR REPLACE HARNESS AND
CONNECTOR

OK

16

CHECK VACUUM HOSES(VSV FOR CCV - CHARCOAL CANISTER)

(a)

Check that the vacuum hose is connected correctly.

(b)

Check the vacuum hose for looseness and disconnection.

(c)

Check the vacuum hose for cracks, hole damage, and blockage.

NG

CORRECTLY INSTALL FUEL TANK CAP

OK

17

CHECK OPERATION OF VSV(FOR CCV) (See Step 1)

OK

Go to step 18

NG

REPLACE VSV AND CHARCOAL CANISTER, AND THEN CLEAN VACUUM HOSE

ON

VSV for pressure

Switching Valve

OFF

VSV for EVAP

30 sec.

ON

OFF

ON

OFF

VSV for CCV

Measure

Voltage

A52981

A53769

E2

PTNK

05-104

-

DIAGNOSTICS

SFI SYSTEM (1MZ-FE)

257

18

CHECK HARNESS AND CONNECTOR(E.F.I. ECU RELAY - VSV FOR OCV, VSV
FOR CCV - ECM)

NG

REPAIR OR REPLACE HARNESS AND
CONNECTOR

OK

19

CHECK OPERATION OF VSV(FOR PRESSURE SWITCHING VALVE) 
(See Step 1)

OK

Go to step 20

NG

REPLACE VSV AND CHARCOAL CANISTER, AND THEN CLEAN VACUUM HOSE

20

CHECK HARNESS AND CONNECTOR(E.F.I. ECU RELAY - VSV FOR PRESSURE
SWITCHING VALVE,VSV FOR PRESSURE SWITCHING VALVE  -  ECM)

NG

REPAIR OR REPLACE HARNESS AND
CONNECTOR

OK

21

PERFORM ACTIVE TEST BY OBD II SCAN TOOL OR HAND-HELD TESTER(FUEL
TANK ASSY)

(a)

Connect the hand-held tester to the DLC3.

(b)

Select the ACTIVE TEST mode on the hand-held tester.

(c)

Start the engine.

(d)

The VSV for the CCV is ON by the hand-held tester.

(e)

The VSV for the EVAP and the VSV for the pressure
switching valve are ON by the hand-held tester and hold
the VSV for the EVAP until voltage between terminals
PTNK and E2 becomes 1.2 V.

(f)

Measure the voltage between terminals PTNK and E2 of
the ECM connectors 30 sec. after switching the VSV for
the EVAP and the VSV for the pressure switching valve
from ON to OFF.
Voltage:
When there is no sharp change of the voltage with the
voltage of more or less 1.2 V

NG

REPLACE FUEL TANK ASSY

OK

ON

OFF

ON

OFF

ON

OFF

VSV for pressure

Switching Valve

VSV for EVAP

VSV for CCV

30 sec.

Measure

Voltage

A52982

A53769

E2

PTNK

-

DIAGNOSTICS

SFI SYSTEM (1MZ-FE)

05-105

258

22

PERFORM ACTIVE TEST BY OBD II SCAN TOOL  OR  HAND-HELD
TESTER(CHARCOAL CANISTER ASSY)

(a)

Connect the hand-held tester to the DLC3.

(b)

Select the ACTIVE TEST mode on the hand-held tester.

(c)

Start the engine.

(d)

The VSV for the CCV and the VSV for the pressure
switching valve are ON by the hand-held tester.

(e)

The VSV for the EVAP is ON by the hand-held tester and
hold the VSV for the EVAP until voltage between termi-
nals PTNK and E2 becomes 1.2 V.

(f)

Measure the voltage between terminals PTNK and E2 of
the ECM connectors 30 sec. after switching the VSV for
the EVAP from ON to OFF.
Voltage:
When there is no sharp change of the voltage with the
voltage of more or less 1.2 V

NG

REPLACE CHARCOAL CANISTER ASSY

OK

23

CHECK CHARCOAL CANISTER ASSY (See page 

12-6

)

NG

REPLACE CHARCOAL CANISTER ASSY

OK

24

CHECK FUEL TANK OVER FILL CHECK VALVE

NG

REPLACE VSV AND CHARCOAL CANISTER,
AND THEN CLEAN VACUUM HOSE

OK

REPLACE CHARCOAL CANISTER ASSY

OBDII scan tool (excluding Hand-held Tester):

1

CHECK FOR EVAPORATIVE EMISSIONS LEAK

NG

REPAIR OR REPLACE

OK

05-106

-

DIAGNOSTICS

SFI SYSTEM (1MZ-FE)

259

2

INSPECT FUEL TANK CAP ASSY(TOYOTA GENUINE PARTS)

NG

REPLACE TO TOYOTA GENUINE PARTS

OK

3

CHECK THAT FUEL TANK CAP IS CORRECTLY INSTALLED

NG

CORRECTLY INSTALL FUEL TANK CAP

OK

4

INSPECT FUEL TANK CAP ASSY (See page 

12-6

)

NG

REPLACE FUEL TANK CAP ASSY

OK

5

INSPECT FUEL TANK INLET PIPE SUB-ASSY(FOR DAMAGE)

(a)

Remove the fuel tank cap.

(b)

Visually inspect the fuel inlet pipe for damage.

NG

REPLACE FUEL TANK INLET PIPE SUB-ASSY

OK

6

CHECK VACUUM HOSES(VAPAOR PRESSURE SENSOR - FUEL
TANK,CHARCOAL CANISTER - VSV FOR PRESSURE SWITCHING VALVE)

NG

REPAIR OR CONNECT VSV AND SENSOR
CONNECTOR

OK

7

CHECK FUEL HOSE(FUEL TANK - CHARCOAL CANISTER)

NG

REPAIR OR REPLACE

OK

8

CHECK EACH VSV CONNECTOR FOR LOOSENESS AND DISCONNECTION

NG

REPAIR OR CONNECT VSV AND SENSOR
CONNECTOR

OK