Lexus ES300 (2002 year). Manual - part 389

05-154

-

DIAGNOSTICS

SFI SYSTEM (1MZ-FE)

307

2002 LEXUS ES300 REPAIR MANUAL   (RM911U)

4

INSPECT CAMSHAFT TIMING GEAR ASSY

(a)

Remove the timing belt.

(b)

Remove the cylinder head cover.

(c)

Remove the OCV.

(d)

Drain oil into the VVT controller assembly.

(e)

Check whether the oil into VVT controller assembly is drained or not.
Result: The oil into VVT controller assembly is drained.

NG

REPLACE VVT CONTROLLER ASSEMBLY, AND
THEN GO TO  NEXT STEP

OK

5

INSPECT OCV (See page 

10-2

)

NG

REPLACE OCV, AND THEN GO TO  NEXT STEP

OK

6

CHECK BLOCKAGE OF OCV, OIL CHECK VALVE AND OIL PIPE NO.1

NG

REPAIR OR REPLACE

OK

7

CHECK WHETHER OR NOT DTC P1349/P1354 IS STORED

(a)

Clear the DTC (See page 

05-5

).

(b)

Perform simulation test.

(c)

Check whether or not DTC P1349/P1354 is stored.
Result: DTC P1349/P1354 is not stored.

HINT:
DTCs P1349 and P1354 are also output after the foreign object is caught in some part of the system in the
engine oil and the system returns to normal in a short time. As ECM controls so that foreign objects are
ejected, there is no problem about VVT. There is also no problem since the oil filter should get the foreign
object in the engine oil.

A53763

OC1+

OC2-

OC1-

OC2+

A19461

A15355

A32618

-

DIAGNOSTICS

SFI SYSTEM (1MZ-FE)

05-155

308

2002 LEXUS ES300 REPAIR MANUAL   (RM911U)

OBDII scan tool (excluding Hand-held Tester):

1

CHECK VALVE TIMING (See page 

14-75

)

NG

REPAIR VALVE TIMING

OK

2

CHECK OPERATION OF OCV

(a)

Check the engine speed when disconnecting the OCV connector.

(b)

Check the engine speed when applying battery positive voltage between the terminals of the OCV.

Result:

Resutl

Check (a)

Check (b)

A

Nomal engine

speed

Rough idle or

engine stall

B

Except 1

Except 1

B

Go to step 4

A

3

INSPECT ECM

(a)

Check the output waveform.
(1)

Turn the ignition switch ON.

(2)

Check the waveform between terminals OC1+ and
OC1-  of the ECM connector.

(3)

Check the waveform between terminals OC2+ and
OC2-  of the ECM connector.

Item

Contents

Terminal

OC1+ 

⇔

 OC1-,OC2+ 

⇔

 OC2-

Equipment Set

5V/DIV, 1ms/DIV

Condition

The engine stops, IG switch ON

HINT:

The correct waveform is as shown.

DTCs P1349 and P1354 are also output after the foreign
object is caught in some part of the system in the engine
oil and the system returns to normal in a short time. As
ECM controls so that foreign objects are ejected, there is
no problem about VVT. There is also no problem since the
oil filter should get the foreign object in the engine oil.

OK

VVT SYSTEM OK

NG

CHECK AND REPLACE ECM

05-156

-

DIAGNOSTICS

SFI SYSTEM (1MZ-FE)

309

2002 LEXUS ES300 REPAIR MANUAL   (RM911U)

4

INSPECT CAMSHAFT TIMING GEAR ASSY (See step 4 Hand-held Tester)

NG

REPLACE VVT CONTROLLER ASSEMBLY, AND
THEN GO TO  NEXT STEP

OK

5

INSPECT OCV (See page 

10-2

)

NG

REPLACE OCV, AND THEN GO TO  NEXT STEP

OK

6

CHECK BLOCKAGE OF OCV, OIL CHECK VALVE AND OIL PIPE NO.1

NG

REPAIR OR REPLACE

OK

7

CHECK WHETHER OR NOT DTC P1349/P1354 IS STORED
(See step 7 Hand-held Tester)

OK

VVT SYSTEM OK

NG

CHECK AND REPLACE ECM

-

DIAGNOSTICS

SFI SYSTEM (1MZ-FE)

05-157

310

2002 LEXUS ES300 REPAIR MANUAL   (RM911U)

DTC

P1350

VVT SENSOR/CAMSHAFT POSITION
SENSOR CIRCUIT MALFUNCTION(BANK2)

CIRCUIT DESCRIPTION

VVT sensor RH consists of a core and a pick up coil.
On the signal plate for VVT signal, there are three convex on its outer circumference and it is fixed to the
camshaft timing gear.
When the camshaft turns, the convex of the signal plate and the air-gap over the pick up coil will switch, and
with this the magnetic field will change and generate electricity inside the pick up coil. In addition, VVT sensor
LH adopts a sensor using a signal plate and a magnetic resistance element. By switching the air-gap of the
signal plate and the sensor, ECM voltage will be converted to a rectangular move and output as a signal.

DTC No.

DTC Detecting Condition

Trouble Area

No VVT sensor (Crank position sensor NO.1) signal to ECM
during cranking at 4 sec. or more

Open or short in VVT sensor (Crank position sensor No.1)

i

it

P1350

No VVT sensor (Crank position sensor NO.1) signal to ECM
with 5 sec. or more engine speed 600 rpm or more

circuit

VVT sensor (Crank position sensor No.1)

Camshaft timing gear

While crankshaft rotates twice, VVT sensor (Crank position
sensor NO.1) signal will be input to ECM 5 times.

Camshaft timing gear

ECM

WIRING DIAGRAM

Refer to DTC P0335 on page 

05-80

.

INSPECTION PROCEDURE

HINT:

If DTC P1350 is displayed, check right bank VVT sensor (Crank position sensor No.1).

Read freeze frame data using hand-held tester or OBD II scan tool. Because freeze frame records
the engine conditions when the malfunction is detected. When troubleshooting, it is useful for deter-
mining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio
was lean or rich, etc. at the time of the malfunction.

1

INSPECT CRANK POSITION SENSOR NO.1 (See page 

18-2

)

(a)

Check waveform. (See page 

05-83

)

NG

REPLACE CRANK POSITION SENSOR NO.1

OK

2

CHECK HARNESS AND CONNECTOR(ECM - VVT SENSOR) 
(See page 

05-83

)

NG

REPAIR OR REPLACE HARNESS AND
CONNECTOR

OK

3

CHECK SENSOR INSTLLATION(CRANK POSITION SENSOR NO.1)

NG

TIGHTEN SENSOR

OK

051MN-05