Lexus ES300 (2002 year). Manual — part 365

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DIAGNOSTICS

SFI SYSTEM (1MZ-FE)

05-79

232

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

2

CHECK HARNESS AND CONNECTOR(EB1 CONNECTER - ECM)

NG

REPAIR OR REPLACE HARNESS AND
CONNECTOR

OK

CHECK AND REPLACE ECM

3

CHECK HARNESS AND CONNECTOR(EB1 CONNECTER - KNOCK SENSOR)

HINT:

If DTC P0325 has changed to P0330, check the knock sensor circuit on the right bank side.

If DTC P0330 has changed to P0325, check the knock sensor circuit on the left bank side.

NG

REPAIR OR REPLACE HARNESS AND
CONNECTOR

OK

REPLACE KNOCK CONTROL SENSOR

A57024

VVT Sensor RH
Crank Position Sensor No. 1

Crank Position Sensor

E10

E8

E10

E8

E10

E8

E8

ECM

VV1+

NE-

NE+

E1

VC

VV2+

VV2-

EF

VC

VVL+

VVL-

3

2

1

Y

L-Y

L-B

VVT Sensor LH
Crank Position Sensor No. 1

1

2

1

2

Y

BR

G

G

BR

A

A

A

J11 J/C

(1*)

R

1*: Shielded

27

34

27

1

18

26

31

BR

(1*)

05-80

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DIAGNOSTICS

SFI SYSTEM (1MZ-FE)

233

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

DTC

P0335

CRANKSHAFT POSITION SENSOR CIRCUIT
MALFANCTION

CIRCUIT DESCRIPTION

The crank position sensor (NE signal) consists of a magnet, iron core and pickup coil.
The NE signal plate has 34 teeth and is installed the crankshaft timing pulley. The NE signal sensor gener-
ates 34 signals at every engine revolution. The engine ECM detects the crankshaft angle and the engine
speed based on the NE signals, and the cylinder detection based on the combination of the G2 and NE sig-
nals.

DTC No.

DTC Detecting Condition

Trouble Area

P0335

No crank position sensor signal to ECM during cranking (2 trip
detection logic)

Open or short in crank position sensor circuit

Crank position sensor

P0335

No crank position sensor signal to ECM with engine speed 600
rpm or more (2 trip detection logic)

Crank osition sensor

Crankshaft timing pulley

ECM

WIRING DIAGRAM

051X9-06

A53763

NE+

NE-

GND

CH1

A61581

NE Signal Wave forms

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DIAGNOSTICS

SFI SYSTEM (1MZ-FE)

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2002 LEXUS ES300 REPAIR MANUAL (RM911U)

INSPECTION PROCEDURE

HINT:

Perform troubleshooting of DTC P0335 first. If no trouble is found, troubleshoot the following mechani-
cal systems.

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 (See page

18-2

)

(a)

Check the output waveform.

Item

Contents

Terminal

CH1: NE+

⇔

NE-

Equipment Set

5V/DIV, 20ms/DIV

Condition

During Cranking or idling

HINT:
The correct waveforms are as shown.

NG

REPLACE CRANK POSITION SENSOR

OK

A52113

A54406

NE+

NE-

E2

E10

05-82

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DIAGNOSTICS

SFI SYSTEM (1MZ-FE)

235

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

2

CHECK HARNESS AND CONNECTOR(ECM - CRANK POSITION SENSOR)

(a)

Disconnect the ECM E10 connector.

(b)

Disconnect the crank position sensor connector.

(c)

Check for open between the terminals NE+ of the ECM
connector and 1 of the crank position sensor connector.
Resistance: 1

Ω

or less

(d)

Check for short between the terminals NE+ and E2 of the
ECM connector.
Resistance: 1 M

Ω

or more

(e)

Check for open between the terminals NE- of the ECM
connector and 2 of the crank position sensor connector.
Resistance: 1

Ω

or less

(f)

Check for short between the terminals NE- and E2 of the
ECM connector.
Resistance: 1 M

Ω

or more

NG

REPAIR OR REPLACE HARNESS AND
CONNECTOR

OK

3

CHECK SENSOR INSTLLATION(CRANK POSITION SENSOR)

NG

TIGHTEN SENSOR

OK

4

CHECK CRANKSHAFT TIMING PULLEY

NG

REPLACE CRANKSHAFT TIMING PULLEY

OK

CHECK AND REPLACE ECM