Lexus ES300 (1997 year). Service manual - part 335

–

DIAGNOSTICS

ENGINE

DI–117

269

1997 LEXUS ES300   (RM511U)

DTC

P1335

Crankshaft Position Sensor Circuit 
Malfunction (during engine running)

CIRCUIT DESCRIPTION

Refer to DTC P0335 (Crankshaft Position Sensor ”A” Circuit Malfunction) on page 

DI–66

.

DTC No.

DTC Detecting Condition

Trouble Area

P1335

No crankshaft position sensor signal to ECM with engine

speed 1,000 rpm or more

Open or short in crankshaft position sensor circuit

Crankshaft position sensor

Starter

ECM

WIRING DIAGRAM

Refer to DTC P0335 on page 

DI–66

 for the WIRING DIAGRAM.

INSPECTION PROCEDURE

Refer to DTC P0335 (Crankshaft Position Sensor ”A” Circuit Malfunction) on page 

DI–66

.

DI0A1–01

S06113

Close 

←

 Valve  Opening 

→

 Open

0V

5V

Output

 V

oltage

S05464

EGR Valve Position Sensor

3

ECM

E9

1

2

E9

E8

Y

W–G

BR

1

15

22

VC

5V

EGLS

E2

DI–118

–

DIAGNOSTICS

ENGINE

270

1997 LEXUS ES300   (RM511U)

DTC

P1410

EGR Valve Position Sensor Circuit 
Malfunction

CIRCUIT DESCRIPTION

The EGR valve position sensor is mounted on the EGR valve
and detects the lift amount of EGR valve. The lift amount of
EGR valve which is detected by the EGR valve position sensor
provides feedback to the ECM to control the lift amount of EGR
valve in response to engine operating conditions.

DTC No.

DTC Detecting Condition

Trouble Area

P1410

Open or short in EGR valve position sensor circuit

(2 trip detection logic)

Open or short in EGR valve position sensor circuit

EGR valve position sensor

ECM

WIRING DIAGRAM

DI0A2–01

A00379

ON

1(+)

BE6653
S05694

S05742

1

2

–

DIAGNOSTICS

ENGINE

DI–119

271

1997 LEXUS ES300   (RM511U)

INSPECTION PROCEDURE

HINT:If DTC ”P0110” (Intake Air Temp. Circuit Malfunction), ”P0115” (Engine Coolant Temp. Circuit Malfunc-
tion), ”P0120” (Throttle/Pedal Position/Switch ”A” Circuit Malfunction), ”P1410” (EGR Valve Position Sensor
Circuit Malfunction) are output simultaneously, E2 (Sensor Ground) may be open.

1

Check voltage between terminal VC of wire harness side connector and body
ground.

PREPARATION:
(a)

Disconnect the vacuum hose from EGR valve.

(b)

Disconnect the EGR valve position sensor connector.

(c)

Turn ignition switch ON.

CHECK:
Measure voltage between terminal 1 of wire harness side con-
nector and body ground.
OK:
Voltage:  4.5 

∼

 5.5 V

NG

 Go to step 4.

OK

2

Check EGR valve position sensor.

PREPARATION:
Disconnect the EGR valve position sensor connector.
CHECK:
Measure resistance between terminals 1(VC) and 2(E2) of
EGR valve position sensor.
OK:
Resistance:  1.5 

∼

 4.3 k

Ω

NG

 Replace EGR valve position sensor.

OK

A00380

ON

E2(–)

EGLS(+)

BE6653

S05695

DI–120

–

DIAGNOSTICS

ENGINE

272

1997 LEXUS ES300   (RM511U)

3

Check voltage between terminals EGLS and E2 of ECM connectors.

PREPARATION:
(a)

Disconnect the vacuum hose from EGR valve.

(b)

Connect the hand–held vacuum pump to EGR valve.

(c)

Remove the glove compartment (See page 

SF–64

).

(d)

Turn ignition switch ON.

CHECK:
Measure voltage between terminals EGLS and E2 of ECM con-
nectors.
OK:

Condition

Condition

Voltage

EGR valve

Vacuum

Voltage

Fully closed

0 kPa

(0 mmHg, 0 in.Hg)

0.4 

∼

 1.6 V

Fully open

17.3 kPa

(130 mmHg, 5.12 in.Hg)

3.2 

∼

 5.1 V

NG

 Check for open and short in harness and
 connector between ECM and EGR valve
 position sensor (EGLS or E2 line).

OK

Check and replace ECM (See page 

IN–27

).