Lexus ES300 (1997 year). Manual — part 309

DI–12

–

DIAGNOSTICS

ENGINE

164

1997 LEXUS ES300 (RM511U)

(b)

LEXUS Enhanced Signals.

LEXUS hand–held tester display

Measurement Item

Normal Condition*

MISFIRE RPM

Engine RPM for first misfire range

Misfire 0: 0 rpm

MISFIRE LOAD

Engine load for first misfire range

Misfire 0: 0 g/r

INJECTOR

Fuel injection time for cylinder No.1

Idling: 1.6

∼

2.9 ms

IAC DUTY RATIO

Intake Air Control Valve Duty Ratio

Opening ratio rotary solenoid type IAC valve

Idling: 27

∼

47 %

STARTER SIG

Starter Signal

Cranking: ON

CTP SIG

Closed Throttle Position Signal

Throttle Fully Closed: ON

A/C SIG

A/C Switch Signal

A/C ON: ON

PNP SW

Park/Neutral Position Switch Signal

P or N position: ON

ELCTRCL LOAD SIG

Electrical Load Signal

Defogger switch ON: ON

STOP LIGHT SW

Stop Light Switch Signal

Stop light switch ON: ON

PS OIL PRESS SW

Power Steering Oil Pressure Switch Signal

Turn steering wheel: ON

FC IDL

Fuel Cut Idle: Fuel cut when throttle valve fully

closed, during deceleration

Fuel cut operating: ON

FC TAU

Fuel Cut TAU: Fuel cut during very light load

Fuel cut operating: ON

CYL#1

∼

CYL#6

Abnormal revolution variation for each cylinder

0%

IGNITION

Total number of ignition for every 1,000 revolu-

tions

0

∼

3,000 rpm

EGRT GAS

EGR Gas Temperature Sensor Value

EGR not operating:

Temperature between intake air temp. and

engine coolant temp.

INTAKE CTRL VSV

Intake Air Control Valve VSV Signal

VSV operating: ON

EGR SYSTEM

EGR system operating condition

Idling: OFF

A/C CUT SIG

A/C Cut Signal

A/C S/W OFF: ON

FUEL PUMP

Fuel Pump Signal

Idling: ON

EVAP (PURGE) VSV

EVAP VSV Signal

VSV operating: ON

VAPOR PRESS VSV

Vapor Pressure VSV Signal

VSV operating: ON

∗

: If no conditions are specifically stated for ”ldling”, it means the shift lever is at N or P position, the A/C switch

is OFF and all accessory switches are OFF.

–

DIAGNOSTICS

ENGINE

DI–13

165

1997 LEXUS ES300 (RM511U)

LEXUS hand–held tester display

Measurement Item

Normal Condition*

TOTAL FT B1

Total Fuel Trim Bank 1: Average value for fuel

trim system of bank 1

Idling: 0.8

∼

1.2

TOTAL FT B2

Total Fuel Trim Bank 1: Average value for fuel

trim system of bank 2

Idling: 0.8

∼

1.2

O2 LR B1, S1

Oxygen Sensor Lean Rich Bank 1, Sensor 1 Re-

sponse time for oxygen sensor output to switch

from lean to rich

Idling after warmed up: 0

∼

1,000 msec.

O2 LR B2, S1

Oxygen Sensor Lean Rich Bank 2, Sensor 1 Re-

sponse time for oxygen sensor output to switch

from lean to rich

Idling after warmed up: 0

∼

1,000 msec.

O2 RL B1, S1

Oxygen Sensor Rich Lean Bank 1, Sensor 1

Response time for oxygen sensor output to

switch from rich to lean

Idling after warmed up: 0

∼

1,000 msec.

O2 RL B2, S1

Oxygen Sensor Rich Lean Bank 2, Sensor 1

Response time for oxygen sensor output to

switch from rich to lean

Idling after warmed up: 0

∼

1,000 msec.

∗

: If no conditions are specifically stated for ”ldling”, it means the shift lever is at N or P position, the A/C switch

is OFF and all accessory switches are OFF.

DI097–01

DI–14

–

DIAGNOSTICS

ENGINE

166

1997 LEXUS ES300 (RM511U)

DIAGNOSTIC TROUBLE CODE CHART

HINT:Parameters listed in the chart may not be exactly the same as your reading due to the type of instru-
ment or other factors.
If a malfunction code is displayed during the DTC check in check mode, check the circuit for that code listed
in the table below. For details of each code, turn to the page referred to under the ’’See page ’’ for the respec-
tive ’’DTC No.’’ in the DTC chart.

DTC No.

(See Page)

Detection Item

Trouble Area

MIL*

Memory

P0100

(

DI–23

)

Mass Air Flow Circuit

Malfunction

Open or short in mass air flow meter circuit

Mass air flow meter

ECM

P0101

(

DI–27

)

Mass Air Flow Circuit

Range/Performance

Problem

Mass air flow meter

P0110

(

DI–28

)

Intake Air Temp. Circuit

Malfunction

Open or short in intake air temp. sensor circuit

Intake air temp. sensor

ECM

P0115

(

DI–33

)

Engine Coolant Temp. Circuit

Malfunction

Open or short in engine coolant temp. sensor circuit

Engine coolant temp. sensor

ECM

P0116

(

DI–37

)

Engine Coolant Temp. Circuit

Range/Performance Problem

Engine coolant temp. sensor

Cooling system

P0120

(

DI–38

)

Throttle/Pedal Position

Sensor/Switch ”A” Circuit

Malfunction

Open or short in throttle position sensor circuit

Throttle position sensor

ECM

P0121

(

DI–42

)

Throttle/Pedal Position

Sensor/Switch ”A” Circuit

Range/Performance Problem

Throttle position sensor

P0125

(

DI–43

)

Insufficient Coolant Temp. for

Closed Loop Fuel Control

Open or short in heated oxygen sensor circuit

Heated oxygen sensor

P0130

(

DI–46

)

Heated Oxygen Sensor Circuit

Malfunction (Bank 1 Sensor 1)

Heated oxygen sensor

Fuel trim malfunction

P0133

(

DI–49

)

Heated Oxygen Sensor Circuit

Slow Response

(Bank 1 Sensor 1)

Heated oxygen sensor

P0135

(

DI–50

)

Heated Oxygen Sensor Heater

Circuit Malfunction

(Bank 1 Sensor 1)

Open or short in heater circuit of heated oxygen sensor

Heated oxygen sensor

ECM

P0136

(

DI–52

)

Heated Oxygen Sensor Circuit

Malfunction

(Bank 1 Sensor 2)

Heated oxygen sensor

P0141

(

DI–50

)

Heated Oxygen Sensor Heater

Circuit Malfunction

(Bank 1 Sensor 2)

Same as DTC No. P0135

P0150

(

DI–46

)

Heated Oxygen Sensor

Circuit Malfunction

(Bank 2 Sensor 1)

Same as DTC No. P0130

*:

MIL lights up

–

DIAGNOSTICS

ENGINE

DI–15

167

1997 LEXUS ES300 (RM511U)

DTC No.

(See Page)

Detection Item

Trouble Area

MIL*

Memory

P0153

(

DI–49

)

Heated Oxygen Sensor

Circuit Slow Response

(Bank 2 Sensor 1)

Same as DTC No. P0133

P0155

(

DI–50

)

Heated Oxygen Sensor Heater

Circuit Malfunction

(Bank 2 Sensor 1)

Same as DTC No. P0135

P0171

(

DI–54

)

System too Lean

(Fuel Trim)

Air intake (hose loose)

Fuel line pressure

Injector blockage

Heated oxygen sensor malfunction

Mass air flow meter

Engine coolant temp. sensor

P0172

(

DI–54

)

System too Rich

(Fuel Trim)

Fuel line pressure

Injector leak, blockage

Heated oxygen sensor malfunction

Mass air flow meter

Engine coolant temp. sensor

P0300

(

DI–57

)

Random/Multiple Cylinder

Misfire Detected

Ignition system

I j

t

P0301

P0302

P0303

P0304

P0305

P0306

(

DI–57

)

Misfire Detected

– Cylinder 1

– Cylinder 2

– Cylinder 3

– Cylinder 4

– Cylinder 5

– Cylinder 6

Injector

Fuel line pressure

Compression pressure

Valve clearance not to specification

Valve timing

Mass air flow meter

Engine coolant temp. sensor

*2

P0325

(

DI–62

)

Knock Sensor 1 Circuit

Malfunction

Open or short in knock sensor 1 circuit

Knock sensor 1 (looseness)

ECM

P0330

(

DI–62

)

Knock Sensor 2 Circuit

Malfunction

Open or short in knock sensor 2 circuit

Knock sensor 2 (looseness)

ECM

P0335

(

DI–66

)

Crankshaft Position Sensor

”A” Circuit

Malfunction

Open or short in crankshaft position sensor circuit

Crankshaft position sensor

Starter

ECM

P0340

(

DI–69

)

Camshaft Position Sensor

Circuit Malfunction

Open or short in camshaft position sensor circuit

Camshaft position sensor

Starter

ECM

P0401

(

DI–71

)

Exhaust Gas Recirculation

Flow Insufficient Detected

EGR valve (stuck closed)

Open or short in EGR gas temp. sensor circuit

EGR gas temp. sensor

Open in VSV circuit for EGR

VSV for EGR

Vacuum control valve

Vacuum hose disconnected or blocked

ECM

*1

:

MIL lights up *2: MIL lights up or blinking