TOYOTA PREVIA 91-97 REPAIR MANUAL

DTC

CHART (SAE

Controlled)

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.

OTC

No.

P0100 P0101 P0110 P0115 P0116 P0120 P0121 P0125 P0130

Detection

Item

Mass

Air

Flow Circuit

MalfunctionMass

Air

Flow Circuit

Range/PerformanceProblemIntake

Air

Temp. Circuit

MalfunctionEngine Coolant Temp.Circuit MalfunctionEngine Coolant Temp.Circuit

Range/

Performance

Problem

Throttle/Pedal PositionSensor/Switch

"A"

Circuit

Malfunction

Throttle/Pedal PositionSensor/Switch

"A"

Circuit

Range/

Performance

Problem Insufficient

Coolant

Temp,

for

Closed Loop

Fuel

Control

Heated

Oxygen Sensor

Circuit

Malfunction

(Bank

1

Sensor

1)

Trouble

Area

• Open

or

short

in

mass

air

flow

meter

circuit

• Mass

airflow

meter

• ECM • Mass

air

flow meter

• Intake

air

temp,

sensor

• ECM• Open

or

short

in

engine coolant

temp,

sensor

circuit

* Engine coolant

temp,

sensor

• ECM• Engine

coolant

temp,

sensor

• Cooling

system

• Open

or

short

in

throttle

position

sensor circuit

• Throttle

position

sensor

« ECM # Throttle

position

sensor

• Air

intake (hose

loose)

• Fuel

line

pressure

* Injector

blockage

• Open

or

short

in

heated oxygen sensor circuit

« Heated oxygen sensor

malfunction

* Mass

air

flow

meter

* Engine cooiant

temp,

sensor

• Heated oxygen sensor• Fuel

trim

malfunction

MIL*^00 O ° o^0 o Q

Memory

o c o /--. o o o o c

*: O

MIL

lights

up

90914GA4

Fig.

110

Engine

diagnostic

codes—

2TZ-FZE

engine

DTC

CHART

(Cont'd)

DTC

No.

P0133 P0135 P0136 P0141 P0171 P0172 P0300 P0301P0302P0303P0304 P0325

Detection

Item

Heated

Oxygen

Sensor

Circuit

Slow Response

(Bank

1

Sensor

1)

Heated Oxygen SensorHeater

Circuit

Malfunction

(Bank

1

Sensor

1)

Heated Oxygen SensorCircuit

Malfunction

(Bank

1

Sensor

2)

Heated Oxygen SensorHeater

Circuit

Malfunction

(Bank

1

Sensor

2)

System

too

Lean

(Fuel

Trim}

System

too

Rich

(Fuel

Trim)

Random/MultipleCylinder

Misfire Detected

Misfire

Detected

-Cylinder

1

-Cylinder

2

• Cylinder

3

-Cylinder

4

Knock Sensor

1

Circuit

Malfunction

Trouble

Area

• Heated oxygen sensor• Open

or

short

in

heater circuit

of

heated

oxygen sensor

• Heated

oxygen

sensor

heater

• ECM • Heated oxygen sensor• Same

as DTC No.

P0135

• Air

intake (hose

loose)

• Fuel

line

pressure

• Injector blockage• Heated

oxygen sensor

malfunction

• Mass

air

flow

meter

• Engine coolant

temp,

sensor

• Fuel

line

pressure

• Injector

leak,

blockage

• Heated

oxygen

sensor malfunction

• Mass

air

flow

meter

• Engine coolant

temp,

sensor

• Ignition

system

• Injector• Fuel

line

pressure

• EGR• Compression pressure• Valve clearance

not to

specification

• Valve

timing

• Mass

airflow

meter

• Engine coolant

temp,

sensor

• Open

or

short

in

knock sensor

1

circuit

• Knock

sensor

1

(looseness)

• ECM

MIL"

• o O o o ^ o

Memory

c G 0 O C O Q

':

O MIL

lights

up

9091

4GA5

Fig.

111

Engine

diagnostic

codes—

2TZ-FZE

engine

continued

fCO0)^0 3DOT__ ^:D>om GOGO^0 ^.GOO^0 —

I

ZDCDGO