1996 TOYOTA RAV4 Engine

S02514
1
Oxygen Sensor
(Bank1 Sensor 2)
21
2B
B6
5
14ECM
E5
E5
E4 BR A
A
AA
ECJ2 Junction
Connector Oxygen Sensor
(Bank 1 Sensor 1)
BROX1
OX2
E1
BR
BR
DI−40
− DIAGNOSTICSENGINE
1996 RAV4 (RM447U)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Connect the OBDII scan tool or TOYOTA hand−held tester and read value for
voltage output of oxygen sensor.
PREPARATION:
(a) Connect the OBDII scan tool or TOYOTA hand−held tester to the DLC 3.
(b) Warm up engine to normal operating temperature.
CHECK:
Read voltage output of oxygen sensor (bank 1 sensor 1) when engine is suddenly raced.
HINT:
Perform quick racing to 4,000 rpm 3 times using accelerator pedal.
OK:
Oxygen sensor output a RICH signal (0.45 V or more) at least once.
OK Check and replace ECM (See page IN−30).
NG

− DIAGNOSTICSENGINE
DI−41
1996 RAV4 (RM447U)
2 Check for open and short in harness and connector between ECM and oxygen
sensor (See page IN−30).
NG Repair or replace harness or connector.
OK
Replace oxygen sensor.

A01666
Vehicle speed
50 − 65 km/h
(31 − 40 mph)
Idling
IG SW OFF
1 − 3 min.
1 min.
Time (1)(2)(4)
(5) (3) DI−42
− DIAGNOSTICSENGINE
1996 RAV4 (RM447U)
DTC P0130 Oxygen Sensor Circuit Malfunction
(Bank 1 Sensor 1)
CIRCUIT DESCRIPTION
Refer to ”Insufficient Coolant Temp. for Closed Loop Fuel Control” on page DI−39.
DTC No.DTC Detecting ConditionTrouble Area
P0130
Voltage output of oxygen sensor remains at 0.35 V or more,
0.55 V or less, during idling after the engine is warmed up
(2 trip detection logic)Oxygen sensor
Fuel trim malfunction
HINT:
Sensor 1 refers to the sensor closer to the engine body.
The oxygen sensor’s output voltage and the short−term fuel trim value can be read using the OBDII scan
tool or TOYOTA hand−held tester.
WIRING DIAGRAM
Refer to page DI−39 for the WIRING DIAGRAM.
CONFIRMATION DRIVING PATTEN
(1) Connect the TOYOTA hand−held tester to the DLC3.
(2) Switch the TOYOTA hand−held tester from normal mode to check mode (See page DI−3).
(3) Start the engine and warm it up with all accessory switches OFF.
(4) Drive the vehicle at 50 − 65 km/h (31 − 40 mph) for 1 − 3 minutes to warm up the oxygen sensor.
(5) Idle the engine for 1 minute.
HINT:
If a malfunction exists, the MIL will light up during step (5).
NOTICE:
If the conditions in this test are not strictly followed, detection of the malfunction will not be possible.
If you do not hove a TOYOTA hand−held tester, turn the ignition switch OFF after performing steps
(3) to (5), then perform steps (3) to (5) again.
DI3ZK−01

− DIAGNOSTICSENGINE
DI−43
1996 RAV4 (RM447U)
INSPECTION PROCEDURE
1 Check for open and short in harness and connector between ECM and oxygen
sensor (See page IN−30).
NG Repair or replace harness or connector.
OK
2 Check for oxygen sensor date.
PREPARATION:
(a) Connect the OBDII scan tool or TOYOTA hand−held tester to the DLC 3.
(b) Warm up engine to normal operation temperature.
CHECK:
Read the oxygen sensor output voltage and short−term fuel trim.
RESULT:
PatternOxygen sensor output voltageShort−term fuel trim
1Lean condition (Changes at 0.55 V or less)Changes at about +20 %
2Rich condition (Changes at 0.35 V or more)Changes at about −20 %
3Except 1 and 2
1, 2 Check fuel trim system (See page DI−48).
3

A00292
O K N G N G N G
1 V
0.55 V
0.35 V
0 V
DI−44
− DIAGNOSTICSENGINE
1996 RAV4 (RM447U)
3 Check the output voltage of oxygen sensor during idling.
PREPARATION:
Warm up the oxygen sensor with the engine at 2,500 rpm for approx. 90 sec.
CHECK:
Use the OBDII scan tool or TOYOTA hand−held tester read the output voltage of the oxygen sensor during
idling.
OK:
Oxygen sensor output voltage:
Alternates repeatedly between approx. 0.35 V and approx. 0.55 V (See the following table.)
OK Perform confirmation driving pattern
(See page DI−42).
NG
Replace oxygen sensor.

− DIAGNOSTICSENGINE
DI−45
1996 RAV4 (RM447U)
DTC P0133 Oxygen Sensor Circuit Slow Response
(Bank 1 Sensor 1)
CIRCUIT DESCRIPTION
Refer to ”Insufficient Coolant Temp. for Closed Loop Fuel Control” on page DI−39.
DTC No.DTC Detecting ConditionTrouble Area
P0133
Response time for the oxygen sensor’s voltage output to
change from rich to lean, or from lean to rich, is 1 sec. or more
during idling after the engine is warmed up
(2 trip detection logic)
Oxygen sensor
HINT:
Sensor 1 refers to the sensor closer to the engine body.
INSPECTION PROCEDURE
1 Are there any other codes (besides DTC P0133) being output?
YES Go to relevant DTC chart.
NO
Replace oxygen sensor.
DI3ZL−01

DI−46
− DIAGNOSTICSENGINE
1996 RAV4 (RM447U)
DTC P0136 Oxygen Sensor Circuit Malfunction
(Bank 1 Sensor 2)
CIRCUIT DESCRIPTION
Refer to ”Insufficient Coolant Temp. for Closed Loop Fuel Control” on page DI−39.
DTC No.DTC Detecting ConditionTrouble Area
P0136
Voltage output of the oxygen sensor (bank 1 sensor 2)
remains at 0.4 V or more or 0.5 V or less when the vehicle is
driven at 40km/h (25 mph) or more after the engine is warmed
up
(2 trip detection logic)
Oxygen sensor
HINT:
Sensor 2 refers to the sensor farther away from the engine body.
WIRING DIAGRAM
Refer to page DI−39 for the WIRING DIAGRAM.
INSPECTION PROCEDURE
1 Are there any other codes (besides DTC P0136) being output?
YES Go to relevant DTC chart.
NO
2 Check for open and short in harness and connector between ECM and oxygen
sensor (See page IN−30).
NG Repair or replace harness or connector.
OK
DI3ZM−01

− DIAGNOSTICSENGINE
DI−47
1996 RAV4 (RM447U)
3 Check the output voltage of oxygen sensor (bank 1 sensor 2).
PREPARATION:
(a) Connect the OBDII scan tool or TOYOTA hand−held tester to the DLC 3.
(b) Warm up engine to normal operating temperature.
CHECK:
Read the output voltage of oxygen sensor (Bank 1 Sensor 2) when engine is suddenly raced.
HINT:
Perform quick racing to 4,000 rpm for 3 mins using accelerator pedal.
OK:
Oxygen sensor output voltage: Alternates from 0.4 V or less to 0.5 V or more.
OK Check that each connector is properly con-
nected.
NG
Replace oxygen sensor.