2005 TOYOTA AVENSIS Circuit

+25 %
±12.5 %
More than 0.55 V
Less than 0.4V
Case 1
Case 2
Case 3
Case 4
Output voltage of heated oxygen
sensor (sensor 1: front sensor)
Injection volume
Output voltage
Output voltage of heated oxygen
sensor (sensor 2: rear sensor)Mainly suspect
trouble area
OK
+25 %
±12.5 %
More than 0.55 V
Less than 0.4V
Injection volume
Output voltage
+25 %
±12.5 %
More than 0.55 V
Less than 0.4V
Injection volume
Output voltage
Sensor 1: front sensor
(sensor 1, heater, sensor 1
circuit)
+25 %
±12.5 %
More than 0.55 V
Less than 0.4V
Injection volume
Output voltage
+25 %
±12.5 %
Injection volume
Output voltage
NG
+25 %
±12.5 %
Injection volume
Output voltage
NG
+25 %
±12.5 %
Injection volume
Output voltage
NG
+25 %
±12.5 %
Injection volume
Output voltage
NGExtremely rich or lean actual
air±fuel ratio
(Injector, fuel pressure, gas
leakage in exhaust system,
etc.) OK
OK
OK
No reaction
No reaction
No reaction No reaction


Sensor 2: rear sensor
(sensor 2, heater, sensor 2
circuit) 05±382
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
NOTICE:
There is a few seconds delay in the sensor 1 (front sensor) output. And there is about 20 seconds
delay in the sensor 2 (rear sensor).
The following A/F CONTROL procedure enables the technician to check and graph the voltage outputs of
both the heated oxygen sensors.
For displaying the graph indication, enter ºACTIVE TEST / A/F CONTROL / USER DATAº, then select ºO2S
B1S1 and O2S B1S2º or ºO2S B2S1 and O2S B2S2º by pressing ºYESº button and push ºENTERº button
before pressing ºF4º button.
HINT:

If different DTCs related to different systems that have terminal E2 as the ground terminal are output
simultaneously, terminal E2 may be open.

Read freeze frame data using the hand±held tester. Freeze frame data records the engine conditions
when a malfunction is detected. When troubleshooting, it is useful for determining 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.

A high heated oxygen sensor (sensor 1) voltage (0.55 V or more) could be caused by a rich air fuel
mixture. Check for conditions that would cause the engine to run rich.

A low heated oxygen sensor (sensor 1) voltage (0.4 V or less) could be caused by a lean air fuel mix-
ture. Check for conditions that would cause the engine to run lean.

05±388
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0136OXYGEN SENSOR CIRCUIT MALFUNCTION (BANK 1 SENSOR 2)
DTCP0156OXYGEN SENSOR CIRCUIT MALFUNCTION (BANK 2 SENSOR 2)
CIRCUIT DESCRIPTION
Refer to DTC P0130 on page 05±363.
DTC NoDTC Detection ConditionTrouble Area
P0136
P0156
If the following two conditions are satisfied at a time
(2 trip detection logic):
(a) The ECM records cycles which the vehicle driving and
stops 8 times or more.
(b) There was no change in the rich and lean outputs from heated oxygen sensor (sensor 2) for the 360 seconds un-
der air fuel ratio feedback control. (Throttle was not closed)

Open or short in heated oxygen sensor (bank 1, 2 sensor 2)
circuit

Heated oxygen sensor (bank 1, 2 sensor 2)

Heated oxygen sensor heater (bank 1, 2 sensor 2)

EFI relay
HINT:

Bank 1 refers to the No. 1 and No. 4 cylinders.

Bank 2 refers to the No. 2 and No. 3 cylinders.

Sensor 2 refers to the sensor farthest away from the engine assembly.
WIRING DIAGRAM
Refer to DTC P0130 on page 05±363.
05CKC±01

+25 %
±12.5 %
More than 0.55 V
Less than 0.4V
Case 1
Case 2
Case 3
Case 4
Output voltage of heated oxygen
sensor (sensor 1: front sensor)
Injection volume
Output voltage
Output voltage of heated oxygen
sensor (sensor 2: rear sensor)Mainly suspect
trouble area
OK
+25 %
±12.5 %
More than 0.55 V
Less than 0.4V
Injection volume
Output voltage
+25 %
±12.5 %
More than 0.55 V
Less than 0.4V
Injection volume
Output voltage
Sensor 1: front sensor
(sensor 1, heater, sensor 1
circuit)
+25 %
±12.5 %
More than 0.55 V
Less than 0.4V
Injection volume
Output voltage
+25 %
±12.5 %
Injection volume
Output voltage
NG
+25 %
±12.5 %
Injection volume
Output voltage
NG
+25 %
±12.5 %
Injection volume
Output voltage
NG
+25 %
±12.5 %
Injection volume
Output voltage
NGExtremely rich or lean actual
air±fuel ratio
(Injector, fuel pressure, gas
leakage in exhaust system,
etc.) OK
OK
OK
No reaction
No reaction
No reaction No reaction


Sensor 2: rear sensor
(sensor 2, heater, sensor 2
circuit) 05±390
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
NOTICE:
There is a few seconds delay in the sensor 1 (front sensor) output. And there is about 20 seconds
delay in the sensor 2 (rear sensor).
The following A/F CONTROL procedure enables the technician to check and graph the voltage outputs of
both the heated oxygen sensors.
For displaying the graph indication, enter ºACTIVE TEST / A/F CONTROL / USER DATAº, then select ºO2S
B1S1 and O2S B1S2º or ºO2S B2S1 and O2S B2S2º by pressing ºYESº button and push ºENTERº button
before pressing ºF4º button.
HINT:

If different DTCs related to different systems that have terminal E2 as the ground terminal are output
simultaneously, terminal E2 may be open.

Read freeze frame data using the hand±held tester. Freeze frame data records the engine conditions
when a malfunction is detected. When troubleshooting, it is useful for determining 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.

05±374
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0133OXYGEN SENSOR CIRCUIT SLOW RESPONSE (BANK 1 SENSOR 1)
DTCP0153OXYGEN SENSOR CIRCUIT SLOW RESPONSE (BANK 2 SENSOR 1)
CIRCUIT DESCRIPTION
Refer to DTC P0130 on page 05±363.
DTC No.DTC Detection ConditionTrouble Area
P0133
P0153
Response time for output voltage of heated oxygen sensor
(sensor 1) to change from rich to lean, or from lean to rich, is
1.0 sec. or more during idling after engine is warmed up
(2 trip detection logic)

Open or short in heated oxygen sensor (bank 1, 2 sensor 1)
circuit

Heated oxygen sensor (bank 1, 2 sensor 1)

Heated oxygen sensor heater (bank 1, 2 sensor 1)

EFI relay

Air induction system

Fuel pressure

Injector

ECM
HINT:

Bank 1 refers to the No. 1 and No. 4 cylinders.

Bank 2 refers to the No. 2 and No. 3 cylinders.

Sensor 1 refers to the sensor closest to the engine assembly.
WIRING DIAGRAM
Refer to DTC P0130 on page 05±363.
INSPECTION PROCEDURE
HINT:
Hand±held tester only:
Narrowing down the trouble area is possible by performing the ºA/F CONTROLº ACTIVE TEST (heated oxy-
gen sensor or other trouble areas can be distinguished).
(a) Perform ACTIVE TEST using the hand±held tester (A/F CONTROL).
HINT:
ºA/F CONTROLº is an ACTIVE TEST which changes the injection volume\
±12.5 % or +25 %.
(1) Connect the hand±held tester to the DLC3 on the vehicle.
(2) Turn the ignition switch ON.
(3) Warm up the engine by running the engine at 2,500 rpm for approximately 9\
0 sec.
(4) Select the item ºDIAGNOSIS / OBD/MOBD / ACTIVE TEST / A/F CONTROLº\
.
(5) Perform ºA/F CONTROLº with the engine in an idle condition (press\
the right or left button).
Result:
Heated oxygen sensor reacts in accordance with increase and decrease of injection volume:
+25 %
rich output: More than 0.55 V
±12.5 %
lean output: Less than 0.4 V
NOTICE:
There is a few seconds delay in the sensor 1 (front sensor) output. And there is about 20 seconds
delay in the sensor 2 (rear sensor).
05CKA±01

+25 %
±12.5 %
More than 0.55 V
Less than 0.4V
Case 1
Case 2
Case 3
Case 4
Output voltage of heated oxygen
sensor (sensor 1: front sensor)
Injection volume
Output voltage
Output voltage of heated oxygen
sensor (sensor 2: rear sensor)Mainly suspect
trouble area
OK
+25 %
±12.5 %
More than 0.55 V
Less than 0.4V
Injection volume
Output voltage
+25 %
±12.5 %
More than 0.55 V
Less than 0.4V
Injection volume
Output voltage
Sensor 1: front sensor
(sensor 1, heater, sensor 1
circuit)
+25 %
±12.5 %
More than 0.55 V
Less than 0.4V
Injection volume
Output voltage
+25 %
±12.5 %
Injection volume
Output voltage
NG
+25 %
±12.5 %
Injection volume
Output voltage
NG
+25 %
±12.5 %
Injection volume
Output voltage
NG
+25 %
±12.5 %
Injection volume
Output voltage
NGExtremely rich or lean actual
air±fuel ratio
(Injector, fuel pressure, gas
leakage in exhaust system,
etc.) OK
OK
OK
No reaction
No reaction
No reaction No reaction


Sensor 2: rear sensor
(sensor 2, heater, sensor 2
circuit)
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±375
AVENSIS REPAIR MANUAL (RM1018E)
The following A/F CONTROL procedure enables the technician to check and graph the voltage outputs of
both the heated oxygen sensors.
For displaying the graph indication, enter ºACTIVE TEST / A/F CONTROL / USER DATAº, then select ºO2S
B1S1 and O2S B1S2º or ºO2S B2S1 and O2S B2S2º by pressing ºYESº button and push ºENTERº button
before pressing ºF4º button.
NOTICE:
If the vehicle is short of fuel, the air±fuel ratio becomes LEAN and DTCs P0133 and/or P0153 will be
recorded, and the CHK ENG then comes on.
HINT:

If different DTCs related to different systems that have terminal E2 as the ground terminal are output
simultaneously, terminal E2 may be open.

Read freeze frame data using the hand±held tester. Freeze frame data records the engine conditions
when a malfunction is detected. When troubleshooting, it is useful for determining 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.

A high heated oxygen sensor (sensor 1) voltage (0.55 V or more) could be caused by a rich air fuel
mixture. Check for conditions that would cause the engine to run rich.

A low heated oxygen sensor (sensor 1) voltage (0.4 V or less) could be caused by a lean air fuel mix-
ture. Check for conditions that would cause the engine to run lean.

A76882
Battery
FL MAIN
IGN
B±G 11
E9
2
6
Engine
Room
J/B No.4 Engine Room
R/B No.1
and
Engine Room
J/B No.1
AM2
1 2
B±G 4
18Driver
Side J/B
B±W
B±R
WECM
DH DA
B±R
B±R
1
1A 1
1
4A
1
4B (LHD)(RHD)
IP1
IE4 1
1
I13
Ignition Switch
AM2
IG2
(LHD) J8
C
(RHD)J26
A
(LHD)J8
C
(RHD)J26
A B±WCheck
Engine
Warning
Light
W
C11
Combination Meter
22 9
J/C
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
05±515
AVENSIS REPAIR MANUAL (RM1018E)
CHECK ENGINE WARNING LIGHT CIRCUIT
CIRCUIT DESCRIPTION
If the ECM detects a trouble, it illuminates CHK ENG. At this time, the EC\
M sets a DTC in the memory.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Troubleshoot each trouble symptom in accordance with the chart below .
CHK ENG remains onStart inspection from step 1
CHK ENG is not illuminatedStart inspection from step 3
1CLEAR DTC
(a)Connect the hand±held tester to the DLC 3.
(b)Turn the ignition switch ON and push the hand±held tester main switch \
ON.
(c)Read the DTC (See page 05±294).
(d)Clear the DTC (See page 05±294).
(e) Check that the CHK ENG is not illuminated.
Standard: CHK ENG is not illuminated
OK REPAIR CIRCUIT INDICATED BY OUTPUTCODE (See page 05±309)
NG
05CJB±01

A67445ECM ConnectorW
E9
05±516
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
2CHECK HARNESS AND CONNECTOR(CHECK FOR SHORT IN WIRE HARNESS)
(a)Disconnect the E9 ECM connector.
(b)Turn the ignition switch ON.
(c)Check that the CHK ENG is not illuminated. Standard: CHK ENG is not illuminated
NGCHECK AND REPAIR HARNESS AND CONNECTOR
OK
CHECK AND REPLACE ECM (See page 01±32)
3CHECK CHK ENG CONDITION
(a)Check that the CHK ENG is illuminated when turning the ignition switch O\
N. Standard: CHK ENG is illuminated
OKSYSTEM OK
NG
4INSPECT COMBINATION METER ASSY(CHK ENG CIRCUIT)
(a)See the combination meter troubleshooting on page 05±1509.
NG REPAIR OR REPLACE BULB OR COMBINATION METER ASSEMBLY
OK
CHECK AND REPAIR HARNESS AND CONNECTOR (COMBINATION METER ± ECM)

±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
05±475
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0724BRAKE SWITCH ºBº CIRCUIT HIGH
CIRCUIT DESCRIPTION
This STP signal is used to detect that the brakes have been applied. The STP\
signal voltage is the same
as the one supplied to the stop lights.
The STP signal is used mainly to control the fuel cut±off engine speed (The fuel cut±off engine speed is re-
duced slightly when the vehicle is braking).
DTC No.DTC Detection ConditionTrouble Area
P0724The stop light switch does not turn off even the vehicle is driv-
en. (2 trip detection logic)
Short in stop light switch signal circuit

Stop light switch

ECM
WIRING DIAGRAM
Refer to DTC P0504 on page 05±455.
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the hand±held tester. Freeze frame data records the engine conditions when
a malfunction is detected. When troubleshooting, it is useful for determi\
ning whether the vehicle was running
or stopped, the engine was warmed up or not, the air±fuel ratio was lea\
n or rich, etc. at the time of the mal-
function.
1 CHECK OPERATION OF STOP LIGHT
(a) Check if the stop lights go on and off normally when the brake pedal is operated and released.
NG REPAIR OR REPLACE STOP LAMP SWITCHCIRCUIT
OK
2 READ VALUE OF HAND±HELD TESTER(STOP LIGHT SWITCH)
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand±held tester main switch \
ON.
(c) Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALL / STOP LIGHT SWº and read its value displayed on the hand±held tester.
Result:
Brake PedalSTP Signal
DepressedON
ReleasedOFF
OK CHECK FOR INTERMITTENT PROBLEMS
NG
05CJ7±01