2005 TOYOTA AVENSIS sensor

05±72
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
19READ OUTPUT DTC(DTC P0171 AND/OR P0172 ARE OUTPUT AGAIN)
(a)Read the DTC using the hand±held tester. Result:
Display (DTC output)Proceed to
DTC ºP0171 and/or P0172º are not output againA
DTC ºP0171 and/or P0172º are output againB
BGo to step 22
A
20REPLACE HEATED OXYGEN SENSOR
GO
21READ OUTPUT DTC(DTC P0171 AND/OR P0172 ARE OUTPUT AGAIN)
(a)Read the DTC using the hand±held tester. Result:
Display (DTC output)Proceed to
DTC ºP0171 and/or P0172º are not output againA
DTC ºP0171 and/or P0172º are output againB
BCHECK AND REPLACE ECM (See page 01±32) AND PERFORM CONFIRMATION DRIV-
ING PATTERN (See page 05±54)
A
22 CONFIRM IF VEHICLE HAS RUN OUT OF FUEL IN PAST
NO CHECK FOR INTERMITTENT PROBLEMS (See Page 05±5)
YES
DTC IS CAUSED BY RUNNING OUT OF FUEL

±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
05±65
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0135OXYGEN SENSOR HEATER CIRCUIT
MALFUNCTION (BANK 1 SENSOR 1)
DTCP0141OXYGEN SENSOR HEATER CIRCUIT MALFUNCTION (BANK 1 SENSOR 2)
CIRCUIT DESCRIPTION
Refer to DTC P0125 on page 05±45.
DTC No.DTC Detecting ConditionTrouble Area
P0135

When the heater operates, heater current exceeds 3.5 A
(1 trip detection logic)

Heater current is 0.2 A or less when the heater operates
(1 trip detection logic)
Open or short in heater circuit of heated oxygen sensor

Heated oxygen sensor heater

ECM
P0141

When the heater operates, heater current exceeds 2 A
(1 trip detection logic)

Heater current is 0.2 A or less when the heater operates
(1 trip detection logic)
Open or short in heater circuit of heated oxygen sensor

Heated oxygen sensor heater

ECM
WIRING DIAGRAM
Refer to DTC P0125 on page 05±45.
INSPECTION PROCEDURE
HINT:

If different DTCs that are related to a different system are output simultaneously while terminal E2 is
used as a ground terminal, terminal E2 may be open.

Read freeze frame data using \f \b\f\f
 Freeze frame data records the engine conditions
when a malfunction is detected. When troubleshooting, it is useful for d\
etermining whether the vehicle
was running or stopped, the engine was warmed up or not, the air±fuel ra\
tio was lean or rich, etc. at
the time of the malfunction.
1INSPECT HEATED OXYGEN SENSOR(HEATER RESISTANCE) (See page 05±45)
NG REPLACE HEATED OXYGEN SENSOR
OK
2INSPECT EFI RELAY (See page 10±3)
NG REPLACE EFI RELAY
OK
3CHECK FUSE(EFI No.2) (See page 05±45)
NG CHECK FOR SHORT IN ALL HARNESS AND COMPONENTS CONNECTED FUSE
OK
05C6A±01

A18294
E03 (±)HT1A (+)HT1B(+)
ECM Connector
E12E10
05±66
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
4INSPECT ECM(HTL OR HTL2 VOLTAGE)
(a)Turn the ignition switch ON.
(b)Measure the voltage between the terminals of the E10 and E12 ECM connector.
Standard:
Symbols (Terminal No.)Specified condition
HT1A (E12±4) ± E03 (E12±5)9to14VHT1B (E10±4) ± E03 (E12±5)9 to 14 V
OKCHECK AND REPLACE ECM (See page 01±32)
NG
5CHECK HARNESS AND CONNECTOR(EFI RELAY ± HEATED OXYGEN SENSOR) (See page 05±45)
NGREPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
CHECK AND REPLACE ECM (See page 01±32)

05±60
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0133OXYGEN SENSOR CIRCUIT SLOW RESPONSE (BANK 1 SENSOR 1)
CIRCUIT DESCRIPTION
Refer to DTC P0125 on page 05±45.
DTC NoDTC Detecting ConditionTrouble Area
P0133
Response time for heated oxygen sensor voltage output 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 circuit

Heated oxygen sensor

Air induction system

Fuel pressure

Injector

ECM
HINT:

 


 \f
\f















\b


\f

 
\f


 
 

\f
 \f
\f


WIRING DIAGRAM
Refer to DTC P0125 on page 05±45.
INSPECTION PROCEDURE
HINT:
Hand±held tester only:
Narrowing down the trouble area is possible by performing ACTIVE TEST of the following \
ºA/F CONTROLº
(heated oxygen sensor or other trouble areas can be distinguished).
(a) Perform ACTIVE TEST using 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 with the engine speed at 2,500 rpm for approximately. 90 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 second delay in the sensor 1 (front sensor) output, and ther\
e is about 20 seconds delay
in the sensor 2 (rear sensor) output.
05B3W±02

+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 of the
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 (1ZZ±FE/3ZZ±FE)
05±61
AVENSIS REPAIR MANUAL (RM1018E)
The following procedure of A/F CONTROL enable the technician to check and graph volatge output of the
heated oxygen sensor.
For displaying the graph indication, enter ºACTIVE TEST / A/F CONTROL / USER DATA,º then select ºO2S
B1S1 and O2S B1S2º by pressing ºYESº button and push ºENTERº button before pressing ºF4º button.
NOTICE:
If the vehicle is lack of fuel, the air±fuel ratio becomes LEAN and DTC P0133 will be set, and the CHK
ENG then comes on.
HINT:

If different DTCs that are related to a different system are output simultaneously while terminal E2 is
used as a ground terminal, terminal E2 may be open.

Read freeze frame data using    
 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.

A73686
05±62
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
1CHECK OTHER DTC OUTPUT(BESIDES DTC P0133)
(a)Read the DTC using the hand±held tester. Result:
Display (DTC output)Proceed to
Only ºP0133º is outputA
ºP0133 or P0133º and other DTCs are outputB
HINT:
If any other codes besides ºP0133º are output, perform the troublesh\
ooting for those DTCs first.
BGO TO RELEVANT DTC CHART (See page 05±16)
A
2READ VALUE OF HAND±HELD TESTER(HEATED OXYGEN SENSOR DURING IDLING)
(a)Warm up the heated oxygen sensor with the engine speed at 2,500 rpm for a\
pproximately 90 seconds.
(b)Read the output voltage of the heated oxygen sensor during idling.
Heated oxygen sensor output voltage:
Alternates less than 0.4 V and more than 0.55 V, and duration ºtº must exist more than 0.9 sec.
(See the following table).
OKGo to step 11
NG
3INSPECT HEATED OXYGEN SENSOR(HEATER RESISTANCE) (See page 05±45)
NGREPLACE HEATED OXYGEN SENSOR
OK
4INSPECT EFI RELAY (See page 10±3)
NG REPLACE EFI RELAY
OK

±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
05±63
AVENSIS REPAIR MANUAL (RM1018E)
5CHECK FUSE(EFI No.2) (See page 05±45)
NGCHECK FOR SHORT IN ALL HARNESS AND
COMPONENTS CONNECTED FUSE
OK
6CHECK HARNESS AND CONNECTOR(HEATED OXYGEN SENSOR ± ECM) (See page 05±45)
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
7CHECK HARNESS AND CONNECTOR(EFI RELAY ± HEATED OXYGEN SENSOR) (See page 05±45)
NGREPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
8CHECK AIR INDUCTION SYSTEM
(a)Check for vacuum leaks in air induction system. NGREPAIR OR REPLACE AIR INDUCTION SYSTEM
OK
9CHECK FUEL PRESSURE (See page 11±5)
(a)Check the fuel pressure (high or low pressure). NGREPAIR OR REPLACE FUEL SYSTEM
OK
10INSPECT FUEL INJECTOR ASSY(INJECTION AND VOLUME) (See page 11±8)
NGREPLACE HEATED OXYGEN SENSOR
OK
REPLACE HEATED OXYGEN SENSOR
11PERFORM CONFIRMATION DRIVING PATTERN (See page 05±54)
GO

05±64
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
12READ OUTPUT DTC(DTC P0133 IS OUTPUT AGAIN)
(a)Read the DTC using the hand±held tester. Result:
Display (DTC output)Proceed to
ºP0133º is not output againA
ºP0133º is output againB
BCHECK FOR INTERMITTENT PROBLEMS (See Page 05±5)
A
REPLACE HEATED OXYGEN SENSOR