2005 TOYOTA AVENSIS diagnostic

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.

A73686
05±376
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
1CHECK OTHER DTC OUTPUT(IN ADDITION TO DTC P0133 AND/OR P0153)
(a)Read the DTC using the hand±held tester. Result:
Display (DTC output)Proceed to
Only ºP0133 and/or P0153º are outputA
ºP0133 or P0153º and other DTCs are outputB
HINT:

If any other codes besides ºP0133 and/or P0153º are output, perform t\
he troubleshooting for those
DTCs first.

If a misfiring DTC(s) is present, record the DTC(s) that indicates mis\
firing cylinder(s), then proceed to
A.
BGO TO RELEVANT DTC CHART (See page 05±309)
A
2READ VALUE OF HAND±HELD TESTER(HEATED OXYGEN SENSOR DURING IDLING)
(a)Warm up the heated oxygen sensor (sensor 1) with the engine speed at 2,\
500 rpm for approximately
90 seconds.
(b)Read the output voltage of the heated oxygen sensor (sensor 1) during \
idling. Heated oxygen sensor output voltage:
Alternates repeatedly between less than 0.4 V and more than 0.55 V, and period of ºtº must exist
less than 1.0 sec. (See the following table).
NGGo to step 5
OK
3PERFORM CONFIRMATION DRIVING PATTERN (See page 05±363)
HINT:
Clear all DTCs prior to performing the confirmation driving pattern. GO

A62378
Component Side
+B
HT
E1


 B1S1 H7
A61830
+B
HT
E1 Component Side
B2S1 H9
B16200
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±377
AVENSIS REPAIR MANUAL (RM1018E)
4 READ OUTPUT DTC(DTC P0133 AND/OR P0153 ARE OUTPUT AGAIN)
(a) Read the DTC using the hand±held tester.
Result:
Display (DTC output)Proceed to
ºP0133 and/or P0153º are output againA
ºP0133 and/or P0153º are not output againB
B CHECK FOR INTERMITTENT PROBLEMS
A
REPLACE HEATED OXYGEN SENSOR
5 INSPECT HEATED OXYGEN SENSOR(HEATER RESISTANCE)
(a) Disconnect the H7 or H9 heated oxygen sensor connec-
tor.
(b) Measure the resistance between the terminals of the
heated oxygen sensor connector.
Standard (Bank 1, 2 Sensor 1):
Terminal No.Resistance
1 (HT) ± 2 (+B)11 to 16
at 20
C (68
F)
1 (HT) ± 4 (E1)No Continuity
NG REPLACE HEATED OXYGEN SENSOR
OK
6 INSPECT EFI RELAY
(a) Remove the EFI relay from the engine room R/B No. 4.
(b) Inspect the EFI relay.
Standard:
Terminal No.Specified condition
1 ± 2Continuity
No Continuity
3 ± 5Continuity
(Apply battery voltage terminals 1 and 2)

A76821
Wire Harness Side
B1S1B2S1 H7 H9
Heated Oxygen Sensor Connector OX
HT
OX
HT
E1E1
A76823
OX2A
ECM Connector E12
OX1A
HT2A HT1A
E2 E13
A72920
Reference (Bank 1 Sensor 1 System Drawing)
Heated Oxygen Sensor
EFI Relay
Heater
Sensor
OX1A HT1A
Duty
Control ECM
From
Battery
EFI Fuse
E2 EFI No. 2
Fuse
MREL OX HT
E1 +B
05±378
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
NG REPLACE EFI RELAY
OK
7 CHECK HARNESS AND CONNECTOR(HEATED OXYGEN SENSOR ± ECM)
(a) Disconnect the H7 or H9 heated oxygen sensor connec-
tor.
(b) Disconnect the E12 and E13 ECM connectors.
(c) Check for continuity between the wire harness side con-
nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
OX (H7±3) ± OX1A (E12±22)
HT (H7±1) ± HT1A (E12±5)
E1 (H7±4) ± E2 (E13±28)ContinuityOX (H8±3) ± OX2A (E12±23)Continuity
HT (H8±1) ± HT2A (E12±4)
E1 (H8±4) ± E2 (E13±28)
Standard (Check for short):
Symbols (Terminal No.)Specified condition
OX (H7±3) or OX1A (E12±22) ± Body ground
HT (H7±1) or HT1A (E12±5) ± Body groundNo continuityOX (H8±3) or OX2A (E12±23) ± Body groundNo continuity
HT (H8±1) or HT2A (E12±4) ± Body ground
HINT:

The OX1A and HT1A means the heated oxygen sensor
bank 1 sensor 1.

The OX2A and HT2A means the heated oxygen sensor
bank 2 sensor 1.
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK

±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
05±379
AVENSIS REPAIR MANUAL (RM1018E)
8CHECK AIR INDUCTION SYSTEM
(a)Check for vacuum leaks in the air induction system.
NGREPAIR OR REPLACE AIR INDUCTION SYSTEM
OK
9CHECK FUEL PRESSURE(LOW PRESSURE) (See page 11±33)
NGCHECK AND REPLACE FUEL PUMP, PRESSURE REGULATOR, FUEL PIPE LINE AND
FILTER
OK
10CHECK FUEL PRESSURE(HIGH PRESSURE) (See page 11±33)
NGCHECK AND REPLACE FUEL PUMP, PRESSURE REGULATOR, FUEL PIPE LINE AND
FILTER
OK
11CONFIRM IF ANY MISFIRING DTCS WERE PRESENT AT STEP 1
(a)Misfiring DTC ºP0301, P0302, P0303 and/or P0304º was present at step 1. NOREPLACE HEATED OXYGEN SENSOR
YES
12REPLACE FUEL INJECTOR ASSY (See page 11±42)
HINT:
If one or more the misfiring DTCs ºP0301, P0302, P0303 and/or P0304º\
were present at step 1, replace the
injector(s) mounted on the misfiring cylinder(s) that is referred by the DTC(s)\
with normal injector(s). GO
13PERFORM CONFIRMATION DRIVING PATTERN (See page 05±363)
HINT:
Clear all DTCs prior to performing the confirmation driving pattern.GO

05±380
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
14 READ OUTPUT DTC(DTC P0133 AND/OR P0153 ARE OUTPUT AGAIN)
(a) Read the DTC using the hand±held tester.
Result:
Display (DTC output)Proceed to
ºP0133 and/or P0153º are output againA
ºP0133 and/or P0153º are not output againB
B REPLACE FUEL INJECTOR ASSY
A
REPLACE HEATED OXYGEN SENSOR

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