TOYOTA AVENSIS 2005 Service Repair Manual

A72920
Reference (Bank 1 Sensor 1 System Drawing)Heated Oxygen Sensor
EFI Relay
Heater
SensorOX1A HT1A
Duty
Control
ECM
From
Battery EFI Fuse
E2
EFI No. 2
Fuse
MREL
OX HT
E1
+B
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
05±331
AVENSIS REPAIR MANUAL (RM1018E)
CIRCUIT DESCRIPTION
Refer to DTC P0130 on page 05±363.
HINT:
The ECM provides a pulse width modulated control circuit to adjust current \
through the heater. The heated
oxygen sensor heater circuit uses a relay on the B+ side of the circuit.
DTC No.DTC Detection ConditionTrouble Area
P0031
P0037Heated current is 0.2 A or less when heater operates with +B >
10.5 V and < 11.5 V (1 trip detection logic)
Open in heater circuit of heated oxygen sensor

Heated oxygen sensor heater

EFI relay
P0037
P0051
P0057Heated current is 0.25 A or less when heater operates with +B

11.5 V (1 trip detection logic)
EFI relay

EFI fuse

EFI No. 2 fuse

ECM
P0032
P0038
P0052
P0058
Heated current exceeds 2 A when heater operates.
(1 trip detection logic)
Short in heater circuit of heated oxygen sensor

Heated oxygen sensor heater

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.

Sensor 2 refers to the sensor farthest away from the engine assembly.
WIRING DIAGRAM
Refer to DTC P0130 on page 05±363.
INSPECTION PROCEDURE
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 deter\
mining 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.

A61830
+BHT
E1 Component Side
Heated Oxygen Sensor H9B2S1
A62378
+B
HT
E1


 
Component Side
Heated Oxygen Sensor H7B1S1
H8B1S2
H10
B2S2
B16200
05±332
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
1 INSPECT HEATED OXYGEN SENSOR(HEATER RESISTANCE)
(a) Disconnect the H7, H8, H9 or H10 heated oxygen sensor
connector.
(b) Measure the resistance between the terminals of the
heated oxygen sensor connector.
Standard (Bank 2 sensor 1):
Terminal No.Resistance
1 (HT) ± 2 (+B)11 to 16
at 20
C (68
F)
1 (HT) ± 4 (E1)No Continuity
(c) Measure the resistance between the terminals of the
heated oxygen sensor connector.
Standard (Except Bank 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
2 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)
NG REPLACE EFI RELAY
OK

A76903
HT1B (+)HT1A (+)
HT2A (+)
HT2B (+)
E1 (±)
ECM Connector
E12
E11
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
05±333
AVENSIS REPAIR MANUAL (RM1018E)
3INSPECT ECM(HT1A, HT1B, HT2A OR HT2B VOLTAGE)
(a)Turn the ignition switch ON.
(b)Measure the voltage between the applicable terminals of
the E11 and E12 ECM connectors.
Standard:
Symbols (Terminal No.)Specified condition
HT1A (E12±5) ± E1 (E11±1)
HT1B (E12±25) ± E1 (E11±1)9to14VHT2A (E12±4) ± E1 (E11±1)9 to 14 V
HT2B (E12±33) ± E1 (E11±1)
HINT:

The HT1A means the heated oxygen sensor bank 1 sen-
sor 1.

The HT1B means the heated oxygen sensor bank 1 sen-
sor 2.

The HT2A means the heated oxygen sensor bank 2 sen-
sor 1.

The HT2B means the heated oxygen sensor bank 2 sen-
sor 2.
OKCHECK AND REPLACE ECM (See page 01±32)
NG

A66290
Wire Harness Side
B1S1
B1S2
B2S1B2S2 H7
H9
H8
H10
Heated Oxygen Sensor Connector HT
HT
+B+B
A81695
HT1A
HT2BHT2A
HT1B
E12
ECM Connector
A66053
Engine Room R/B No. 4
EFI Relay
05±334
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
4 CHECK HARNESS AND CONNECTOR(HEATED OXYGEN SENSOR ± ECM,
HEATED OXYGEN SENSOR ± EFI RELAY)
(a) Check the harness and connector between the ECM and
heated oxygen sensor connectors.
(1) Disconnect the H7, H8, H9 or H10 heated oxygen
sensor connector.
(2) Disconnect the E12 ECM connector.
(3) Check for continuity between the wire harness side
connectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
HT (H7±1) ± HT1A (E12±5)
HT (H8±1) ± HT1B (E12±25)ContinuityHT (H9±1) ± HT2A (E12±4)Continuity
HT (H10±1) ± HT2B (E12±33)
Standard (Check for short):
Symbols (Terminal No.)Specified condition
HT (H7±1) or HT1A (E12±5) ± Body ground
HT (H8±1) or HT1B (E12±25) ± Body groundNo continuityHT (H9±1) or HT2A (E12±4) ± Body groundNo continuity
HT (H10±1) or HT2B (E12±33) ± Body ground
(b) Check the harness and connector between the heated
oxygen sensor connector and EFI relay.
(1) Inspect the EFI No.2 fuse.

Remove the EFI No.2 fuse from the engine
room R/B No. 4.

Check for continuity in the EFI No.2 fuse.
Standard: Continuity
(2) Disconnect the H7, H8, H9 or H10 heated oxygen
sensor connector.
(3) Remove the EFI relay from the engine room R/B No.
4.
(4) Check for continuity between the wire harness side
connectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
+B (H7±2) ± EFI relay (3)
+B (H8±2) ± EFI relay (3)Continuity+B (H9±2) ± EFI relay (3)Continuity
+B (H10±2) ± EFI relay (3)
Standard (Check for short):
Symbols (Terminal No.)Specified condition
+B (H7±2) or EFI relay (3) ± Body ground
+B (H8±2) or EFI relay (3) ± Body groundNo continuity+B (H9±2) or EFI relay (3) ± Body groundNo continuity
+B (H10±2) or EFI relay (3) ± Body ground

±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
05±335
AVENSIS REPAIR MANUAL (RM1018E)
NGREPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
CHECK AND REPLACE ECM (See page 01±32)

±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
05±329
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0016CRANKSHAFT POSITION ±CAMSHAFT
POSITION CORRELATION (BANK 1 SENSOR
A)
CIRCUIT DESCRIPTION
Refer to DTC P0335 on page 05±433.
DTC No.DTC Detection ConditionTrouble Area
P0016Deviation in crankshaft position sensor signal and camshaft
position sensor (bank 1) signal (2 trip detection logic)
Mechanical system
(Timing chain has jumped a tooth, chain stretched)

ECM
WIRING DIAGRAM
Refer to DTC P0335 on page 05±433.
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.
1CHECK VALVE TIMING (See page 14±186)
(a) Check for loose and jumping teeth of timing chain.
NGADJUST VALVE TIMING (See page 14±186) (REPAIR OR REPLACE TIMING CHAIN)
OK
CHECK AND REPLACE ECM (See page 01±32)
05CE0±01

±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
05±325
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0011CAMSHAFT POSITION ºAº ±TIMING OVER±
ADVANCED OR SYSTEM PERFORMANCE
(BANK 1)
DTCP0012CAMSHAFT POSITION ºAº ±TIMING OVER± RETARDED (BANK 1)
CIRCUIT DESCRIPTION
Refer to DTC P0010 on page 05±322.
DTC No.DTC Detection ConditionTrouble Area
P0011
Condition (a) or (b) continues after engine is warmed up and
engine speed at 400 to 4,000 rpm (Problem of the advanced
OCV.):
(a)Valve timing does not change from current valve timing
(b)Current valve timing is fixed

Valve timing

OCV
P0012
Condition (a) or (b) continues after engine is warmed up and
engine speed at 400 to 4,000 rpm (Problem of the retarded
OCV.):
(a)Valve timing does not change from current valve timing
(b)Current valve timing is fixed
OCV

Camshaft timing gear assy

ECM
WIRING DIAGRAM
Refer to DTC P0010 on page 05±322.
INSPECTION PROCEDURE
HINT:
Advanced timing over
(Valve timing is out of specified range)P0011
Retarded timing over
(Valve timing is out of specified range)P0012

If DTC ºP0011 or P0012º is displayed, check VVT system circuit.

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 deter\
mining 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.
1CHECK VALVE TIMING (See page 14±186)
NGADJUST VALVE TIMING (See page 14±186)
OK
05CDZ±01

05±326
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
2 PERFORM ACTIVE TEST BY HAND±HELD TESTER(OPERATE OCV)
(a) Connect the hand±held tester to the DLC3.
(b) Start the engine and warm it up.
(c) Turn the ignition switch ON and push the hand±held tester main switch ON.
(d) Select the item ºDIAGNOSIS / OBD/MOBD / ACTIVE TEST / VVT CTRL B1º.
(e) Check the engine speed when operating the OCV by the hand±held tester.
Standard:
Tester operationSpecified condition
OCV is OFFNormal engine speed
OCV is ONRough idle or engine stall
NG Go to step 4
OK
3 CHECK IF DTC OUTPUTS REOCCUR
(a) Clear the DTC.
(1) Operating the hand±held tester to erase the codes, or disconnecting the battery terminal or the
EFI and ETCS fuses for 60 seconds or more.
(b) Start the engine and warm it up.
(c) Drive the vehicle around for 10 minutes or more.
(d) Read output DTC using the hand±held tester.
Standard: No DTC output.
HINT:
*: DTCs P0011 or P0012 is output when a foreign object in engine oil is caught in some part of the system.
These codes will stay registered even if the system returns to normal after a short time. These foreign objects
are then captured by the oil filter, thus eliminating the source of the problem.
OK VVT SYSTEM OK *
NG

A67528
OCV Signal Waveform1 msec./Division 5 V/
Division
GND
(A)(A) (A)
E11
OC1 +OC1±
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
05±327
AVENSIS REPAIR MANUAL (RM1018E)
4INSPECT ECM(OCV SIGNAL)
(a)Inspection using the oscilloscope.
(b)During idling, check the waveform between the terminals
of the E11 ECM connector.
Standard:
Symbols (Terminal No.)Specified condition
OC1+ (E11±16) ± OC1± (E11±15)Correct waveform is as shown
HINT:
The waveform frequency (A) is lengthened as the engine speed
becomes higher.
NGCHECK AND REPLACE ECM (See page 01±32)
OK
5 INSPECT OIL CONTROL VALVE FILTER
NG REPLACE OIL CONTROL VALVE FILTER
OK
6 INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSY(OCV) (See page 10±39)
OK Go to step 8
NG
7 REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSY(OCV)
GO
8INSPECT CAMSHAFT TIMING GEAR ASSY (See page 14±240)
OK Go to step 10
NG

05±328
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
9REPLACE CAMSHAFT TIMING GEAR ASSY (See page 14±240)
GO
10CHECK BLOCKAGE(OCV, OIL CHECK VALVE AND OIL HOLE)
NGREPAIR OR REPLACE
OK
11CHECK IF DTC OUTPUTS REOCCUR
(a)Clear the DTC. (1)Operating the hand±held tester to erase the codes, or disconnecting the batter\
y terminal or the
EFI and ETCS fuses for 60 seconds or more.
(b)Start the engine and warm it up.
(c)Drive the vehicle around for 10 minutes or more.
(d)Read output DTC using the hand±held tester.
Standard: No DTC output.
HINT:
*: DTCs P0011 or P0012 is output when a foreign object in engine oil is caught in so\
me part of the system.
These codes will stay registered even if the system returns to normal after a\
short time. These foreign objects
are then captured by the oil filter, thus eliminating the source of the problem.
OKVVT SYSTEM OK
NG
CHECK AND REPLACE ECM (See page 01±32)