heater TOYOTA AVENSIS 2005 Service Service Manual
Page 392 of 5135
A76787
Wire Harness Side
+B HT
A7Bank 1 Sensor 1
A/F Connector AF+
AF±
A79114
A8Bank 2 Sensor 1 Wire Harness Side
+B
HT
A/F Connector
AF+
AF±
A65745
E12
HA1AHA2AA1A±
A1A+
A2A±
A2A+
B62793
A/F Sensor A/F Relay
Heater
Sensor
A1A+ HA1A
Duty
Control ECM
From
Battery
A/F Fuse
A1A±
MREL Reference (Bank 1 Sensor 1 System Drawing)
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
05±255
AVENSIS REPAIR MANUAL (RM1018E)
3 CHECK HARNESS AND CONNECTOR(ECM ± A/F SENSOR)
(a) Disconnect the A7 or A8 A/F sensor connector.
(b) Disconnect the E12 ECM connector.
(c) Check for continuity between the wire harness side con-
nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
AF+ (A7±3) ± A1A+ (E12±23)
AF± (A7±4) ± A1A± (E12±31)
HT (A7±1) ± HA1A (E12±6)ContinuityAF+ (A8±3) ± A2A+ (E12±22)Continuity
AF± (A8±4) ± A2A± (E12±30)
HT (A8±1) ± HA2A (E12±5)
Standard (Check for short):
Symbols (Terminal No.)Specified condition
AF+ (A7±3) or A1A+ (E12±23) ± Body ground
AF± (A7±4) or A1A± (E12±31) ± Body ground
HT (A7±1) or HA1A (E12±6) ± Body groundNo continuityAF+ (A8±3) or A2A+ (E12±22) ± Body groundNo continuity
AF± (A8±4) or A2A± (E12±30) ± Body ground
HT (A8±1) or HA2A (E12±5) ± Body ground
Page 418 of 5135
05CID±01
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
05±309
AVENSIS REPAIR MANUAL (RM1018E)
DIAGNOSTIC TROUBLE CODE CHART
HINT:
Parameters listed in the chart may not be exactly the same as your readings due to\
the type of instrument
or other factors.
If a malfunction code is displayed during the DTC check in the check mode, check the circuit f\
or the codes
listed in the table below. For details of each code, refer to the ''See page '' under the respective ''DTC No.''
in the DTC chart.
\f \b
*1
CHK ENG
P0010
(05±322)Camshaft Position ºAº Actuator
Circuit (Bank 1) Open or short in OCV circuit
OCV
ECM
P0011
(05±325)Camshaft Position ºAº ±Timing
Over± Advanced or System Per-
formance (Bank 1) Valve timing
OCV
VVT controller assembly
P0012
(05±325)Camshaft Position ºAº ±Timing
Over± Retarded (Bank 1) VVT controller assembly
ECM
P0016
(05±329)Crankshaft Position ± Camshaft
Position Correlation (Bank 1
Sensor A) Mechanical system (Timing chain has jumped a tooth, chain
stretched)
ECM
P0031
(05±330)Oxygen Sensor Heater Circuit
Low (Bank 1 Sensor 1)
Open in heater circuit of heated oxygen sensor
Heated oxygen sensor heater
EFI relay
EFI fuse
EFI No. 2 fuse
ECM
P0032
(05±330)Oxygen Sensor Heater Circuit
High (Bank 1 Sensor 1) Short in heater circuit of heated oxygen sensor
Heated oxygen sensor heater
ECM
P0037
(05±330)Oxygen Sensor Heater Control
Circuit Low (Bank 1 Sensor 2) Same as DTC No. P0031
P0038
(05±330)Oxygen Sensor Heater Control
Circuit High (Bank 1 Sensor 2) Same as DTC No. P0032
P0051
(05±330)Oxygen Sensor Heater Circuit
Low (Bank 2 Sensor 1) Same as DTC No. P0031
P0052
(05±330)Oxygen Sensor Heater Circuit
High (Bank 2 Sensor 1) Same as DTC No. P0032
P0057
(05±330)Oxygen Sensor Heater Control
Circuit Low (Bank 2 Sensor 2) Same as DTC No. P0031
P0058
(05±330)Oxygen Sensor Heater Control
Circuit High (Bank 2 Sensor 2) Same as DTC No. P0032
P0100
(05±336)Mass or volume Air Flow Circuit
Ohti ifltiit
P0102
(05±336)Mass or volume Air Flow Circuit
Low Input Open or short in mass air flow meter circuit
Mass air flow meter
ECM
P0103
(05±336)Mass or volume Air Flow Circuit
High InputECM
P0105
(05±342)Manifold Absolute Pressure/
Barometric Pressure Circuit
P0107
(05±342)Manifold Absolute Pressure/
Barometric Pressure Circuit Low
Input Open or short in manifold absolute pressure sensor circuit
Manifold absolute pressure sensor
ECM
P0108
(05±342)Manifold Absolute Pressure/
Barometric Pressure Circuit High
InputECM
Page 419 of 5135
05±310
±
DIAGNOSTICS SFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
\f
*
1
CHK ENG
\b
P0110
(05±347)Intake Air Temperature Circuit
Open or short in intake air temperature sensor circuit
Intake air temperature sensor (built in mass air flow meter)
ECM
P0112
(05±347)Intake Air Temperature Circuit
Low Input Short in intake air temperature sensor circuit
Intake air temperature sensor (built in mass air flow meter)
ECM
P0113
(05±347)Intake Air Temperature Circuit
High Input Open in intake air temperature sensor circuit
Intake air temperature sensor (built in mass air flow meter)
ECM
P0115
(05±351)Engine Coolant Temperature Cir-
cuit Open or short in engine coolant temperature sensor circuit
Engine coolant temperature sensor
ECM
P0116
(05±355)Engine Coolant Temperature Cir-
cuit Range/Performance Prob-
lem Cooling system
Engine coolant temperature sensor
Thermostat
P0117
(05±351)Engine Coolant Temperature Cir-
cuit Low Input Short in engine coolant temperature sensor circuit
Engine coolant temperature sensor
ECM
P0118
(05±351)Engine Coolant Temperature Cir-
cuit High Input Open in engine coolant temperature sensor circuit
Engine coolant temperature sensor
ECM
P0120
(05±356)Throttle/Pedal Position Sensor/
Switch ºAº Circuit Throttle position sensor (built in throttle body)
ECM
P0121
(05±362)Throttle/Pedal Position Sensor/
Switch ºAº Circuit Range/Perfor-
mance Problem
Throttle position sensor (built in throttle body)
P0122
(05±356)Throttle/Pedal Position Sensor/
Switch ºAº Circuit Low Input
Throttle position sensor (built in throttle body)
VTA1 circuit short
VC circuit open
ECM
P0123
(05±356)Throttle/Pedal Position Sensor/
Switch ºAº Circuit High Input
Throttle position sensor (built in throttle body)
VTA1 circuit open
E2 circuit open
VC and VTA1 circuit are short±circuited
ECM
P0130 *3
(05±363)
Oxygen Sensor Circuit (Bank 1
Sensor 1)
Open or short in heated oxygen sensor circuit
Heated oxygen sensor
Heated oxygen sensor heater
EFI relay
Air induction system
Fuel pressure
Injector
ECM
P0133 *3
(05±374)
Oxygen Sensor Circuit Slow Re-
sponse (Bank 1 Sensor 1)
Open or short in heated oxygen sensor circuit
Heated oxygen sensor
Heated oxygen sensor heater
EFI relay
Air induction system
Fuel pressure
Injector
ECM
Page 420 of 5135
±
DIAGNOSTICS SFI SYSTEM (1AZ±FSE)
05±311
AVENSIS REPAIR MANUAL (RM1018E)
\f
*
1
CHK ENG
\b
P0134
(05±381)Oxygen Sensor Circuit No Activ-
ity Detected (Bank 1 Sensor 1)
Open or short in heated oxygen sensor circuit
Heated oxygen sensor
Heated oxygen sensor heater
EFI relay
Air induction system
Fuel pressure
Injector
Gas leakage in exhaust system
PCV valve and hose
PCV hose connection
ECM
P0136 *3
(05±388)
Oxygen Sensor Circuit Malfunc-
tion (Bank 1 Sensor 2)
Open or short in heated oxygen sensor circuit
Heated oxygen sensor
Heated oxygen sensor heater
EFI relay
P0150 *3
(05±363)
Oxygen Sensor Circuit (Bank 2
Sensor 1)Same as DTC No. P0130
P0153 *3
(05±374)
Oxygen Sensor Circuit Slow Re-
sponse (Bank 2 Sensor 1)Same as DTC No. P0133
P0154
(05±381)Oxygen Sensor Circuit No Activ-
ity Detected (Bank 2 Sensor 1) Same as DTC No. P0134
P0156 *3
(05±388)
Oxygen Sensor Circuit Malfunc-
tion (Bank 2 Sensor 2)Same as DTC No. P0136
P0171 *3
(05±394)System too Lean (Bank 1)
Air induction system
Injector blockage
Mass air flow meter
Manifold absolute pressure sensor
Engine coolant temperature sensor
Fuel pressure
Gas leakage in exhaust system
Open or short in heated oxygen sensor (bank 1 sensor 1)
circuit
Heated oxygen sensor (bank 1 sensor 1)
Heated oxygen sensor heater (bank 1 sensor 1)
EFI relay
PCV valve and hose
PCV hose connection
ECM
P0172 *3
(05±394)System too Rich (Bank 1)
Injector leak, blockage
Mass air flow meter
Manifold absolute pressure sensor
Engine coolant temperature sensor
Ignition system
Fuel pressure
Gas leakage in exhaust system
Open or short in heated oxygen sensor (bank 1 sensor 1)
circuit
Heated oxygen sensor (bank 1 sensor 1)
ECM
Page 421 of 5135
05±312
±
DIAGNOSTICS SFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
\f
*
1
CHK ENG
\b
P0174 *3
(05±394)System too Lean (Bank2)
Air induction system
Injector blockage
Mass air flow meter
Manifold absolute pressure sensor
Engine coolant temperature sensor
Fuel pressure
Gas leakage in exhaust system
Open or short in heated oxygen sensor (bank 2 sensor 1)
circuit
Heated oxygen sensor (bank 2 sensor 1)
Heated oxygen sensor heater (bank 2 sensor 1)
EFI relay
PCV valve and hose
PCV hose connection
ECM
P0175 *3
(05±394)System too Rich (Bank2)
Injector leak, blockage
Mass air flow meter
Manifold absolute pressure sensor
Engine coolant temperature sensor
Ignition system
Fuel pressure
Gas leakage in exhaust system
Open or short in heated oxygen sensor (bank 2 sensor 1)
circuit
Heated oxygen sensor (bank 2 sensor 1)
ECM
P0190
(05±406)Fuel Rail Pressure Sensor Cir-
cuit Open or short in fuel pressure sensor circuit
Fuel pressure sensor
ECM
P0191
(05±410)Fuel Rail Pressure Sensor Cir-
cuit Range/Performance
Open or short in high±pressure fuel pump (spill valve) circuit
High±pressure fuel pump
Low±pressure fuel pump
Fuel pipe
Fuel relief valve
Fuel pressure regulator
ECM
P0200
(05±415)Injector Circuit/Open
P0201
(05±415)Injector Circuit/Open ±
(Cylinder 1)
Open or short in EDU circuit
P0202
(05±415)Injector Circuit/Open ±
(Cylinder 2)
Oen or short in EDU circuit
EDU (Injector driver)
Fuel injector assy
P0203
(05±415)Injector Circuit/Open ±
(Cylinder 3)
jy
ECM
P0204
(05±415)Injector Circuit/Open ±
(Cylinder 4)
P0220
(05±356)Throttle/Pedal Position Sensor/
Switch ºBº Circuit Throttle position sensor (built in throttle body)
ECM
P0222
(05±356)Throttle/Pedal Position Sensor/
Switch ºBº Circuit Low Input
Throttle position sensor (built in throttle body)
VTA2 circuit short
VC circuit open
ECM
P0223
(05±356)Throttle/Pedal Position Sensor/
Switch ºBº Circuit High Input
Throttle position sensor (built in throttle body)
VTA2 circuit open
E2 circuit open
VC and VTA2 circuit are short±circuited
ECM
Page 425 of 5135
05±316
±
DIAGNOSTICS SFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
\f
*
1
CHK ENG
\b
P2122
(05±492)Throttle/Pedal Position Sensor/
Switch ºDº Circuit Low Input
P2123
(05±492)Throttle/Pedal Position Sensor/
Switch ºDº Circuit High Input
P2125
(05±492)Throttle/Pedal Position Sensor/
Switch ºEº Circuit Same as DTC No. P2120
P2127
(05±492)Throttle/Pedal Position Sensor/
Switch ºEº Circuit Low Input
P2128
(05±492)Throttle/Pedal Position Sensor/
Switch ºEº Circuit High Input
P2135
(05±356)Throttle Pedal Position Sensor/
Switch ºAº/ºBº Voltage Correla-
tion VTA1 and VTA2 circuit are short±circuited
Throttle position sensor (built in throttle body)
ECM
P2138
(05±492)Throttle Pedal Position Sensor/
Switch ºDº/ºEº Voltage Correla-
tion
Same as DTC No. P2120
P2195 *3
(05±363)
Oxygen Sensor Signal Stuck
Lean (Bank 1 Sensor 1)Open or short in heated oxygen sensor (bank 1, 2 sensor 1)
circuit
P2196 *3
(05±363)
Oxygen Sensor Signal Stuck
Rich (Bank 1 Sensor 1)Heated oxygen sensor (bank 1, 2 sensor 1)
Heated oxygen sensor heater (bank 1, 2 sensor 1)
EFI relay
P2197 *3
(05±363)
Oxygen Sensor Signal Stuck
Lean (Bank 2 Sensor 1)EFI relay
Air induction system
Fuel pressure
P2198 *3
(05±363)
Oxygen Sensor Signal Stuck
Rich (Bank 2 Sensor 1)
Fuel ressure
Injector
ECM
P2716 *4
(05±967)
Pressure Control Solenoid ºDº
ElectricalElectronic controlled automatic transmission (ECT)
B2799
(05±1625)Engine Immobiliser System Mal-
function Immobiliser system
*1: CHK ENG (Check engine warning light) is illuminated
*
2: CHK ENG (Check engine warning light) is illuminated or blinks
*
3: For Euro±OBD vehicles only.
*
4: For A/T only.
Page 432 of 5135
05±300
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
4. FAIL±SAFE CHART
If any of the following codes is recorded, the ECM enters into the fail±safe mode.
DTC No.Fail±Safe OperationFail±Safe Deactivation Conditions
P0031
P0032
P0037
P0038
P0051
P0052
P0057
P0058
Faulty heater circuit is turned off.Ignition switch is OFF.
P0100
P0102
P0103Ignition timing is calculated based on an engine speed and
a throttle opening angle.ºPassº detection has occurred. Upon this occurrence, the
ECM will return to normal mode.
P0105
P0107
P0108Intake air pressure is controlled with a calculated value in
proportion to the throttle opening angle and the engine
speed.
Limit the engine speed to 3,000 rpm or less.
ºPassº detection has occurred. Upon this occurrence, the
ECM will return to normal mode.
P0110
P0112
P0113
Intake air temperature is fixed at 20 C (68 F)ºPassº detection has occurred. Upon this occurrence, the
ECM will return to normal mode.
P0115
P0117
P0118
Engine coolant temperature is fixed at 80 ºPassº detection has occurred. Upon this occurrence, the
ECM will return to normal mode.
P0120
P0121
P0122
P0123
P0220
P0222
P0223
P2135
Turn off the power for the throttle motor, return the throttle
valve in position using the return spring, and fuel cut inter-
mittent.Repeat the following conditions at least 2 seconds or more
with the throttle position switch closed:
VTA is more than 0.1 V but less than 0.95 V
Engine speed is 0 km/h
P0190
P0191Stop the high±pressure pump operation.
Limit the engine speed to 2,000 rpm or less.After it is returned to normal condition, turn the ignition switch
ON.
P0200Turn off the INJ relay and cut the power for the EDU.
P0201
P0202
P0203
P0204Stop fuel injection for an abnormal cylinder and related
other cylinders.
Limit the engine speed to 3,000 rpm or less.After it is returned to normal condition, turn the ignition switch
ON.
P0325
P0327
P0328
Maximum timing retardationIgnition switch is OFF.
P0351
P0352
P0353
P0354
Stop fuel injection for all the cylinders.ºPassº detection has occurred. Upon this occurrence, the
ECM will return to normal mode.
P0604
P0606
P0607
P0657Turn off the power for the throttle motor, return the throttle
valve in position using the return spring, and fuel cut inter-
mittent.After it is returned to normal condition, turn the ignition switch
ON.
P1235Stop the high±pressure pump operation.
Limit the engine speed to 2,000 rpm or less.After it is returned to normal condition, turn the ignition switch
ON.
P2008Force IACV to close.After it is returned to normal condition, turn the ignition switch
ON.
Page 484 of 5135
AB B+
Power Transistor
Platinum Hot Wire
(Heater)
Output
Voltage
Temperature
sensor
Platinum Hot Wire (Heater)
Temperature sensor
AB B+
Power Transistor
Platinum Hot Wire
(Heater)
Output
Voltage
Temperature
sensor
Platinum Hot Wire (Heater)
Temperature sensor
AB B+
Power Transistor
Platinum Hot Wire
(Heater)
Output
Voltage
Temperature
sensor
Platinum Hot Wire (Heater)
Temperature sensor
A53295
05±336
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0100 MASS OR VOLUME AIR FLOW CIRCUIT
DTC P0102 MASS OR VOLUME AIR FLOW CIRCUIT
LOW INPUT
DTC P0103 MASS OR VOLUME AIR FLOW CIRCUIT
HIGH INPUT
CIRCUIT DESCRIPTION
The mass air flow meter uses a platinum hot wire. The hot wire mass air flow meter consists of a platinum
hot wire, a temperature sensor and a control circuit installed in a plastic housing. The hot wire mass air flow
meter works on the principle that the hot wire and temperature sensor located in the intake air bypass of the
housing detect any changes in the intake air temperature.
The hot wire is maintained at the set temperature by controlling the current flow through the hot wire. This
current flow is then measured as the output voltage of the mass air flow meter.
The circuit is constructed so that the platinum hot wire and temperature sensor provide a bridge circuit, with
the power transistor controlled so that the potential of A and B remains equal to maintain the set temperature.
DTC Detection ConditionTrouble Area
P0100Open or short in mass air flow meter circuit with engine speed
4,000 rpm or less for more than 3 seconds.
Ohti ifltiit
P0102Open in mass air flow meter circuit with engine speed 4,000
rpm or less for more than 3 seconds.Open or short in mass air flow meter circuit
Mass air flow meter
ECM
P0103Short in mass air flow meter circuit with engine speed 4,000
rpm or less for more than 3 seconds.ECM
HINT:
After confirming DTC ºP0100, P0102 or P0103º, use the hand±held tester to confirm the air flow rate from
the ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALLº.
Air flow rate (gm/s)Malfunction
Approximately 0.0Mass air flow meter power source circuit open
VG circuit open or short
271.0 or moreEVG circuit open
05CJE±01
Page 490 of 5135
05±330
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0031 OXYGEN SENSOR HEATER CONTROL
CIRCUIT LOW (BANK 1 SENSOR 1)
DTC P0032 OXYGEN SENSOR HEATER CONTROL
CIRCUIT HIGH (BANK 1 SENSOR 1)
DTC P0037 OXYGEN SENSOR HEATER CONTROL
CIRCUIT LOW (BANK 1 SENSOR 2)
DTC P0038 OXYGEN SENSOR HEATER CONTROL
CIRCUIT HIGH (BANK 1 SENSOR 2)
DTC P0051 OXYGEN SENSOR HEATER CONTROL CIR-
CUIT LOW (BANK 2 SENSOR 1)
DTC P0052 OXYGEN SENSOR HEATER CONTROL
CIRCUIT HIGH (BANK 2 SENSOR 1)
DTC P0057 OXYGEN SENSOR HEATER CONTROL
CIRCUIT LOW (BANK 2 SENSOR 2)
DTC P0058 OXYGEN SENSOR HEATER CONTROL
CIRCUIT HIGH (BANK 2 SENSOR 2)
05CJD±01
Page 491 of 5135
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.