engine TOYOTA AVENSIS 2005 Service Repair Manual

05–28
–
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E) DTC No.
(See Page) Memory
*1
MIL
Trouble Area
Detection Item
P0115
( 05–60 )Engine Coolant Temperature Cir-
cuitOpen or short in engine coolant temperature sensor circuit
 Engine coolant temperature sensor
 ECM

P0116
( 05–65 )Engine Coolant Temperature Cir-
cuit Range/Performance Prob-
lem
Engine coolant temperature sensor
P0117
( 05–60 )Engine Coolant Temperature Cir-
cuit Low InputShort in engine coolant temperature sensor circuit
 Engine coolant temperature sensor
 ECM

P0118
( 05–60 )Engine Coolant Temperature Cir-
cuit High InputOpen in engine coolant temperature sensor circuit
 Engine coolant temperature sensor
 ECM

P0120
( 05–66 )Throttle/Pedal Position Sensor/
Switch ”A” CircuitThrottle position sensor (built into throttle body)
 ECM
P0121
( 05–73 )Throttle/Pedal Position Sensor/
Switch ”A” Circuit Range/Perfor-
mance Problem
Throttle position sensor (built into throttle body)
P0122
( 05–66 )Throttle/Pedal Position Sensor/
Switch ”A” Circuit Low Input
Throttle position sensor (built into throttle body)
 Short in VTA1 circuit
 Open in VC circuit
 ECM

P0123
( 05–66 )Throttle/Pedal Position Sensor/
Switch ”A” Circuit High Input
Throttle position sensor (built into throttle body)
 Open in VTA1 circuit
 Open in E2 circuit
 VC and VTA1 circuits are short–circuited
 ECM

P0130 *4
( 05–74 )Oxygen Sensor Circuit Malfunc-
tion (Bank 1 Sensor 1)
Open or short in heated oxygen sensor circuit
 Heated oxygen sensor (Sensor 1)
 Heated oxygen sensor heater (Sensor 1)
 EFI relay
 Air induction system
 Fuel pressure
 Injector
 ECM

P0133 *4
( 05–84 )Oxygen Sensor Circuit Slow Re-
sponse (Bank 1 Sensor 1)
Open or short in heated oxygen sensor circuit
 Heated oxygen sensor (Sensor 1)
 Heated oxygen sensor heater (Sensor 1)
 EFI relay
 Air induction system
 Fuel pressure
 Injector
 ECM

P0134
( 05–91 )Oxygen Sensor Circuit No Activ-
ity Detected (Bank 1 Sensor 1)
Open or short in heated oxygen sensor circuit
 Heated oxygen sensor (Sensor 1)
 PCV valve and hose
 EFI relay
 Air induction system
 Fuel pressure
 Injector
 Gas leakage in exhaust system
 ECM

P0136
( 05–100 )Oxygen Sensor Circuit Malfunc-
tion (Bank 1 Sensor 2)
Open or short in heated oxygen sensor circuit
 Heated oxygen sensor (sensor 2)
 Heated oxygen sensor heater (sensor 2)
 EFI relay


–
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–29
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)DTC No.
(See Page) Memory
*1
MIL
Trouble Area
Detection Item
P0171 *4
( 05–106 )System Too Lean (Bank 1)
Air induction system
 Injector blockage
 Mass air flow meter
 Engine coolant temperature sensor
 Fuel pressure
 Gas leakage in exhaust system
 Open or short in heated oxygen sensor (sensor 1) circuit
 Heated oxygen sensor (sensor 1)
 PCV valve and hose
 PCV hose connection
 ECM

P0172 *4
( 05–106 )System Too Rich (Bank 1)
Injector leakage or blockage
 Mass air flow meter
 Engine coolant temperature sensor
 Ignition system
 Fuel pressure
 Gas leakage in exhaust system
 Open or short in heated oxygen sensor (sensor 1) circuit
 Heated oxygen sensor (sensor 1)
 ECM

P0220
( 05–66 )Throttle/Pedal Position Sensor/
Switch ”B” CircuitThrottle position sensor (built into throttle body)
 ECM
P0222
( 05–66 )Throttle/Pedal Position Sensor/
Switch ”B” Circuit Low Input
Throttle position sensor (built into throttle body)
 Short in VTA2 circuit
 Open in VC circuit
 ECM

P0223
( 05–66 )Throttle/Pedal Position Sensor/
Switch ”B” Circuit High Input
Throttle position sensor (built into throttle body)
 Open in VTA2 circuit
 Open in E2 circuit
 VC and VTA2 circuits are short–circuited
 ECM

P0300 *4
( 05– 118 )Random/Multiple Cylinder Misfire
Detected
Open or short in engine wire harness
 Connector connection
 Vacuum hose connection
 Ignition system
 Injector
 Fuel pressure
 Mass air flow meter
 Engine coolant temperature sensor
 Compression pressure
 Valve clearance
 Valve timing
 PCV hose connection
 PCV hose
 ECM
 *2
P0301 *4
( 05– 118 )Cylinder 1 Misfire DetectedSame as DTC P0300 *2
P0302 *4
( 05– 118 )Cylinder 2 Misfire DetectedSame as DTC P0300 *2
P0303 *4
( 05– 118 )Cylinder 3 Misfire DetectedSame as DTC P0300 *2
P0304 *4
( 05– 118 )Cylinder 4 Misfire DetectedSame as DTC P0300 *2
P0325
( 05–132 )Knock Sensor 1 Circuit (Bank 1
or Single Sensor)Open or short in knock sensor circuit
 Knock sensor (under–torqued or looseness)
 ECM


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DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–33
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)DTC No.
(See Page) Memory
*1
MIL
Trouble Area
Detection Item
P2770
( 05–289 )Torque Converter Clutch Sole-
noid Circuit High (Shift Solenoid
Valve SL)
Electronic control automatic transaxle
B2799
(*3)Engine Immobilizer System Mal-
functionImmobilizer system
*1: MIL (Malfunction Indicator Lamp) illuminates.
*2: MIL illuminates or flashes continuously.
*3: See page 05–1625 of Pub. No. RM1018E AVENSIS.
*4: Euro–OBD vehicles

A79123
I13
Ignition Switch
4
6
IE4B–R
IP1 1
1(LHD)
B–R
11B–Y B–R
DHIGN
DA18 2Driver Side J/B
22
EFI
1 AM2
1
1A 1
B–GEngine Room
R/B No.1
Engine Room
J/B No.1 (RHD)
14A
14BEngine Room
J/B No.4
B–G
FL MAIN
BatteryB–W
(LHD)B–W
(LHD)
J8
J/C CC B–W
(RHD)B–W
(RHD)
J/C J26 J27AE
ECM
IGSW
E99
GR
IE12
GR
E104
MREL
44
51
EFI
Relay+B 1
E9 B–R
Engine Room
R/B No.4
Engine Room
R/B No.444
4
4E1 5
E13
IK1 8
1
2
EH
ECW–B
B–RBR B–W
EFI
No.132
B–R
EA1 12
– DIAGNOSTICSSFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–195
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
ECM POWER SOURCE CIRCUIT
CIRCUIT DESCRIPTION
When the ignition switch is turned to ON, the battery voltage is applied to terminal IGSW of the ECM. The
ECM ”MREL” output signal causes a current to flow to the coil, closing the contacts of the EFI relay and sup-
plying power to terminal +B of the ECM.
WIRING DIAGRAM
05KOF–02

A79096
Driver Side J/B:
IGN Fuse
A18294
E01 (–)MREL (+)
ECM Connecter
E13E10
A96024
Engine Room R/B No. 1:
EFI Fuse
– DIAGNOSTICSSFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–197
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
4 CHECK FUSE(IGN FUSE)
(a) Remove the IGN fuse from the driver side J/B.
(b) Check the IGN fuse resistance.
Standard: Below 1 Ω
(c) Reinstall the IGN fuse.
NG CHECK FOR SHORT IN ALL HARNESSES AND
COMPONENTS CONNECTED TO FUSE
OK
CHECK AND REPAIR HARNESS AND CONNECTOR (BATTERY – ECM)
5 INSPECT ECM(MREL VOLTAGE)
(a) Turn the ignition switch to ON.
(b) Measure the voltage between the terminals of the E10
and E13 ECM connectors.
Standard:
Tester ConnectionSpecified Condition
MREL (E10–4) – E01 (E13–7)9 to 14 V
NG REPLACE ECM (See page 10–65 of Pub. No.
RM1018E AVENSIS)
OK
6 CHECK FUSE(EFI FUSE)
(a) Remove the EFI fuse from the engine room R/B No. 1.
(b) Check the EFI fuse resistance.
Standard: Below 1 Ω
(c) Reinstall the EFI fuse.
NG CHECK FOR SHORT IN ALL HARNESSES AND
COMPONENTS CONNECTED TO FUSE
OK

B16200
A66053
Engine Room R/B No. 4:
EFI relay
A65744
MREL E10
ECM Connector
05–198
– DIAGNOSTICSSFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
7 INSPECT EFI RELAY
(a) Remove the EFI relay from the engine room R/B No. 4.
(b) Check the EFI relay resistance.
Standard:
Tester ConnectionSpecified Condition
3 – 510 kΩ or higher
3 – 5Below 1 Ω
(Apply battery voltage to terminals 1 and 2)
(c) Reinstall the EFI relay.
NG REPLACE EFI RELAY
OK
8 CHECK HARNESS AND CONNECTOR(EFI RELAY – ECM, EFI RELAY – BODY
GROUND)
(a) Check the harness and connectors between the EFI relay
and the ECM connector.
(1) Remove the EFI relay from the engine room R/B No.
4.
(2) Disconnect the E10 ECM connector.
(3) Check the resistance.
Standard (Check for open):
Tester ConnectionSpecified Condition
EFI relay (1) – MREL (E10–4)Below 1 Ω
Standard (Check for short):
Tester ConnectionSpecified Condition
EFI relay (1) or MREL (E10–4) – Body ground10 kΩ or higher
(4) Reinstall the EFI relay.
(5) Reconnect the ECM connector.
(b) Check the harness and connector between the EFI relay
and the body ground.
(1) Remove the EFI relay from the engine room R/B No.
4.
(2) Check the resistance.
Standard (Check for open):
Tester ConnectionSpecified Condition
EFI relay (2) – Body groundBelow 1 Ω
(3) Reinstall the EFI relay.
OK REPAIR OR REPLACE HARNESS OR
CONNECTOR
NG
CHECK AND REPAIR HARNESS AND CONNECTOR (TERMINAL +B OF ECM – BATTERY POS-
ITIVE TERMINAL)

05–192
–
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
DTC P2121 THROTTLE/PEDAL POSITION SENSOR/SWITCH ”D” CIRCUIT
RANGE/PERFORMANCE
HINT:
This DTC is related to the accelerator pedal position senso r.
CIRCUIT DESCRIPTION
Refer to DTC P2120 on page 05–184.
DTC No.DTC Detection ConditionTrouble Area
P2121
Conditions (a) and (b) continue for 0.5 seconds:
(a) Difference between VPA1 and VPA2 exceeds the threshold
(b) IDL is OFF Accelerator pedal position sensor circuit
 Accelerator pedal position sensor
 ECM
HINT:
When DTC P2121 is detected, check the output voltage of the accelerator peda\
l position sensor by selecting
Powertrain / Engine and ECT / Data List / Accelerator POS No. 1 and Accelerator POS No. 2 on the int\
elligent
tester ll.
Reference:
Accelerator Pedal Position (Voltage Output)
Trouble AreaAccelerator Pedal ReleasedAccelerator Pedal DepressedTrouble AreaAccelerator POS
No. 1Accelerator POS No. 2Accelerator POS No. 1Accelerator POS No. 2
Normal condition0.5 to 1.1 V1.2 to 2.0 V2.6 to 4.5 V3.4 to 5.0 V
VCP circuit open0 to 0.2 V0 to 0.2 V0 to 0.2 V0 to 0.2 V
VPA circuit open or ground short0 to 0.2 V1.2 to 2.0 V0 to 0.2 V3.4 to 5.0 V
VPA2 circuit open or ground short0.5 to 1.1 V0 to 0.2 V2.6 to 4.5 V0 to 0.2 V
EPA circuit open4.5 to 5.0 V4.5 to 5.0 V4.5 to 5.0 V4.5 to 5.0 V
WIRING DIAGRAM
Refer to DTC P2120 on page 05–184.
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the intelligent tester II. Freeze frame data record the engine condition\
when
malfunctions are detected. When troubleshooting, freeze frame data can h\
elp determine if the vehicle was
moving or stationary, if the engine was warmed up or not, if the air–fuel ratio was lean \
or rich, and other data
from the time the malfunction occurred.
05B5S–05

A71015
0
Accelerator Pedal Opening Angle (deg)125
VPA1 VPA2
5
Movable Range
Usable Range
Usable Range *1
*1
Movable Range
Usable Range
*2
Accelerator pedal released (15
)
Accelerator pedal depressed
(about 100
)
Accelerator Pedal
Position Sensor
Output Voltage (V)
VPA2VPA1 EP2
VCP2
*1:
*
2:
EP1
0.8
105
VCP1*2
*2*1
– DIAGNOSTICSSFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–185
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
CIRCUIT DESCRIPTION
The accelerator pedal position sensor is mounted on the accelerator pedal bracket and it has the 2 sensors
to detect the accelerator position and malfunctions of the accelerator position sensor itself.
In the accelerator pedal position sensor, the voltage applied to pedal terminals VPA1 and VPA2 of the ECM
changes between 0 V and 5 V in proportion to the opening angle of the accelerator pedal. The VPA1 is a
signal to indicate the actual accelerator pedal opening angle which is used for engine control, and the VPA2
is a signal to indicate the information about the opening angle which is used for detecting a malfunction in
the sensor itself.
The ECM judges the current accelerator pedal opening angle with the signals from pedal terminals VPA1
and VPA2, and the ECM controls the throttle motor based on these signals.
HINT:
This ETCS (Electronic Throttle Control System) does not use a throttle cable.

05–186
– DIAGNOSTICSSFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)DTC No.
DTC Detection ConditionTrouble Area
P2120VPA1 quickly fluctuates up and down beyond upper and lower
malfunction thresholds for 0.5 seconds or moreAccelerator pedal position sensor
ECM
P2122
Condition (a) continues for 0.5 seconds or more when acceler-
ator pedal is fully released:
(a) VPA1 is 0.2 V or lessAccelerator pedal position sensor
Open in VCP1 circuit
Open or ground short in VPA1 circuit
ECM
P2123Condition (a) continues for 2.0 seconds or more:
(a) VPA1 is 4.8 V or moreAccelerator pedal position sensor
Open in EPA circuit
ECM
P2125VPA2 quickly fluctuates up and down beyond upper and lower
malfunction thresholds for 0.5 seconds or moreAccelerator pedal position sensor
ECM
P2127
Condition (a) continues for 0.5 seconds or more when acceler-
ator pedal is fully released:
(a) VPA2 is 0.5 V or lessAccelerator pedal position sensor
Open in VCP2 circuit
Open or ground short in VPA2 circuit
ECM
P2128
Conditions (a) and (b) continue for 2.0 seconds or more:
(a) VPA2 is 4.8 V or more
(b) VPA1 is 0.2 V or more and VPA1 is 3.45 V or lessAccelerator pedal position sensor
Open in EPA2 circuit
ECM
P2138
Condition (a) or (b) continues for 2.0 seconds or more:
(a) Difference between VPA1 and VPA2 is 0.02 V or less
(b) VPA1 is 0.2 V or less and VPA2 is 0.5 V or lessVPA1 and VPA2 circuits are short–circuited
Accelerator pedal position sensor
ECM
HINT:
When DTC P2120, P2122, P2123, P2125, P2127, P2128 and/or P2138 is detected, check the output volt-
age of the accelerator pedal position sensor by selecting Powertrain / Engine and ECT / Data List / Accelera-
tor POS No. 1 and Accelerator POS No. 2 on the intelligent tester ll.
Reference:
Accelerator Pedal Position (Voltage Output)
Trouble AreaAccelerator Pedal ReleasedAccelerator Pedal DepressedTrouble AreaAccelerator POS
No. 1Accelerator POS
No. 2Accelerator POS
No. 1Accelerator POS
No. 2
Normal condition0.5 to 1.1 V1.2 to 2.0 V2.6 to 4.5 V3.4 to 5.0 V
VCP circuit open0 to 0.2 V0 to 0.2 V0 to 0.2 V0 to 0.2 V
Open or ground short in VPA1 circuit0 to 0.2 V1.2 to 2.0 V0 to 0.2 V3.4 to 5.0 V
Open or ground short in VPA2 circuit0.5 to 1.1 V0 to 0.2 V2.6 to 4.5 V0 to 0.2 V
EPA circuit open4.5 to 5.0 V4.5 to 5.0 V4.5 to 5.0 V4.5 to 5.0 V
Accelerator pedal position is expressed as voltages.

A96013
A20
Accelerator Pedal
Position Sensor
VPA2
VPA1
EP1 VCP1 VCP2
6
EP2E927ECM
VPA2
VPA
EPA VCPA EPA2 VCP2 4
22
13
64
55
31
(LHD)(RHD)
B (RHD)
W (RHD)
Y (RHD)
B (RHD)
G (RHD)
Y (RHD)G (LHD) W (LHD) W (LHD)
Y (LHD) Y (LHD) B (LHD) B (LHD)
B (LHD)
Y (LHD) Y (LHD) G (LHD) B (LHD)IG2
IG2
IG2
IG2
IG2
IG27
2
3
5
6
1
E928 E922 E926 E929 E923
FI7052DepressedReleased
– DIAGNOSTICSSFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–187
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the intelligent tester II. Freeze frame data record the engine condition when
malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was
moving or stationary, if the engine was warmed up or not, if the air–fuel ratio was lean or rich, and other data
from the time the malfunction occurred.
1 READ VALUE OF INTELLIGENT TESTER II(ACCELERATOR POS NO.1 AND
ACCELERATOR POS NO.2)
(a) Connect the intelligent tester ll to the DLC3.
(b) Turn the ignition switch to ON and turn the intelligent tes-
ter ll ON.
(c) Select the following menu items: Powertrain / Engine and
ECT / Data List / Accelerator POS No. 1 and Accelerator
POS No. 2.
(d) Read the value.
Standard:
Accelerator PedalAccelerator POS No. 1Accelerator POS No. 2
Released0.5 to 1.1 V1.2 to 2.0 V
Depressed2.6 to 4.5 V3.4 to 5.0 V