2005 TOYOTA AVENSIS Service Repair Manual

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Page 4905 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual 05KNS–02
A93652
DLC3
Intelligent Tester ll
A90409
Powertrain
Engine and ECT DTC
Example:
A90410
Clear
Example:
05–18
–
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
AVENSIS RE

Page 4906 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual –
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–19
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
4. CLEAR DTCs AND FREEZE FRAME DATA
(not using the intelligent tester II)
(a)

Page 4907 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual 054KK–23
A66714
E13
E12
E10
E9
– DIAGNOSTICSSFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–13
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
TERMINALS OF ECM
HINT:
Each ECM terminal’s stan

054KK–23
A66714
E13
E12
E10
E9
– DIAGNOSTICSSFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–13
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
TERMINALS OF ECM
HINT:
Each ECM terminal’s standard normal voltage is shown in the table below.
In the table, first follow the information under ”Condition.” Look under ”Symbols (Terminals No.)” for the termi-
nals to be inspected. The standard normal voltage between the terminals is shown under ”STD Voltage.”
Use the illustration above as a reference for the ECM terminals.
Symbols (Terminals No.)Wiring ColorTerminal DescriptionConditionSTD Voltage
BATT (E9–3) – E1 (E13–5)B–Y – BR
Battery (for measuring the
battery voltage and for the
ECM memory)
Always9 to 14 V
+BM (E10–6) – ME01 (E12–3)G–Y – W–BPower source of throttle
motorAlways9 to 14 V
IGSW (E9–9) – E1 (E13–5)B–W – BRIgnition switchIgnition switch ON9 to 14 V
+B (E9–1) – E1 (E13–5)B–R – BRPower source of ECMIgnition switch ON9 to 14 V
MREL (E10–4) – E01 (E13–7)GR – W–BEFI relayIgnition switch ON9 to 14 V
VC (E13–18) – E2 (E13–28)R–W – BRPower source of sensor
(a specific voltage)Ignition switch ON4.5 to 5.5 V
VTA1 (E13–21) – E2 (E13–28)L–W – BRThrottle position sensor
(for engine control)Ignition switch ON, Accelerator ped-
al fully released0.4 to 1.0 V
VTA1 (E13–21) – E2 (E13–28)L–W – BRThrottle position sensor
(for engine control)Ignition switch ON, Accelerator ped-
al fully depressed3.2 to 4.8 V
VTA2 (E13–31) – E2 (E13–28)B–R – BR
Throttle position sensor
(for sensor malfunction
detection)Ignition switch ON, Accelerator ped-
al fully released2.1 to 3.1 V
VTA2 (E13–31) – E2 (E13–28)B–R – BR
Throttle position sensor
(for sensor malfunction
detection)Ignition switch ON, Accelerator ped-
al fully depressed4.5 to 5.0 V
VPA (E9–22) – EPA (E9–28)G – Y
Accelerator pedal position
sensor (for engine con-
trol)Ignition switch ON, Accelerator ped-
al fully released0.5 to 1.1 V
VPA (E9–22) – EPA (E9–28)G – Y
Accelerator pedal position
sensor (for engine con-
trol)Ignition switch ON, Accelerator ped-
al fully depressed2.6 to 4.5 V
VPA2 (E9–23) – EPA2 (E9–29)W – Y
Accelerator pedal position
sensor (for sensor mal-
function detection)Ignition switch ON, Accelerator ped-
al fully released1.2 to 2.0 V
VPA2 (E9–23) – EPA2 (E9–29)W – Y
Accelerator pedal position
sensor (for sensor mal-
function detection)Ignition switch ON, Accelerator ped-
al fully depressed3.4 to 5.0 V

Page 4908 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual 05–14
–
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E) Symbols (Terminals No.)
STD Voltage
Condition
Terminal Description
Wiring Color

05–14
–
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E) Symbols (Terminals No.)
STD Voltage
Condition
Terminal Description
Wiring Color
VCPA (E9–26) – EPA (E9–28)B – Y
Power source of acceler-
ator pedal position sensor
(for VPA)
Ignition switch ON4.5 to 5.0 V
VCP2 (E9–27) – EPA2 (E9–29)B – Y
Power source of acceler-
ator pedal position sensor
(for VPA2)
Ignition switch ON4.5 to 5.0 V
VG (E13–30) – EVG (E13–29)G – L–YMass air flow meterIdling, Shift position P or N, A/C
switch OFF0.5 to 3.0 V
THA (E13–20) – E2 (E13–28)G–R – BRIntake air temperature
sensorIdling, Intake air temperature 20 C
(68 F)0.5 to 3.4 V
THW (E13–19) – E2 (E13–28)B–W – BREngine coolant tempera-
ture sensorIdling, Engine coolant temperature
80 \b0.2 to 1.0 V
#10 (E13–1) – E01 (E13–7)
#20 (E13–2) – E01 (E13–7)
#30 (E13–3) – E01 (E13–7)
#40 (E13–4) – E01 (E13–7)B–R – W–B
Y – W–B
W – W–B
B – W–B
InjectorIgnition switch ON9 to 14 V
#10 (E13–1) – E01 (E13–7)
#20 (E13–2) – E01 (E13–7)
#30 (E13–3) – E01 (E13–7)
#40 (E13–4) – E01 (E13–7)B–R – W–B Y – W–B
W – W–B
B – W–B
InjectorIdlingPulse generation
( See page 05– 118 )
IGT1 (E13–8) – E1 (E13–5)
IGT2 (E13–9) – E1 (E13–5)
IGT3 (E13–10) – E1 (E13–5)
IGT4 (E13–11) – E1 (E13–5)R–W – BR
P – BR
LG–B – BR
L–Y – BR
Ignition coil with igniter
(ignition signal)IdlingPulse generation
( See page 05–143 )
IGF (E13–24) – E1 (E13–5)W–R – BR
Ignition coil with igniter
(ignition confirmation sig-
nal)
Ignition switch ON4.5 to 5.5 V
IGF (E13–24) – E1 (E13–5)W–R – BR
Ignition coil with igniter
(ignition confirmation sig-
nal)
IdlingPulse generation
( See page 05–143 )
G2+ (E13–26) – NE– (E13–34)W – RCamshaft position sensorIdlingPulse generation
( See page 05–140 )
NE+ (E13–27) – NE– (E13–34)G – RCrankshaft position sen-
sorIdlingPulse generation
( See page 05–136 )
FC (E10–16) – E01 (E13–7)G–Y – W–BFuel pump controlIgnition switch ON9 to 14 V
M+ (E12–5) – E01 (E13–7)
M– (E12–4) – E01 (E13–7)B – W–B
W – W–BThrottle actuatorIdlingPulse generation
OX1A (E12–22) – E2 (E13–28)B – BRHeated oxygen sensor
Maintain engine speed at 2,500 rpm
for 2 minutes after warming up the
sensorPulse generation
( See page 05–74 )
OX1B (E10–23)
– E2– (E13–28)B – BRHeated oxygen sensor
Maintain engine speed at 2,500 rpm
for 2 minutes after warming up the
sensorPulse generation
( See page 05–100 )
HT1A (E12–6) – E03 (E12–7)
HT1B (E9–7) – E03 (E12–7)Y – W–B
P – W–BHeated oxygen sensor
heaterIdlingBelow 3.0 V
HT1A (E12–6) – E03 (E12–7)
HT1B (E9–7) – E03 (E12–7)Y – W–B
P – W–BHeated oxygen sensor
heaterIgnition switch ON9 to 14 V
KNK1 (E12–1) – EKNK (E12–2)B – WKnock sensorMaintain engine speed at 4,000 rpm
after warming up the enginePulse generation
( See page 05–132 )
OCV+ (E13–14)
– OCV– (E13–13)W–G – Y–BCamshaft timing oil con-
trol valve (OCV)Ignition switch ONPulse generation
( See page 05–34 )
EVP1 (E12–19) – E01 (E13–7)W–G – W–BEVAP VSVIgnition switch ON9 to 14 V
EVP1 (E12–19) – E01 (E13–7)W–G – W–BEVAP VSVIdlingPulse generation
STA (E13–12) – E1 (E13–5)B–Y – BRStarter signalShift position N, Ignition switch
START6.0 V or more

Page 4909 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual –
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–15
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)Symbols (Terminals No.)
STD Voltage
Condition
Terminal Description
Wiring Color

Page 4910 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual 05JO6–03
–
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–9
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
CHECK FOR INTERMITTENT PROBLEMS
HINT:
Intelligent tester II only:
I

Page 4911 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual 05–106
–
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
DTC P0171 SYSTEM TOO LEAN (BANK 1)
DTC P0172 SYSTEM TOO RICH (BANK 1)
CIRCUI

05–106
–
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
DTC P0171 SYSTEM TOO LEAN (BANK 1)
DTC P0172 SYSTEM TOO RICH (BANK 1)
CIRCUIT DESCRIPTION
The fuel trim is related to the feedback compensation value, not to the bas\
ic injection time. The fuel trim in-
cludes the short–term fuel trim and the long–term fuel trim.
The short–term fuel trim is the short–term fuel compensation used to \
maintain the air–fuel ratio at its ideal
theoretical value. The signal from the heated oxygen sensor indicates whether the air–fuel r\
atio is rich or
lean compared to the ideal theoretical value, triggering a reduction in the \
fuel volume if the air–fuel ratio is
rich, and an increase in the fuel volume if it is lean.
The long–term fuel trim is the overall fuel compensation in order to bal\
ance the short–term fuel trim for a
continual deviation from the central value by individual engine differences, operating environment and age
deterioration.
If both the short–term fuel trim and the long–term fuel trim are l\
ean or rich beyond a standard level, it is de-
tected as a malfunction in the SFI system. The ECM illuminates the MIL and the\
DTC is set.
DTC No.DTC Detection ConditionTrouble Area
P0171
When air–fuel ratio feedback is stable after warming up engine,
fuel trim is considerably in error on lean side
(2 trip detection logic)
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
When air–fuel ratio feedback is stable after warming up engine,
fuel trim is considerably in error on rich side
(2 trip detection logic)
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
HINT:
When DTC P0171 is set, the actual air–fuel ratio is lean. When DTC P0172 is set, the actual air–fuel\

ratio is rich.
If the vehicle runs out of fuel, the air–fuel ratio is lean and DTC P01\
71 may be set. The MIL then illumi-
nates.
If the total of the short–term fuel trim value and long–term fuel trim value is within 20 %, the system
is functioning normally.
WIRING DIAGRAM
Refer to DTC P0130 on page 05–74.
05KO5–02

Page 4912 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual – DIAGNOSTICSSFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–107
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
INSPECTION PROCEDURE
HINT:
Intelligent tester II only:
Malfunctioning areas can

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