TOYOTA AVENSIS 2005 Service Repair Manual

A56986
Wire Harness SideStop Light Switch Connector
S13
A67404
STP
E10
ECM Connector
ST1±
05±458
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
4CHECK HARNESS AND CONNECTOR(ECM ± STOP LIGHT SWITCH)
(a)Disconnect the S13 stop light switch connector.
(b)Disconnect the E10 ECM connector.
(c)Check for continuity between the wire harness side con- nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
Stop light switch (S13±1) ± STP (E10±19)ContinuityStop light switch (S13±4) ± ST1± (E10±12)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
Stop light switch (S13±1) or STP (E10±19) ± Body groundNocontinuityStop light switch (S13±4) or ST1± (E10±12) ± Body ground\
No continuity
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK AND REPLACE ECM (See page 01±32)

A81703
From
Speed SensorSkid
Control
ECU4±Pulse
Combination
MeterECM 4±Pulse
A76866
Combination MeterECM
C11V±W
SPD 17
V±W
E10 J/C
18 H
J10
(LHD)J20H
(RHD)H
J10
(LHD)J20H
(RHD)
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±453
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0500 VEHICLE SPEED SENSOR ºAº
CIRCUIT DESCRIPTION
The speed sensor for skid control ECU detects the wheel speed and sends the appropriate signals to the
skid control ECU.
The skid control ECU converts these signals into a 4±pulse signal and outputs it to the combination meter.
After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit in-
side the combination meter,it is then transmitted to the ECM. The ECM determines the vehicle speed based
on the frequency of these pulse signals.
DTC No.DTC Detection ConditionTrouble Area
P0500
No vehicle speed sensor signal to ECM under the following
condition (1 trip (A/T) or 2 trip (M/T) detection logic):
(a) Vehicle is being driven

Combination meter

Open or short in speed sensor circuit

Vehicle speed sensor

ECM

Skid control ECU

Clutch or brake slips or gear is broken
WIRING DIAGRAM
05CJ6±01

A59661
E01 (±)SPD (+)
ECM Connector
E13
E10
A81704
4.5 to
5.5V
0V Turn Wheel
05±454
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
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 OPERATION OF SPEEDOMETER
(a)Drive the vehicle and check if the operation of the speedometer in the combination meter is normal.
HINT:
The vehicle speed sensor is operating normally if the speedometer displa\
y is normal. NGCHECK SPEEDOMETER CIRCUIT (See page 05±1510)
OK
2INSPECT ECM(SPD VOLTAGE)
(a)Shift the lever to the neutral position.
(b)Jack up the vehicle.
(c)Turn the ignition switch ON.
(d)Measure the voltage between the specified terminals of the E10 and E13 ECM connectors as the wheel is turned
slowly.
Standard:
Symbols (Terminal No.)Specified condition
SPD (E10±17) ± E01 (E13±7)Generated intermittently
HINT:
The output voltage should fluctuate ups and downs similarly to
the diagram on the left as the wheel is turned slowly.
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK AND REPLACE ECM (See page 01±32)

A76875
ECM
EVP1 34
E13 EFI Relay
1 1 23
Engine Room
J/B No. 4B±W
1MREL 8
E9
Battery FL MAIN B±G2 5
GR
V5
VSV (EVAP)
2
W±G EFI No. 2 1
B±G
W±B
ECW±B
4A
14B11AEFI
1B±Y
1
2 4
4
44
4
4
B±W Engine Room
R/B No. 1
and
Engine Room
J/B No. 1Engine Room R/B No. 4
GR
B±W
EA113IE1 2
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±449
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0443 EVAPORATIVE EMISSION CONTROL
SYSTEM PURGE CONTROL VALVE CIRCUIT
CIRCUIT DESCRIPTION
To reduce HC emissions, evaporated fuel from the fuel tank is routed through the charcoal canister to the
intake manifold for combustion in the cylinders.
The ECM changes the duty signal to the VSV for the EVAP so that the intake quantity of HC emissions is
appropriate for the driving conditions (engine load, engine speed, vehicle speed, etc.) after the engine is
warmed up.
DTC No.DTC Detection ConditionTrouble Area
P0443Proper response to ECM command does not occur

Open of short in VSV circuit for EVAP

VSV for EVAP

ECM
WIRING DIAGRAM
05CK6±01

A81705
VSV is ONAirVSV is OFF
A76903
EVP1 (+)
ECM Connector
E13
E01 (±)
05±450
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
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.
1PERFORM ACTIVE TEST BY HAND±HELD TESTER(VSV FOR EVAP)
(a)Disconnect the vacuum hose from the VSV for EVAP.
(b)Start the engine.
(c)Select the item ºDIAGNOSIS / OBD/MOBD / ACTIVE TEST / EVAP VSVº (press the right or left button).
(d)When the VSV for EVAP is operated by the hand±held tester, check whether the disconnected hose applies suc-
tion to your finger.
Standard:
Tester operationSpecified condition
VSV is ONDisconnected hose applies suction to your finger
VSV is OFFDisconnected hose applies no suction to your finger
OKCHECK FOR INTERMITTENT PROBLEMS
NG
2INSPECT VACUUM SWITCHING VALVE ASSY NO.1(VSV FOR EVAP) (See page 12±13)
NG REPLACE VACUUM SWITCHING VALVE ASSY
NO.1 (VSV FOR EVAP)
OK
3 INSPECT ECM(EVP1 VOLTAGE)
(a) Turn the ignition switch ON.
(b) Measure the voltage between the specified terminals of the E13 ECM connector.
Standard:
Symbols (Terminal No.)Specified condition
EVP1 (E13±34) ± E01 (E13±7)9 to 14 V
OK CHECK AND REPLACE ECM (See page 01±32)
NG

A81699EVP1
E13
ECM Connector

A52933
Wire Harness Side
VSV for EVAP Connector
V5
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±451
AVENSIS REPAIR MANUAL (RM1018E)
4 CHECK HARNESS AND CONNECTOR(ECM ± VSV FOR EVAP)
(a) Disconnect the E13 ECM connector.
(b) Disconnect the V5 VSV for EVAP connector.
(c) Check for continuity between the wire harness side con-
nector.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
VSV for EVAP (V5±2) ± EVP1 (E13±34)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
VSV for EVAP (V5±2) or EVP1 (E13±34) ± Body groundNo continuity
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK

A66053
Engine Room R/B No. 4EFI Relay

A52933
Wire Harness SideVSV for EVAP Connector
V5
05±452
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
5CHECK HARNESS AND CONNECTOR(EFI RELAY ± VSV FOR EVAP)
(a)Inspect the EFI No. 2 fuse. (1)Remove the EFI No. 2 fuse from the engine room
R/B No. 4.
(2)Check for continuity in the EFI No. 2 fuse.
Standard: Continuity
(b)Remove the EFI relay from the engine room R/B No. 4.
(c)Disconnect the V5 VSV for EVAP connector.
(d)Check for continuity between the wire harness side con- nector.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
EFI relay (3) ± VSV for EVAP (V5±1)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
EFI relay (3) or VSV for EVAP (V5±1) ± Body groundNo continuity
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK FOR ECM POWER SOURCE CIRCUIT (See page 05±502)

A54278
Waveform of Heated Oxygen
Sensor before CatalystNormal CatalystWaveform of Heated
Oxygen Sensor
after Catalyst
05±446
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0420 CATALYST SYSTEM EFFICIENCY BELOW
THRESHOLD (BANK 1)
DTC P0430 CATALYST SYSTEM EFFICIENCY BELOW
THRESHOLD (BANK 2)
CIRCUIT DESCRIPTION
The ECM compares the waveform of the heated oxygen sensor located before the catalyst with the wave-
form of the heated oxygen sensor located after the catalyst to determine whether or not the catalyst perfor-
mance has deteriorated.
The air±fuel ratio feedback compensation keeps the waveform of the heated oxygen sensor before the cata-
lyst repeatedly changing back and forth from rich to lean.
If the catalyst is functioning normally, the waveform of the heated oxygen sensor after the catalyst switches
back and forth between rich and lean much more slowly than the waveform of the heated oxygen sensor
before the catalyst.
But when both waveforms change at a similar rate, it indicates that the catalyst performance has deterio-
rated.

DTC No.DTC Detection ConditionTrouble Area
P0420
P0430
After engine and catalyst are warmed up, and while vehicle is
driven within set value and engine speed range, waveforms of
heated oxygen sensors have the same amplitude
(2 trip detection logic)
Gas leakage in exhaust system

Heated oxygen sensor

Three±way catalytic converter (inside exhaust manifold)
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.
05CKM±01

A54279
Engine Speed
2,500 to 3,000 rpm
Idling
IG SW OFF(a)
Time Warming up 3 min. or so Check (b)(c)
(d)
A54280
OX Signal Waveform (Oscilloscope)
1.0 V
0 V
0.2 sec./Division
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±447
AVENSIS REPAIR MANUAL (RM1018E)
CONFIRMATION ENGINE RACING PATTERN
(a) Connect the hand±held tester to the DLC3, or connect the probe of the oscilloscope between terminals
OX1A, OX2A, OX1B or OX2B and E2 of the ECM connectors.
(b) Start the engine and warm it up with all the accessories switched OFF until the engine coolant tempera-
ture is stable.
(c) Run the engine at 2,500 to 3,000 rpm for about 3 minutes.
(d) After confirming that the waveforms of the heated oxygen sensor (bank 1, 2 sensor 1 (OX1A, OX2A))
which oscillates around 0.5 V during feedback to the ECM, check the waveform of the heated oxygen
sensor (bank 1, 2 sensor 2 (OX1B, OX2B)).
HINT:
If there is a malfunction in the system, the waveform of the
heated oxygen sensor (bank 1, 2 sensor 2 (OX1B, OX2B)) is
almost the same as that of the heated oxygen sensor (bank 1,
2 sensor 1 (OX1A, OX2A)) on the left.
There are some cases where, even though a malfunction ex-
ists, the CHK ENG may either light up or not light up.
INSPECTION PROCEDURE
HINT:
Read freeze frame data using
 
 

 reeze 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 mal-
function.

05±448
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
1CHECK OTHER DTC OUTPUT(IN ADDITION TO P0420 AND/OR P0430)
(a)Read the DTC using the hand±held tester. Result:
Display (DTC output)Proceed to
Only ºP0420 and/or P0430º are outputA
ºP0420 or P0430º and other DTCs are outputB
HINT:
If any other codes besides ºP0420 and/or P0430º are output, perform \
the troubleshooting for those DTCs
first.
BGO TO RELEVANT DTC CHART (See page 05±309)
A
2CHECK FOR EXHAUST GAS LEAKS
NGREPAIR OR REPLACE EXHAUST GAS LEAKAGE POINT
OK
3CHECK HEATED OXYGEN SENSOR(BANK 1, 2 SENSOR 1) (See page 05±363)
NG REPLACE HEATED OXYGEN SENSOR
OK
4CHECK HEATED OXYGEN SENSOR(BANK 1, 2 SENSOR 2) (See page 05±388)
NG REPLACE HEATED OXYGEN SENSOR
OK
REPLACE THREE±WAY CATALYTIC CONVERTER (EXHAUST MANIFOLD)