2005 TOYOTA AVENSIS diagnostic

A18294
SPD (+)
E1 (–)
E10
ECM Connector
E13
A62954
Turn Wheel
4.5
to 5.5V
0V
05–160
–
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
2 READ VALUE OF INTELLIGENT TESTER II(VEHICLE SPEED)
(a) Connect the intelligent tester ll to the DLC3.
(b) Start the engine and turn the intelligent tester ll ON.
(c) On the intelligent tester ll, select the following menu items: Powertrai\
n / Engine and ECT / Data List / Vehicle SPD.
(d) Check the vehicle speed at the engine speed of 2,000 rpm or more when th\
e vehicle is running. Standard: Same value as the actual vehicle speed.
YES CHECK FOR INTERMITTENT PROBLEMS (See page 05–9 )
NO
3 INSPECT ECM(SPD VOLTAGE)
(a) Shift the transmission gear selector lever to the neutral position.
(b) Jack up the vehicle.
(c) Turn the ignition switch to ON.
(d) Measure the voltage between the terminals of the E10
and E13 ECM connectors as the wheel is turned slowly.
Standard:
Tester ConnectionSpecified Condition
SPD (E10–17) – E1 (E13–5)Generated intermittently
HINT:
The output voltage should fluctuate up and down similarly to the
diagram on the left when the wheel is turned slowly.
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE ECM (See page 10–65 of Pub. No. RM1018E AVENSIS)

A96006
2
EFI
1 1
FL MAINW–BEFI Relay
1 43 5
2
EA1
B–W
V5
EVAP VSV
219
E12
MREL 4
E10 44
44
42 1
B–W
W–G 1 IE1 2
GR13
EC 1 1A
4A
4B1
1
B–G
BatteryB–W
EFI
No. 2 B–Y
B–G
EVP1ECM
Engine
Room
R/B No.1Engine
Room
R/B No.4 Engine Room R/B No.4
GR
– DIAGNOSTICSSFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–155
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
DTC P0443 EVAPORATIVE EMISSION CONTROL
SYSTEM PURGE CONTROL VALVE CIRCUIT
CIRCUIT DESCRIPTION
In order to reduce hydrocarbon (HC) emissions, evaporated fuel from the fuel tank is routed through the char-
coal canister to the intake manifold for combustion in the cylinders.
The ECM changes the duty signal to the EVAP VSV so that the intake 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 (1 trip
detection logic)Open or short in EVAP VSV circuit
EVAP VSV
ECM
WIRING DIAGRAM
05KO8–02

A80362
VSV is ON VSV is OFFE
F
E
F
Air
A18294
E13
ECM Connector
E01
EVP1E12
05–156
–
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
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.
1 PERFORM ACTIVE TEST USING INTELLIGENT TESTER II(EVAP VSV)
(a) Disconnect the vacuum hose of the EVAP VSV.
(b) Connect the intelligent tester II to the DLC3.
(c) Start the engine and turn the intelligent tester II ON.
(d) Select the following menu items: Powertrain / Engine and ECT / Active Test / Purge VSV. Press the right or left but-
ton.
(e) Check if the disconnected port applies suction to your fin-
ger when operating the EVAP VSV using the intelligent
tester II.
Standard:
Tester OperationSpecified Condition
VSV is ONApplies suction to your finger
VSV is OFFApplies no suction to your finger
(f) Reconnect the vacuum hose.
OK CHECK FOR INTERMITTENT PROBLEMS (See page 05–9 )
NG
2 INSPECT ECM(CHECK VOLTAGE)
(a) Turn the ignition switch to ON.
(b) Measure the voltage between the terminals of the E12 and E13 ECM connectors.
Standard:
Tester ConnectionSpecified Condition
EVP1 (E12–19) – E01 (E13–7)9 to 14 V
OK REPLACE ECM (See page 10–65 of Pub. No. RM1018E AVENSIS)
NG
3 INSPECT VACUUM SWITCHING VALVE(OPERATION OF EVAP VSV)
OK: Air flows when the battery voltage is applied to the EVAP VSV. NG REPLACE VACUUM SWITCHING VALVE
OK

A65745
E12
EVP1 ECM Connector
0A52933
Wire Harness Side:
EVAP VSV Connector
V5
A66053
Engine Room R/B No. 4:EFI Relay
0A52933
Wire Harness Side:
EVAP VSV Connector
V5
–
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–157
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
4 CHECK HARNESS AND CONNECTOR(ECM – EVAP VSV)
(a) Disconnect the E12 ECM connector.
(b) Disconnect the V5 EVAP VSV connector.
(c) Check the resistance.
Standard (Check for open):
Tester ConnectionSpecified Condition
EVAP VSV (V5–2) – EVP1 (E12–19)Below 1 Ω
Standard (Check for short):
Tester ConnectionSpecified Condition
EVAP VSV (V5–2) or PRG (E12–19) – Body ground10 kΩ or higher
(d) Reconnect the ECM connector.
(e) Reconnect the EVAP VSV connector.
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
5 CHECK HARNESS AND CONNECTOR(EFI RELAY – EVAP VSV)
(a) Remove the EFI relay from the engine room R/B No. 4.
(b) Disconnect the V5 EVAP VSV connector.
(c) Check the resistance. Standard (Check for open):
Tester ConnectionSpecified Condition
EVAP VSV (V5–1) – EFI relay (3)Below 1 Ω
Standard (Check for short):
Tester ConnectionSpecified Condition
EVAP VSV (V5–1) or EFI relay (3) – Body ground10 kΩ or higher
(d) Reinstall the EFI relay
(e) Reconnect the EVAP VSV connector.
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
INSPECT ECM POWER SOURCE CIRCUIT ( See page 05–195)

A83860
Waveform of Heated
Oxygen Sensor
(in front of TWC)Waveform of Heated
Oxygen Sensor
(behind TWC)
Waveform of Heated
Oxygen Sensor
(behind TWC) Normal Catalyst
Deteriorated Catalyst Waveform of Heated
Oxygen Sensor
(in front of TWC) 05–150
– DIAGNOSTICSSFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
DTC P0420 CATALYST SYSTEM EFFICIENCY BELOW
THRESHOLD (BANK 1)
CIRCUIT DESCRIPTION
This vehicle has two Heated Oxygen (O2) sensors. One is located in front of the Three–Way Catalyst Con-
verter (TWC), and the other is mounted behind the TWC. Each signal output of the sensors is converted into
a waveform inside the ECM. The front O2 sensor is used to monitor the air–fuel ratio by the ECM, and whose
signal prompts the ECM to perform air–fuel ratio feedback control. As a result, the air–fuel ratio is balanced,
and the waveform of the front O2 sensor oscillates between rich and lean regularly.
To determine whether or not the catalyst performance has deteriorated, the ECM compares the waveforms
of the front and rear O2 sensors. While the catalyst is functioning normally, the waveform of the rear O2 sen-
sor fluctuates between rich and lean more slowly than the front O2 sensor’s waveform. When the rear O2
sensor ’s waveform frequently fluctuates, it indicates that the catalyst performance deteriorates.
05KO7–02

A82718
Signal Length
Time
Sensor
Output
Voltage
Heated Oxygen Sensor Signal Length:
A58686
Vehicle Speed
70 km/h
(44 mph)
Ignition Switch OFF 40 seconds
or more
Engine coolant temperature is more than 75
C (167 F)
20 seconds
or more 40 seconds
or more
40 seconds
or more
(g) (h)
Idling (e) (g)
(h) (g)
(h)
20 seconds
or more 20 seconds
or more
Once
Twice
At least 8 times
2 minutes
or more
(a), (b) and (c)
–
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–151
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)DTC No.
DTC Detecting ConditionTrouble Area
P0420
After engine and TWC are warmed up, and while vehicle is
driven within predetermined vehicle speed and engine speed
range:
Waveforms of heated oxygen sensor (sensor 2) frequently
fluctuates between rich and lean (2 trip detection logic)
Gas leakage in exhaust system
 Heated oxygen sensor (sensor 1)
 Heated oxygen sensor (sensor 2)
 Three–way catalytic converter (TWC)
CONFIRMATION DRIVING PATTERN
(a) Connect the intelligent tester II to the DLC3.
(b) Turn the ignition switch to ON and turn the intelligent tester ll ON.
(c) Switch the ECM from normal mode to check mode using the intelligent test\
er ll ( see page 05–20).
(d) Start the engine.
(e) Allow the engine to idle for 2 minutes.
(f) Warm up the engine until the engine coolant temperature reaches more than\
75 C (167 F).
(g) Drive the vehicle at 70 km/h (44 mph) or more for 40 seconds or more.
(h) Stop the vehicle and allow the engine to idle for 20 seconds or more.
(i) Repeat the steps (g) and (h) at least 8 times in one driving cycle.
HINT:
If a malfunction exists, the MIL will be illuminated during step (i).

05–152
–
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
NOTICE:
If the conditions in this test are not strictly followed, no malfunction\
will be detected. If you do not
have the intelligent tester II, turn the ignition switch to OFF after perfor\
ming steps from (d) to (i), then
perform steps (d) to (i) again.
WIRING DIAGRAM
Refer to DTC P0130 on page 05–74.
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.
1 CHECK OTHER DTC OUTPUT(IN ADDITION TO DTC P0420)
(a) Connect the intelligent tester II to the DLC3.
(b) Turn the ignition switch to ON and turn the intelligent tester ll ON.
(c) Select the following menu items: Powertrain / Engine and ECT / DTC.
(d) Read DTCs.
Result:
Display (DTC Output)Proceed To
P0420A
P0420 and other DTCsB
HINT:
If any DTCs other than P0420 are output, troubleshoot those DTCs first.
B GO TO RELEVANT DTC CHART (See page 05–27 )
A
2 CHECK FOR EXHAUST GAS LEAKAGE
OK: No gas leakage. NG REPAIR OR REPLACE EXHAUST GASLEAKAGE POINT
OK
3 INSPECT HEATED OXYGEN SENSOR(SENSOR 1) ( See page 05–74)
NG REPLACE HEATED OXYGEN SENSOR
OK

–
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–153
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
4 INSPECT HE ATED OXYGEN SENSOR(SENSOR 2) ( See page 05–100)
OK: During air–fuel ratio feedback, the oxygen sensor output fluctuat\
es between rich and lean.
NG REPLACE HEATED OXYGEN SENSOR
OK
REPLACE THREE–WAY CATALYTIC CONVERTER (BOTH FRONT AND REAR TWC)
NOTICE:
On the damaged bank, replace both the front and rear catalysts.
HINT:
Intelligent tester II only:
Malfunctioning areas can be found by performing the Active Test / A/F Control operation. The A/F Control
operation can determine if the heated oxygen sensor or other potential trouble ar\
eas are malfunctioning or
not.
(a) Perform the Active Test using the intelligent tester II.
HINT:
The A/F Control operation lowers the injection volume by 12.5 % or incre\
ases the injection volume by 25
%. (1) Connect the intelligent tester II to the DLC3.
(2) Start the engine and turn the intelligent tester II ON.
(3) Warm up the engine by running the engine at 2,500 rpm for approximately 3\
minutes.
(4) On the intelligent tester II, select the following menu items: Powertrain \
/ Engine and ECT / ActiveTest / A/F Control.
(5) Select the following monitor items: O2S B1 S1 and O2S B1 S2.
(6) Perform the A/F Control operation with the engine in an idling condition\
(press the right or left
button).
Result:
The heated oxygen sensor reacts in accordance with increases and decreases \
of the injection
volume:
+25 % → Rich output: More than 0.5 V
–12.5 % → Lean output: Less than 0.4 V
NOTICE:
Sensor 1 (front sensor) has an output delay of a few seconds. Sensor 2 (rea\
r sensor) has a maximum
output delay of approximately 20 seconds.