TOYOTA AVENSIS 2005 Service Repair Manual

A54292
T1
Throttle Control Motor
(Built in Throttle Body)
2
1B
WECM
3
2
17M+
M±
E11
(Shielded)
E11
E11
GE01
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±483
AVENSIS REPAIR MANUAL (RM1018E)
DTC P2102 THROTTLE ACTUATOR CONTROL MOTOR
CIRCUIT LOW
DTC P2103 THROTTLE ACTUATOR CONTROL MOTOR
CIRCUIT HIGH
CIRCUIT DESCRIPTION
The throttle motor is operated by the ECM and it opens and closes the throttle valve.
The opening angle of the throttle valve is detected by the throttle position sensor which is mounted on the
throttle body. It provides feedback to the ECM to control the throttle motor in order to regulate the throttle
valve opening angle properly in response to the driving condition.
If this malfunction is detected, the ECM shuts down the power for the throttle motor, and the throttle valve
is closed by the return spring. And the throttle valve is locked at a certain opening angle. Also, the whole
electronically controlled throttle operation is cancelled until the system returns to normal and the ignition
switch is turned OFF.
HINT:
This electrical throttle system does not use the throttle cable.
DTC No.DTC Detection ConditionTrouble Area
P2102
Conditions (a) and (b) continue for 2.0 seconds:
(a) Throttle control motor output duty greater than 80 %
(b) Throttle control motor current less than 0.5 A
Open in throttle control motor circuit

Throttle control motor

ECM
Throttle control motor current greater than 10 A
Short in throttle control motor circuit
P2103Condition (a) continues for 0.6 seconds:
(a) Throttle control motor current greater than 7 A
Short in throttle control motor circuit

Throttle control motor

ECM
WIRING DIAGRAM
05CKP±01

A59778M±
M+
Component Side
Throttle Body
T1
B53781
Wire Harness Side Throttle Body Connector
M± M+
T1
A54408ECM Connector
M±
M+ E11
05±484
±
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.
1INSPECT THROTTLE BODY ASSY(RESISTANCE OF THROTTLE CONTROL MOTOR)
(a)Disconnect the T1 throttle body connector.
(b)Measure the motor resistance between terminals M+ and
M±.
Motor resistance: 0.3 to 100
at 20
C (68
F)
NGREPLACE THROTTLE BODY ASSY (See page 10±44)
OK
2CHECK HARNESS AND CONNECTOR(THROTTLE CONTROL MOTOR ± ECM)
(a)Disconnect the T1 throttle body connector.
(b)Disconnect the E11 ECM connector.
(c)Check for continuity between the wire harness side con- nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
M+ (T1±2) ± M+ (E11±3)ContinuityM± (T1±1) ± M± (E11±2)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
M+ (T1±2) or M+ (E11±3) ± Body groundNocontinuityM± (T1±1) or M± (E11±2) ± Body groundNo continuity
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK AND REPLACE ECM (See page 01±32)

A76875
ECM
SCV 5
E13 EFI Relay
1 1 23
Engine Room
J/B No. 4B±W
1MREL 8
E9
Battery FL MAIN B±G2 5
GR
V6
VSV (Intake Air Control Valve)
2
L±B 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 05±480
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
DTC P2008 INTAKE MANIFOLD RUNNER CONTROL
CIRCUIT / OPEN (BANK 1)
CIRCUIT DESCRIPTION
The Intake Air Control valve (IACV) is opened and shut by the actuator with intake manifold vacuum.
It stabilizes the engine combustion. The IACV operation generates swirl air flow in the cylinder.
DTC No.DTC Detection ConditionTrouble Area
P2008Open or short in VSV for IACV circuit 0.5 sec. or more
(2 trip detection logic)
Open of short in VSV for IACV circuit

VSV for IACV

ECM
WIRING DIAGRAM
05CK5±01

A81701VSV is ONVSV is OFFE
F E
F Air
Air
A76903
E1 (±)
SCV (+)
ECM Connector
E13
E11
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
05±481
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 IACV)
(a)Disconnect the vacuum hose from the VSV for IACV.
(b)Turn the ignition switch ON.
(c)Select the item ºDIAGNOSIS / OBD/MOBD / ACTIVE
TEST / SCV VSVº (press the right or left button).
(d)Check the VSV for IACV operation when it is operated by the hand±held tester.
Standard:
Tester operationSpecified condition
VSV is ONAir from port E flows out through port F.
VSV is OFFAir does not flow from port E to port F.
NGGo to step 2
OK
CHECK FOR INTERMITTENT PROBLEMS
2INSPECT VACUUM SWITCHING VALVE ASSY NO.1(VSV FOR IACV) (See page 13±2)
NGREPLACE VACUUM SWITCHING VALVE ASSY
NO.1 (VSV FOR IACV)
OK
3INSPECT ECM(SCV VOLTAGE)
(a)Turn the ignition switch ON.
(b)Measure the voltage between the specified terminals of the E11 and E13 ECM connectors.
Standard:
Symbols (Terminal No.)Specified condition
SCV (E13±5) ± E1 (E11±1)9 to 14 V
NGGo to step 4
OK
CHECK AND REPLACE ECM (See page 01±32)

A81699SCV
E13ECM Connector
A56870
Wire Harness Side
VSV for IACV Connector
V6
A66053
Engine Room R/B No. 4EFI Relay
A56870
Wire Harness Side
VSV for IACV Connector
V6
05±482
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
4CHECK HARNESS AND CONNECTOR(ECM ± VSV FOR IACV)
(a)Disconnect the V6 VSV for IACV connector.
(b)Disconnect the E13 ECM connector.
(c)Check for continuity between the wire harness side con- nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
VSV for IACV (V6±2) ± SCV (E13±5)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
VSV for IACV (V6±2) or SCV (E13±5) ± Body groundNo continuity
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
5CHECK HARNESS AND CONNECTOR(EFI RELAY ± VSV FOR IACV)
(a)Inspect the EFI No. 2 fuse. (1)Remove the EFI No. 2 fuse from the engine roomR/B No. 4.
(2)Check the continuity of the EFI No. 2 fuse.
Standard: Continuity
(b)Remove the EFI relay from the engine room R/B No. 4.
(c)Disconnect the V6 VSV for IACV connector.
(d)Check for continuity between the wire harness side con- nector.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
VSV for IACV (V6±1) ± EFI relay (3)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
VSV for IACV (V6±1) or EFI relay (3) ± Body groundNo continuity
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK FOR ECM POWER SOURCE CIRCUIT (See page 05±502)

A76876
ECM
J13G
FP+ 6
R
E12
D(Shielded)
J13 E
J12 E J12D
BRBR
EEJ/C21 S3
Fuel Pump
(High Pressure)
(Spill Valve)
G
FP± 3
E12
(Shielded) BR
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±477
AVENSIS REPAIR MANUAL (RM1018E)
DTC P1235 HIGH PRESSURE FUEL PUMP CIRCUIT
CIRCUIT DESCRIPTION
The fuel pump (high pressure) is an electronically controlled plunger type fuel pump (high pressure) which
is driven by the cam provided on the intake cam shaft rear end on the cylinder head.
The fuel pump (high pressure) increases the pressure of the fuel fed from the fuel pump (low pressure) in
the fuel tank at 8 to 13 MPa (81.6 to 132.6 kgf/cm
2, 1,160 to 1,885 psi) according to the operating condition,
and it feeds the fuel to the fuel delivery pipe.
DTC No.DTC Detection conditionTrouble Area
O h ti f l (hi h ) i itf 1
Open or short in fuel pump (high pressure)
P1235Open or short in fuel pump (high pressure) circuit for 1sec. or
more

Oen or short in fuel um (high ressure)

Fuel pump (high pressure)P1235moreFuel um (high ressure)

ECM
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data using hand±held tester. Freeze frame data records the engine conditions when the
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.
05CK4±01


B12608
A76903
E12
ECM Connector
FP+
FP± E1
E11
A14558
Normal Signal Waveforms
5 msec./Division 10 V/
Division
GND FP±
FP+
05±478
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
1CHECK OPERATION OF FUEL PUMP(HIGH PRESSURE)
(a)With the engine running or cranking, use a sound scope to check that there is the normal operating sounds of the
fuel pump (high±pressure) when it is operated.
Standard:
There is the operating sounds of the fuel pump (high±
pressure).
NGREPLACE FUEL PUMP (HIGH PRESSURE)
OK
2INSPECT ECM(FP+ AND FP± VOLTAGE)
(a)Turn the ignition switch ON, and check the waveforms be- tween terminals FP+ and E1, and FP± and E1 of the E11
and E12 ECM connectors.
HINT:
The correct waveform is as shown in the illustration.
NGCHECK AND REPLACE ECM (See page 01±32)
OK
3CHECK FUEL PUMP(HIGH PRESSURE) (See page 11±33)
NG REPLACE FUEL PUMP(HIGH PRESSURE)
OK

A81695
E12
ECM Connector FP+FP±
A81702
S3
Fuel Pump Connector
(High Pressure) Wire Harness Side
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±479
AVENSIS REPAIR MANUAL (RM1018E)
4 CHECK HARNESS AND CONNECTOR(FUEL PUMP (HIGH PRESSURE) ± ECM)
(a) Disconnect the E12 ECM connector.
(b) Disconnect the S3 fuel pump (high pressure) connector.
(c) Check for continuity between the wire harness side con-
nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
FP+ (E12±6) ± Fuel pump (S3±1)ContinuityFP± (E12±3) ± Fuel pump (S3±2)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
FP+ (E12±6) or Fuel pump (S3±1) ± Body groundNo continuityFP± (E12±3) or Fuel pump (S3±2) ± Body groundNo continuity
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
CHECK FOR INTERMITTENT PROBLEMS

054JF±04
±
DIAGNOSTICS ECD SYSTEM (1CD±FTV)
05±551
AVENSIS REPAIR MANUAL (RM1018E)
PROBLEM SYMPTOMS TABLE
When the malfunction code is not confirmed the DTC check and the problem sti\
ll can not be confirmed in
the basic inspection, then proceed to this step and perform troubleshooting\
according to the numbered order
given in the table below.
SymptomSuspect AreaSee page
Does not crank (Difficult to start)
2. Starter
3. Starter relay
4. Engine coolant temperature sensor19±22
19±22
10±56
Difficult to start with a cold engine
1. STA signal circuit
2. Injector
3. Fuel filter
4. Compression
5. EC

6. Supply pump
7. Fuel pressure sensor
8. Diesel throttle
9. Glow plug system05±691 11±56
11±82
14±266 10±56
10±56
10±56
10±56
10±56
Difficult to start with a warm engine
1. STA signal circuit
2. Injector
3. Fuel filter
4. Compression
5. EC

6. Supply pump
7. Fuel pressure sensor
8. Diesel throttle05±691 11±56
11±82
14±266 10±56
10±56
10±56
10±56
Engine stalls soon after starting
1. Fuel filter
2. Injector
3. EC
power source circuit
4. EC

5. Supply pump
6. Fuel pressure sensor
7. Diesel throttle11±82
11±56
05±686 10±56
10±56
10±56
10±56
Engine stalls (Other than conditions listed abobe)
1. EC
power source circuit
2. Injector
3. EC

4. Supply pump
5. Fuel pressure sensor
6. Diesel throttle05±686 11±56
10±56
10±56
10±56
10±56
Incorrect first idle (Poor idling)
1. Fuel filter
2. Injector
3. EC

4. Supply pump
5. Fuel pressure sensor11±82
11±56
10±56
10±56
10±56
High engine idle speed (Poor idling)
1. A/C signal circuit
2. Injector
3. STA signal circuit
4. EC

5. Supply pump
6. Fuel pressure sensor55±3
11±56
05±691 10±56
10±56
10±56

05±552
±
DIAGNOSTICS ECD SYSTEM (1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
Lower engine idle speed (Poor idling)
1. A/C signal circuit
2. Injector
3. EGR system
4. Compression
5. Valve clearance
6. Fuel line (Air bleed)
7. EC


8. Supply pump
9. Fuel pressure sensor
10.Diesel throttle55±3
11±56
12±16
14±266
14±270 ±
10±56
10±56
10±56
10±56
Rough idling (Poor idling)
1. Injector
2. Fuel line (Air bleed)
3. EGR system
4. Compression
5. Valve clearance
6. EC

7. Supply pump
8. Fuel pressure sensor
9. Diesel throttle11±56 ±
12±16
14±266
14±270 10±56
10±56
10±56
10±56
Hunting at hot engine (Poor idling)
1. Injector
2. EC
power source circuit
3. Compression
4. Fuel line (Air bleed)
5. Valve clearance
6. EC

7. Supply pump
8. Fuel pressure sensor
9. Diesel throttle11±56
05±686
14±266 ±
14±270
10±56
10±56
10±56
10±56
Hunting at cold engine (Poor idling)
1. Injector
2. EC
power source circuit
3. Compression
4. Fuel line (Air bleed)
5. Valve clearance
6. EC

7. Supply pump
8. Fuel pressure sensor
9. Diesel throttle11±56
05±686
14±266 ±
14±270
10±56
10±56
10±56
10±56
Hesitation/ Poor acceleration (Poor driveability)
1. Injector
2. Fuel filter
3. EGR system
4. Compression
5. EC

6. Supply pump
7. Fuel pressure sensor
8. Diesel throttle11±56
11±82
12±16
14±266 10±56
10±56
10±56
10±56
Knocking (Poor driveability)
1. Injector
2. EGR system
3. EC

4. Supply pump
5. Fuel pressure sensor11±56
12±16
10±56
10±56
10±56
Black smoke (Poor driveability)
1. Injector
2. EGR system
3. EC

4. Supply pump
5. Fuel pressure sensor
6. Diesel throttle11±56
12±16
10±56
10±56
10±56
10±56