TOYOTA AVENSIS 2005 Service Repair Manual

±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
05±463
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
HINT:
Read freeze frame data using
\b\b
\b 
\f
reeze 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 OTHER DTC OUTPUT(IN ADDITION TO P0556)
(a)Read the DTC using the hand±held tester. Result :
DisplayProceed to
Only ºP0556º is output.A
ºP0556º and other DTCs are output.B
HINT:
If any other codes besides ºP0556º are output, perform the troublesh\
ooting for those DTCs first.
BGO TO RELEVANT DTC CHART(See page 05±309)
A
2 READ VALUE OF HAND±HELD TESTER(INTAKE MANIFOLD ABSOLUTE PRESSURE)
(a) Connect the hand±held tester to the DLC3.
(b) Warm up the engine.
(c) Push the hand±held tester main switch ON.
(d) Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALL / MAPº and read its value displayed on
the hand±held tester with the shift lever is the ºNº position.
Standard :
ConditionIntake Manifold Absolute Pressure
Ignition switch ON (do not start engine)70 to 110 kPa (525 to 825 mmHg, 20.7 to 32.5 in.Hg)
Running without load (2,500 rpm)20 to 35 kPa (150 to 263 mmHg, 5.9 to 10.4 in.Hg)
NG Go to step 7
OK
3 READ VALUE OF HAND±HELD TESTER(STOP LIGHT SWITCH)
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand±held tester main switch \
ON.
(c) Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALL / STOP LIGHT SWº and read its value displayed on the hand±held tester.
Result :
Brake PedalSTP Signal
DepressedON
ReleasedOFF

A76903
PB (+)E2 (±)ECM Connector
E13
05±464
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
NGCHECK AND REPAIR STOP LIGHT SWITCH CIRCUIT
OK
4CHECK VACUUM HOSE(BRAKE BOOSTER PRESSURE SENSOR ± BRAKE BOOSTER, INTAKE MANIFOLD ± BRAKE BOOSTER)
(a)Check that the vacuum hoses are connected correctly.
(b)Check that the vacuum hoses are not loose or disconnected.
(c)Check the vacuum hoses and tubes for clogs, cracks, holes, damage, or bl\
ockage.
NGREPAIR OR REPLACE VACUUM HOSE
OK
5INSPECT ECM(PB VOLTAGE)
(a)Disconnect the vacuum hose from the brake booster pressure sensor.
(b)Turn the ignition switch ON.
(c)Using the MITYVAC (Hand±Held Vacuum Pump), apply a vacuum to the brake booster pressure sensor, measure
the voltage between the specified terminals of the E13
ECM connector.
Standard:
Symbols (Terminal No.)Vacuum pump operationSpecified condition
0 kPa
(0 mmHg, 0 in.Hg)3.3 to 3.9 V
PB (E13±26) ± E2 (E13±28)40 kPa
(300 mmHg, 11.8 in.Hg)2.1 to 2.7 V()
80 kPa
(600 mmHg, 23.6 in.Hg)0.9 to 1.5 V
NGGo to step 6
OK
CHECK FUNCTION OF BRAKE BOOSTER (See page 32±17, 32±21)

A81699PBE2
E13
ECM Connector
VC
123
A72877
PIM
E2
Brake Booster Pressure
Sensor Connector Wire Harness SideB2
VC
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±465
AVENSIS REPAIR MANUAL (RM1018E)
6 CHECK HARNESS AND CONNECTOR(ECM ± BRAKE BOOSTER PRESSURE
SENSOR)
(a) Disconnect the E13 ECM connector.
(b) Disconnect the B2 brake booster pressure sensor con-
nector.
(c) Check for continuity between the wire harness side con-
nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
VC (E13±18) ± VC (B2±3)
PB (E13±26) ± PIM (B2±2)Continuity
E2 (E13±28) ± E2 (B2±1)
y
Standard (Check for short):
Symbols (Terminal No.)Specified condition
VC (E13±18) or VC (B2±3) ± Body groundNo continuityPB (E13±26) or PIM (B2±2) ± Body groundNo continuity
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE BRAKE BOOSTER PRESSURE SENSOR
7 CHECK VACUUM HOSE(MANIFOLD ABSOLUTE PRESSURE SENSOR ± INTAKE
MANIFOLD)
(a) Check that the vacuum hose is connected correctly.
(b) Check that the vacuum hose is not loose or disconnected.
(c) Check the vacuum hose for clogs, cracks, holes, damage, or blockage.
NG REPAIR OR REPLACE VACUUM HOSE
OK

A81699PIME2
E13
ECM Connector
VC
123
A72877
VOUT
GND
Manifold Absolute Pressure
Sensor Connector Wire Harness SideV1
VCC
05±466
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
8 CHECK HARNESS AND CONNECTOR(ECM ± MANIFOLD ABSOLUTE PRESSURE
SENSOR)
(a) Disconnect the E13 ECM connector.
(b) Disconnect the V1 manifold absolute pressure sensor
connector.
(c) Check for continuity between the wire harness side con-
nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
VC (E13±18) ± VCC (V1±3)
PIM (E13±33) ± VOUT (V1±2)Continuity
E2 (E13±28) ± GND (V1±1)
y
Standard (Check for short):
Symbols (Terminal No.)Specified condition
VC (E13±18) or VCC (V1±3) ± Body groundNo continuityPIM (E13±33) or VOUT (V1±2) ± Body groundNo continuity
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR

A76868
B2
Brake Booster Pressure Sensor18
E13 ECM
5V
E1
3
R±W
26
Y
2
1
BR 28
E2PB
VC
PIM
E2 E13
E13
VC
R±W
Y
BR
9
EA1
11
10
EA1
EA1
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
05±459
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0555BRAKE BOOSTER PRESSURE SENSOR
CIRCUIT
DTCP0557BRAKE BOOSTER PRESSURE SENSOR CIRCUIT LOW INPUT
DTCP0558BRAKE BOOSTER PRESSURE SENSOR CIRCUIT HIGH INPUT
CIRCUIT DESCRIPTION
The brake booster pressure sensor detects internal pressure of the brake bo\
oster as voltage. A structure
of the sensor and its connection to the ECM are the same as ones for the i\
ntake air pressure sensor. (Refer
to DTC P0105 on page 05±342).
In order to purify emission gas when starting a cold engine, drastically\
retard the ignition timing to quickly
activate tha catalyst. Upon this, the throttle valve is opened larger than the throttle opening angle with\
a warm
engine, therefore the intake manifold pressure will be closer to atmospheric pr\
essure. If the negative pres-
sure (vacuum) applied inside the brake booster drops, the ECM cancels the drastic retarding timing and
introduces the negative pressure (vacuum) into the intake manifold, and the ECM \
then resumes the drastic
retarding timing after the brake booster negative pressure (vacuum) is ensured \
at required level.
DTC No.DTC Detection ConditionTrouble Area
P0555Open or short in brake booster pressure sensor circuit for 5
sec. or more

Open or short in brake booster pressure sensor circuit
P0557Open in brake booster pressure sensor circuit for 5 sec. or
more
Oen or short in brake booster ressure sensor circuit

Brake booster pressure sensor

Vacuum hose
P0558Short in brake booster pressure sensor circuit for 5 sec. or
more
ECM
WIRING DIAGRAM
05CKN±01

A76903
E2 (±)VC (+)
ECM Connector
E13
A76903
PB (+)E2 (±)
ECM Connector
E13
05±460
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
HINT:

If different DTCs related to different systems that have terminal E2 as the ground terminal are output
simultaneously, terminal E2 may be open.

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 deter\
mining whether the vehicle
was running or stopped, the engine was warmed up or not, the air±fuel ra\
tio was lean or rich, etc. at
the time of the malfunction.
1CHECK VACUUM HOSE(BRAKE BOOSTER PRESSURE SENSOR ± BRAKE BOOSTER, INTAKE MANIFOLD ± BRAKE BOOSTER)
(a)Check that the vacuum hoses are connected correctly.
(b)Check that the vacuum hoses are not loose or disconnected.
(c)Check the vacuum hoses and tubes for clogs, cracks, holes, damage, or bl\
ockage.
NGREPAIR OR REPLACE VACUUM HOSE
OK
2INSPECT ECM(VC 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
VC (E13±18) ± E2 (E13±28)4.5 to 5.5 V
NGCHECK AND REPLACE ECM (See page 01±32)
OK
3 INSPECT ECM(PB VOLTAGE)
(a) Measure the voltage between the specified terminals of the E13 ECM connector.
Standard:
Symbols (Terminal No.)ConditionSpecified condition
PB (E13±26) ±
E2 (E13 28)
Ignition switch ON
(do not start engine)
0.5 to 4.5 VE2 (E13±28)Idling
0.5 to 4.5 V
NG Go to step 4
OK
CHECK FOR INTERMITTENT PROBLEMS

A81699PBE2
E13
ECM Connector
VC
123
A72877
PIM
E2
Brake Booster Pressure
Sensor Connector Wire Harness SideB2
VC
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±461
AVENSIS REPAIR MANUAL (RM1018E)
4 CHECK HARNESS AND CONNECTOR(ECM ± BRAKE BOOSTER PRESSURE
SENSOR)
(a) Disconnect the E13 ECM connector.
(b) Disconnect the B2 brake booster pressure sensor con-
nector.
(c) Check for continuity between the wire harness side con-
nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
VC (E13±18) ± VC (B2±3)
PB (E13±26) ± PIM (B2±2)Continuity
E2 (E13±28) ± E2 (B2±1)
y
Standard (Check for short):
Symbols (Terminal No.)Specified condition
VC (E13±18) or VC (B2±3) ± Body groundNo continuityPB (E13±26) or PIM (B2±2) ± Body groundNo continuity
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE BRAKE BOOSTER PRESSURE SENSOR

± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±455
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0504 BRAKE SWITCH ºAº/ºBº CORRELATION
CIRCUIT DESCRIPTION
In this system, the signal of the stop light switch is used to judge whether the acceleration system is abnormal
or not.
The stop light switch has a duplex system (signals STP and ST1±) to memorize the abnormality when the
signals of depressing and releasing the brake pedal are detected simultaneously.
HINT:
Normal condition is as shown in the table.
SignalBrake pedal releasedIn transitionBrake pedal depressed
STPOFFONON
ST1±ONONOFF
DTC No.DTC Detection ConditionTrouble Area
P0504
Condition (a), (b) and (c) continue for 0.5 sec. or more:
(a) Ignition switch ON
(b) Brake pedal released
(c) STP signal is OFF when the ST1± signal is OFF
Short in stop light switch signal circuit

Stop light switch

ECM
05CJ5±01

A76867
Battery 4A
ALTS13
Stop Light
Switch G±W
19
E10
FL MAIN 1AM2
1
2 (LHD)4
IGN1
DM
STP
Driver
Side J/B
1
1
2
B±G 1A
B±GB±W4
3
IE3 Engine Room
J/B No. 4
Driver
Side J/B 4B 14D1 B±G 1
2
1
B±G
B±W To Stop Light
6
I13
Ignition SW
1IE4
(RHD)
1IP1
B±R B±R B±R
2 DH
18 DA Engine
Room
R/B No. 1
and
Engine
Room
J/B No. 1
AM2 IG2
STOP22 DA
1 DN 11
R±W
(LHD) R±W
(LHD)
IR1 2
R±W
(RHD) R±W
(RHD)
IR1 3
B±W
(RHD) B±W
(RHD)
IE1 20
B±W
(LHD)B±W
(LHD)
(LHD) J9 C
(RHD) J27 E
J/C
(LHD) J8 C
(RHD) J26 AECM
12
E10 ST1± 2
DA10
DCDriver
Side J/B
IE3 6
G±W
(LHD) G±W
(LHD)
IR1 1
G±W
(RHD) G±W
(RHD)
IR1 4
G±W
(RHD)G±W
(RHD)
IE2 14
G±W
(LHD) G±W
(LHD)G±W 05±456
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM
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 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.

A81707
Free Pushed in
43 21
A72880
Brake Pedal
DepressedBrake Pedal
Released
ST1± (+)
E11
E1 (±)
E10
ECM Connector
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±457
AVENSIS REPAIR MANUAL (RM1018E)
1 CHECK OPERATION OF STOP LIGHT
(a) Check if the stop lights go on and off normally when the brake pedal is depressed and released.
NG REPAIR OR REPLACE STOP LAMP SWITCH
CIRCUIT
OK
2 INSPECT STOP LIGHT SWITCH ASSY
(a) Check for continuity between each pair of the terminals.
Standard:
Switch positionTerminal No.Specified condition
Switchpin free1 ± 2ContinuitySwitch pin free3 ± 4No continuity
Switchpinpushed in1 ± 2No continuitySwitch pin pushed in3 ± 4Continuity
NG REPLACE STOP LIGHT SWITCH ASSY
OK
3 READ VALUE OF HAND±HELD TESTER(STP SIGNAL AND ST1± VOLTAGE)
(a) Turn the ignition switch ON.
(b) Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST
/ ALL / STOP LIGHT SWº and read its value displayed on
the hand±held tester.
Standard:
Brake PedalSpecified condition
DepressedSTP Signal ON
ReleasedSTP Signal OFF
(c) Measure the voltage between the specified terminals of
the E10 and E11 ECM connectors.
Standard:
Symbols (Terminal No.)Brake pedalSpecified condition
ST1± (E10±12) DepressedBelow 1.5 VST1 (E10 12)
± E1 (E11±1)
Released7.5 to 14 V
NG Go to step 4
OK
CHECK FOR INTERMITTENT PROBLEMS