TOYOTA AVENSIS 2005 Service Repair Manual

A66056
Engine Room R/B No. 1EFI MAIN Relay
A81091
E9
ECM Connector MREL
05±556
±
DIAGNOSTICS ECD SYSTEM(1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
4CHECK HARNESS AND CONNECTOR(VRV ± EFI MAIN RELAY)
(a)Check the harness and connector between the EFI main relay and ECM connector.
(1)Remove the EFI MAIN relay from the engine room
R/B No. 1.
(2)Disconnect the E9 ECM connector.
(3)Check for continuity between the wire harness side connectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
EFI main relay (1) ± MREL (E9±8)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
EFI main relay (1) or MREL (E9±8) ± Body groundNo continuity
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE ECM (See page 10±65)

± DIAGNOSTICSECD SYSTEM (1CD±FTV)
05±643
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0504 BRAKE SWITCH ºAº/ºBº CORRELATION
CIRCUIT DESCRIPTION
In this system, the signal of the stop lamp switch is used to judge whether the acceleration system is abnor-
mal or not.
The stop lamp 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
Conditions (a), (b) and (c) continue for 0.5 sec. or more
(1 trip detection logic):
(a) Ignition switch ON
(b) Brake pedal released
(c) STP signal is OFF when the ST1± signal is OFF

Short in stop lamp switch signal circuit

Stop lamp switch

ECM
05CPW±01

A81009
STP E10 G±W
6
4 B±RDriver
Side J/B
1
ED1 21
1
2 AM2
ALT B
2 IR1
B±L19
B
BatteryDriver
Side J/B Engine Room
R/B No. 3
FL MAIN 3
STOP 1
11A
3
3
W Engine Room
R/B No. 1
22 DA
1 DN 11 IE3
R±W
(LHD)R±W
(LHD)
R±W
(RHD)R±W
(RHD)
3 IR1
B±W
(RHD)B±W
(RHD)
20 IE1
B±W
(LHD)B±W
(LHD) 3 24 1
S13
Stop Lamp Switch
B±W B±W
C J9 (LHD)
E J27 (RHD)
J/C
C J8 (LHD)
A J26 (RHD) Driver
Side J/BIGN I13
Ignition Switch
AM2 IG2
B±R
B±R(LHD)
(RHD) 1 IE4
1IP1
18 DA2 DHECM
ST1± E1012 DA2
DC10
1 IR1 6 IE3
G±W
(LHD)G±W
(LHD)
G±W
(RHD)G±W
(RHD)
4 IR1
G±W
(RHD)G±W
(RHD)
14 IE2
G±W
(LHD)G±W
(LHD) 05±644
± DIAGNOSTICSECD SYSTEM (1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data using   
 . 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, etc. at the time of the malfunction.

A72924
FreePushed in
432
1
Stop Lamp Switch
A80995
Brake Pedal
Depressed Brake Pedal
Released
ST1± (+)
E1 (±)
ECM ConnectorE12
E10
±
DIAGNOSTICS ECD SYSTEM(1CD±FTV)
05±645
AVENSIS REPAIR MANUAL (RM1018E)
1CHECK OPERATION OF STOP LIGHT
(a)Check if the stop lights go on and off normally when the brake pedal is depressed and released.
NGREPAIR OR REPLACE STOP LAMP SWITCHCIRCUIT
OK
2INSPECT STOP LAMP SWITCH ASSY
(a)Check for continuity between each pair of the terminals. Standard:
Switch positionTerminals No.Specified condition
Switchpinfree1 ± 2ContinuitySwitch pin free3 ± 4No continuity
Switchpinpushedin1 ± 2No continuitySwitch pin pushed in3 ± 4Continuity
NGREPLACE STOP LAMP SWITCH ASSY
OK
3READ 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 ofthe E10 and E12 ECM connectors.
Standard:
Symbols (Terminal No.)Brake pedalSpecified condition
ST1± (E10±12) DepressedBelow 1.5 VST1 (E1012)
± E1 (E12±7)
Released7.5 to 14 V
OKCHECK FOR INTERMITTENT PROBLEMS (See page 05±528)
NG

A56986
Wire Harness SideStop Lamp Switch Connector S13
A81090
E10
ECM Connector
ST1±
STP
05±646
±
DIAGNOSTICS ECD SYSTEM(1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
4CHECK HARNESS AND CONNECTOR(STOP LAMP SWITCH ± ECM)
(a)Disconnect the S13 stop lamp 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 lamp switch (S13±1) ± STP (E10±19)ContinuityStop lamp switch (S13±4) ± ST1± (E10±12)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
Stop lamp switch (S13±1) or STP (E10±19) ± Body groundNocontinuityStop lamp switch (S13±4) or ST1± (E10±12) ± Body groundNo continuity
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE ECM(See page 10±65)

A79413
From
Speed SensorSkid
Control
ECU4±Pulse
Combination
Meter4±Pulse
ECM 05±640
± DIAGNOSTICSECD SYSTEM (1CD±FTV)
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
Conditions (a) and (b) continue for 7 sec. or more
(2 trip detection logic):
(a) THW less than 70C (158F)
(b) Engine speed is greater than 2,000 rpm but less than 3,500
rpm
Open or short in speed sensor circuit

Speed sensor

Combination meter

ECM

Skid control ECU
05B5L±03

A81008
ECM
E10 17
V±W
C11
Combination
Meter Assy
(RHD)
V±W
18
J20H
J/C
SP1
(RHD) J20
H
(LHD) J10
H
(LHD)J10
H
±
DIAGNOSTICS ECD SYSTEM(1CD±FTV)
05±641
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data using \b
 . 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, etc. at the time of the malfu\
nction.
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

A80462
SP1E2ECM Connector
E13
E10
A62954
Turn Wheel
4.5
to 5.5V
0V
05±642
±
DIAGNOSTICS ECD SYSTEM(1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
2INSPECT ECM(SP1 VOLTAGE)
(a)Shift the transmission 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
SP1 (E10±17) ± E2 (E13±28)Generated intermittently
HINT:
The output voltage should fluctuate ups and downs similarly to
the diagram on the left when the wheel is turned slowly.
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE ECM (See page 10±65)

A81482
Reduction GearIntake Shutter Control Motor
Intake Shutter Valve
Intake Shutter Valve
Fully Opened Switch Intake Shutter Internal Structure
ON
OFF
CLOSE
OPEN
± DIAGNOSTICSECD SYSTEM (1CD±FTV)
05±633
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0488 EXHAUST GAS RECIRCULATION
THROTTLE POSITION CONTROL
RANGE/PERFORMANCE
CIRCUIT DESCRIPTION
The ECM opens and closes the intake shutter valve using the step motor. Upon opening and closing the
valve, the exhaust gas recirculation volume is properly controlled. Also, the engine vibration and noise will
be reduced by closing the valve when the engine is stopped.
The ECM detects fully opened of the intake shutter valve with the intake shutter valve fully opened switch
DTC No.DTC Detection ConditionTrouble Area
P0488Intake shutter valve fully opened switch is not turned on, de-
spite forcing the intake shutter valve to fully open.

Open or short in intake shutter circuit

Open or short in fully opened switch circuit

Intake shutter

ECM
05CPV±01

A81510
Malfunction Detection
Actual Intake Shutter
Valve Opening Angle
ON
OFF Normal Abnormal
Fully Opened
Switch StatusOPEN CLOSE
Intake Shutter
Valve Control Motor
Step Counter
TimeAbnormal
Normal
OPEN CLOSE ECM Commanding Fully Open
05±634
± DIAGNOSTICSECD SYSTEM (1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
MONITOR DESCRIPTION
This DTC will be set if the actual opening angle of the intake shutter valve varies from the target opening
angle. The ECM forces the valve to fully open within 2 to 3 seconds as the ignition switch is turned ON, and
then checks if the intake shutter valve fully opened switch is turned on. In addition, the ECM also forces the
valve to fully open when accelerating the engine (high engine load) and checks if the switch is turned ON.
When starting and/or accelerating the engine, the ECM sets this DTC if the switch is not turned on.
If the DTC is present, the ECM enters fail±safe mode and limits the engine power. The fail±safe mode will
continue until the ignition switch is turned OFF.
MONITOR STRATEGY
Required sensorsIntake shutter valve fully opened switch
Frequency of operationContinuous
Duration3 sec.
CHK ENG operation1 driving cycle
TYPICAL ENABLING CONDITIONS
Specification
Start the engine and let it idle for 30 seconds and accelerate the vehicle speed to 60 km/h (37 mph) with the accelerator pedal opened more than
the half angle