turn signal TOYOTA AVENSIS 2005 Service Service Manual

D26539
E1
ECT SolenoidECM
11
DSL
E12 L±B
3 DSL G
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))05±897
AVENSIS REPAIR MANUAL (RM1018E)
DTC P2769/64 TORQUE CONVERTER CLUTCH SOLENOID
CIRCUIT LOW (SHIFT SOLENOID VALVE
DSL)
DTC P2770/64 TORQUE CONVERTER CLUTCH SOLENOID
CIRCUIT HIGH (SHIFT SOLENOID VALVE
DSL)
CIRCUIT DESCRIPTION
The shift solenoid valve DSL is turned ON and OFF by signals from the ECM in order to control the hydraulic
pressure operation the lock±up relay valve, which then the controls operation of the lock±up clutch.
DTC No.DTC Detection ConditionTrouble Area
P2769/64ECM detects short in solenoid valve DSL circuit 4 times when
solenoid valve DSL is operated (2 trip detection logic)
Short in shift solenoid valve DSL circuit

Shift solenoid valve DSL

ECM
P2770/64ECM detects open in solenoid valve DSL circuit 4 times when
solenoid valve DSL is not operated (2 trip detection logic)
Open in shift solenoid valve DSL circuit

Shift solenoid valve DSL

ECM
Fail safe function:
If the ECM detects a malfunction, it turns the shift solenoid valve DSL OFF.
WIRING DIAGRAM
05C8Y±01

D26539
E1
ECT SolenoidECM
11
DSL E12 L±B
3 DSL G
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FSE))05±951
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0743 TORQUE CONVERTER CLUTCH CIRCUIT
ELECTRICAL (SHIFT SOLENOID VALVE
DSL)
CIRCUIT DESCRIPTION
The shift solenoid valve DSL is turned ON and OFF by signals from the ECM in order to control the hydraulic
pressure operation the lock±up relay valve, which then the controls operation of the lock±up clutch.
DTC No.DTC Detection ConditionTrouble Area
P0743
Either (a) or (b) is detected at 1 time:
(2 trip detection logic)
(a) Solenoid resistance is 8  or less short circuit when sole-
noid is energized
(b) Solenoid resistance is 100 k or more open circuit when
solenoid is not energized

Open or short in shift solenoid valve DSL circuit

Shift solenoid valve DSL

ECM
Fail safe function:
If the ECM detects a malfunction, it turns the shift solenoid valve DSL OFF.
WIRING DIAGRAM
05C9C±01

±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U241E(1AZ±FSE))05±947
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0724BRAKE SWITCH ºBº CIRCUIT HIGH
CIRCUIT DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling while dr\
iving in lock±up condition, when
brakes are suddenly applied.
When the brake pedal is depressed, this switch sends signals to the ECM. Then\
the ECM cancels the opera-
tion of the lock±up clutch while braking is in progress.
DTC No.DTC Detecting ConditionTrouble Area
P0724The stop light switch does not turn off even once the vehicle is
driven (2±trip detection logic).
Short in stop light switch signal circuit

Stop light switch

ECM
WIRING DIAGRAM
See page 05±475.
INSPECTION PROCEDURE
1 INSPECT STOP LAMP SWITCH ASSY
NG REPLACE STOP LAMP SWITCH ASSY
OK
2 CHECK HARNESS AND CONNECTOR(STOP LAMP SWITCH ASSY ± ECM)
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPAIR OR REPLACE ECM
05C9A±01

G25416
ECM
KD
E10 K2
Kick Down SW
IP66
CA
1
2 CJ
IG24
W±BCenter J/B
30
8
IG2
W±B
W W W±B
05±970± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FSE))
AVENSIS REPAIR MANUAL (RM1018E)
KICK DOWN SWITCH CIRCUIT
CIRCUIT DESCRIPTION
The kick±down switch is turned ON when the accelerator pedal is depressed to the full throttle and sends
signals to ECM.
When the kick±down switch is turned ON, the ECM controls gear shifting according to the programmed shift
diagrams.
If a short circuit develops in the kick±down switch, the ECM disregards the kick±down signals and controls
shifting at the normal shift points.
WIRING DIAGRAM
05C9J±01

D26539
E1
ECT Solenoid
R
E12SLECM
13
LG
4
SL
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)05±1015
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0773 SHIFT SOLENOID ºEº ELECTRICAL (SHIFT
SOLENOID VALVE SL)
CIRCUIT DESCRIPTION
The shift solenoid valve SL is turned ON and OFF by signals from the ECM to control the hydraulic pressure
acting on the lock±up relay valve, which then controls operation of the lock±up clutch.
Fail safe function:
If the ECM detects a malfunction, it turns the shift solenoid valve SL OFF.
DTC No.DTC Detecting ConditionTrouble Area
P0773
Either (a) or (b) is detected for 1 time.
(2±trip detection logic)
(a) Solenoid resistance is 8  or less when solenoid is ener-
gized.
(b) Solenoid resistance is 100 k or more when solenoid is not
energized.

Open or short in shift solenoid valve SL circuit

Shift solenoid valve SL

ECM
WIRING DIAGRAM
05687±06

C52361
DLC3:CGTs
Tc
F42646
Malfunction Code (Example Code 73)
7 3
ON
OFF
0.5 sec.
0.5 sec.
0.5 sec. 4 sec.
Repeat
0.5 sec.
ON
OFF
0.25 sec.
0.25 sec.
Normal Code
A Cycle 1.5 sec.
05±1048
±
DIAGNOSTICS ELECTRONIC MOTOR POWER STEERING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
5.INPUT SIGNAL CHECK (TEST MODE) (USING SST CHECK WIRE)
(a)Check the input signal using a SST check wire.
(1)Using SST, connect terminals Ts and CG of DLC3.
SST09843±18040
(2)Turn the ignition switch to ON.
(3)Check that the PS warning light shows the normalcode.
(4)Check that the PS warning light goes off while driv- ing the vehicle more than 10 km/h (6 mph) and the
engine speed more than 300 rpm.
HINT:
If the PS warning light goes off during driving, the sensor is
judged to be normal.
(5)Stop the vehicle.
(6)Using SST, connect terminals Tc and CG of DLC3.
SST09843±18040
(7)Read the number of blinks of the PS warning light.
HINT:

See the list of DTC shown in the table below.

Even if a sensor is normal, it output codes 71 and 73 dur-
ing test mode.
DTC of input signal check function:
Code No.
(See page)DiagnosisTrouble Area
C1571/71
(05±1067)Speed sensor signal check 1 (Test mode)

Speed sensor

Speed sensor circuit

Skid control ECU assy

Combination meter assy

Power steering ECU assy
C1573/73
(05±1070)Engine revolution signal check (Test mode)

Engine revolution signal circuit

ECM

Power steering ECU assy
(8) After checking, disconnect the SST from the termi-
nal Ts and CG, Tc and CG of DLC3, and turn the
ignition switch to OFF.
SST 09843±18040

C52361
DLC3:CGTs
Tc
±
DIAGNOSTICS ELECTRONIC MOTOR POWER STEERING SYSTEM
05±1049
AVENSIS REPAIR MANUAL (RM1018E)
6.INPUT SIGNAL CHECK (TEST MODE)
(USING HAND±HELD TESTER)
(a)Check the input signal using the hand±held tester.
(1)Connect the hand±held tester to the DLC3.
(2)Check that the warning light goes off with driving thevehicle more than 10 km/h (6 mph) and engine
speed more than 300 rpm.
(3)Read the DTC by following the prompts on the tes- ter screen.
HINT:

Refer to the hand±held tester operator's manual for fur-
ther details.

See the list of DTC shown in the table below.

Even if a sensor is normal, it outputs codes C1571/71 and
C1573/73 during test mode.
DTC of input signal check function:
Code No.
(See page)DiagnosisTrouble Area
C1571/71
(05±1067)Speed sensor signal check 1 (Test mode)

Speed sensor

Speed sensor circuit

Skid control ECU assy

Combination meter assy

Power steering ECU assy
C1573/73
(05±1070)Engine revolution signal check (Test mode)

Engine revolution signal circuit

ECM

Power steering ECU assy
7. CALIBRATION OF TORQUE SENSOR ZERO POINT
(USING SST CHECK WIRE)
HINT:
Perform this operation in the following cases.

When removing and installing ºsteering wheel assemblyº,
ºtilt steering column assemblyº and ºsteering gear assem-
blyº.

When replacing power steering ECU assy.
(a) Place front wheels and steering wheel facing straight ahead.
(b) Perform the torque sensor zero point initialization.
HINT:
If the power steering ECU assy is replaced, initialization is not
necessary. (1) Stop the vehicle and turn the ignition switch OFF.
(2) Using SST, connect terminals Ts and CG of DLC3.
SST 09843±18040
(3) Using SST, connect terminals Tc and CG of DLC3.
SST 09843±18040
(4) Turn the ignition switch ON.

G25416
ECM
KD *
112
E10 K2
Kick Down SW
IP6
CA
12 CJ
W±BCenter J/B
6
IG1 IG112
W WW±B W±B
*1: LHD
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)05±1033
AVENSIS REPAIR MANUAL (RM1018E)
KICK DOWN SWITCH CIRCUIT
CIRCUIT DESCRIPTION
The kick±down switch is turned ON when the accelerator pedal is depressed to the full throttle and sends
signals to ECM.
When the kick±down switch is turned ON, the ECM controls gear shifting according to the programmed shift
diagrams.
If a short circuit develops in the kick±down switch, the ECM disregards the kick±down signals and controls
shifting at the normal shift points.
WIRING DIAGRAM
05C8O±01

F44304
PGNDE14TACH
E15


A05138
5 V/
Division
10 ms / Division
05±1072
±
DIAGNOSTICS ELECTRONIC MOTOR POWER STEERING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
3INSPECT POWER STEERING ECU ASSY(ENGINE REVOLUTION SIGNAL)
(a)Turn the ignition switch ON.
(b)Connect an oscilloscope to terminals TACH and PGND of the power steering ECU assy connector.
(c)With the engine idling, check the signal waveform. Standard:
Signal waveform as shown in the illustration.
HINT:
As the engine revolution becomes high, the waveform cycle
narrows.
OKREPLACE POWER STEERING ECU ASSY(See page 50±20)
NG
4 CHECK HARNESS AND CONNECTOR(POWER STEERING ECU ASSY ± ECM)
(a) Check for an open or short circuit in harness and connector between powe\
r steering ECU assy and ECM (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
GO TO ENGINE CONTROL SYSTEM

F44304
PGNDE14SPD
E15


A05135
5 V/
Division
20 ms/Division
±
DIAGNOSTICS ELECTRONIC MOTOR POWER STEERING SYSTEM
05±1069
AVENSIS REPAIR MANUAL (RM1018E)
3INSPECT POWER STEERING ECU ASSY(METER SPEED SIGNAL)
(a)Turn the ignition switch ON.
(b)Connect an oscilloscope to terminals SPD and PGND of
the power steering ECU assy connector.
(c)Driving at about 20 km/h (12 mph), check the signal wave- form.
Standard:
Signal waveform as shown in the illustration.
HINT:
As the vehicle speed becomes high, the waveform cycle nar-
rows.
OKREPLACE POWER STEERING ECU ASSY(See page 50±20)
NG
4 CHECK HARNESS AND CONNECTOR(POWER STEERING ECU ASSY ± COMBINATION METER ASSY)
(a) Check for an open or short circuit in harness and connector between powe\
r steering ECU assy and
combination meter assy (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
GO TO COMBINATION METER SYSTEM(See page 05±1510)