2005 TOYOTA AVENSIS check engine light

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DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U241E(1AZ±FSE))05±925
AVENSIS REPAIR MANUAL (RM1018E)
7.ROAD TEST
NOTICE:
Conduct the test at normal operating ATF temperature 50 to 80
C (122 to 176
F).
(a)D range test Shift into the D range and fully depress the accelerator pedal and check\
the following points:
(1)Check up±shift operation.Check to see that 1
2, 2
3 and 3
O/D up±shift take place, and that the shift points conform
to the automatic shift schedule (See page 03±45).
HINT:

O/D Gear Up±shift Prohibition Control (1. Water temp. is 60
C (140
F) or less. 2. If there is a 10 km/h
(6 mph) difference between the set cruise control speed and vehicle speed.)

O/D Gear Lock±up Prohibition Control (1. Brake pedal is depressed. 2. Water temp. is 60
C (140
F)
or lower)
(2)Check for shift shock and slip. Check for shock and slip at the 1
2, 2
3 and 3
O/D up±shift.
(3)Check for abnormal noise and vibration.
Run in D range lock±up or O/D gear and check for abnormal noise and v\
ibration.
HINT:
The check for the cause of abnormal noise and vibration must be done very t\
horoughly as it could also be
sure to loss of balance in the differential, torque converter, etc. (4)Check kick±down operation.While running in the D range, 2nd, 3rd and O/D gears, check to see that the p\
ossible kick±down
vehicle speed limits for 2
1, 3
2 and O/D
3 kick±downs conform to those indicated in the
automatic shift schedule (See page 03±45).
(5) Check for abnormal shock and slip at kick±down.
(6) Check the lock±up mechanism.

Drive in D range O/D gear, at a steady speed (lock±up ON) of about 60 km/h (37 mph).

Lightly depress the accelerator pedal and check that the engine speed does not change
abruptly.
If there is a big jump in engine speed, there is no lock±up.
(b) S range test Shift to the S range, depress the accelerator pedal and check the follow\
ing points:
Shift operations.

Shifting the shift lever to º+º or º±º changes the shift \
range on the combination meter.
HINT:
Manual shift prohibition control is performed when:

The ATF temperature is low.

Down±shifting causes engine overrun.

Down±shifting is required continuously. (Down±shifting to 1st gear may not be performed.)
(c) R range test Shift into the R range and fully depress the accelerator pedal and check\
for slipping.
CAUTION:
Before conducting this test, ensure that the test area is free from peop\
le and obstruction.
(d) P range test Stop the vehicle on a grade (more than 5
) and after shifting into the P range, release the parking
brake. Then, check to see that the parking lock pawl holds the vehicle in plac\
e.

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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

0567W±12
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DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U241E(1AZ±FSE))05±935
AVENSIS REPAIR MANUAL (RM1018E)
PROBLEM SYMPTOMS TABLE
HINT:
If a normal code is displayed during the DTC check but the trouble still o\
ccurs, check the circuits for each
symptom in the order given in the charts on the following pages and proceed to \
the page given for trouble-
shooting.
The Matrix Chart is divided into 3 chapters.

If the instruction ºProceed to next circuit inspection shown on matri\
x chartº is given in the flow chart
for each circuit, proceed to the circuit with the next highest number in the table to continue the check.

If the trouble still occurs even though there are no abnormalities in any of the other circuits, then ch\
eck
and replace the ECM.
CHAPTER 1: ELECTRONIC CIRCUIT MATRIX CHART
SymptomSuspect AreaSee page
No up±shift (A particular gear, from 1st to O/D gear, is not up±
shifted)ECM01±32
No down±shift (A particular gear, from O/D to 1st gear, is not
down±shifted)ECM01±32
No lock±up or No lock±up off
1. Stop light switch circuit
2. Engine coolant temp. sensor circuit
3. Throttle position sensor circuit
4. ECM05±947
05±309
05±309
01±32
Shift point too high or too lowECM01±32
No gear change by shifting into º+º or º±º while the shif\
t lever is in
the Sposition1. Transmission control switch circuit
2. ECM05±97201±32
Up±shift to O/D from 3rd while engine is cold
1. Engine coolant temp. sensor circuit
2. ATF temp. sensor circuit
3. ECM05±309
05±941
05±94301±32
Harsh engagement (N
D)ECM01±32
Harsh engagement (Lock±up)ECM01±32
Harsh engagement (Any driving range)ECM01±32
Poor accelerationECM01±32
Engine stalls when starting off or stoppingECM01±32
No kick±down1. Kick±down switch circuit
2. ECM05±970
01±32

05±1018±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U341E)
AVENSIS REPAIR MANUAL (RM1018E)
DTCP1520STOP LIGHT SWITCH CIRCUIT MALFUNCTION
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 Detection ConditionTrouble Area
P1520Stop light switch remains ON while vehicle running (1±trip
detection logic)
Short in stop lamp switch signal circuit

Stop lamp switch

ECM
WIRING DIAGRAM
See page 05±115.
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
CHECK AND REPLACE ECM
05C8K±01

0567W±10
05±1000±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U341E)
AVENSIS REPAIR MANUAL (RM1018E)
PROBLEM SYMPTOMS TABLE
HINT:
If a normal code is displayed during the DTC check but the trouble still o\
ccurs, check the circuits for each
symptom in the order given in the charts on the following pages and proceed to \
the page given for trouble-
shooting.
The Matrix Chart is divided into 3 chapters.

If the instruction ºProceed to next circuit inspection shown on matri\
x chartº is given in the flow chart
for each circuit, proceed to the circuit with the next highest number in the table to continue the check.

If the trouble still occurs even though there are no abnormalities in any of the other circuits, then ch\
eck
and replace the ECM.
CHAPTER 1: ELECTRONIC CIRCUIT MATRIX CHART
SymptomSuspect AreaSee page
No up±shift (A particular gear, from 1st to O/D gear, is not up±
shifted)ECM01±32
No down±shift (A particular gear, from O/D to 1st gear, is not
down±shifted)ECM01±32
No lock±up or No lock±up off
3. Stop light switch circuit
4. Engine coolant temp. sensor circuit
5. Throttle position sensor circuit
6. ECM05±1018
05±16
05±16
01±32
Shift point too high or too low
1. Engine coolant temp. sensor circuit
2. Throttle position sensor circuit
3. ECM05±16
05±16
01±32
No gear change by shifting into º+º or º±º while the shif\
t lever is in
the Sposition1. Transmission control switch circuit
2. ECM05±103501±32
Up±shift to O/D from 3rd while engine is cold
1. Engine coolant temp. sensor circuit
2. ATF temp. sensor circuit
3. ECM05±16
05±1003
05±1005 01±32
Harsh engagement (N
D)ECM01±32
Harsh engagement (Lock±up)ECM01±32
Harsh engagement (Any driving range)ECM01±32
Poor acceleration
1. Pattern select switch circuit (ECT SNOW switch)
2. Instrument panel J/B assy (Integration relay)
3. ECM05±1040
01±32
Engine stalls when starting off or stoppingECM01±32
No kick±down1. Kick±down switch circuit
2. ECM05±103301±32
No 2nd start
1. Pattern select switch circuit (ECT SNOW switch)
2. Transmission control switch circuit
3. Park/neutral position switch circuit
4. Instrument panel J/B assy (Integration relay)
5. ECM05±1040
05±1035
05±1024
05±104001±32

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
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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
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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.

050Y7±04
Inspector 's
Name:
Customer 's Name
Date Vehicle
Brought InLicence No.
Odometer Reading/ /
/ /
Date Problem First Occurred
Frequency Problem Occurs
ContinuousIntermittent ( times a day)
Steering operation is heavy.
Steering force to the right and left differs, or steering force is uneven.
PS Warning Light
AbnormalRemains ONDoes not come on
DTC Check1st Time
2nd TimeNormal Code
Malfunction Code (Code )
Normal CodeMalfunction Code (Code )
Symptomskm
miles
EMPS Check Sheet
While running, the steering force does not alter corresponding the vehicle
speed.
Vibration or strange sound comes from the steering column assy.
A malfunction code is outputed at the first time, record the freeze frame data as well (as the DTCs). Freeze Frame Data
When a trouble happens
(
During turningDuring vehicle stopAlways)
OthersCooled Warmed up
/ /Engine() Vehicle Model
The steering returns unwell.
Production Date VIN 05±1044
± DIAGNOSTICSELECTRONIC MOTOR POWER STEERING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
CUSTOMER PROBLEM ANALYSIS CHECK