TOYOTA AVENSIS 2005 Service Repair Manual

±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U241E(1AZ±FE))05±869
AVENSIS REPAIR MANUAL (RM1018E)
5.ACTIVE TEST
HINT:
Performing the ACTIVE TEST using the hand±held tester allows the relay, VSV, actuator and so on to oper-
ate without parts removal. Performing the ACTIVE TEST as the first step of troubleshooting is one of the
method to shorten the labor time.
It is possible to display the DATA LIST during the ACTIVE TEST.
(a)Warm up the engine.
(b)Turn the ignition switch OFF.
(c)Connect the hand±held tester to the DLC3.
(d)Turn the ignition switch ON.
(e)According to the display on tester, perform the ºACTIVE TESTº.
ItemTest DetailsDiagnostic Note
LINE PRESS UP
[Test Details]
Operate the shift solenoid SLT and raise the line pressure.
[Vehicle Condition]

Vehicle Stopped.

IDL: ON
[Others]
ON: Line pressure up.
OFF: No action (normal operation)
±
LOCK UP
[Test Details]
Control the shift solenoid DSL to set the ATM to the lock±up condition.
[Vehicle Condition]
Vehicle Speed: 60 km/h (37 mph) or more
Possible to check the DSL opera-
tion.
SHIFT
[Test Details]
Operate the shift solenoid valve and set the each shift range by your-
self.
[Vehicle Condition]
Less than 50 km/h (31 mph)
[Others]

Press
button: Shift up

Press  button: Shift down
Possible to check the operation of
the shift solenoid values.
6.PROBLEM SYMPTOM CONFIRMATION
(a)Taking into consideration the results of the customer problem analysis, try to\
reproduce the symptoms of the trouble. If the problem is that the transaxle does not shift up, sh\
ift down, or the shift point is too
high or too low, conduct the following road test referring to the automatic shift sched\
ule and simulate
the problem symptoms.
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)

05±870±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U241E(1AZ±FE))
AVENSIS REPAIR MANUAL (RM1018E)
(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:

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.

D25148
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9 1 0111 21 3 1 514 16
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))05±871
AVENSIS REPAIR MANUAL (RM1018E)
8. MECHANICAL SYSTEM TESTS
(a) Measure the stall speed.
The object of this test is to check the overall performance of the transaxle and engine by measuring
the stall speeds in the D and R ranges.
NOTICE:

Do the test at normal operating ATF temperature 50 to 80
C (122 to 176
F).

Do not continuously run this test for longer than 5 seconds.

To ensure safety, do this test in a wide, clear level area which provides good traction.

The stall test should always be carried out in pairs. One technician should observe the condi-
tions of wheels or wheel stoppers outside the vehicle while the other is doing the test.
(1) Chock the 4 wheels.
(2) Connect the hand±held tester to DLC3 or tachome-
ter to terminal TAC of DLC3 with SST.
SST 09843±18030
(3) Fully apply the parking brake.
(4) Keep your left foot pressing firmly on the brake ped-
al.
(5) Start the engine.
(6) Shift into the D range. Press all the way down on the
accelerator pedal with your right foot.
(7) Quickly read the stall speed at this time.
Stall speed: 2,550
150 rpm
(8) Do the same test in the R range.
Stall speed: 2,550
150 rpm
Evaluation:
ProblemPossible cause
(a) Stall speed low in D and R ranges

Engine output may be insufficient

Stator one±way clutch not operating properly
HINT: If more than 600 rpm below the specified value, the torque
converter could be faulty.
(b) Stall speed high in D range

Line pressure too low

Forward clutch slipping

No. 2 one±way clutch not operating properly

U/D clutch slipping
(c) Stall speed high in R range

Line pressure too low

Direct clutch slipping

1st & reverse brake slipping

U/D clutch slipping
(d) Stall speed high in D and R ranges

Line pressure too low

Improper fluid level

U/D one±way clutch not operating properly

D25148
TA C
12345 768
9 1 0111 21 3 1 514 16 05±872
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))
AVENSIS REPAIR MANUAL (RM1018E)
(b) Measure the time lag.
(1) When the shift lever is shifted while the engine is idling, there will be a certain time lapse or lag
before the shock can be felt. This is used for checking the condition of the direct clutch, forward
clutch, and 1st and reverse brake.
NOTICE:

Do the test at normal operating ATF temperature 50 to 80
C (122 to 176
F).

Be sure to allow 1 minute interval between tests.

Take 3 measurements and take the average value.
(2) Chock the 4 wheels.
(3) Connect the hand±held tester to DLC3 or tachome-
ter to terminal TAC of DLC3 with SST.
SST 09843±18030
(4) Start engine and check idle speed.
Idle speed: 650  50 rpm (In N range and A/C OFF)
(5) Shift the lever from N to D range. Using a stop
watch, measure the time from when the lever is
shifted until the shock is felt.
Time lag: N
D less than 1.2 seconds
(6) In the same way, measure the time lag for N
R.
Time lag: N
R less than 1.5 seconds
Evaluation (If N
D or N
R time lag is longer than the specified):
ProblemPossible cause
N
D time lag is longer

Line pressure too low

Forward clutch worn

U/D one±way clutch not operating properly
N
R time lag is longer

Line pressure too low

Direct clutch worn

1st and reverse brake worn

U/D one±way clutch not operating properly










D25472
SST
SST
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))05±873
AVENSIS REPAIR MANUAL (RM1018E)
9. HYDRAULIC TEST
(a) Measure the line pressure.
NOTICE:

Do the test at normal operation ATF temperature 50 to 80
C (122 to 176
F).

The line pressure test should always be carried out in pairs. One technician should observe
the conditions of wheels or wheel stopper outside the vehicle while the other is doing the test.

Be careful to prevent SST's hose from interfering with the exhaust pipe.
(1) Warm up the ATF.
(2) Remove the test plug on the rear side of the trans-
axle case and connect SST.
SST 09992±00095 (09992± 00231, 09992±00271)
(3) Fully apply the parking brake and chock the 4
wheels.
(4) Connect the hand±held tester to DLC3.
(5) Start the engine and check idling speed.
(6) Keep your left foot pressing firmly on the brake ped-
al and shift into D range.
(7) Measure the line pressure when the engine is idling.
(8) Depress the accelerator pedal all the way down.
Quickly read the highest line pressure when engine
speed reaches stall speed.
(9) In the same way, do the test in R range.
Specified line pressure:
ConditionD range kPa (kgf / cm2, psi)R range kPa (kgf / cm2, psi)
Idling372 to 412 (3.8 to 4.2, 54 to 60)672 to 742 (6.9 to 7.6, 98 to 108)
Stall931 to 1,031 (9.5 to 10.5, 135 to 150)1,768 to 1,968 (18.0 to 20.1, 256 to 285)
Evaluation:
ProblemPossible cause
If the measured values at all ranges are higher
Line pressure control solenoid (SLT) defective

Regulator valve detective
If the measured values at all ranges are lower

Line pressure control solenoid (SLT) defective

Regulator valve detective

Oil pump defective
If pressure is low in the D range only
D range circuit fluid leak

Forward clutch defective
If pressure is low in the R range only

R range circuit fluid leak

Direct clutch defective

1st & reverse brake defective

D09299
05±874± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))
AVENSIS REPAIR MANUAL (RM1018E)
10. MANUAL SHIFTING TEST
HINT:
By this test, it can be determined whether the trouble is within
the electrical circuit or is a mechanical problem in the transaxle.
(a) Disconnect the solenoid wire.
(b) Inspect the manual driving operation.
Check that the shift and gear ranges correspond to the
table below.
While driving, shift through the D range.
Check that the gear change corresponds to the shift
range.
Shift rangeGear position
D3rd
RReverse
PPawl Lock
HINT:
If the gear positions of the D are difficult to distinguish, do the
above road test.
If any abnormality is found in the above test, the problem is in
the transaxle itself.
(c) Connect the solenoid wire.
(d) Cancel out the DTC.

G23367
Tester menu flow:
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))05±875
AVENSIS REPAIR MANUAL (RM1018E)
11. RESET MEMORY
CAUTION:
Perform the RESET MEMORY (AT initialization) when replacing the automatic transaxle assy, engine
assy or ECM.
NOTICE:
Hand±held tester only
(a) Turn the ignition switch to OFF.
(b) Connect the hand±held tester to the DLC3.
(c) Turn the ignition switch to ON.
(d) Perform the reset memory procedure from the ENGINE menu.
CAUTION:
After performing the RESET MEMORY, be sure to perform the ROAD TEST described earlier.

0567O±10
Transmission Control
System Check SheetInspector 's
Name:
Customer 's Name
Registration No.
Registration Year
Frame No.
Date Vehicle
Brought InOdometer Readingkm
mile / /
/ /
Date Problem
Occurred
How Often Does
Problem Occur?/ /

Continuous
Intermittent ( times a day)
Symptoms

Vehicle does not move (
Any range
Particular range)

No up±shift (
1st
2nd
2nd
3rd
3rd
O/D )

No down±shift (
O/D
3rd
3rd
2nd
2nd
1st )

Lock±up malfunction

Shift point too high or too low

Harsh engagement (
N
D
Lock±up
Any drive range)

Slip or shudder

No kick±down

Others
DTC Check1st Time
2nd Time Check Item
Normal codeMalfunction code (DTC )
Normal codeMalfunction code (DTC )
MILNormal
Remains ON

No up±shift (S range)

No down±shift (S range) 05±862
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))
AVENSIS REPAIR MANUAL (RM1018E)
CUSTOMER PROBLEM ANALYSIS CHECK

05CBX±01
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))05±861
AVENSIS REPAIR MANUAL (RM1018E)
PRECAUTION
CAUTION:
Perform the RESET MEMORY (AT initialization) when replacing the automatic transaxle assy, engine
assy or ECM.
HINT:
Initialization can not be completed by only removing the battery.

0567N±11
05±856±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U241E(1AZ±FE))
AVENSIS REPAIR MANUAL (RM1018E)
ELECTRONIC CONTROLLED AUTOMATIC TRANSAXLE
[ECT](U241E(1AZ±FE))
HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
The ECM of this system is connected to the multiplex communication system. \
Therefore, before starting trou-
bleshooting, make sure to check that there is no trouble in the multiplex communicat\
ion system.
When using hand±held tester, troubleshoot in accordance with the procedure
on the following pages.
1Vehicle Brought to Workshop
2Customer Problem Analysis (See page 05±862)
3 Connect the hand±held tester to DLC3
4Check and Clear DTC and Freeze Frame Data (See page 05±863)
5 Visual Inspection
6Setting the Check Mode Diagnosis (See page 05±863)
7 Problem Symptom Confirmation
Symptom does not occur: Go to step 8
Symptom occur: Go to step 9
8Symptom Simulation (See page 01±22)