Page 5001 of 5135
05KAQ–02
G24063
SST
SST
– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)05–223
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
HYDRAULIC TEST
1. PERFORM HYDRAULIC TEST
(a) Measure the line pressure.
NOTICE:
Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature 50
to 80C (122 to 176F).
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.
This check must be conducted after checking and adjusting engine.
Perform under condition that A/C is OFF.
When conducting stall test, do not continue more than 10 seconds.
(1) Warm up the ATF.
(2) Remove the test plug on the left 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 an Intelligent Tester II to the 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 position.
(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 position.
Specified line pressure:
ConditionD position kPa (kgf / cm2, psi)R position kPa (kgf / cm2, psi)
Idling372 to 412 kPa
(3.8 to 4.2 kgf/cm2, 54 to 60 psi)
553 to 623 kPa
(5.6 to 6.4 kgf/cm2, 80 to 90 psi)
Stall test1,126 to 1,226 kPa
(11.5 to 12.5 kgf/cm2, 163 to 178 psi)
1,664 to 1,864 kPa
(17.0 to 19.0 kgf/cm2, 241 to 270 psi)
Evaluation:
ProblemPossible cause
If the measured values at all positions are higherShift solenoid valve SLT defective
Regulator valve detective
If the measured values at all positions are lower
Shift solenoid valve SLT defective
Regulator valve detective
Oil pump defective
If pressure is low in the D position onlyD position circuit fluid leak
Forward clutch defective
If pressure is low in the R position only
R position circuit fluid leak
Reverse clutch defective
1st and reverse brake defective
Page 5002 of 5135
05KAP–02
– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)05–221
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
MECHANICAL SYSTEM TESTS
1. PERFORM 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 positions.
NOTICE:
Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature 50
to 80C (122 to 176F).
Do not continuously run this test for longer than 10 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 an Intelligent Tester II to the DLC3.
(3) Fully apply the parking brake.
(4) Keep your left foot pressed firmly on the brake pedal.
(5) Start the engine.
(6) Shift into the D position. Press all the way down on the accelerator pedal with your right foot.
(7) Quickly read the stall speed at this time.
Stall speed: 2,400 150 rpm
(8) Do the same test in the R position.
Stall speed: 2,400 150 rpm
Evaluation:
ProblemPossible cause
(a) Stall engine speed is low in D and R positions
Engine power output may be insufficient
Stator one–way clutch not operating properly
HINT: If the value is less than the specified value by 600 rpm or
more, the torque converter could be faulty.
(b) Stall engine speed is high in D position
Line pressure is too low
Forward clutch slipping
One–way clutch No.2 not operating properly
(c) Stall engine speed is high in R position
Line pressure is too low
Reverse clutch slipping
1st and reverse brake slipping
(d) Stall engine speed is high in D and R positionsLine pressure is too low
Improper fluid level
Page 5003 of 5135
05–222– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
(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:
Perform the test at the normal operating ATF temperature 50 to 80 C (122 to 176 F).
Be sure to allow 1 minute interval between tests.
Perform the test three times, and measure the time lags. Calculate the average value of the three
time lags.
(2) Connect an Intelligent Tester II to the DLC3.
(3) Fully apply the parking brake.
(4) Start and warm up the engine and check idle speed.
Idle speed: approx. 700 rpm (In N position and A/C OFF)
(5) Shift the lever from N to D position. 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 is too low
Forward clutch worn
One–way clutch No.2 not operating properly
N → R time lag is longer
Line pressure is too low
Reverse clutch worn
1st and reverse brake worn
Page 5004 of 5135
056IH–10
–
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)05–215
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
The intelligent tester II can be used at steps 3, 4, 6, and 9.
1 Vehicle Brought to Workshop
2 Customer Problem Analysis ( SEE PAGE 05–218 )
3 Connect the intelligent tester II to DLC3
4 Check and Clear DTC and Freeze Frame Data ( SEE PAGE 05–239 )
5 Visual Inspection
6 Setting the Check Mode Diagnosis ( SEE PAGE 05–240 )
7 Problem Symptom Confirmation ( SEE PAGE 05–219 )
Symptom does not occur: Go to step 8
Symptom occur: Go to step 9
8 Symptom Simulation ( SEE PAGE 01–22 )
9 DTC Check ( SEE PAGE 05–239 )
DTC is not output: Go to step 10
DTC is output: Go to step 17
Page 5005 of 5135
05–216–
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
10 Basic Inspection (See Pub. No. RM1018E, page 40–2, 40–8 and 40–69)\
NG Go to step 19
OK
1 1 Mechanical System Test ( SEE PAGE 05–221 )
NG Go to step 16
OK
12 Hydraulic Test ( SEE PAGE 05–223 )
NG Go to step 16
OK
13 Manual Shifting Test ( SEE PAGE 05–224 )
NG Go to step 15
OK
14 Problem Symptoms Table Chapter 1 ( SEE PAGE 05–229 )
NG Go to step 18
OK
15 Problem Symptoms Table Chapter 2 ( SEE PAGE 05–229 )
16 Part Inspection
Go to step 19
17 DTC Chart ( SEE PAGE 05–245 )
18 Circuit Inspection
Page 5006 of 5135
– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)05–217
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
19 Repair or Replace
20 Confirmation Test
End
Page 5007 of 5135
05KAM–02
NE
THW
VTA1, 2
VC
SPD
STP
THONTS1
S2
SLT
SB
SL
W
SIL
TC ECMCrankshaft Position Sensor
Engine Coolant
Temperature Sensor
Throttle Position Sensor
Park/Neutral Position Switch
Speed Sensor
Skid Control ECU
Combination Meter
Input Turbine Speed Sensor
(Speed Sensor NT)
Stop Lamp Switch Assy
ATF (Automatic Transmission
Fluid) Temperature SensorShift Solenoid Valve S1
Shift Solenoid Valve S2
Shift Solenoid Valve SLT
MIL
(Malfunction Indicator Lamp)
DLC3
(Data Link Connector 3) Shift Solenoid Valve SB
Shift Solenoid Valve SL NSW
P, R, N, D
SFTU
SFTD Transmission Control Switch
(Transmission Floor Shift Assy)SPT
Kick Down SwitchKD
*1
*1: LHD
ST
Shift Solenoid Valve ST
– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)05–213
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
SYSTEM DIAGRAM
The configuration of the electronic control system in the U341E automatic transaxles is as shown in the fol-
lowing chart.
Page 5008 of 5135
05KAK–01
– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)05–209
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
PART AND SYSTEM NAME LIST
This reference list indicates the part names used in this manual along with their definitions.
Part and system nameDefinition
Toyota HCAC system, Hydrocarbon adsorptive Catalyst
(HCAC) system, HC adsorptive three–way catalystHC adsorptive three–way catalytic converter
Variable Valve Timing sensor, VVT sensorCamshaft position sensor
Variable valve timing system, VVT systemCamshaft timing control system
Camshaft timing oil control valve, Oil control valve OCV,
VVT, VSVCamshaft timing oil control valve
Variable timing and lift, VVTLCamshaft timing and lift control
Crankshaft position sensor ”A”Crankshaft position sensor
Engine speed sensorCrankshaft position sensor
THAIntake air temperature
Knock control moduleEngine knock control module
Knock sensorEngine knock sensor
Mass or volume air flow circuitMass air flow sensor circuit
Vacuum sensorManifold air pressure sensor
Internal control module, Control module, Engine control
ECU, PCMPower train control module
FC idleDeceleration fuel cut
Idle air control valveIdle speed control
VSV for CCV, Canister close valve VSV for canister controlEvaporative emissions canister vent valve
VSV for EVAP, Vacuum switching valve assembly No. 1,
EVAP VAV, Purge VSVEvaporative emissions canister purge valve
VSV for pressure switching valve, Bypass VSVEvaporative emission pressure switching valve
Vapor pressure sensor, EVAP pressure sensor, Evaporative
emission control system pressure sensorFuel tank pressure sensor
Charcoal canisterEvaporative emissions canister
ORVR systemOn–boad refueling vapor recovery system
Intake manifold runner controlIntake manifold tuning system
Intake manifold runner valve, IMRV, IACV (runner valve)Intake manifold tuning valve
Intake control VSVIntake manifold tuning solenoid valve
AFSAir fuel ratio sensor
O2 sensorHeater oxygen sensor
Oxygen sensor pumping current circuitOxygen sensor output signal
Oxygen sensor reference ground circuitOxygen sensor signal ground
Accel position sensorAccelerator pedal position sensor
Throttle actuator control motor, Actuator control motor, Elec-
tronic throttle motor, Throttle control motorElectronic throttle actuator
Electronic throttle control system, Throttle actuator control
systemElectronic throttle control system
Throttle/pedal position sensor, Throttle/pedal position switch,
Throttle position sensor/switchThrottle position sensor
Turbo press sensorTurbocharger pressure sensor
Turbo VSVTurbocharger pressure control solenoid valve
P/S pressure switchPower–steering pressure switch
VSV for ACMActive control engine mount
Speed sensor, Vehicle speed sensor ”A”, Speed sensor for
skid control ECUVehicle speed sensor
ATF temperature sensor, Trans. fluid temp. sensor, ATF
temperature sensor ”A”Transmission fluid temperature sensor
Electronic controlled automatic transmission, ECTElectronically controlled automatic
Intermediate shaft speed sensor ”A”Couter gear speed sensor