2005 TOYOTA AVENSIS clutch

05−582− DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U151E)
AVENSIS Supplement (RM1045E)
DTC P0741TORQUE CONVERTER CLUTCH SOLENOID
PERFORMANCE (SHIFT SOLENOID VALVE
DSL)
SYSTEM DESCRIPTION
The ECM uses the signals from the throttle position sensor, Air−flow meter, turbine (input) speed sensor,
intermediate (counter) shaft speed sensor and crankshaft position sensor to monitor the engagement condi-
tion of the lock−up clutch.
Then the ECM compares the engagement condition of the lock−up clutch with the lock−up schedule in the
ECM memory to detect a mechanical problems of the shift solenoid valve DSL, valve body and torque con-
verter clutch.
DTC No.DTC Detection ConditionTrouble Area
P0741
Lock−up does not occur when driving in lock−up range (normal
driving at 80 km/h[50 mph]), or lock−up remains ON in lock−
up OFF range (2−trip detection logic)
SShift solenoid valve DSL remains open or closed
SValve body is blocked
SShift solenoid valve DSL
STorque converter clutch
SAutomatic transaxle (clutch, brake or gear etc.)
SLine pressure is too low
SECM
MONITOR DESCRIPTION
Torque converter lock−up is controlled by the ECM based on speed sensor (NT), speed sensor (NC), engine
rpm, engine load, engine temperature, vehicle speed, transmission temperature, and gear selection. The
ECM determines the lock−up status of the torque converter by comparing the engine rpm (NE) to the input
turbine rpm (NT). The ECM calculates the actual transmission gear by comparing input turbine rpm (NT) to
counter gear rpm (NC). When conditions are appropriate, the ECM requests ”lock−up” by applying control
voltage to shift solenoid DSL. When the DSL is turned on, solenoid DSL applies pressure to the lock−up relay
valve and locks the torque converter clutch.
If the ECM detects no lock−up after lock−up has been requested or if it detects lock−up when it is not re-
quested, the ECM interprets this as a fault in the shift solenoid valve DSL or lock−up system performance.
The ECM will turn on the MIL and store the DTC.
Example:
When any of the following is met, the system judges it as a malfunction.
(a) There is a difference in rotation between before and after torque converters even when the ECM com-
mands lock−up.
(Engine speed is at least 75 rpm greater than input turbine speed.)
(b) There is no difference in rotation between before and after torque converters even when the ECM com-
mands lock−up off.
(The difference between engine speed and input turbine speed is less than 35 rpm.)
05JLJ−01

C90646
(+)
( − )
Shift Solenoid Valve DSL:
−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U 151E)05 −585
AVENSIS Supplement (RM 1045E)
4 INSPECT SHIFT SOLENOID VALVE(DSL)
(a) Remove the shift solenoid valve DSL.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
20_ C (68 _ F)
Solenoid Connector (DSL) − Solenoid
Body (DSL)11 to13

(c) Connect positive (+) lead to the terminal of solenoid con-
nector, negative ( −) lead to the solenoid body.
OK:
The solenoid valve makes an operating noise.
NG REPLACE SHIFT SOLENOID VALVE(DSL)
OK
5 CHECK TRANSMISSION WIRE (SEE PAGE 0 1− 32)
OK:
The connectors and pins are securely installed.
There is no open or short on the wire harness. NG REPAIR OR REPLACE TRANSMISSION WIRE(SEE PAGE 40 −1 6)
OK
6 INSPECT TRANSMISSION VALVE BODY ASSY (See chapter 2 in the problem symptoms table)
(SEE PAGE 05 −545)
OK:
There are no foreign objects on each valve and they operate smoothly. NG REPAIR OR REPLACE TRANSMISSION VALVEBODY ASSY (SEE PAGE 40 −1 9)
OK
7 INSPECT TORQUE CONVERTER CLUTCH ASSY (See Pub. No. RM 1018E,
page 40 −37)
OK:
The torque converter clutch operates normally. NG REPLACE TORQUE CONVERTER CLUTCHASSY
OK
REPAIR AUTOMATIC TRANSAXLE ASSY (SEE PAGE 40 −1)

05−580−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U 151E)
AVENSIS Supplement (RM 1045E)
DTC P0724 BRAKE SWITCH ”B” CIRCUIT HIGH
CIRCUIT DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling while driving in lock −up condition, when
brakes are suddenly applied.
When the brake pedal is depressed, this switch sends a signals to the ECM. Then the ECM cancels the op-
eration of the lock −up clutch while braking is in progress.
DTC No.DTC Detecting ConditionTrouble Area
P0724
The stop light switch remains ON even when the vehicle is
driven in a GO (30 km/h) and STOP (3 km/h) fashion 10 times.
(2 −trip detection logic).S Short in stop light switch signal circuit
S Stop light switch
S ECM
MONITOR DESCRIPTION
This DTC indicates that the stop light switch remains on. When the stop light switch remains ON during ”stop
and go” driving, the ECM interprets this as a fault in the stop light switch and the MIL comes on and the ECM
stores the DTC. The vehicle must stop (less than 3 km/h (2 mph)) and go (30 km/h ( 19 mph) or more) ten
times for two driving cycles in order to detect malfunction.
WIRING DIAGRAM
See page 05 −1 85.
05JLI −01

056IK−05
05 −564−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U 151E)
AVENSIS Supplement (RM 1045E)
DIAGNOSTIC TROUBLE CODE CHART
If a DTC is displayed during the DTC check, check the parts listed in the table below and proceed to the page
given.
HINT:
S *1 : F ... MIL (Malfunction Indicator Lamp) light up
S *2 : ’’ f ’’ mark means ECM memorizes the malfunction code if the ECM detects the DTC detection
condition.
S This DTC may be output when the clutch, brake and gear components etc. inside the automatic trans-
axle are damaged.
DTC No.
(See Page)Detection ItemTrouble AreaMIL *1Memory *2
P0500
(05 −1 83)Vehicle Speed Sensor ”A”
SCombination meter
S Open or short in vehicle speed sensor circuit
S Vehicle speed sensor
S ECM
Ff
P0705
(05 −566)Transmission Range Sensor Cir-
cuit Malfunction (PRNDL Input)SOpen or short in park/neutral position switch circuit
S Park/neutral position switch
S ECM
Ff
P07 10
(05 −57 1)Transmission Fluid Temperature
Sensor ”A” CircuitS Open or short in ATF temperature sensor circuit
S Transmission wire (ATF temperature sensor)
S ECM
Ff
P07 11
(05 −574)Transmission Fluid Temperature
Sensor ”A” PerformanceSOpen or short in ATF temperature sensor circuit
S Transmission wire (ATF temperature sensor)
S ECM
Ff
P07 12
(05 −57 1)Transmission Fluid Temperature
Sensor ”A” Circuit Low InputS Short in ATF temperature sensor circuit
S Transmission wire (ATF temperature sensor)
S ECM
Ff
P07 13
(05 −57 1)Transmission Fluid Temperature
Sensor ”A” Circuit High InputS Open in ATF temperature sensor circuit
S Transmission wire (ATF temperature sensor)
S ECM
Ff
P07 17
(05 −577)Turbine Speed Sensor Circuit No
Signal
SOpen or short in transmission revolution sensor NT (speed
sensor NT) circuit
S Transmission revolution sensor NT (speed sensor NT)
S ECM
S Automatic transaxle assembly
Ff
P0724
(05 −580)Brake Switch ”B” Circuit High
SShort in stop light switch circuit
S Stop light switch
S ECM
Ff
P074 1
(05 −582)Torque Converter Clutch Sole-
noid Performance
(Shift Solenoid Valve DSL)
S Shift solenoid valve DSL remains open or closed
S Valve body is blocked
S Shift solenoid valve DSL
S Torque converter clutch
S Automatic transaxle (clutch, brake or gear etc.)
S Line pressure is too low
S ECM
Ff
P0743
(05 −586)Torque Converter Clutch Circuit
Electrical
(Shift Solenoid Valve DSL)SOpen or short in shift solenoid valve DSL circuit
S Shift solenoid valve DSL
S ECM
Ff
P0746
(05 −589)Pressure Control Solenoid ”A”
Performance
(Shift Solenoid Valve SL 1)
SShift solenoid valve SL 1remains open or closed
S Valve body is blocked
S Shift solenoid valve SL 1
S Automatic transaxle (clutch, brake or gear etc.)
S ECM
Ff

−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U 151E)05 −565
AVENSIS Supplement (RM 1045E)
P0748
(05 −592)
Pressure Control Solenoid ”A”
Electrical
(Shift Solenoid Valve SL 1)SOpen or short in shift solenoid valve SL 1circuit
S Shift solenoid valve SL 1
S ECM
Ff
P0766
(05 −595)Shift Solenoid ”D” Performance
(Shift Solenoid Valve S4)
SShift solenoid valve S4 remains open or closed
S Valve body is blocked
S Shift solenoid valve S4
S Automatic transaxle (clutch, brake or gear etc.)
S ECM
Ff
P077 1
(05 −598)Shift Solenoid ”E” Performance
(Shift Solenoid Valve SR)
SShift solenoid valve SR remains open or closed
S Valve body is blocked
S Shift solenoid valve SR
S Automatic transaxle (clutch, brake or gear etc.)
S ECM
Ff
P0776
(05 −60 1)Pressure Control Solenoid ”B”
Performance
(Shift Solenoid Valve SL2)
S Shift solenoid valve SL2 remains open or closed
S Valve body is blocked
S Shift solenoid valve SL2
S Automatic transaxle (clutch, brake or gear etc.)
S ECM
Ff
P0778
(05 −604)Pressure Control Solenoid ”B”
Electrical
(Shift Solenoid Valve SL2)SOpen or short in shift solenoid valve SL2 circuit
S Shift solenoid valve SL2
S ECM
Ff
P0793
(05 −607)Intermediate Shaft Speed Sen-
sor ”A”
SOpen or short in transmission revolution sensor NC (speed
sensor NC) circuit
S Transmission revolution sensor NC (speed sensor NC)
S ECM
Ff
P0796
(05 −610)Pressure Control Solenoid ”C”
Performance
(Shift Solenoid Valve SL3)
SShift solenoid valve SL3 remains open or closed
S Valve body is blocked
S Shift solenoid valve SL3
S Automatic transaxle (clutch, brake or gear etc.)
S ECM
Ff
P0798
(05 −613)Pressure Control Solenoid ”C”
Electrical
(Shift Solenoid Valve SL3)SOpen or short in shift solenoid valve SL3 circuit
S Shift solenoid valve SL3
S ECM
Ff
P0982
(05 −616)Shift Solenoid ”B” Control Circuit
Low (Shift Solenoid Valve S4)SShort in shift solenoid valve S4 circuit
S Shift solenoid valve S4
S ECM
Ff
P0983
(05 −616)Shift Solenoid ”B” Control Circuit
High (Shift Solenoid Valve S4)SOpen in shift solenoid valve S4 circuit
S Shift solenoid valve S4
S ECM
Ff
P0985
(05 −619)Shift Solenoid ”E” Control Circuit
Low (Shift Solenoid Valve SR)SShort in shift solenoid valve SR circuit
S Shift solenoid valve SR
S ECM
Ff
P0986
(05 −619)Shift Solenoid ”E” Control Circuit
High (Shift Solenoid Valve SR)SOpen in shift solenoid valve SR circuit
S Shift solenoid valve SR
S ECM
Ff
P27 16
(05 −622)Pressure Control Solenoid ”D”
Electrical
(Shift Solenoid Valve SLT)SOpen or short in shift solenoid valve SLT circuit
S Shift solenoid valve SLT
S ECM
Ff

−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U 151E)05 −547
AVENSIS Supplement (RM 1045E)
2. Chapter 2: On −Vehicle Repair and Off −Vehicle Repair
( L :U 151E, U 151F AUTOMATIC TRANSAXLE Repair Manual Pub. No. RM 102 1U)
( L 1: Refer to Repair Manual RM 1018E)
SymptomSuspect AreaSee page
Vehicle does not move in forward position and in reverse positions
1. Valve body assy
2. U/D brake (B
3)
3. Torque converter clutch
40 −1 9
L
L 1
Vehicle does not move in R position
1. Valve body assy
2. Reverse clutch (C
2)
3. 1st & reverse brake (B
2)
40 −1 9
L
L
No up −shift ( 1st
2nd)1. Valve body assy
2. 2nd & O/D brake (B
1)
40 −1 9
L
No up −shift (2nd
3rd)1. Valve body assy
2. Direct and O/D clutch (C
0)
40 −1 9
L
No up −shift (3rd
4th)1. Valve body assy
2. 2nd & O/D brake (B
1)
40 −1 9
L
No up −shift (4th
5th)1. Valve body assy
2. U/D clutch (C
3)
40 −1 9
L
No down −shift (5th
4th)Valve body assy40−1 9
No down −shift (4th
3rd)Valve body assy40−1 9
No down −shift (3rd
2nd)Valve body assy40−1 9
No down −shift (2nd
1st)Valve body assy40 −1 9
No lock −up or No lock −up off1. Valve body assy
2. Torque converter clutch40 −1 9
L 1
Harsh engagement (N
D)
1. Valve body assy
2. C
1accumulator
3. Forward clutch (C
1)
4. One −way clutch No. 1(F
1)
5. U/D one −way clutch (F
2)
40 −1 9
L
L
L
L
Harsh engagement (Lock −up)1. Valve body assy
2. Torque converter clutch40 −1 9
L 1
Harsh engagement (N
R)
1. Valve body assy
2. C
2accumulator
3. Reverse clutch (C
2)
4. 1st & reverse brake (B
2)
40 −1 9
L
L
L
Harsh engagement ( 1st
2nd
3rd
4th
5th)Valve body assy40−1 9
Harsh engagement ( 1st
2nd)1. Valve body assy
2. 2nd & O/D brake (B
1)
40 −1 9
L
Harsh engagement (2nd
3rd)
1. Valve body assy
2. C
0accumulator
3. Direct and O/D clutch (C
0)
40 −1 9
L
L
Harsh engagement (3rd
4th)1. Valve body assy
2. 2nd & O/D brake (B
1)
40 −1 9
L
Harsh engagement (4th
5th)
1. Valve body assy
2. C
3accumulator
3. U/D clutch (C
3)
40 −1 9
L
L
Harsh engagement (5th
4th)1. Valve body assy
2. B
3accumulator
40 −1 9
L

05−548−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U 151E)
AVENSIS Supplement (RM 1045E)
Slip or shudder (Forward and reverse: After warm
−up)
1. Valve body assy
2. Oil strainer
3. Direct and O/D clutch (C
0)
4. Forward clutch (C
1)
5. U/D clutch (C
3)
6. 2nd & O/D brake (B
1)
7. U/D brake (B
3)
8. One −way clutch No. 1(F
1)
9. U/D one −way clutch (F
2)
1 0.Torque converter clutch
40 −1 9
40 −1 9
L
L
L
L
L
L
L
L 1
Slip or shudder (Particular position: Just after engine starts)Torque converter clutchL1
Slip or shudder (R position)1. Reverse clutch (C2)
2. 1st & reverse brake (B
2)
L
L
Slip or shudder ( 1st)
1. Forward clutch (C1)
2. One −way clutch No. 1(F
1)
3. U/D one −way clutch (F
2)
L
L
Slip or shudder (2nd)2nd & O/D brake (B1)L
Slip or shudder (3rd)Direct and O/D clutch (C0)L
Slip or shudder (4th)2nd & O/D brake (B1)L
Slip or shudder (5th)U/D clutch (C3)L
No engine braking ( 1st 4th: D position)U/D brake (B3)L
No engine braking ( 1st: L ( 1) position)1. Valve body assy
2. 1st & reverse brake (B
2)
40 −1 9
L
No engine braking (2nd: 2 position)1 . Valve body assy
2. 2nd & O/D brake (B
1)
40 −1 9
L
No engine braking (3rd: 3 position)U/D brake (B3)L
Poor acceleration (All positions)Torque converter clutchL 1
Poor acceleration (5th)1. U/D clutch (C3)
2. U/D planetary gear unitL
L
Engine stalls when starting off or stoppingTorque converter clutchL 1
No kick −downValve body assy40 −1 9

G23405Transmission Wire
− DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U151E)05−539
AVENSIS Supplement (RM1045E)
(9) Disconnect the connector of the transmission wire.
HINT:
Disconnect the connector only when performing the D position
stall test.
(10) Start the engine.
(11) Firmly depress the brake pedal, shift to the D posi-
tion, depress the accelerator pedal all the way down
and check the line pressure while the stall test is
performed.
Specified line pressure:
ConditionD position
Stall test931to1,031kPa
(9.5 to10.5 kgf/cm2,135 to150 psi)
(12) Turn the ignition switch off.
(13) Remove the SST, install the test plug A.
(14) Remove the test plug B, install the SST and start en-
gine.
SST 09992−00095 (09992−00231, 09992−00271)
(15) Connect the transmission wire connector, depress
the brake pedal firmly, shift to the R position and
check that the line pressure while the engine is id-
ling and during the stall test.
Specified line pressure:
ConditionR position
Idling672 to 742 kPa
(6.9 to 7.6 kgf/cm2,97to108 psi)
Stall test1,768 to1,968 kPa
(18.0 to 20.1kgf/cm2, 256 to 285 psi)
(16) Remove the SST, install the test plug B.
(17) Clear the DTC.
Evaluation:
ProblemPossible cause
If the measured values at all position are higherSShift solenoid valve (SLT) defective
SRegulator valve defective
If the measured values at all position are lower
SShift solenoid valve (SLT) defective
SRegulator valve defective
SOil pump defective
SU/D (Underdrive) direct clutch defective
If pressure is low in the D position onlySD position circuit fluid leak
SForward clutch defective
If pressure is low in the R position only
SR position circuit fluid leak
SReverse clutch defective
S1st and reverse brake defective