TOYOTA AVENSIS 2005 Service Repair Manual

G26426
Transmission Wire Side:
(Connector Front View):SR
E1
C82158C91565
SR
E13E12E11E10E9
ECM:
05−620−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U151E)
AVENSIS Supplement (RM1045E)
INSPECTION PROCEDURE
1 INSPECT TRANSMISSION WIRE(SR)
(a) Disconnect t he t r ansm ission wir e c onnect or f r om t he
transaxle.
(b) Measure the resistance according to the value(s) in the table below.
Standard:
Tester ConnectionSpecified Condition
20_ C (68 _ F)
9 − Body ground11 to 15

NG Go to step 3
OK
2 CHECK HARNESS AND CONNECTOR(TRANSMISSION WIRE − ECM)
(a) Connect the transmission connector to the transaxle.
(b) Disconnect the connector from the ECM.
(c) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
20_ C (68 _ F)
E12 − 9 (SR) − Body ground11 to 15

NG REPAIR OR REPLACE HARNESS OR
CONNECTOR (SEE PAGE 0 1− 32)
OK
REPLACE ECM (SEE PAGE 10− 29)

C90640
(+) (−)
Shift Solenoid Valve SR:
−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U151E)05−62 1
AVENSIS Supplement (RM1045E)
3 INSPECT SHIFT SOLENOID VALVE(SR)
(a) Remove the shift solenoid valve SR.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
20_ C (68 _ F)
Solenoid Connector (SR) − Solenoid
Body (SR)11 to 15

(c) Connect positive (+) lead to the terminal of solenoid con-
nector, negative ( −) lead to the solenoid body.
OK:
The solenoid makes an operating noise.
NG REPLACE SHIFT SOLENOID VALVE(SR)
OK
REPAIR OR REPLACE TRANSMISSION WIRE (SEE PAGE 40 −1 6)

G31765
Electronically Controlled
Transmission SolenoidE12ECM
E12
L
− W
L − R 15
14
SL3+
SL3 −
4
11
R
L
E1
SL3+
SL3 − +B
CPU
−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U151E)05−613
AVENSIS Supplement (RM1045E)
DTC P0798 PRESSURE CONTROL SOLENOID ”C”
ELECTRICAL (SHIFT SOLENOID VALVE
SL3)
CIRCUIT DESCRIPTION
Shifting from 1st to 5th is performed in combination with ”ON” and ”OFF” operation of the shift solenoid valves
SL1, SL2, SL3, S4 and SR which is controlled by the ECM. If an open or short circuit occurs in either of the
shift solenoid valves, the ECM controls the remaining normal shift solenoid valve to allow the vehicle to be
operated smoothly (Fail safe function).
DTC No.DTC Detection ConditionTrouble Area
P0798
ECM checks for an open or short circuit in shift solenoid valves
SL3 (1−trip detection logic)
S Output signal duty equals to 100%S Open or short in shift solenoid valve SL3 circuit
S Shift solenoid valve SL3
S ECM
MONITOR DESCRIPTION
The ECM commands gear shifts by turning the shift solenoid valves ”ON/OFF”. When there is an open or
short circuit in any shift solenoid valve circuit, the ECM detects the problem and illuminates the MIL and
stores the DTC. And the ECM performs the fail −safe function and turns the other shift solenoid valves in good
condition ”ON/OFF” (In case of an open or short circuit, the ECM stops sending current to the circuit.)
(see page 05 −560).
WIRING DIAGRAM
05CW3 −03

G26426
Transmission Wire Side:
(Connector Front View):SL3−
SL3+
E1
C82158C91565SL3+
SL3−
E13E12E11E10E9
ECM:
05−614−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U151E)
AVENSIS Supplement (RM1045E)
INSPECTION PROCEDURE
1 INSPECT TRANSMISSION WIRE(SL3)
(a) Disconnect t he t r ansm ission wir e c onnect or f r om t he
transaxle.
(b) Measure the resistance according to the value(s) in the table below.
Standard:
Tester ConnectionSpecified Condition
20_ C (68 _ F)
4 (SL3+) − 11 (SL3 −)5.0 to 5.6

(c) Measure the resistance according to the value(s) in the
table below.
Standard (Check for short):
Tester ConnectionSpecified Condition
4 (SL3+) − Body ground10 k
or higher
11 (SL3 −)− Body ground
NG Go to step 3
OK
2 CHECK HARNESS AND CONNECTOR(TRANSMISSION WIRE − ECM)
(a) Connect the transmission connector to the transaxle.
(b) Disconnect the connector from the ECM.
(c) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
20_ C (68 _ F)
E12 − 15 (SL3+) − E12 − 14 (SL3 −)5.0 to 5.6

(d) Measure the resistance according to the value(s) in the
table below.
Standard (Check for short):
Tester ConnectionSpecified Condition
E12− 15 (SL3+) − Body ground10 k
or higher
E12 − 14 (SL3 −)− Body ground
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR (SEE PAGE 0 1− 32)
OK
REPLACE ECM (SEE PAGE 10− 29)

G20767
2
1
(+)
( − )
2
1
Shift Solenoid Valve SL3:
−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U151E)05−615
AVENSIS Supplement (RM1045E)
3 INSPECT SHIFT SOLENOID VALVE(SL3)
(a) Remove the shift solenoid valve SL3.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
20_ C (68 _ F)
1 − 25.0 to 5.6

(c) Connect the positive (+) lead with a 21 W bulb to terminal
2 and the negative ( −) lead to terminal 1 of the solenoid
valve connector, then check the movement of the valve.
OK:
The solenoid makes an operating noise.
NG REPLACE SHIFT SOLENOID VALVE(SL3)
OK
REPAIR OR REPLACE TRANSMISSION WIRE (SEE PAGE 40 −1 6)

05−610−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U 151E)
AVENSIS Supplement (RM 1045E)
DTC P0796 PRESSURE CONTROL SOLENOID ”C”
PERFORMANCE (SHIFT SOLENOID VALVE
SL3)
SYSTEM DESCRIPTION
The ECM uses signals from the vehicle speed sensor to detect the actual gear position ( 1st, 2nd, 3rd, 4th
or 5th gear).
Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical
troubles of the shift solenoid valves and valve body.
DTC No.DTC Detecting ConditionTrouble Area
P0796The gear required by the ECM does not match the actual gear
when driving (2 −trip detection logic)
S Shift 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
MONITOR DESCRIPTION
The ECM commands gear shifts by turning the shift solenoid valves ”ON/OFF”. According to the input shaft
revolution, intermediate (counter) shaft revolution and output shaft revolution, the ECM detects the actual
gear position ( 1st, 2nd, 3rd, 4th or 5th gear position). When the gear position commanded by the ECM and
the actual gear position are not same, the ECM illuminates the MIL and stores the DTC.
INSPECTION PROCEDURE
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 method
to shorten labor time.
It is possible to display the DATA LIST during the ACTIVE TEST.
(a) Turn the ignition switch off.
(b) Connect the hand −held tester to the DLC3.
(c) Turn the ignition switch to the ON position.
(d) Push the ”ON” button of the hand −held tester.
(e) Select the item ”DIAGNOSIS / OBD/MOBD / ACTIVE TEST / SHIFT”.
(f) According to the display on tester, perform the ”ACTIVE TEST”.
HINT:
While driving, the shift position can be forcibly changed with the hand −held tester.
Comparing the shift position commanded by the ACTIVE TEST with the actual shift position enables you
to confirm the problem (see page 05 −560).
ItemTest DetailsDiagnostic Note
SHIFT
[Test Details]
Operate the shift solenoid valve and set the each shift position by your-
self.
[Vehicle Condition]
Less than 50 km/h (3 1mph)
[Others]
S Press ”
” button: Shift up
S Press ” ” button: Shift down
Possible to check the operation of
the shift solenoid valves.
HINT:
SThis test can be conducted when the vehicle speed is 50 km/h (3 1mph) or less.
SThe shift position commanded by the ECM is shown in the DATA LIST/SHIFT display on the hand −held
tester.
05CW2 −02

G20767
2
1
(+)
( − )
2
1
Shift Solenoid Valve SL3:
−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U 151E)05 −611
AVENSIS Supplement (RM 1045E)
1 CHECK OTHER DTCS OUTPUT(IN ADDITION TO DTC P0796)
(a) Connect the hand −held tester to the DLC3.
(b) Turn the ignition switch to the ON position and push the hand −held tester main switch ON.
(c) Select the item ”DIAGNOSIS / OBD/MOBD / DTC INFO / CURRENT CODES”.
(d) Read the DTCs using the hand −held tester.
Result:
Display (DTC output)Proceed to
Only ”P0796” is outputA
”P0796” and other DTCsB
HINT:
If any other codes besides ”P0796” is output, perform the troubleshooting for those DTCs first.
B GO TO RELEVANT DTC CHART(SEE PAGE 05 −564)
A
2 INSPECT SHIFT SOLENOID VALVE(SL3)
(a) Remove the shift solenoid valve SL3.
(b) Measure the resistance according to the value(s) in the table below.
Standard:
Tester ConnectionSpecified Condition
20_C (68 _F)
1− 25.0 to 5.6 
(c) Connect the positive (+) lead with a 2 1W bulb to terminal
2 and the negative ( −) lead to terminal 1of the solenoid
valve connector, then check the movement of the valve.
OK:
The solenoid makes an operating noise.
NG REPLACE SHIFT SOLENOID VALVE(SL3)
OK

05−612−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U 151E)
AVENSIS Supplement (RM 1045E)
3 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
4 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 OR REPLACE AUTOMATIC TRANSAXLE ASSY (SEE PAGE 40 −1)

GND
C93866
1 V/DIV
1 ms/DIV
G31763
ECM
NC+
NC−
E1234 26
LG
LG−B 2 1 C5
Counter Gear Speed Sensor
E12
5V
E1
− DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U151E)05−607
AVENSIS Supplement (RM1045E)
DTC P0793 INTERMEDIATE SHAFT SPEED SENSOR
”A”
CIRCUIT DESCRIPTION
This sensor detects the rotation speed of the counter gear. By comparing the counter gear speed signal (NC)
with the direct clutch speed sensor signal (NT), the ECM detects the shift timing of the gears and appropriate-
ly controls the engine torque and hydraulic pressure according to various conditions. Thus smooth gear shift-
ing is performed.
DTC No.DTC Detection ConditionTrouble Area
P0793
ECM detects conditions (a), (b) and (c) continuity for 5 sec. or
more: (1−trip detection logic)
(a) Vehicle speed: 50 km/h (31 mph) or more
(b) Park/neutral position switch (NSW) is OFF
(c) Speed sensor (NC): less than 300 rpmSOpen or short in transmission revolution sensor NC (speed
sensor NC) circuit
STransmission revolution sensor NC (speed sensor NC)
SECM
Reference (Using an oscilloscope):
Check the waveform between the terminals NC+ and
NC−of the ECM connector.
Standard: Refer to the illustration.
TerminalNC+−NC−
Tool setting1V/DIV, 1ms/DIV
Vehicle conditionVehicle speed 30 km/h (19 mph): (3rd gear)
Engine speed 1,400 rpm
MONITOR DESCRIPTION
The NC terminal of ECM detects a revolution signal from the speed sensor (NC) (counter gear rpm). The
ECM calculates a gearshift comparing the speed sensor (NT) with the speed sensor (NC).
While the vehicle is operating in 2nd, 3rd, 4th or 5th gear in the shift position of D, if the counter gear revolu-
tion is less than 300 rpm
*1although the output shaft revolution is more than 1,000 rpm*2, the ECM detects
the trouble, illuminates the MIL and stores the DTC.
*1: Pulse is not output or is irregularly output.
*2: The vehicle speed is 50 km/h (31 mph) or more.
WIRING DIAGRAM
05JLK−01

BR3795OK NG
05−608− DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U151E)
AVENSIS Supplement (RM1045E)
INSPECTION PROCEDURE
HINT:
According to the DATA LIST displayed by the hand−held tester, you can read the value of the switch, sensor,
actuator and so on without parts removal. Reading the DATA LIST as the first step of troubleshooting is one
method to shorten labor time.
(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 to the ON position.
(e) Push the ”ON” button of the hand−held tester.
(f) Select the item ”DIAGNOSIS / OBD/MOBD / DATA LIST”.
(g) According to the display on tester, read the ”DATA LIST”.
ItemMeasurement Item/
Range (display)Normal Condition
SPD (NC)Counter Gear Speed/
display: 50 r/min
[HINT]
3rd when shift lever position is D position (After
warming up the engine);
SIntermediate shaft speed (NC) becomes close
to the engine speed.
HINT:
SSPD (NC) is always 0 while driving:
Open or short in the sensor or circuit.
SSPD (NC) is always more than 0 and less than 300 rpm while driving the vehicle at 50 km/h (31 mph)
or more:
Sensor trouble, improper installation, or intermittent connection trouble of the circuit.
1INSPECT SPEED SENSOR INSTALLATION
(a) Check the speed sensor installation.
OK:
The installation bolt is tightened properly and there is
no clearance between the sensor and transaxle case.
NG REPLACE SPEED SENSOR(NC)
OK