TOYOTA AVENSIS 2005 Service Repair Manual

D25234SB
Transmission Wire Side:
(Connector Front View):E1
C95812
SB
ECM: E13
E12E10E9
05–284–
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
INSPECTION PROCEDURE
1 INSPECT TRANSMISSION WIRE(SB)
(a) Disconnect the transmission wire connector from the transaxle.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
20 C (68 F)
7 – Body ground11 to 15 Ω
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 – 8 (SB) – Body ground11 to 15 Ω
NG REPAIR OR REPLACE HARNESS OR
CONNEC TOR ( SEE PAGE 01–32 )
OK
REPLACE ECM

D09034
Shift Solenoid Valve SB:
– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)05–285
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
3 INSPECT SHIFT SOLENOID VALVE(SB)
(a) Remove the shift solenoid valve SB.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
20 C (68 F)
Solenoid Connector (SB) – Solenoid
Body (SB)11 to 15 Ω
(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(SB)
OK
REPAIR OR REPLACE TRANSMISSION WIRE (See Pub. No. RM1018E, page 40–51)

G31165
E1
Electronically Controlled
Transmission SolenoidECM
10
E12 S2
10
B
P
S2 +B
CPU
05–280–
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
DTC P0976 SHIFT SOLENOID ”B” CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE S2)
DTC P0977 SHIFT SOLENOID ”B” CONTROL CIRCUIT HIGH (SHIFT SOLENOID VALVE S2)
CIRCUIT DESCRIPTION
Shifting from 1st to 4th is performed in combination with ”ON” and ”OFF\
” operation of the shift solenoid valves
S1 and S2 which is controlled by the ECM. If an open or short circuit occu\
rs 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
P0976ECM detects short in solenoid valve S2 circuit 2 times when
solenoid valve S2 is operated (1–trip detection logic)
Short in shift solenoid valve S2 circuit

Shift solenoid valve S2

ECM
P0977ECM detects open in solenoid valve S2 circuit 2 times when
solenoid valve S2 is not operated (1–trip detection logic)
Open in shift solenoid valve S2 circuit

Shift solenoid valve S2

ECM
MONITOR DESCRIPTION
The ECM commands gear shifts by turning the shift solenoid valves ”ON/OF\
F”. 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 o\
ther shift solenoid valves in good
condition ”ON/OFF” (In case of an open or short circuit, the ECM stops sen\
ding current to the circuit.)
(see page 05–241 ).
WIRING DIAGRAM
05L2L–01

D25234S2
Transmission Wire Side:
(Connector Front View):E1
C95812
S2
ECM: E13
E12E10E9
–
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)05–281
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
INSPECTION PROCEDURE
1 INSPECT TRANSMISSION WIRE(S2)
(a) Disconnect the transmission wire connector from the
transaxle.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
20 C (68 F)
10 – Body ground11 to 15 Ω
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 – 10 (S2) – Body ground11 to 15 Ω
NG REPAIR OR REPLACE HARNESS OR
CONNEC TOR ( SEE PAGE 01–32 )
OK
REPLACE ECM

G33708
Shift Solenoid Valve S2:
05–282– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
3 INSPECT SHIFT SOLENOID VALVE(S2)
(a) Remove the shift solenoid valve S2.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
20 C (68 F)
Solenoid Connector (S2) – Solenoid
Body (S2)11 to 15 Ω
(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(S2)
OK
REPAIR OR REPLACE TRANSMISSION WIRE (See Pub. No. RM1018E, page 40–51)

G31165
E1
Electronically Controlled
Transmission SolenoidECM
20
E12 ST
2
Y
R–B
ST +B
CPU
05–274–
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From Februar y, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
DTC P0787 SHIFT/TIMING SOLENOID LOW (SHIFT SOLENOID VALVE ST)
DTC P0788 SHIFT/TIMING SOLENOID HIGH (SHIFT SOLENOID VALVE ST)
CIRCUIT DESCRIPTION
The shift solenoid valve ST is used for shifting from the 3rd to 4th gear, and from the 4th to 3rd gear. Actuates
solenoid valves ST and SLT in accordance with the signals from the ECM, and guides this output pr\
essure
directly to 4–3 shift timing valve and 3–4 shift timing valve in order to regulate the line pressure that acts on
the B
1 brake and C1 clutch.
DTC No.DTC Detection ConditionTrouble Area
P0787ECM detects short in solenoid valve ST circuit 4 times when
solenoid valve ST is operated (1–trip detection logic)

Short in shift solenoid valve ST circuit

Shift solenoid valve ST

ECM
P0788ECM detects open in solenoid valve ST circuit 4 times when
solenoid valve ST is not operated (1–trip detection logic)
Open in shift solenoid valve ST circuit

Shift solenoid valve ST

ECM
MONITOR DESCRIPTION
The ECM commands gear shifts by turning the shift solenoid valves ”ON/OF\
F”. 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 o\
ther shift solenoid valves in good
condition ”ON/OFF” (In case of an open or short circuit, the ECM stops sen\
ding current to the circuit.)
(see page 05–241 ).
WIRING DIAGRAM
05CVW–07

D25234
ST
Transmission Wire Side:
(Connector Front View):
E1
C95812
ST
ECM: E13
E12E10E9
–
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)05–275
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
INSPECTION PROCEDURE
1 INSPECT TRANSMISSION WIRE(ST)
(a) Disconnect the transmission wire connector from the
transaxle.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
20 C (68 F)
2 – Body ground11 to 15 Ω
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 – 20 (ST) – Body ground11 to 15 Ω
NG REPAIR OR REPLACE HARNESS OR
CONNEC TOR ( SEE PAGE 01–32 )
OK
REPLACE ECM

D09034
Shift Solenoid Valve ST:
05–276– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
3 INSPECT SHIFT SOLENOID VALVE(ST)
(a) Remove the shift solenoid valve ST.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
20 C (68 F)
Solenoid Connector (ST) – Solenoid
Body (ST)11 to 15 Ω
(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(ST)
OK
REPAIR OR REPLACE TRANSMISSION WIRE (See Pub. No. RM1018E, page 40–51)

05–268– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
DTC P0751 SHIFT SOLENOID ”A” PERFORMANCE
(SHIFT SOLENOID VALVE S1)
SYSTEM DESCRIPTION
The ECM uses signals from the vehicle speed sensor and speed sensor NT to detect the actual gear position
(1st, 2nd, 3rd or 4th gear).
Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical
problems of the shift solenoid valves and valve body.
DTC No.DTC Detecting ConditionTrouble Area
P0751The gear required by the ECM does not match the actual gear
when driving (2–trip detection logic)

Shift solenoid valve S1 remains open or closed

Valve body is blocked

Shift solenoid valve S1

Automatic transaxle (clutch, brake or gear etc.)

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 or 4th gear position). When the gear position commanded by the ECM and the
actual gear position are not same, the ECM illuminates the MIL.
Example:
When either condition (a) or (b) is met, the ECM detects a malfunction.
(a) The ECM commands the 1st gear, but the actual gear is 2nd.
(b) The ECM commands the 2nd gear, but the actual gear is 1st.
05CVV–05

–
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)05–269
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
INSPECTION PROCEDURE
HINT:
Performing the Intelligent Tester II Active Test allows relay, Vacuum Switching Valve (VSV), actuator and
other items to be operated without removing any parts. Performing the Active Test early in troubleshooting
is one way to shorten labor time. The Data List can be displayed during \
the Active Test.
(a) Warm up the engine.
(b) Turn the ignition switch off.
(c) Connect the Intelligent Tester II to the DLC3.
(d) Turn the ignition switch to the ON position.
(e) Turn on the tester.
(f) Clear the DTC.
(g) Select the item ”Enter / Power train / Engine and ECT / Active Test / Control the Shift Position”.
(h) Follow the instructions on the tester and read the Active Test.
HINT:
While driving, the shift position can be forcibly changed with the Intel\
ligent Tester II.
Comparing the shift position commanded by the ACTIVE TEST with the actua\
l shift position enables you
to confirm the problem ( see page 05–241).
ItemTest DetailsDiagnostic Note
Control the Shift Position
[Test Details]
Operate the shift solenoid valve and set the each shift position by your\
-
self.
[Vehicle Condition]

IDL: ON

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 valves.
HINT:

This test can be conducted when the vehicle speed is 50 km/h (31 mph) or l\
ess.

The shift position commanded by the ECM is shown in the DATA LIST (Shift Status) display on the
Intelligent Tester II.
1 CHECK OTHER DTCS OUTPUT(IN ADDITION TO DTC P0751)
(a) Connect the Intelligent Tester II to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Turn on the tester.
(d) Select the item ”Power train / Engine and ECT / DTC / Current or Pend\
ing”.
(e) Read the DTCs using the Intelligent Tester II.
Result:
Display (DTC output)Proceed to
Only ”P0751” is outputA
”P0751” and other DTCsB
HINT:
If any other codes besides ”P0751” is output, perform the troublesho\
oting for those DTCs first.
B GO TO RELEVANT DTC CHART(SEE PAGE 05–245 )
A