TOYOTA AVENSIS 2005 Service Repair Manual

D30680
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)05±1017
AVENSIS REPAIR MANUAL (RM1018E)
3 INSPECT SHIFT SOLENOID VALVE(SL)
(a) Remove the shift solenoid valve SL.
(b) Measure the resistance between terminal SL of shift sole-
noid valve and the solenoid valve body.
OK:
Resistance: 11 to 15
at 20
C (68
F)
(c) Connect the positive (+) lead to the terminal of solenoid
valve connector and the negative (±) lead to the solenoid
valve body.
OK:
The solenoid valve makes an operating noise.
OK REPAIR OR REPLACE TRANSMISSION WIRE
NG
REPLACE SHIFT SOLENOID VALVE(SL)

D30680
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)05±1013
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0770 SHIFT SOLENOID ºEº MALFUNCTION
(SHIFT SOLENOID VALVE SL)
SYSTEM DESCRIPTION
The ECM uses the signals from the throttle position sensor, air±flow meter and crankshaft position sensor
to monitor the engagement condition 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 mechanical trouble of the shift solenoid valve SL, valve body and torque converter
clutch or automatic transaxle (clutch, brake or gear etc.).
DTC No.DTC Detecting ConditionTrouble Area
P0770

Lock±up does not occur when driving in the lock±up range
(normal driving at 80 km/h
50 mph), or lock±up remains ON
in the lock±up OFF range.
(2±trip detection logic)

When lock±up is ON, clutch or brake slips or gear is broken.
(2±trip detection logic)
Shift solenoid valve SL is stuck open or closed

Valve body blocked or stuck

Shift solenoid valve SL

Torque converter clutch

Automatic transaxle (clutch, brake or gear etc.)
INSPECTION PROCEDURE
1 INSPECT SHIFT SOLENOID VALVE(SL)
(a) Remove the shift solenoid valve SL.
(b) Measure the resistance between terminal SL of shift sole-
noid valve and the solenoid valve body.
OK:
Resistance: 11 to 15
at 20C (68F)
(c) Connect the positive (+) lead to the terminal of solenoid
valve connector and the negative (±) lead to the solenoid
valve body.
OK:
The solenoid valve makes an operating noise.
NG REPLACE SHIFT SOLENOID VALVE(SL)
OK
2 INSPECT TRANSMISSION VALVE BODY ASSY(See chapter 2 in the problem
symptoms table)
NG REPAIR OR REPLACE TRANSMISSION VALVE
BODY ASSY
OK
05C8J±01

05±1014± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)
AVENSIS REPAIR MANUAL (RM1018E)
3 INSPECT TORQUE CONVERTER CLUTCH ASSY
NG REPLACE TORQUE CONVERTER CLUTCH
ASSY
OK
REPAIR AUTOMATIC TRANSAXLE ASSY

Range
NORMALSHIFT SOLENOID VALVE
S1 MALFUNCTIONING
Solenoid valveS1 S2GearSHIFT SOLENOID VALVE
S2 MALFUNCTIONINGBOTH SHIFT SOLENOID
VALVES MALFUNCTIONINGSolenoid valve
S1 S2GearSolenoid valve
S1 S2GearGear when shift selector is
manually operated
D
2
1ON
ONON
OFF
OFF
OFF
OFF ON
ON
ONON
OFF
OFF OFF
ON
ON OFFON1st
2nd
3rd
O/D
1st
2nd
3rd
1st
2ndX
X
X
X
X
X
X
X
XOFF
OFF
ON
OFFOFF
OFF
OFF3rd 3rd
O/D
3rd
3rd
O/D
3rdX
X
X
X
X
X
X
X
X ON
ON OFF OFF
OFF
ON
ON2nd
2nd
2nd2nd3rd 3rd
3rd
2nd
2nd3rd 3rd 3rd
3rd
3rd 3rd
3rd
3rd
3rd
X: MalfunctionsOFF
OFF3rd
3rdON
ON
(S range)
(S range)
05±1010± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0753 SHIFT SOLENOID ºAº ELECTRICAL (SHIFT
SOLENOID VALVE S1)
DTC P0758 SHIFT SOLENOID ºBº ELECTRICAL (SHIFT
SOLENOID VALVE S2)
CIRCUIT DESCRIPTION
Shifting from 1st to O/D is performed in combination with ON and OFF operation of the shift solenoid valves
S1 and S2 controlled by ECM. If an open or short circuit occurs in either of the solenoid valves, the ECM
controls the remaining normal solenoid valve to allow the vehicle to be operated smoothly (Fail safe func-
tion).
Fail safe function:
If either of the solenoid valve circuits develops an open or short, the ECM turns the other solenoid valve ON
and OFF to shift to the gear positions shown in the table below. The ECM also turns the shift solenoid valve
ST OFF at the same time. If both solenoids malfunction, hydraulic control cannot be performed electronically
and must be done manually.
Manual shifting as shown in the above table must be done (In the case of a short circuit, the ECM stops send-
ing current to the short circuited solenoid).
DTC No.DTC Detection ConditionTrouble Area
P0753
P0758
ECM checks for an open or short circuit in shift solenoid valve
S1 or S2 circuit when it changes
ECM records DTC P0753 or P0758 if condition (a) or (b) is
detected:
(a) When solenoid is energized, solenoid resistance is 8
or
less and it is counted
(b) When solenoid is not energized, solenoid resistance is 100
k
or more and it is counted

Open or short in shift solenoid valve S1/S2 circuit

Shift solenoid valve S1/S2

ECM
HINT:
Check the shift solenoid valve S1 when DTC P0753 is output and check the shift solenoid valve S2 when
DTC P0758 is output.
05C8I±01

G22782
5
10P±L
PE1215
14S1
S2 E1
ECT Solenoid
S1
S2 W
BECM
E12
D25234
S1
S2
C95812
S1 S2
E1
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)05±1011
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT TRANSMISSION WIRE(S1/S2)
(a) Disconnect the transmission wire connector from the
transaxle.
(b) Measure the resistance between terminal S1/S2 of trans-
mission wire connector and body ground.
OK:
Resistance: 11 to 15 at 20
C (68
F)
NG Go to step 3
OK
2 CHECK HARNESS AND CONNECTOR(TRANSMISSION WIRE ± ECM)
(a) Connect the transmission wire connector to the transaxle.
(b) Disconnect the ECM connector.
(c) Measure the resistance between terminals.
OK:
Resistance:
S1 ± E1: 11 to 15 at 20
C (68
F)
S2 ± E1: 11 to 15 at 20
C (68
F)
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
CHECK AND REPLACE ECM

D30679
S1
S1
S2
S2
05±1012± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)
AVENSIS REPAIR MANUAL (RM1018E)
3 INSPECT SHIFT SOLENOID VALVE(S1/S2)
(a) Remove the shift solenoid valve S1/S2.
(b) Measure the resistance between the solenoid valve con-
nector and the solenoid valve body.
OK:
Resistance: 11 to 15
at 20
C (68
F)
(c) Connect the positive (+) lead to the terminal of solenoid
valve connector and the negative (±) lead to the solenoid
valve body.
OK:
The solenoid valve makes an operating noise.
NG REPLACE SHIFT SOLENOID VALVE(S1/S2)
OK
REPAIR OR REPLACE TRANSMISSION WIRE

± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)05±1007
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0750 SHIFT SOLENOID ºAº MALFUNCTION
(SHIFT SOLENOID VALVE S1)
DTC P0755 SHIFT SOLENOID ºBº MALFUNCTION
(SHIFT SOLENOID VALVE S2)
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 O/D gear).
Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect the mechanical
trouble of the shift solenoid valves, the valve body or automatic transaxle (clutch, brake or gear etc.).
DTC No.DTC Detecting ConditionTrouble Area
P0750
The gear required by the ECM does not match the actual gear

Shift solenoid valve S1 is stuck open or closed

Valve body is blocked up or stuck

Automatic transaxle (clutch, brake or gear etc.)
P0755
The gear required by the ECM does not match the actual gear
when driving (2±trip detection logic)
Shift solenoid valve S2 is stuck open or closed

Valve body is blocked up or stuck

Automatic transaxle (clutch, brake or gear etc.)
05C8H±01

D30679
S1
S1
S2
S2
05±1008± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1 INSPECT SHIFT SOLENOID VALVE(S1/S2)
(a) Remove the shift solenoid valve S1/S2.
(b) Measure the resistance between the solenoid connector
and the solenoid valve body.
OK:
Resistance: 11 to 15
at 20
C (68
F)
(c) Connect the positive (+) lead to the terminal of solenoid
valve connector and the negative (±) lead to the solenoid
valve body.
OK:
The solenoid valve makes an operating noise.
NG REPLACE SHIFT SOLENOID VALVE(S1/S2)
OK

± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)05±1009
AVENSIS REPAIR MANUAL (RM1018E)
2 INSPECT TRANSMISSION VALVE BODY ASSY(See chapter 2 in the problem
symptoms table)
NG REPAIR OR REPLACE TRANSMISSION VALVE
BODY ASSY
OK
REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSY

C54864
THOE2
±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U341E)05±1005
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0711TRANSMISSION FLUID TEMPERATURE
SENSOR CIRCUIT RANGE/PERFORMANCE
CIRCUIT DESCRIPTION
The ATF temperature sensor converts the fluid temperature into a resistance v\
alue which is input into the
ECM.
DTC No.DTC Detection ConditionTrouble Area
P0711
Both (a) and (b) are detected: (2±trip detection logic)
(a)After 12 sec. of engine start, temp. of atmosphere and that
of engine coolant is more than ±10 C
(b)After normal driving for over 20 min. and 10 km, ATF temp.
is less than 10 C

Open or short in ATF temp. sensor circuit

Transmission wire (ATF temperature sensor)

ECM
WIRING DIAGRAM
See page 05±1003.
INSPECTION PROCEDURE
1 INSPECT TRANSMISSION WIRE(ATF TEMPERATURE SENSOR)
(a) Disconnect the transmission wire connector from the
transaxle.
(b) Measure the resistance between terminals THO and E2.
OK:
Temperature: C ( F)Resistance: k

10 (50)6.4
110 (230)0.2
(c) Check the continuity between the wire harness side con-
nectors.
OK:
Standard (Check for a short):
SymbolsSpecified condition
THO ± Body groundNo continuityE2 ± Body groundNo continuity
NG REPAIR OR REPLACE TRANSMISSION WIRE
OK
05C8G±01