TOYOTA AVENSIS 2005 Service Repair Manual

C95813THOE2
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))05±901
AVENSIS REPAIR MANUAL (RM1018E)
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 THO and E2.
OK:
Temperature:
C (
F)Resistance: k

10 (50)6.4
110 (230)0.2
(d) 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 HARNESS OR
CONNECTOR
OK
CHECK AND REPLACE ECM

D26539
E1
ECT SolenoidECM
11
DSL
E12 L±B
3 DSL G
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))05±897
AVENSIS REPAIR MANUAL (RM1018E)
DTC P2769/64 TORQUE CONVERTER CLUTCH SOLENOID
CIRCUIT LOW (SHIFT SOLENOID VALVE
DSL)
DTC P2770/64 TORQUE CONVERTER CLUTCH SOLENOID
CIRCUIT HIGH (SHIFT SOLENOID VALVE
DSL)
CIRCUIT DESCRIPTION
The shift solenoid valve DSL is turned ON and OFF by signals from the ECM in order to control the hydraulic
pressure operation the lock±up relay valve, which then the controls operation of the lock±up clutch.
DTC No.DTC Detection ConditionTrouble Area
P2769/64ECM detects short in solenoid valve DSL circuit 4 times when
solenoid valve DSL is operated (2 trip detection logic)
Short in shift solenoid valve DSL circuit

Shift solenoid valve DSL

ECM
P2770/64ECM detects open in solenoid valve DSL circuit 4 times when
solenoid valve DSL is not operated (2 trip detection logic)
Open in shift solenoid valve DSL circuit

Shift solenoid valve DSL

ECM
Fail safe function:
If the ECM detects a malfunction, it turns the shift solenoid valve DSL OFF.
WIRING DIAGRAM
05C8Y±01

C54864
DSL
C95812DSL E1
05±898± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))
AVENSIS REPAIR MANUAL (RM1018E)
1 INSPECT TRANSMISSION WIRE(DSL)
(a) Disconnect the transmission wire connector from the
transaxle.
(b) Measure the resistance between terminal DSL of the
transmission wire connector and body ground.
OK:
Resistance: 11 to 13 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 DSL and E1
of the ECM connector.
OK:
Resistance: 11 to 13 at 20
C (68
F)
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
CHECK AND REPLACE ECM




D03728
(+)
(±)
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))05±899
AVENSIS REPAIR MANUAL (RM1018E)
3 INSPECT SHIFT SOLENOID VALVE(DSL)
(a) Remove the shift solenoid valve DSL.
(b) Measure the resistance between terminal DSL of shift so-
lenoid valve DSL and the solenoid body.
OK:
Resistance: 11 to 13
at 20
C (68
F)
(c) Connect the positive (+) lead to the terminal of solenoid
connector and the negative (±) lead to the solenoid body.
OK:
The solenoid valve makes an operating noise.
NG REPLACE SHIFT SOLENOID VALVE(DSL)
OK
REPAIR OR REPLACE TRANSMISSION WIRE

D02290
Line Pressure
Control Pressure
Current Flow to Solenoid
BE4056
ON
OFF
1 cycle 05±894
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))
AVENSIS REPAIR MANUAL (RM1018E)
DTC P2716/77 PRESSURE CONTROL SOLENOID ºDº
ELECTRICAL (SHIFT SOLENOID SLT)
CIRCUIT DESCRIPTION
The throttle pressure that is applied to the primary regulator
valve (which modulates the line pressure) causes the solenoid
valve SLT, under electronic control, to precisely and minutely
modulate and generate the line pressure according to the ex-
tent of the accelerator pedal depressed or the output of engine
power.
This controls the line pressure and provides smooth shifting.
Upon receiving a signal of the throttle valve opening angle, the
ECM controls the line pressure by sending a predetermined (*)
duty ratio to the solenoid valve, modulating the line pressure
and generating throttle pressure.
(*): Duty Ratio
The duty ratio is the ratio of the period of continuity in one cycle.
For example, if A is the period of continuity in one cycle, and B
is the period of non±continuity, then
Duty Ratio=A/(A+B) x 100 (%)
DTC No.DTC Detection ConditionTrouble Area
P2716/77
Condition (a) or (b) below is detected 1 sec. or more:
(1 trip detection logic)
(a) SLT±
terminal: 0V
(b) SLT±
terminal: 12V

Open or short in shift solenoid valve SLT circuit

Shift solenoid valve SLT

ECM
05C8X±01

D26542
E1
ECT SolenoidECM
17
SLT+ E13 P±L
2 O
16
SLT± E13 P
7 SLT+
SLT± G
D25234
SLT+
SLT±
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))05±895
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT TRANSMISSION WIRE(SLT)
(a) Disconnect the transmission wire connector from the
transaxle.
(b) Measure the resistance between terminals SLT+ and
SLT± of the transmission wire connector.
OK:
Resistance: 5.0 to 5.6 at 20
C (68
F)
(c) Measure the resistance between body ground and that
SLT+ as well as SLT± of the transmission wire connector.
OK:
Resistance: 1M or higher
NG Go to step 3
OK

C95813SLT+
SLT±
D25466
12
12
(+)
(±)
05±896± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))
AVENSIS REPAIR MANUAL (RM1018E)
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 SLT+ and
SLT± of the ECM connector.
OK:
Resistance: 5.0 to 5.6
at 20
C (68
F)
(d) Measure the resistance between body ground and that
SLT+ as well as SLT± of the ECM connector.
OK:
Resistance: 1M
or higher
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
CHECK AND REPLACE ECM
3 INSPECT SHIFT SOLENOID VALVE(SLT)
(a) Remove the shift solenoid valve SLT.
(b) Measure the resistance between terminals of the shift so-
lenoid valve SLT.
OK:
Resistance: 5.0 to 5.6
at 20
C (68
F)
(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 sole-
noid valve.
OK:
The solenoid valve makes an operating noise.
NG REPLACE SHIFT SOLENOID VALVE(SLT)
OK
REPAIR OR REPLACE TRANSMISSION WIRE

D26541
C3
Counter Gear Speed
SensorECM
26
E12 NC+ LG
2
34
E12 NC± LG±B 1 05±892
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0793/67 INTERMEDIATE SHAFT SPEED SENSOR
ºAº
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
P0793/67
ECM detects conditions (a), (b), (c) and (d) continuity for 5 sec.
or more: (2 trip detection logic)
(a) Vehicle speed: 50 km/h (20 mph) or more
(b) 2nd, 3rd or O/D gear
(c) Solenoid valves and park/neutral position switch are normal
(d) NC < 300 rpm

Open or short in speed sensor (NC) circuit

Speed sensor (NC)

ECM
WIRING DIAGRAM
05C8W±01

C58536
C95812
NC+
NC±
3
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))05±893
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1 INSPECT SPEED SENSOR(NC)
(a) Disconnect the speed sensor (NC) connector from the
transaxle.
(b) Measure the resistance between terminals of speed sen-
sor.
OK:
Resistance:
TOYOTA made: 500 to 620
at 20
C (68
F)
AISIN made: 560 to 680
at 20
C (68
F)
NG REPLACE SPEED SENSOR(NC)
OK
2 CHECK HARNESS AND CONNECTOR(SPEED SENSOR ± ECM)
(a) Connect the speed sensor (NC) connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance between terminals NC+ and NC±
of the ECM connector.
OK:
Resistance:
TOYOTA made: 500 to 620
at 20
C (68
F)
AISIN made: 560 to 680
at 20
C (68
F)
(d) Measure the resistance between body ground and that
NC+ as well as NC± of the ECM connector.
OK:
Resistance: 1M
or higher
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
CHECK AND REPLACE ECM

05±886± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0748/62 PRESSURE CONTROL SOLENOID ºAº
ELECTRICAL (SHIFT SOLENOID VALVE
SL1)
DTC P0778/63 PRESSURE CONTROL SOLENOID ºBº
ELECTRICAL (SHIFT SOLENOID VALVE
SL2)
DTC P0982/65 SHIFT SOLENOID ºDº CONTROL CIRCUIT
LOW (SHIFT SOLENOID VALVE S4)
DTC P0983/65 SHIFT SOLENOID ºDº CONTROL CIRCUIT
HIGH (SHIFT SOLENOID VALVE S4)
CIRCUIT DESCRIPTION
Shifting from 1st to O/D is performed in combination with ON and OFF operation of the shift solenoid valves
SL1 and SL2 which are 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
P0748/62
ECM checks for an open or short circuit in shift solenoid valves
SL1 (1±trip detection logic)
(a) When solenoid is energized, duty ratio exceeds 75%
(b) When solenoid is not energized, duty ratio is less than 3%
Open or short in shift solenoid valve SL1 circuit

Shift solenoid valve SL1

ECM
P0778/63
ECM checks for an open or short circuit in shift solenoid valves
SL2 (1±trip detection logic)
(a) When solenoid is energized, duty ratio exceeds 75%
(b) When solenoid is not energized, duty ratio is less than 3%
Open or short in shift solenoid valve SL2 circuit

Shift solenoid valve SL2

ECM
P0982/65ECM detects short in solenoid valve S4 circuit 4 times when
solenoid valve S4 is operated (1±trip detection logic)
Short in shift solenoid valve S4 circuit

Shift solenoid valve S4

ECM
P0983/65ECM detects open in solenoid valve S4 circuit 4 times when
solenoid valve S4 is not operated (1±trip detection logic)
Open in shift solenoid valve S4 circuit

Shift solenoid valve S4

ECM
HINT:
Check the shift solenoid valve SL1 when DTC P0748/62 is output, check the shift solenoid valve SL2 when
DTC P0778/63 is output and check the shift solenoid valve S4 when DTC P0982/65 and P0983/65 is output.
05C8V±01