2005 TOYOTA AVENSIS Circuit

C54864
THOE2
05±900±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U241E(1AZ±FE))
AVENSIS REPAIR MANUAL (RM1018E)
TRANSMISSION FLUID TEMPERATURE SENSOR NO.2 CIRCUIT
CIRCUIT DESCRIPTION
The ATF temperature sensor converts the fluid temperature into a resistance v\
alue which is input into the
ECM.
WIRING DIAGRAM
See page 05±882.
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
05C8Z±01

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

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

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

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

NORMAL
S4
SL1SL2 Solenoid Valve
Gear
ON
OFFONOFF
ON
OFF
OFF OFF
OFFON1st
2nd
3rd
O/DSHIFT SOLENOID SL1
MALFUNCTIONING
S4
SL1 SL2Solenoid Valve
Gear
X
X
X
XON
ON
OFF
ON
OFF
ONOFF
OFF
OFF
ON
ON2nd
2nd
3rd
3rdS4 SL1SL2 Solenoid Valve
Gear SHIFT SOLENOID SL2
MALFUNCTIONING
ON X
X
X
X ON
OFF
OFFOFF
OFF
OFF3rd
3rd
3rd
O/D
S4 SL1SL2 Solenoid Valve
Gear
SHIFT SOLENOID S4
MALFUNCTIONING
X
X
X
X ON ON
OFF ON
OFF
OFF1st
2nd
3rd
3rd
S4 SL1 SL2Solenoid Valve
Gear
SHIFT SOLENOID SL1
AND SL2
MALFUNCTIONING
X
X
X
XX
X
X
X3rd
3rd
3rd
O/D OFF
OFF
OFF
ONSHIFT SOLENOID SL1
AND S4
MALFUNCTIONING
S4
SL1 SL2Solenoid Valve
Gear
X
X
X
XX
X
X
X ON
ON
OFF
ON
OFF
ON2nd
2nd
2nd
2ndS4 SL1SL2 Solenoid Valve
Gear
X
X
X
X
S4 SL1 SL2Solenoid Valve
Gear SHIFT SOLENOID SL1,
SL2 AND S4
MALFUNCTIONING
X
X
X
XX
X
X
X3rd
3rd
3rd SHIFT SOLENOID SL2
AND S4
MALFUNCTIONING
X
X
X
XX
X
X
X
3rd ON
OFF
OFF3rd
3rd
3rd
3rd OFF
OFFOFF
OFF
OFF
OFF OFF
OFF
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))05±887
AVENSIS REPAIR MANUAL (RM1018E)
Fail safe function:
If either of the shift solenoid valve circuits develops an open or short, the ECM turns the other shift solenoid
ON and OFF in order to shift into the gear positions shown in the table below. The ECM also turns the shift
solenoid valve SL OFF at the same time. If both solenoids malfunction, hydraulic control cannot be per-
formed electronically, and so it must be done manually.
Manual shifting as shown in the following table must be done (In case of a short circuit, the ECM stops send-
ing the current to the short circuit solenoid).

05±956± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FSE))
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0748 PRESSURE CONTROL SOLENOID ºAº
ELECTRICAL (SHIFT SOLENOID VALVE
SL1)
DTC P0778 PRESSURE CONTROL SOLENOID ºBº
ELECTRICAL (SHIFT SOLENOID VALVE
SL2)
DTC P0982 SHIFT SOLENOID ºDº CONTROL CIRCUIT
LOW (SHIFT SOLENOID VALVE S4)
DTC P0983 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
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
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
P0982ECM detects short in solenoid valve No. 4 circuit 4 times when
solenoid valve No. 4 is operated (1±trip detection logic)
Short in shift solenoid valve S4 circuit

Shift solenoid valve S4

ECM
P0983ECM detects open in solenoid valve No. 4 circuit 4 times when
solenoid valve No. 4 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 is output, check the shift solenoid valve SL2 when DTC
P0778 is output and check the shift solenoid valve S4 when DTC P0982 and P0983 is output.
05C9E±01

NORMAL
S4
SL1SL2 Solenoid Valve
Gear
ON
OFFONOFF
ON
OFF
OFF OFF
OFFON1st
2nd
3rd
O/DSHIFT SOLENOID SL1
MALFUNCTIONING
S4
SL1 SL2Solenoid Valve
Gear
X
X
X
XON
ON
OFF
ON
OFF
ONOFF
OFF
OFF
ON
ON2nd
2nd
3rd
3rdS4 SL1SL2 Solenoid Valve
Gear SHIFT SOLENOID SL2
MALFUNCTIONING
ON X
X
X
X ON
OFF
OFFOFF
OFF
OFF3rd
3rd
3rd
O/D
S4 SL1SL2 Solenoid Valve
Gear
SHIFT SOLENOID S4
MALFUNCTIONING
X
X
X
X ON ON
OFF ON
OFF
OFF1st
2nd
3rd
3rd
S4 SL1 SL2Solenoid Valve
Gear
SHIFT SOLENOID SL1
AND SL2
MALFUNCTIONING
X
X
X
XX
X
X
X3rd
3rd
3rd
O/D OFF
OFF
OFF
ONSHIFT SOLENOID SL1
AND S4
MALFUNCTIONING
S4
SL1 SL2Solenoid Valve
Gear
X
X
X
XX
X
X
X ON
ON
OFF
ON
OFF
ON2nd
2nd
2nd
2ndS4 SL1SL2 Solenoid Valve
Gear
X
X
X
X
S4 SL1 SL2Solenoid Valve
Gear SHIFT SOLENOID SL1,
SL2 AND S4
MALFUNCTIONING
X
X
X
XX
X
X
X3rd
3rd
3rd SHIFT SOLENOID SL2
AND S4
MALFUNCTIONING
X
X
X
XX
X
X
X
3rd ON
OFF
OFF3rd
3rd
3rd
3rd OFF
OFFOFF
OFF
OFF
OFF OFF
OFF
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FSE))05±957
AVENSIS REPAIR MANUAL (RM1018E)
Fail safe function:
If either of the shift solenoid valve circuits develops an open or short, the ECM turns the other shift solenoid
ON and OFF in order to shift into the gear positions shown in the table below. The ECM also turns the shift
solenoid valve SL OFF at the same time. If both solenoids malfunction, hydraulic control cannot be per-
formed electronically, and so it must be done manually.
Manual shifting as shown in the following table must be done (In case of a short circuit, the ECM stops send-
ing the current to the short circuit solenoid).