2005 TOYOTA AVENSIS Circuit

D30684
KD
D02350
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FSE))05±971
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1 INSPECT TERMINAL VOLTAGE
(a) Turn the ignition switch to ON.
(b) Measure the voltage between terminal KD of ECM and
body ground when accelerator pedal is fully depressed or
not.
OK:
Accelerator pedalVoltage
Fully depressed
(Kick±down switch is ON)Below 1 V
Released
(Kick±down switch is OFF)10 to 14 V
OK PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN ON PROBLEM SYMPTOMS TABLE
NG
2 INSPECT KICK DOWN SWITCH
(a) Disconnect the kick±down switch connector.
(b) Check the continuity between terminals 1 and 2 of the
kick±down switch when kick±down switch is ON and OFF.
OK:
Kick±down switchContinuity
ONContinuity
OFFNo continuity
NG REPLACE KICK DOWN SWITCH
OK
3 CHECK HARNESS AND CONNECTOR
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
CHECK AND REPLACE ECM

D02290
Line Pressure
Control Pressure
Current Flow to Solenoid
BE4056
ON
OFF
1 cycle
D26542
E1
ECT SolenoidECM
13
SLT+ E12 P±L
2 O
12
SLT± E12 P
7 SLT+
SLT± G
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FSE))05±967
AVENSIS REPAIR MANUAL (RM1018E)
DTC P2716 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
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
WIRING DIAGRAM
05C9I±01

D26541
C3
Counter Gear Speed
SensorECM
26
E12 NC+ LG
2
34
E12 NC± LG±B 1
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FSE))05±965
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0793 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
ECM detects conditions (a), (b), (c) and (d) continuity for 5 sec.
or more: (1 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
05C9H±01

D26539
E1
ECT Solenoid
V
7L19
E12SBECM
SB 05±1030
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)
AVENSIS REPAIR MANUAL (RM1018E)
DTC P1798 SB SOLENOID CIRCUIT MALFUNCTION
(SHIFT SOLENOID VALVE SB)
CIRCUIT DESCRIPTION
Shift solenoid valve SB controls the 2nd brake (B1) and 1st and reverse brake pressures and performs the
1st and 2nd engine brake control.
Fail safe function:

S shift control prohibition.

On activating the fail±safe function during S shift, the driving mode turns to the ordinal D range.
DTC No.DTC Detection ConditionTrouble Area
P1798
ECM memorizes DTC P1798 if (a) or (b) condition below is
detected once or more.
(a) Solenoid resistance is 30
or lower (short circuit) when
solenoid is energized.
(b) Solenoid resistance is 100 k
or higher (open circuit) when
solenoid is not energized.

Open or short in shift solenoid valve SB circuit

Shift solenoid valve SB

ECM
WIRING DIAGRAM
05C8N±01

D26539
E1
ECT Solenoid
Y
2R±B12
E12
STECM
ST
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)05±1027
AVENSIS REPAIR MANUAL (RM1018E)
DTC P1790 ST SOLENOID CIRCUIT MALFUNCTION
CIRCUIT DESCRIPTION
Shift solenoid valve ST is switched ON±OFF by a signal from ECM so that let in or out timing of O/D and
2nd brake is adjusted by operating orifice control valve. Therefore, shift solenoid valve ST operates when
letting in or out reverse clutch.
If it is broken, the shift shock becomes big.
DTC No.DTC Detection ConditionTrouble Area
P1790
ECM memorizes DTC P1790 if (a) or (b) condition below is
detected once or more.
(a) Solenoid resistance is 30
or lower (short circuit) when
solenoid is energized.
(b) Solenoid resistance is 100 k
or higher (open circuit) when
solenoid is not energized.

Open or short in shift solenoid valve ST circuit

Shift solenoid valve ST

ECM
WIRING DIAGRAM
05C8M±01

05±1024± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)
AVENSIS REPAIR MANUAL (RM1018E)
DTC P1780 PARK/NEUTRAL POSITION SWITCH
MALFUNCTION
CIRCUIT DESCRIPTION
The park/neutral position switch detects the shift lever position and sends the signals to the ECM.
DTC No.DTC Detecting ConditionTrouble Area
DTC is detected for 500 msec. or more (2±trip detection logic).

2 or more switches are ON simultaneously for P, R, N and D
position.
Sh t i k/ t l iti it h i it
P1780When any of following conditions for 500 msec. or more in the
S position (2±trip detection logic).
(a) P position input signal is ON.
(b) N position input signal is ON.
(c) R position input signal is ON.
Short in park/neutral position switch circuit

Park/neutral position switch assy

ECM
0568L±06

D02290
Line Pressure
Control Pressure
Current Flow to Solenoid
BE4056
ON
OFF
1 cycle
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)05±1021
AVENSIS REPAIR MANUAL (RM1018E)
DTC P1760 LINEAR SOLENOID FOR LINE PRESSURE
CONTROL CIRCUIT MALFUNCTION
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 the extent
of the accelerator pedal depressed or the output of engine pow-
er.
This reduces the function of 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
P1760
Condition (a) or (b) below is detected 1 sec. or more:
(a) SLT±
terminal: 0 V
(b) SLT±
terminal: 12 V

Open or short in shift solenoid valve SLT circuit

Shift solenoid valve SLT

ECM
05C8L±01

D26540
ECM
NT+
NT± E12
35 B±O
B 2 1T4
Turbine Speed
Sensor
E1227
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)05±1019
AVENSIS REPAIR MANUAL (RM1018E)
DTC P1725 NT REVOLUTION SENSOR CIRCUIT
MALFUNCTION
CIRCUIT DESCRIPTION
This sensor detects the rotation speed of the input turbine. By comparing the input turbine speed signal (NT)
with the vehicle speed sensor signal, the ECM detects the shift timing of the gears and appropriately controls
the engine torque and hydraulic pressure according to various conditions. Thus smooth gear shifting is per-
formed.
DTC No.DTC Detection ConditionTrouble Area
P1725
ECM detects conditions (a), (b), (c) and (d) continuity for 5 sec.
or more: (1 ± 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) NT < 300 rpm

Open or short in speed sensor (NT) circuit

Speed sensor (NT)

ECM
WIRING DIAGRAM
057ZG±05