2005 TOYOTA AVENSIS Circuit

G31165
E1
Electronically Controlled
Transmission SolenoidECM
8
E12 SB
7
V
L
SB +B
CPU
–
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)05–283
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
DTC P0998 SHIFT SOLENOID ”F” CONTROL CIRCUIT
LOW (SHIFT SOLENOID VALVE SB)
DTC P0999 SHIFT SOLENOID ”F” CONTROL CIRCUIT HIGH (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 normal D position.
DTC No.DTC Detection ConditionTrouble Area
P0998ECM detects short in solenoid valve SB circuit 2 times when
solenoid valve SB is operated (1–trip detection logic)
Short in shift solenoid valve SB circuit

Shift solenoid valve SB

ECM
P0999ECM detects open in solenoid valve SB circuit 2 times when
solenoid valve SB is not operated (1–trip detection logic)
Open in shift solenoid valve SB circuit

Shift solenoid valve SB

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
05L2M–01

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

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

G30849
Instrument Panel J/B
S6
Stop Light SW
Engine Room R/BECM
STP
E1019
G–W 7
ID1
B–R 2C
2N 2ASTOP 110 2
22 IJ1
IJ112
21
G–B
B–R
FL MAIN
Battery11
12ALTG–W G–W
2A G–W
G–B
– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)05–261
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
DTC P0724 BRAKE SWITCH ”B” CIRCUIT HIGH
CIRCUIT DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling while driving in lock–up condition, when
brakes are suddenly applied.
When the brake pedal is depressed, this switch sends a signals to the ECM. Then the ECM cancels the op-
eration of the lock–up clutch while braking is in progress.
DTC No.DTC Detecting ConditionTrouble Area
P0724
The stop light switch remains ON even when the vehicle is
driven in a GO (30 km/h) and STOP (3 km/h) fashion 10 times.
(2–trip detection logic).
Short in stop light switch signal circuit

Stop light switch

ECM
MONITOR DESCRIPTION
This DTC indicates that the stop light switch remains on. When the stop light switch remains ON during ”stop
and go” driving, the ECM interprets this as a fault in the stop light switch and the MIL comes on and the ECM
stores the DTC. The vehicle must stop (less than 3 km/h (2 mph)) and go (30 km/h (19 mph) or more) ten
times for two driving cycles in order to detect malfunction.
WIRING DIAGRAM
05KB2–02


C42920C53419
5 V/DIV
0.5 ms/DIV
G31763
ECM
NT+
NT– 26
34 B–O
B 2 1E12
E12 T4
Turbine Speed Sensor
5V
E1 05–258
– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
DTC P0717 TURBINE SPEED SENSOR CIRCUIT NO
SIGNAL
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, providing smooth gear shift.
DTC No.DTC Detection ConditionTrouble Area
P0717
ECM detects conditions (a), (b) and (c) continuity for 5 sec. or
more: (1–trip detection logic)
(a) Vehicle speed: 50 km/h (31 mph) or more
(b) Park/neutral position switch (NSW, R and L) is OFF
(c) Speed sensor (NT): less than 300 rpm
Open or short in transmission revolution sensor NT (speed
sensor NT) circuit

Transmission revolution sensor NT (speed sensor NT)

ECM
Reference (Using an oscilloscope):
Check the waveform between the terminals NT+ and NT–
of the ECM connector.
Standard: Refer to the illustration.
TerminalNT+ – NT–
Tool setting5V/DIV, 0.5ms/DIV
Vehicle conditionVehicle speed 20 km/h (12 mph)
MONITOR DESCRIPTION
The input speed sensor detects the transmission input shaft speed. The ECM determines the gear shift tim-
ing based on a comparison of the input speed sensor (input shaft speed) with the output speed sensor (out-
put shaft speed).
When the output shaft speed is higher then the expected value and the input shaft speed is 300 rpm or less
while running with the shift in the D position, the ECM will conclude that there is malfunction of the input tur-
bine speed sensor (NT). The ECM will illuminate the MIL.
WIRING DIAGRAM
05KB1–02

05–252– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
DTC P0710 TRANSMISSION FLUID TEMPERATURE
SENSOR ”A” CIRCUIT
DTC P0712 TRANSMISSION FLUID TEMPERATURE
SENSOR ”A” CIRCUIT LOW INPUT
DTC P0713 TRANSMISSION FLUID TEMPERATURE
SENSOR ”A” CIRCUIT HIGH INPUT
CIRCUIT DESCRIPTION
The ATF (Automatic Transmission Fluid) temperature sensor converts the fluid temperature into a resistance
value which is input into the ECM.
The ECM applies a voltage to the temperature sensor through ECM terminal THO.
The sensor resistance changes with the transmission fluid temperature. As the temperature becomes high-
er, the sensor resistance decreases.
One terminal of the sensor is grounded so that the sensor resistance decreases and the voltage goes down
as the temperature becomes higher.
The ECM calculates the fluid temperature based on the voltage signal.
DTC No.DTC Detection ConditionTrouble Area
P0710
(a) and (b) is detected momentary within 0.5 sec. when neither
P0712 or P0713 is not detected (1–trip detection logic)
(a) ATF temperature sensor resistance is less than 79 Ω.
(b) ATF temperature sensor resistance is more than 156 kΩ.
HINT:
Within 0.5 sec., the malfunction switches from (a) to (b) or from
(b) to (a)

Open or short in ATF temperature sensor circuit

Transmission wire (ATF temperature sensor)

ECM
P0712ATF temperature sensor resistance is less than 79 Ω for 0.5
sec. or more (1–trip detection logic)
Short in ATF temperature sensor circuit

Transmission wire (ATF temperature sensor)

ECM
P0713
ATF temperature sensor resistance is more than 156 kΩ when
15 minutes or more after the engine start
DTC is detected for 0.5 sec. or more (1–trip detection logic)
Open in ATF temperature sensor circuit

Transmission wire (ATF temperature sensor)

ECM
MONITOR DESCRIPTION
The automatic transmission fluid (ATF) temperature sensor converts ATF temperature to an electrical resis-
tance value. Based on the resistance, the ECM determines the ATF temperature, and the ECM detects an
opens or shorts in the ATF temperature circuit. If the resistance value of the ATF temperature is less than
79 Ω
*1 or more than 156 kΩ*2, the ECM interprets this as a fault in the ATF sensor or wiring. The ECM will
turn on the MIL and store the DTC.
*1: 150C (302F) or more is indicated regardless of the actual ATF temperature.
*2: –40C (–40F) is indicated regardless of the actual ATF temperature.
HINT:
The ATF temperature can be checked on the Intelligent Tester II display.
05CVQ–06

G31390
THO
E2 BRE12
28 32
6 E1
Electronically Controlled
Transmission Solenoid
E13 O
1
OVECM
E2OT
– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)05–253
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Using the Intelligent Tester II Data List allows switch, sensor, actuator and other item values to be read with-
out removing any parts. Reading the Data List early in troubleshooting is one way to shorten labor time.
NOTICE:
In the table below, the values listed under ”Normal Condition” are reference values. Do not depend
solely on these reference values when deciding whether a part is faulty or not.
(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) Select the item ”Enter / Power train / Engine and ECT / Data List”.
(g) Follow the instructions on the tester and read the Data List.
ItemMeasurement Item/
Range (display)Normal Condition
A/T Oil Temperature 1
ATF Temp. Sensor Value/
min.: –40C (–40F)
max.: 215C (419F)
After Stall Test;
Approx. 80C (176F)

Equal to ambient temperature when cold soak
HINT:
When DTC P0712 is output and Intelligent Tester II output is 150C (302F) or more, there is a short circuit.
When DTC P0713 is output and Intelligent Tester II output is –40C (–40F), there is an open circuit.
Measure the resistance between terminal THO (OT) and body ground.
Temperature DisplayedMalfunction
–40
C (–40
F)Open circuit
150
 (302
  Short circuit
HINT:
If a circuit related to the ATF temperature sensor becomes open, P0713 is immediately set (in 0.5 second).
When P0713 is set, P0711 cannot be detected.
It is not necessary to inspect the circuit when P0711 is set.

–
DIAGNOSTICS CRUISE CONTROL SYSTEM (2AZ–FSE)(From
February, 2004)05–327
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
CRUISE MAIN INDICATOR LIGHT CIRCUIT
CIRCUIT DESCRIPTION
The ECM detects a cruise control switch signal and sends it to the combination m\
eter via BEAN. Then
the CRUISE main indicator light comes on.
The CRUISE main indicator light circuit uses BEAN for communication. If there are any ma\
lfunctions
in this circuit, check for DTCs in the multiplex communication system.
INSPECTION PROCEDURE
1 READ VALUE ON INTELLIGENT TESTER II
(a) Connect the intelligent tester II to the DLC3.
(b) Turn the ignition switch to the ON position and turn the intelligent test\
er II main switch on.
(c) Select the item below in the ”DATA LIST”, and read the display on the intelligent tester II.
CC (ECM):
ItemMeasurement Item /
Display (Range)Normal ConditionDiagnostic Note
CCS Indicator M–CPUCruise indicator signal (Main CPU) / ON or OFFON : ”CRUISE” ON
OFF : ”CRUISE” OFF–
CCS Indicator S–CPUCruise indicator signal (Sub CPU) / ON or OFFON : ”CRUISE” ON
OFF : ”CRUISE” OFF–
OK:
When the cruise control main switch is operated, the display changes as show\
n above.
NG REPLACE ECM(SEE PUB. NO. RM1045E, PAGE 10–29)
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMP TOMS TABLE
( SEE PAGE 05–316 )
05KYG–01