ECT ECU monitors transaxle operation and contains a self-diagnostic system
which stores trouble codes if transaxle electronic control
system failure or problem exists. If a problem exists in No. 1 or
No. 2 solenoids or speed sensors and trouble code is set, ECT ECU blinks
OD OFF light on instrument panel to warn driver.
OD
OFF light will not blink to warn driver if a problem exists
or trouble code is stored for lock-up solenoid, or problem exists
with brakelight switch or throttle position sensor signal.
1) Turn ignition on. DO NOT start engine. Depress OD switch to the ON position.
NOTE: Trouble codes can only be retrieved with OD switch in the ON position. If OD switch is in OFF position, OD OFF light will be on continuously and will not blink the trouble code.
2) Install jumper wire between terminals TE1 and E1 of data link connector.
3) Note number of flashes from OD OFF light on instrument panel. If normal system operation exists, OD OFF light will blink 2 times per
second.
NOTE:
a) In Pickup
& 4Runner need connect terminal
G
to Ground.
b) A stuck solenoid will not set a trouble code. Trouble codes are only set for circuit malfunctions, not mechanical
failures.
4) If system is operating correctly (normally) and no
trouble code exists, turn ignition off and remove the jumper wire. Perform the MANUAL SHIFTING TEST under TRANSMISSION SHIFT TESTING to determine if
problem is electrical or mechanical. Check system by the symptom.
5) If trouble code exists, OD OFF light will flash once every second. The number of flashes will equal first digit of trouble code. After a pause of 1.5 seconds, second digit will be displayed.
6) If more than one trouble code exists, next trouble code will be displayed after pause of 2.5 seconds. Smallest value trouble code will be first. Trouble codes will be repeated.
7) Once trouble code is obtained, determine probable cause and symptom.
Turn ignition off and remove jumper wire.
NOTE: Once repairs have been performed, trouble codes must be cleared from ECT ECU memory.
Reading Diagnostic Codes (Cressida & Supra W/Super Monitor Display)
CAUTION: DO NOT depress accelerator pedal while checking codes with Super Monitor Display. Depressing of accelerator pedal will cancel the display.
1) Turn ignition on with engine off. Simultaneously push and hold the SELECT and INPUT M keys for at least 3 seconds.
2) After a short time, hold the SET key for at least 3
seconds. If system is operating correctly, ECT OK will appear on the screen. If a malfunction exists, the code number will be displayed on the screen.
3) If 2 or more codes are stored, a 5 second pause will occur between the codes. If codes are stored, note code number and repair appropriate circuit. See appropriate DIAGNOSTIC CODES table. It diagnostic codes 62, 63, 64 or 65 occur, an electrical failure in she solenoids is indicated. Mechanical failures such as sticking switches will not appear as diagnostic codes.
4) Once diagnostic code is confirmed, turn ignition off or push DISPLAY key to obtain time reading on the screen.
DIAGNOSTIC
CODES (EXCEPT A-341E) TABLE
42 Defective No. 1 speed sensor- Severed wire harness or short circuit. Fault ECU.
44 Defective rear wheel speed sensor (in transfer left case). Severed wire harness or short circuit.
61 Defective No. 2 speed sensor. Severed wire harness or short circuit. Faulty ECU.
62 Defective No. 1 solenoid. Severed wire harness or short circuit. Faulty ECU.
63 Defective No. 2 solenoid. Severed wire harness or short circuit. Faulty ECU.
64 Defective lock-up solenoid. Severed wire harness or short circuit.
65 Defective No. 4 solenoid. Severed wire harness or short circuit.
DIAGNOSTIC CODES (A-341E) TABLE
42 The No. 2
speed sensor signal is input, but No. 1 speed sensor
signal is not input while vehicle is being driven in a shift range other
than the N range.
46 Current
does not flow to the No. 4 solenoid circuit for a set period of time or
longer when the ECU output duty ratio to the No. 4 solenoid is 90% or higher.
61
The No.1 speed sensor signal is input, but No. 2 speed sensor signal is not
input while vehicle is being driven
in a shift range other than the N range.
62, 63 Solenoid resistance is 8 ohms or lower when solenoid is energized.
Solenoid resistance is 100k ohms or higher when solenoid is not energized.
64 Current does not flow to the No. 3 solenoid circuit for a set period of
time or longer when the ECU output duty ratio to the No. 3 solenoid is 90%
or higher.
67 When NO
signal (output shaft RPM)
is above 1000 RPM. NCO signal (input shaft RPM) is below 500 RPM.
68
The kickdown switch is turned on before the accelerator pedal starts pushing
in the switch.
CANCELING
DIAGNOSTIC CODES (ALL MODELS)
1)
After repairing the electrical fault all diagnostic codes must be cleared
from the ECU. Cancel the codes by removing the correct fuse for 10 seconds
or more with the engine OFF See FUSE APPLICATION table. Fuse may have to be
removed for longer period of time depending on ambient temperature.
FUSE
APPLICATION TABLE
Application
Fuse
Block Marking Fuse Amp
Cressida
A-340A
EFI
20
Lexus
LS 400 A-341E
EFI
20
Pickup
& 4Runner:
A-340E,
A-340F & A-340H
EFI
15
Supra
A-340E
DOME
20
2)
Diagnostic codes can also be canceled by disconnecting negative battery
cable. In this case all memory systems such as the clock, radio and computer
control system will also be lost. Diagnostic codes can also be canceled by
disconnecting the ECU.
3)
If diagnostic codes are not canceled, they will be retained and appear with
other codes in the event of further malfunctions.
P-codes
. DTC P0500 - Vehicle Speed Sensor Malfunction
. DTC P0750 - Shift Solenoid "A" Malfunction
. DTC P0753 - Shift Solenoid "A" Electrical Malfunction
. DTC P0755 - Shift Solenoid "B" Malfunction
. DTC P0758 - Shift Solenoid "B" Electrical Malfunction
. DTC P0770 - Shift Solenoid "E" (SL) Malfunction
. DTC P0773 - Shift Solenoid "E" (SL) Electrical Malfunction
. DTC P1520 - Stop Light Switch Signal Malfunction
. DTC P1705 - Direct Clutch Speed Sensor Circuit Malfunction
. DTC P1765 - Shift Solenoid Valve SLN Circuit Malfunction
. DTC P1780 - Park/Neutral Position Switch Malfunction
Note:
Not all trouble codes are used on all models
После включения
зажигания необходимо перевести
переключатель “
DTC
Check.
Present
Troubles Codes.
1)
Turn the ignition switch to ACC or ON position and wait approx. 20 seconds.
2)
Using SST (or suitable wire), connect terminals Tc and E1 of the DLC No.1 or the
other "type" connectors
Past
Troubles Codes.
1)
Using SST (or suitable wire), connect terminals Tc and E1 of the DLC No.1
2)
Turn the ignition switch to ACC or ON position and wait approx. 20 seconds.
После включения
положения замка зажигания “Acc”
или “Ign”
и паузы не менее 20...30 секунд, необходимо
соединить контакты “Tc”
и “E1”. По
количеству вспышек лампы “AirBag” и длительности
пауз между ними определяют код(ы)
неисправности (Read the 2-digit DTC as indicated by the number
of times the SRS
warning light blinks). Здесь
коды ранних моделей.
Коды самодиагностики для авто выпуска
после 1997 года опубликованы.
Очистка кодов самодиагностики (Clear DTC, e.g. by "old" Engine Check
Connectro)
Примечание: Это изложение
Руководства по ремонту Toyota не
предназначено для того, чтобы быть
заменой фактических публикаций (The
original Toyota
Repair Manuals RM179U1 и RM179U2).
Рекомендуется любому владельцу получить
(приобрести) оригинал Руководства по
ремонту (RM179U1 и RM179U2) в любом региональном
Представительстве Toyota или Центре
обслуживания или в Toyota
Motor Corporation
(a)
Соедините контакты «Tc»
и «AB» диагностического разъема с
проводами соответствующей длины.
(b)
Поверните замок зажигания в положение «ACC»
или «IGN»,
сделайте паузу не менее 6 секунд.
(с) Начиная с контакта «Tc»,
присоедините поочередно
контакты «Tc»
и «AB»
с корпусом («минусом») с периодом 1.0 ± 0.5
секунды дважды. После этого сохраните
соединение контакта «Tc»
с минусом.
Примечание: При чередовании
присоединений с корпусом (кузовом)
контактов «Tc»
и «АВ» отсоединяйте один при уже
замкнутом другом контакте. Интервал
времени между замыканиями должен быть в
пределах указанных на рисунке.
(d) Через нескольких секунд, когда
индикатор «Airbag» "заморгает", очистка
памяти кодов самодиагностики закончена. HTH!
Примечания:
** Для автомобилей, выпущенных после 1995 г.
и оборудованных OBDII, методика считывания
и очистки памяти кодов самодиагностики
практически не отличается, хотя
отличаются коды и номера контактов.
Методика и
коды самодиагностики Suspension.
Методика считывания кодов ABS.