Page 569 of 2543

The No.3 solenoid valve is provided for lock±up operations. The
lock±up operation pressure is controlled by the linear solenoid for
smooth engagement.
The amount of current flow to the solenoid is controlled by the duty
ratio (See page AT2±75) of ECM output signal. The higher the duty
ratio becomes, the higher the lock±up hydraulic pressure becomes
during the lock±up operation. If the malfunction occurs in this cir-
cuit and diagnostic trouble code 64 is stored in memory, but the
O/D OFF indicator light does not blink.
Diagnostic Code Detection ConditionDTC No.Trouble Area
64
No.3 solenoid valve
Harness or connector between No.3
solenoid valve and ECM
ECMAll conditions below are detected for 1 sec. or
more. (2 trips detection logic)*
(a) ECM outputs duty signal to No.3 solenoid in
90% or higher duty ratio.
(b) Current to No.3 solenoid:
450 + 100 mA or less.
*: See page AT2±58
Waveform between terminals SLN±
and E1 when engine is idling.
Waveform between terminals SLN±
and E1 during shift change.
CIRCUIT DESCRIPTION
DTC 64 No. 3 Solenoid Valve Circuit (For Lock±up Control Pressure
Modulation)
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTINGAT2±85
Page 570 of 2543
WIRING DIAGRAM
AT2±86± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING
Page 571 of 2543

Check No.3 solenoid valve.
1. Jack up the vehicle.
2. Remove the oil pan.
3. Disconnect the solenoid connector
Measure resistance between terminal 1 and 2 of
the solenoid connector.
Resistance: 3.5 Ð 3.9
Check solenoid resistance
Check solenoid operation
Connect positive lead with an 8 Ð 10 W bulb to
terminal 1 of solenoid connector and negative
lead to terminal 2, then check the movement of the
valve.
When battery positive
voltage is applied.
direction in illustration
at left.
When battery positive
voltage is cut off.
Valve moves in
Valve moves in
direction in illustration
at left.
Replace No.3 solenoid valve.
Check solenoid's operation
1. Prepare a variable power supply.
2. Connect positive lead of the variable power
supply to terminal 1 of solenoid connector and
negative lead to terminal 2.
3. Check the movement of the valve when the
voltage is gradually increased. (A current
greater than 1A should not be supplied.)
As the voltage is increased, the valve should move
slowly in the direction.
4. Check the movement of the valve when the volt±
age is cut off.
The valve should return in the direction.
Go to step
INSPECTION PROCEDURE
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTINGAT2±87
Page 572 of 2543
Check harness and connector between battery and No.3 solenoid valve, No.3
solenoid valve and ECM (See page IN±30).
Repair or replace harness or connector.
Proceed to next circuit inspection shown on matrix
chart (See page AT2±64). However, when diagnostic
trouble code 64 is displayed, check and replace
ECM.
AT2±88± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING
Page 573 of 2543

DTC No.Trouble Area
67
O/D direct clutch speed sensor
Harness or connector between O/D direct
clutch speed sensor and ECM
ECMAll conditions below are detected for 4 secs. or
more.
(2 trips detection logic)*
(a) Gear position: 1st, 2nd or 3rd
(b) T/M input shaft rpm: 1000 rpm or more
(c) T/M output shaft rpm: Less than 300 rpm
(d) NSW OFF (other than P or N position)
Diagnostic Trouble Code Detection Condition
*: See page AT2±58
Waveform between terminals NCO+ and NCO± during engine idling.
This sensor detects the rotation speed of the O/D input shaft
from the rotation of the O/D direct clutch drum.
Its construction is the same as that of the No.2 vehicle speed
sensor (See page AT2±79).
By comparing the O/D direct clutch speed signal and the No.2
vehicle speed sensor signal, the ECM detects the shift timing
of the gears and appropriately controls the engine torque and
hydraulic pressure in response to various conditions, thus
performing smooth gear shift.O/D Direct Clutch Drum
O/D Direct Clutch
Speed Sensor
CIRCUIT DESCRIPTION
DTC 67 O D Direct Clutch Speed Sensor Circuit
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTINGAT2±89
Page 574 of 2543
WIRING DIAGRAM
INSPECTION PROCEDURE
Check resistance between terminals NCO+ and NCO± of ECM.
Connect the Check Harness A to the ECM (See
page EG±510).
Check Resistance between terminals NCO
+ and
NCO± of ECM.
Resistance: 560 Ð 680
Proceed to next circuit inspection shown on ma-
trix chart (See page AT2±64). However, when diag-
nostic trouble code 67 is displayed, check and re-
place ECM.
G to AT2±90
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING
Page 575 of 2543
Check O/D direct clutch speed sensor.
Remove the O/D direct clutch speed sensor from
the transmission (See page AT2±17).
Measure resistance between the terminals 1 and 2
of the O/D direct clutch speed sensor.
Resistance: 560 Ð 680
Check and repair harness and connector between
ECM and O/D direct clutch speed sensor (See page
IN±30).
Check the speed sensor function
Check voltage between the terminals 1 and 2 of
the speed sensor when a magnet is put close to
the front end of the speed sensor then taken away
quickly.
Voltage is generated intermittently.
The voltage generated is extremely low.
Replace O/D direct clutch speed sensor.
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTINGAT2±91
Page 576 of 2543

DTC 77 No.5 Solenoid Valve Circuit (For Line Pressure Modulation)
CIRCUIT DESCRIPTION
The throttle pressure that is applied to the primary regulator valve (which modulates line pressure) causes the
No.5 solenoid valve, under electronic control, to precisely and minutely modulate and generate line pressure
according to the accelerator pedal effort, or engine power output detected. This reduces the fluctuation of line
pressure and provides smooth shifting characteristics.
Upon receiving the throttle valve opening angle signal, ECM controls the line pressure by sending a predeter-
mined duty ratio to the No.5 solenoid valve located in the valve body, activating the solenoid valve, modulating
the line pressure, generating throttle pressure.
DTC No. Diagnostic Trouble Code Detection Condition Trouble Area
77
Any of condition below are detected. (2 trip
detection logic)
SLT
± terminal: 0 V or 5 V for 1 sec. or more.
No.5 solenoid valve
Harness or connector between No.5
solenoid valve and ECM
ECM
AT2±92± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING