Page 577 of 2543

INSPECTION PROCEDURE
Check No.5 solenoid valve.
1. Jack up the vehicle.
2. Remove the oil pan.
Resistance: 3.6 Ð 4.0
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.direction in illustration
at left.
Replace No.5 solenoid valve.
Check solenoid operation
Go to step
1. Disconnect the solenoid connector.
2. Measure resistance between terminals 1 and 2
of solenoid connector.
Valve moves in
Valve moves in
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.
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTINGAT2±93
Page 578 of 2543
Repair or replace harness or connector.
Proceed to next circuit inspection shown on matrix
chart (See page AT2±64). However, when diagnostic
trouble code 77 is displayed, check and replace
ECM.
Check harness and connector between battery and No.5 solenoid valve, No.5
solenoid valve and ECM (See page IN±30).
AT2±94± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING
Page 579 of 2543
DTC 89 TRAC ECU Circuit
CIRCUIT DESCRIPTION
When the transmission is in the shift up or stall condition, the TRAC ECU sends a sub±throttle valve close
signal to the sub±throttle actuator.
DTC No. Diagnostic Code Detection Condition Trouble Area
89
All conditions below are detected 5 secs. or
more.
(a) No.1 vehicle speed sensor: 9 km/h (5.6 mph)
or more
(b) Mirror check of TRAC ECU input signal is
abnormal.
(c) TRAC ECU input signal does not inform to
ECM.
(d) TRAC ECU input signal order is abnormal.
Harness or connector between TRAC ECU
and ECM
TRAC ECU
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTINGAT2±95
Page 580 of 2543
INSPECTION PROCEDURE
Repair or replace harness or connector.
If the same code is still output after the diagnostic trouble code is deleted, check the contact
condition of each connection.
If the connections are normal, the TRAC ECU may be defective.
Check harness and connector between ECM and TRAC ECU (See page
IN±30).
Substitute another TRAC ECU.
Check diagnostic trouble code of TRAC ECU (See page BR±128).
AT2±96± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING
Page 581 of 2543
Throttle Position Sensor Circuit
CIRCUIT DESCRIPTION
The throttle position sensor detects the throttle valve opening angle and sends signals to ECM.
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTINGAT2±97
Page 582 of 2543
INSPECTION PROCEDURE
Check main throttle position signal.
Voltage changes from 0 V to 8 V by stages.
Turn ignition switch ON.
Do not depress the brake pedal during the test. The
voltage will stay at 0 V if depressed.
Check voltage at the terminal TT of the DLC2 while
gradually depressing the accelerator pedal from
the fully closed position to the fully opened position.
(Close) Throttle Valve Opening Angle (Open)
Proceed to next circuit inspection shown on
matrix chart (See page AT2±64).
Replace throttle position sensor.
Repair or replace harness or connector.
Check main (sub)±throttle position sensor. (see page EG±292, 293)
Check harness and connector between ECM and Main (Sub)±throttle
position sensor (See page IN±30).
Check and replace ECM.
AT2±98± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING
Page 583 of 2543
Kick±down Switch Circuit
The kick±down switch is turned on when the accelerator pedal
is depressed beyond the full throttle opening and sends signals
to ECM.
When the kick±down switch is turned on, the ECM controls
gear shifting according to the programmed shift diagrams.
If a short circuit develops in the kick±down switch, the ECM dis-
regards the kick±down signals and controls shifting at the nor-
mal shift points.
CIRCUIT DESCRIPTION
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTINGAT2±99
Page 584 of 2543
Check voltage between terminal KD of ECM connector and body ground.
1. Connect the Check Harness A to the ECM
(See page EG±510).
2. Turn ignition switch ON.
Measure voltage between terminal KD of ECM con-
nector and body ground when accel. pedal is fully
depressed or not.
Fully depressed
(Kick±down SW is ON)
Released
(Kick±down SW is OFF)
Accel. pedalVoltage
Below 0.5 V
10 Ð 14 V
Proceed to next circuit inspection shown on
matrix chart (See page AT2±64).
1. Disconnect kick±down switch connector.
2. Measure resistance between terminals 1 and
2 of kick±down switch connector when kick±
down switch is on and off.
Kick±down switchResistance
ON0 (continuity)
(open)OFF
Replace kick±down switch.
Repair or replace harness or connector.
Check kick±down switch.
Check harness and connector between ECM and kick±down switch, kick±
down switch and body ground (See page IN±30).
Check and replace ECM.
INSPECTION PROCEDURE
AT2±100± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING