TOYOTA SUPRA 1995 Service Repair Manual

11. DISCONNECT OIL COOLER PIPES
(a) Remove the 3 bolts and oil cooler pipe clamps.
(b) Disconnect the 2 oil cooler pipes.
Torque: 34 NVm (350 kgfVcm, 25 ftVlbf)
12. REMOVE TORQUE CONVERTER CLUTCH MOUNTING
BOLTS
(a) Remove the engine under cover.
(b) Remove the converter plate.
(c) Turn the crankshaft to gain access to each bolt.
Remove the 6 bolts.
Torque: 33 NVm (340 kgfVcm, 25 ftVlbf)
13. JACK UP TRANSMISSION
14. REMOVE REAR MOUNTING
Remove the 4 bolts and rear mounting.
Torque: 25 NVm (260 kgfVcm, 19 ftVlbf)
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONASSEMBLY REMOVAL AND INSTALLATIONAT1±25

15. REMOVE STARTER
(a) Disconnect the connector.
(b) Remove the nut and cable.
(c) Remove the 2 bolts and starter.
Torque: 37 NVm (380 kgfVcm, 27 ftVlbf)
16. REMOVE TRANSMISSION
Remove the 9 bolts and transmission.
Torque:
14 mm head bolt: 37 NVm (380 kgfVcm, 27 ftVlbf)
17 mm head bolt: 72 NVm (730 kgfVcm, 53 ftVlbf)
TORQUE CONVERTER CLUTCH AND
DRIVE PLATE INSPECTION
1. INSPECT ONE±WAY CLUTCH
(a) Install SST in the inner race of one±way clutch.
SST 09350±30020 (09351±32010)
(b) Install SST so that it fits in the notch of the converter hub and
outer race of the one±way clutch.
SST 09350±30020 (09351±32020) AT1±26
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONASSEMBLY REMOVAL AND INSTALLATION

(c) With the torque converter clutch standing on its side the
clutch should lock when turned counterclockwise, and rotate
freely and smoothly clockwise.
If necessary, clean the converter clutch and retest the clutch.
Replace the converter if the clutch still fails the test.
2. MEASURE DRIVE PLATE RUNOUT AND INSPECT RING
GEAR
Set up a dial indicator and measure the drive plate runout.
Maximum runout:
0.20 mm (0.0079 in.)
If runout exceeds 0.20 mm (0.0079 in.) or if the ring gear is
damaged, replace the drive plate. If installing a new drive
plate, note the orientation of spacers and tighten the bolts.
Torque: 74 NVm (750 kgfVcm, 54 ftVlbf)
3. MEASURE TORQUE CONVERTER CLUTCH SLEEVE
RUNOUT
(a) Temporarily mount the torque converter clutch to the drive
plate. Set up a dial indicator.
Maximum runout:
0.30 mm (0.0118 in.)
If runout exceeds 0.30 mm (0.0118 in.), try to correct by reori-
enting the installation of the converter clutch. If excessive
runout cannot be corrected, replace the torque converter
clutch.
HINT: Mark the position of the converter clutch to ensure cor-
rect installation.
(b) Remove the torque converter clutch.
TORQUE CONVERTER CLUTCH
INSTALLATION
1. INSTALL TORQUE CONVERTER CLUTCH
TRANSMISSION
2. CHECK TORQUE CONVERTER CLUTCH INSTALLATION
Using feeler gauge and a straight edge, measure between
the installed surface of the transmission and the straight
edge.
Clearance:
Less than 0.1 mm (0.004 in.)
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONASSEMBLY REMOVAL AND INSTALLATIONAT1±27

SHIFT LOCK SYSTEM
COMPONENT PARTS LOCATION
WIRING DIAGRAM
AT1±28± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONSHIFT LOCK SYSTEM

ELECTRONIC CONTROL COMPONENTS
INSPECTION
1. INSPECT SHIFT LOCK CONTROL ECU
Using a voltmeter, measure the voltage at each terminal.
 Connector Terminal Measuring condition Voltage (V)
  ACC ± E IG SW ACC 10 ± 14
  IG ± E IG SW ON 10 ± 14
 
A
 STP ± E Depress brake pedal 10 ± 14
 A  (1) IG SW ACC and P position Below 1
  KLS ± E (2) R, N, D, 2, L position 7.5 ± 11   (3) R, N, D, 2, L position (after 1 second) 6 ± 9.5   (1) IG SW ON and P position Below 1 
B
 
SLS ( ) SLS (+)
 (2) Depress brake pedal 8 ± 13.5 
 
B 
 
SLS (±) ± SLS (+) 
 (3) 
 Depress brake pedal (after 20 seconds) 
 6 ± 8.5
   (4) R, N, D, 2, L position Below 1
  P1P (1) IG SW ON, P position and depress brake pedal Below 1
 C 
P1 ± P
 (2) R, N, D, 2, L position 9 ± 13.5
 C P2P (1) IG SW ACC and P position 9 ± 13.5
  P2 ± P (2) R, N, D, 2, L position Below 1
2. INSPECT SHIFT LOCK SOLENOID
(a) Disconnect the solenoid connector.
(b) Usin g an oh mme te r, me a su re th e re sista n ce be twe e n
terminals 1 and 2.
Standard resistance:
20±28

If resistance value is not as specified, replace the solenoid.
(c) Apply battery positive voltage between terminals 1 and 2. At
this time, confirm that the solenoid operates.
If the solenoid does not operated, replace the solenoid.
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONSHIFT LOCK SYSTEMAT1±29

3. INSPECT KEY INTERLOCK SOLENOID
(a) Disconnect the solenoid connector.
(b) Usin g an oh mme te r, me a su re th e re sista n ce be twe e n
terminals 1 and 2.
Standard resistance:
12±17

If resistance value is not as specified, replace the solenoid.
(c) Touch the solenoid with your finger and check that solenoid
operation can be felt when battery positive voltage is applied
intermittently to the terminals 1 and 2.
If the solenoid does not operated, replace the solenoid.
4. INSPECT SHIFT LOCK CONTROL SWITCH
Inspect that there is continuity between each terminal.
 
 Shift position
 
 Tester condition to
terminal number 
 Specified value
 P position (ReleasePPContinuity P osition (Release
button is not pushed)P±P1Continuity
 RND2LpositionPPContinuityR, N, D, 2, L positionP±P2Continuity
AT1±30± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONSHIFT LOCK SYSTEM

TROUBLESHOOTING
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONTROUBLESHOOTINGAT1±31

HOW TO PROCEED WITH TROUBLESHOOTING
Vehicle Brought to Workshop
Customer Problem Analysis
P. AT1±33
Check and Clear Diagnostic Trouble Codes (Precheck)
P. AT1±33 ~AT1±35
Problem Symptom Confirmation
P. AT1±37
Symptom Simulation
P. IN±24
Diagnostic Trouble Code Check
P. AT1±34 ~AT1±35
Preliminary Check
P. AT1±42
Diagnostic Trouble Code Check
P. AT1±52
Shift Position Signal Check
P. AT1±36
Mechanical System Tests
P. AT1±44
Manual Shifting Test
P. AT1±50
Items insideare titles of pages in this manual,
with the page number indicated in the bottom portion.
See the indicated pages for detailed explanations.
Step [2], [5], [12], [15]:
Diagnostic steps permitting the use of the TOYOTA hand±
held tester or TOYOTA brake±out box.
Matrix Chart of Problem Symptoms ± P. AT1±57
Chapter 1
(Electronic)Chapter 2
(On±Vehicle)Chapter 3
(OFF±Vehicle)
P. AT1±60P. AT1±58
Circuit
Inspection
Main Throttle Signal Check

Stop Light Signal Check

Kick±Down Signal Check
P. AT1±62
Parts Inspection
P. AT1±64 ~AT1±95
Identification of ProblemRepairConfirmation TestEnd
AT1±32± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING

CUSTOMER PROBLEM ANALYSIS
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONTROUBLESHOOTINGAT1±33

DIAGNOSIS SYSTEM
The Electronically Controlled Transmission has built±in self±
diagnostic functions. If a malfunction occurs in the system,
the ECM stores the diagnostic trouble code in memory and
the O/D OFF (Overdrive OFF) indicator light blinks to inform
the driver. The diagnostic trouble code stored in memory can
be read out by the following procedure.
O/D OFF INDICATOR LIGHT INSPECTION
1. Turn the ignition switch ON.
2. Check if the O/D OFF indicator light lights up when the O/D
main switch is pushed out to OFF and goes off when the O/D
main switch is pushed in to ON.
HINT: If the O/D OFF indicator light does not light up or stay
on all the time, carry out the check for ºO/D OFF Indicator
Light Circuitº on page AT1±88.
DIAGNOSTIC TROUBLE CODE CHECK
1. Turn the ignition switch ON, but do not start the engine.
2. Push in the O/D main switch to ON.
HINT: Warning and diagnostic trouble codes can be read only
when the O/D main switch is ON. If it is OFF, the O/D OFF indi-
cator light up will light continuously and will not blink.
3. Using SST, connect terminals TE1 and E1 of the DLC 1 or
DLC2.
SST 09843±18020
4. Read the diagnostic trouble code indicated by the number of
times the O/D OFF indicator light blinks.
HINT: If the system is operating normally, the light will blink
2 times per second. AT1±34
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING