1997 TOYOTA SUPRA light

Q04128
Q06366
Q04133
MT-4
- MANUAL TRANSMISSION (V160)MANUAL TRANSMISSION UNIT
1572 Author
: Date
:
1997 SUPRA (RM502U)
7. REMOVE EXHAUST CENTER PIPE
(a) Remove the 4 nuts and 2 gaskets.
Torque: 19 N´m (195 kgf´cm, 14 ft´lbf)
(b) Disconnect the exhaust center pipe from the 2 rings.
(c) Remove the exhaust center pipe.
8. REMOVE HEAT INSULATOR
Remove the 4 nuts and heat insulator.
Torque: 5.4 N´m (55 kgf´cm, 48 in.´lbf)
9. REMOVE CROSSMEMBER BRACE
Remove the 4 bolts (Normal Roof) or 6 bolts (Sport Roof) and
crossmember brace.
Torque: 13 N´m (130 kgf´cm, 9 ft´lbf)
10. REMOVE PROPELLER SHAFT
(See page PR-2)
11. REMOVE TRANSMISSION SHIFT LEVER
(a) Remove the bolt and nut.
(b) Remove the transmission shift lever, inside the vehicle.
Torque: 19 N´m (195 kgf´cm, 14 ft´lbf)
12. REMOVE CLUTCH RELEASE CYLINDER AND
GROUND CABLE
(a) Remove the bolt, clamp and ground cable.
Torque: 72 N´m (730 kgf´cm, 53 ft´lbf)
(b) Remove the 2 bolts and clutch release cylinder.
Torque: 12 N´m (120 kgf´cm, 9 ft´lbf)
13. DISCONNECT STARTER WIRE
(a) Remove the nut and disconnect the starter wire.
(b) Disconnect the starter wire connector.
14. DISCONNECT VEHICLE SPEED SENSOR AND
BACK-UP LIGHT SWITCH CONNECTORS

Q04136Matchmarks
Q04137
Q04138
Q04341
Q04141
A
B
A
- MANUAL TRANSMISSION (V160)MANUAL TRANSMISSION UNIT
MT-5
1573 Author
: Date
:
1997 SUPRA (RM502U)
15. REMOVE CLUTCH COVER SET BOLT
(a) Remove the 2 bolts and service hole cover.
Torque: 12 N´m (120 kgf´cm, 9 ft´lbf)
(b) Place matchmarks on the flywheel and clutch cover.
(c) Remove the 6 bolts.
Torque: 19 N´m (195 kgf´cm, 14 ft´lbf)
16. JACK UP TRANSMISSION SLIGHTLY
Using a transmission jack, support the transmission.
17. REMOVE REAR ENGINE MOUNTING MEMBER
Remove the 4 nuts, bolts and rear engine mounting member.
Torque:
Nut: 13 N´m (135 kgf´cm, 10 ft´lbf)
Bolt: 25 N´m (260 kgf´cm, 19 ft´lbf)
18. REMOVE STARTER
Lower the engine rear side and remove the 2 bolts and starter.
Torque: 39 N´m (400 kgf´cm, 29 ft´lbf)
19. REMOVE TRANSMISSION
Remove the 5 transmission mounting bolts and transmission
from the engine.
Torque: 72 N´m (730 kgf´cm, 53 ft´lbf)
20. REMOVE SHIFT LEVER RETAINER
Remove the 5 bolts, nut and shift lever retainer from the trans-
mission.
Torque:
Bolt A: 19 N´m (195 kgf´cm, 14 ft´lbf)
Nut B: 25 N´m (250 kgf´cm, 18 ft´lbf)
21. REMOVE ENGINE REAR MOUNTING
Remove the 4 bolts and engine rear mounting from the trans-
mission.
Torque: 25 N´m (250 kgf´cm, 18 ft´lbf)

B02917
- INTRODUCTIONFOR ALL OF VEHICLES
IN-1 1
11 Author
: Date
:
1997 SUPRA (RM502U)
(3) Even in cases of a minor collision where the SRS
does not deploy, the steering wheel pad, front pas-
senger airbag assembly and front airbag sensor
should be inspected (See page SR- 8, RS- 22,
RS-34).
(4) Never use SRS parts from another vehicle. When
replacing parts, replace them with new parts.
(5) Before repairs, remove the airbag sensor if shocks
are likely to be applied to the sensor during repairs.
(6) Never disassemble and repair the airbag sensor as-
sembly, steering wheel pad or front passenger air-
bag assembly in order to reuse it.
(7) If the airbag sensor assembly, steering wheel pad
or front passenger airbag assembly have been
dropped, or if there are cracks, dents or other de-
fects in the case, bracket or connector, replace
them with new ones.
(8) Do not expose the airbag sensor assembly, steer-
ing wheel pad and front passenger airbag assembly
directly to hot air or flames.
(9) Use a volt/ohmmeter with high impedance (10 kW/V
minimum) for troubleshooting of the electrical cir-
cuit.
(10) Information labels are attached to the periphery of
the SRS components. Follow the instructions on
the notices.
(11) After work on the supplemental restraint system is
completed, check the SRS warning light (See page
RS-1).
(c) SPIRAL CABLE (in Combination Switch)
The steering wheel must be fitted correctly to the steering
column with the spiral cable at the neutral position, other-
wise cable disconnection and other troubles may result.
Refer to of this manual concerning correct steering wheel
installation.

B02572
TRAC OFF
Indicator Light
TRAC Cut
Switch
N19405
- INTRODUCTIONFOR ALL OF VEHICLES
IN-15
15 Author
: Date
:
1997 SUPRA (RM502U)
(c) Install the antenna feeder at least 20 cm (7.87 in.) away from the ECU and sensors of the vehicle's
electronics systems. For details about ECU and sensors locations, refer to the section on the applica-
ble component.
(d) Do not wind the antenna feeder together with the other wiring. As much as possible, also avoid running
the antenna feeder parallel with other wire harnesses.
(e) Confirm that the antenna and feeder are correctly adjusted.
(f) Do not install powerful mobile communications system.
4. FOR USING OBDII SCAN TOOL OR TOYOTA HAND-HELD TESTER
Observe the following for safety reasons:

Before using the OBDII scan tool or TOYOTA hand-held tester, the OBDII scan tool's instruction
book or TOYOTA hand-held tester's operator manual should be read thoroughly.

Be sure to route all cables securely when driving with the OBDII scan tool or TOYOTA hand-held
tester connected to the vehicle. (i.e. Keep cables away from feet, pedals, steering wheel and shift
lever.)

Two persons are required when test driving with the OBDII scan tool or TOYOTA hand-held tes-
ter, one person to drive the vehicle and one person to operate the OBDII scan tool or TOYOTA
hand-held tester.
5. FOR VEHICLES EQUIPPED WITH TRACTION CON-
TROL (TRAC) SYSTEM
When using a 2 wheel drum tester such as a speedometer tes-
ter or chassis dynamometer, etc., or jacking up the rear wheels
and driving the wheels, always push in the TRAC cut (ºTRAC
OFFº) switch and turn the TRAC system OFF.
(a) Confirm TRAC system is OFF
(1) Press the TRAC cut (ºTRAC OFFº) switch.
(2) Check that the TRAC OFF indicator light comes on
when the TRAC system is turned off by the TRAC
cut switch.
HINT:
The TRAC OFF indicator light should always operate right after
the engine is restarted.
(3) Begin measurements.

N19108
F01960
2JZ-GE
2JZ-GTENo.2 Joint No.3 Joint
A - B = -1°09' ± 36'
No.2 Joint
A - B = -1°09' ± 36'B - C = 44' ± 36'
No.3 Joint
B - C = 44' ± 36'Joint Angle- :
+ :
A
B
C
A
B
C>>
IN-16
- INTRODUCTIONFOR ALL OF VEHICLES
16 Author
: Date
:
1997 SUPRA (RM502U)
(4) Press the TRAC cut switch again to change the
TRAC to oprative and check that the TRAC OFF in-
dicator light goes off.
HINT:
The SLIP indicator light blinks when the TRAC system is opera-
tive.
6. INSPECTION AND ADJUSTMENT OF JOINT ANGLE DURING REMOVAL AND INSTALLATION OF
PROPELLER SHAFT
When performing operations which involve the removal and installation of the propeller shaft, always check
the joint angle. Make adjustments if necessary (See page PR-14).

V07268
VIBRATION METHOD: When vibration seems to be the major cause.
CONNECTORS
WIRE HARNESS
PARTS AND SENSOR1
Slightly shake the connector vertically and horizontally.
Slightly shake the wire harness vertically and horizontally.
The connector joint, fulcrum of the vibration, and body
through portion are the major areas to be checked thorough-
ly.
Apply slight vibration with a finger to the part of the sensor
considered to be the problem cause and check if the
malfunction occurs.Shake Slightly
Swing Slightly
Vibrate Slightly
HINT: Applying strong vibration to relays may result in open
relays. IN-22
- INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
22 Author
: Date
:
1997 SUPRA (RM502U)
3. SYMPTOM SIMULATION
The most difficult case in troubleshooting is when there are no problem symptoms occurring. In such cases,
a thorough customer problem analysis must be carried out, then simulate the same or similar conditions and
environment in which the problem occurred in the customer's vehicle. No matter how much experience a
technician has, or how skilled he may be, if he proceeds to troubleshoot without confirming the problem
symptoms he will tend to overlook something important in the repair operation and make a wrong guess
somewhere, which will only lead to a standstill. For example, for a problem which only occurs when the en-
gine is cold, or for a problem which occurs due to vibration caused by the road during driving, etc., the prob-
lem can never be determined so long as the symptoms are confirmed with the engine hot condition or the
vehicle at a standstill. Since vibration, heat or water penetration (moisture) are likely causes for problems
which are difficult to reproduce, the symptom simulation tests introduced here are effective measures in that
the external causes are applied to the vehicle in a stopped condition.
Important Points in the Symptom Simulation Test:
In the symptom simulation test, the problem symptoms should of course be confirmed, but the problem area
or parts must also be found out. To do this, narrow down the possible problem circuits according to the symp-
toms before starting this test and connect a tester beforehand. After that, carry out the symptom simulation
test, judging whether the circuit being tested is defective or normal and also confirming the problem symp-
toms at the same time. Refer to the matrix chart of problem symptoms for each system to narrow down the
possible causes of the symptom.

V07469
HEAT METHOD: When the problem seems to occur when the suspect area is heated. 2
NOTICE:
(1) Do not heat to more than 60 °C (140 °F). (Temperature
is limited not to damage the components.)
(2) Do not apply heat directly to parts in the ECU.
3 WATER SPRINKLING METHOD:
NOTICE:
(1) Never sprinkle water directly into the engine
compartment, but indirectly change the temperature and
humidity by applying water spray onto the radiator front
surface.
(2) Never apply water directly onto the electronic
components.
4 OTHER: When a malfunction seems to occur when electrical load is excessive.When the malfunction seems to occur on a rainy day or in a
high-humidity condition. Heat the component that is the likely cause of the malfunction
with a hair dryer or similar object. Check to see if the malfunction
occurs.
Sprinkle water onto the vehicle and check to see if the malfunc-
tion occurs.
Turn on all electrical loads including the heater blower, head
lights, rear window defogger, etc. and check to see if the mal-
function occurs.ON (Service hint)
If a vehicle is subject to water leakage, the leaked water may
contaminate the ECU. When testing a vehicle with a water leak-
age problem, special caution must be taken.
Malfunc-
tion
- INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMSIN-23
23 Author
: Date
:
1997 SUPRA (RM502U)

V08423 Knock Sensor 1
GRECM
KNK
E1 12
E6
WIRING DIAGRAM
DTC P0325Knock Sensor 1 Circuit Malfunction
CIRCUIT DESCRIPTION
Knock sensor is fitted to the cylinder block to detect engine knocking. This sensor contains a piezoelectric element which
generates a voltage when it becomes deformed, which occurs when the cylinder block vibrates due to knocking. If engine
knocking occurs, ignition timing is retarded to suppress it.
DTC No. DTC Detecting Condition Trouble Area
P0325No knock sensor 1 signal to ECM with engine speed,
1,200 rpm or more.
Open or short in knock sensor1 circuit

Knock sensor 1 (looseness)

ECM
If the ECM detects the above diagnosis conditions, it operates the fall safe function in which the corrective retard angle
value is set to the maximum value.

Diagnostic Trouble Code No. and Detection Item

Circuit Description
The major role and operation, etc. of the circuit
and its component parts are explained.

Indicates the diagnostic trouble code, diagnostic
trouble code set parameter and suspect area of
the problem.

Wiring Diagram
This shows a wring diagram of the circuit.
Use the diagram together with ELECTRICAL
WIRING DIAGRAM to thoroughly understand the
circuit.
Wiring colors are indicated by an alphabetical code.
B = Black, L = Blue, R = Red, BR = Brown,
LG = Light Green, V = Violet, G = Green,
O = Orange, W = White, GR = Gray, P = Pink,
Y = Yellow
The first letter indicates the basic wire color and
the second letter indicates the color of the stripe. IN-26
- INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
26 Author
: Date
:
1997 SUPRA (RM502U)
6. CIRCUIT INSPECTION
How to read and use each page is shown below.