diagram TOYOTA SUPRA 1997 Service Repair Manual

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.

30SUPRAÐNEW FEATURES
2. ABS
General
The ABS (Anti±Lock Brake System) is designed to control the brake fluid pressure of the brake wheel cylinder to
help prevent wheel lock±up in instances of panic braking, and thus maintaining vehicle directional stability and
control.
System Diagram

31 SUPRAÐNEW FEATURES
Wiring Diagram

Manual Name
Pub. No.
(USA and CANADA)

SUPRA Repair Manual

Supra Electrical Wiring Diagram
Manual

1/2 SUPRA New Car Features
(Models except USA and CANADA)

SUPRA Chassis and Body Repair Manual

Supra Electrical Wiring Diagram
Manual

SUPRA New Car Features
(All Countries)

Fundamental Painting Procedures

Fundamental Body Repair ProceduresBRM024E
BRM002E NCF097E RM344E
EWD175Y NCF096U M/Y Version
M/Y Version
FOREWORD
This repair manual has been prepared to provide information on
the repair methods (including cutting and welding operations, but
excluding painting) for collision-damaged body components of the
TOYOTA SUPRA.
Applicable models: JZA80 series
This manual consists of body repair methods, exploded diagrams
and illustrations of the body components and other information re-
lating to body panel replacement such as handling precautions,
etc. However, it should be noted that the front fenders of the
TOYOTA models are bolted on and require no welding.
Body construction will sometimes differ depending on specifica-
tions and country of destination. Therefore, please keep in mind
that the information contained herein is based on vehicles for gen-
eral destinations.
For the repair procedures and specifications other than collisionda-
maged body components of the TOYOTA SUPRA refer to the fol-
lowing repair manuals.
If you require the above manuals, please contact your TOYOTA
Dealer.
All information contained in this manual is the most up-to-date at
the time of publication. However, specifications and procedures are
subject to change without prior notice.
TOYOTA MOTOR CORPORATION

mm in.
100
2003.94
7.87
QUARTER PANEL (CUT)
(Cut and Join Location)
Normal RoofBODY PANEL. REPLACEMENT RE-34
HOW TO USE THIS MANUAL
Each repair method description provided in Section RE of this manual comprises two pages, divided into
2 blocks (REMOVAL AND INSTALLATION) and includes illustrations to facilitate body repair.
REMOVAL
(Cut and Join Location)
(Cut and Join Location) 200 mm
Cut and Join Location
100 mm
Cut and Join
Location
(Cut and Join Location)
Sport Roof Cut and Join Location
(Cut Location for Supply Parts)
1. Cut and join the parts at the location shown above.
REPLACEMENT PARTS AND METHOD
(CUT)
QUARTER PANEL
Replacement method
(ASSY) Assembly replacement. . . . .
(CUT) Major cutting (less than 1/2 of parts used). . . . . .
(CUT-H) Half cutting (about 1/2 of parts used). . . .
(CUT-P) Partial cutting (most of parts used). . . .
Replacement parts
PARTS LOCATION
REMOVAL DIAGRAM
Describes in detail removal of the damaged parts involving repair by cutting.
REMOVAL GUIDE
Provides additional information to more efficiently help you perform the removal.
INTRODUCTIONIN-2

mm in.
50.20Normal Roof:
Sport Roof:
1. Before temporarily installing the new parts, apply
body sealer to the wheel arch.
HINT:1) Apply body sealer about 5 mm (0.20 in.) from the
flange, avoiding any oozing.
2) Apply sealer evenly, about 3 - 4 mm (0.12 - 0.16
in.) in diameter.
3) For other sealing points, refer to section AR.BODY PANEL REPLACEMENT
RE-36
INSTALLATION
Butt Weld
Butt Weld
Body Sealer
Butt Weld
Body Sealer
about 5 mm
2. Temporarily install the new parts and check the fit of
the front door, back door and rear combination lamp.
3. Apply foamed material to the pillar section.HINT: For the foamed material application areas, refer to
page AP-4.
INSTALLATION DIAGRAM
Describes in detail installation of the new parts involving repair by welding and/or cutting, but
excluding painting.
INSTALLATION GUIDE
Provides additional information to more efficiently help you perform the installation.
SYMBOLS
See page IN-4.
ILLUSTRATION OF WELD POINTS
Weld method and panel position symbols.
See page IN-5.
INTRODUCTIONIN-3

SYMBOLSMEANINGILLUSTRATION
SAW CUT OR
ROUGH CUT
REMOVE BRAZE
(See page IN-5) SPOT WELD OR
MIG PLUG WELD WELD POINTS
BRAZE CONTINUOUS MIG
WELD (BUTT WELD
OR TACK WELD)
BODY SEALER
SYMBOLS
The following symbols are used in the welding Diagrams in Section RE of this manual to indicate cutting
areas and the types of weld required.
INTRODUCTIONIN-4

Proper and Efficient Work Procedures
REMOVAL
NUMBER OF SPOT WELDS AND PANEL POSITIONS
The number of spot welds and the panel positions to be
removed are shown for your reference.
HINT: See ºSymbolsº on page IN-4, 5.
PRE-REMOV AL MEASURING
Before removal or cutting
operations, take measurements
in accordance with the dimension
diagram. Always use a puller to
straighten a damaged body or
frame.
REMOVAL OF ADJACENT COMPONENTS
When removing adjacent components, apply
protective tape to the surrounding body and
your tools to prevent damage.
HINT: See ºHandling Precautions on Related
Componentsº on age IN-6.
PRECAUTIONS FOR DRILLING OR
CUTTING
Check behind any area to be drilled or
cut to insure that there are no hoses,
wires, etc., that may be damaged.
HINT: See ºHandling Precautions on
Related Componentsº on page IN-6.
CUTTING AREA
Always cut in a straight
line and avoid reinforced
area.
Cutting Okay
Corners
Reinforcement
WRONG
INTRODUCTIONIN-11

SPOT WELD LOCATIONS
Try to avoid welding over pre-
vious spots.
New Spot
Locations
WELDING PRECAUTIONS
1. The number of welding
spots should be as follows.
Spot weld: 1.3 x No. of
manufacturer's spots.
Plug weld: More than No.
of manufacturer's plugs.
INSTALLATION
POST-WELDLNG REFINISH-
ING
1. Always check the welded
spots to insure they are
secure.
2. When smoothing out the
weld spots with a disc
grinder, be careful not to
grind off too much as this-
would weaken the weld. PRE-WELDING MEASUREMENTS
Always take measurements
before installing underbody or
engine components to insure
correct assembly. After installation,
confirm proper fit.
WRONG
WRONG
OKAY
2. Plug welding should be done
with a MIG (Metal Inert Gas)
welder. Do not gas weld or
braze panels at areas other
than specified.
Safety Glass
Body
Measurement
Diagrams
SPOT WELDING PRECAUTIONS
1. The shape of the welding tip
point has an effect on the
strength of the weld.
2. Always insure that the seams
and welding tip are free of
paint.
Oil
spot
Locations
Tip Cutter
INTRODUCTIONIN-13

mm in.
15
200.59
0.79
INSTALLATION
(Left Side)
(Right Side)
Tack Weld (20 mm each)Tack Weld
(20 mm each)
Assembly Mark
Tack Weld
(15 mm each)
1. When temporarily installing the new parts,
determine the installation position by the
assembly mark. Then, measure each part
in accordance with the body dimension
diagram.
BODY PANEL REPLACEMENTRE-21