1997 TOYOTA SUPRA service indicator

Illustration:
what to do and where
21. CHECK PISTON STROKE OF OVERDRIVE BRAKE
(a) Place SST and a dial indicator onto the overdrive brake
piston as shown in the illustration.
Task heading : what to do
SST 09350-30020 (09350-06120)
Set part No. Component part No.
Detailed text : how to do task
(b) Measure the stroke applying and releasing the compressed
Piston stroke: 1.40
1.70 mm (0.0551
0.0669 in.)
Specification
air (392 - 785 kPa, 4 - 8 kgf.cm2 or 57 - 114 psi) as
shown in the illustration. IN-2
- INTRODUCTIONHOW TO USE THIS MANUAL
2 Author
: Date
:
1997 SUPRA (RM502U)
The procedures are presented in a step-by-step format:

The illustration shows what to do and where to do it.

The task heading tells what to do.

The detailed text tells how to perform the task and gives other information such as specifications
and warnings.
Example:
This format provides the experienced technician with a FAST TRACK to the information needed. The upper
case task heading can be read at a glance when necessary, and the text below it provides detailed informa-
tion. Important specifications and warnings always stand out in bold type.
6. REFERENCES
References have been kept to a minimum. However, when they are required you are given the page to refer
to.
7. SPECIFICATIONS
Specifications are presented in bold type throughout the text where needed. You never have to leave the
procedure to look up your specifications. They are also found in Service Specifications section, for quick
reference.

CAUTIONS are presented in bold type, and indicate there is a possibility of injury to you or other
people.

NOTICES are also presented in bold type, and indicate the possibility of damage to the compo-
nents being repaired.

HINTS are separated from the text but do not appear in bold. They provide additional information
to help you perform the repair efficiently.
8. SI UNIT
The UNITS given in this manual are primarily expressed according to the SI UNIT (International System of
Unit), and alternately expressed in the metric system and in the English System.
Example:
Torque: 30 N´m (310 kgf´cm, 22 ft´lbf)

IN-36
- INTRODUCTIONTERMS
36 Author
: Date
:
1997 SUPRA (RM502U) HO2S
Heated Oxygen SensorHeated Oxygen Sensor (HO2S)
IACIdle Air ControlIdle Speed Control (ISC)
IATIntake Air TemperatureIntake or Inlet Air Temperature
ICMIgnition Control Module-
IFIIndirect Fuel InjectionIndirect Injection
IFSInertia Fuel-Shutoff-
ISCIdle Speed Control-
KSKnock SensorKnock Sensor
MAFMass Air FlowAir Flow Meter
MAPManifold Absolute PressureManifold Pressure
Intake Vacuum
MCMixture Control
Electric Bleed Air Control Valve (EBCV)
Mixture Control Valve (MCV)
Electric Air Control Valve (EACV)
MDPManifold Differential Pressure-
MFIMultiport Fuel InjectionElectronic Fuel Injection (EFI)
MILMalfunction Indicator LampCheck Engine Light
MSTManifold Surface Temperature-
MVZManifold Vacuum Zone-
NVRAMNon-V olatile Random Access Memory-
O2SOxygen SensorOxygen Sensor, O2 Sensor (O2S)
OBDOn-Board DiagnosticOn-Board Diagnostic (OBD)
OCOxidation Catalytic ConverterOxidation Catalyst Converter (OC), CCo
OPOpen LoopOpen Loop
PAIRPulsed Secondary Air InjectionAir Suction (AS)
PCMPowertrain Control Module-
PNPPark/Neutral Position-
PROMProgrammable Read Only Memory-
PSPPower Steering Pressure-
PTOXPeriodic Trap OxidizerDiesel Particulate Filter (DPF)
Diesel Particulate Trap (DPT)
RAMRandom Access MemoryRandom Access Memory (RAM)
RMRelay Module-
ROMRead Only MemoryRead Only Memory (ROM)
RPMEngine SpeedEngine Speed
SCSuperchargerSupercharger
SCBSupercharger Bypass-
SFISequential Multiport Fuel InjectionElectronic Fuel Injection (EFI), Sequential Injection
SPLSmoke Puff Limiter-
SRIService Reminder Indicator-
SRTSystem Readiness Test-
STScan Tool-
TBThrottle BodyThrottle Body
TBIThrottle Body Fuel InjectionSingle Point Injection
Central Fuel Injection (Ci)
TCTurbochargerTurbocharger
TCCTorque Converter ClutchTorque Converter

169
TRACTION CONTROL
TRACTION CONTROL IS THE SYSTEM TO REALIZE A FAVORABLE ACCELERATOR CONTROLABILITY BY MAKING
THE ENGINE OUTPUT MOST APPROPRIATE FOR THE ACCELERATION UNDER EACH DRIVING CONDITION
PROVIDED BY THE THROTTLE ECU.
(TRACTION OFF SW)
THIS IS THE SWITCH TO STOP THE OPERATION OF SLIP CONTROL. AFTER STARTING THE ENGINE, PRESSING THE
SWITCH ONE TIME UNDER THE CONDITION THAT THE SNOW INDICATOR DOES NOT LIGHT ON, MAKES IT IN THE
OPERATION STOP CONDITION (OFF), AND PRESSING IT ONE MORE TIME MAKES IT IN THE OPERATION WAITING
CONDITION. IN ADDITION, RESTARTING AFTER THE ENGINE STOP MAKES IT IN THE OPERATION WAITING
CONDITION WITHOUT CONCERNING THE TRACTION OFF SW.
(SNOW MODE SW)
THIS IS THE SWITCH TO FIX LOW  LOADS CONTROL AT THE TIME OF DRIVING ON A SLIPPERY ROAD SUCH AS
SNOWY ROAD. AFTER STARTING THE ENGINE, PRESSING THE SWITCH MAKES IT FIX AT LOW LOAD CONTROL
AND SNOW INDICATOR LIGHT COMES ON. IN ADDITION, RESTARTING AFTER THE ENGINE STOP MAKES IT ALWAYS
IN NORMAL CONDITION (AUTO MODE) WITHOUT CONCERNING THE SNOW MODE SW CONDITION. PRESSING THE
SNOW MODE SW UNDER OPERATION PROHIBITION CONDITION OF THE TRACITION (TRAC OFF INDICATOR LIGHTS
ON.) CANCELS THE OPERATION PROHIBITION OF THE TRACTION AND ALSO FIXES IT AT LOW  LOAD CONTROL.
(TRAC OFF INDICATOR LIGHT)
THIS LIGHT COMES ON BY SELECTING THE OPERATION STOP CONDITION OF THE TRACTION CONTROL WITH
TRACTION OFF SW AND ALERTS THE DRIVER TO BE IN OPERATION STOP CONDITION AND ALSO ALERTS THE
DRIVER BY BLINKING IN CASE OF THE OCCURANCE OF THE SYSTEM MAULFUCTION.
T15 (A), T16 (B)THROTTLE ECU
WT-E1: 0.3 VOLTS WITH THE IGNITION SW ON AND THE TRAC OFF INDICATOR LIGHT ON
9-14 VOLTS WITH THE IGNITION SW ON AND THE TRAC OFF INDICATOR LIGHT OFF
IND-E1 :0.3 VOLTS WITH THE IGNITION SW ON AND SLIP INDICATOR LIGHT ON
:9-14 VOLTS WITH THE IGNITION SW ON AND SLIP INDICATOR LIGHT OFF
CSW-E1:0.3 VOLTS WITH THE IGNITION SW ON AND THE TRAC OFF SW HOLDED ON PUSHING
:9-14 VOLTS WITH THE IGNITION SW ON AND THE TRAC OFF SW RELEASED
SIND-E10.3 VOLTS WITH THE IGNITION SW ON AND THE SNOW INDICATOR LIGHT ON
9-14 VOLTS WITH THE IGNITION SW ON AND THE SNOW INDICATOR LIGHT OFF
SNOW-E1:0.3 VOLTS WITH THE IGNITION SW ON AND THE SNOW MODE SW HELD ON PUSHING
:9-14 VOLTS WITH THE IGNITION SW ON AND THE SNOW MODE SW RELEASED
NE-E1: PULSE GENERATION (ENGINE IDLING)
TC-E1:4.5-5.5 VOLTS WITH THE IGNITION SW ON AND THE ENGINE NOT RUNNING
WA-E1:9-14 VOLTS WITH THE IGNITION SW ON AND THE ABS ECU NORMAL CONDITION
0.3 VOLTS WITH THE IGNITION SW ON AND THE ABS ECU ABNORMAL CONDITION
EFIB-E19-14 VOLTS WITH THE IGNITION SW ON AND THE ENGINE NOT RUNNING
IDL2-E1:9-14 VOLTS WITH THE ENGINE RUNNING AND THE SUB THROTTLE VALVE FULLY OPEN
0-3 VOLTS WITH THE ENGINE RUNNING AND THE SUB THROTTLE VALVE FULLY CLOSED
VTA2-E1:3.2-4.9 VOLTS WITH THE ENGINE RUNNING AND THE SUB THROTTLE VALVE FULLY OPEN
0.3-0.8 VOLTS WITH THE ENGINE RUNNING AND THE SUB THROTTLE VALVE FULLY CLOSED
BATT-E1: ALWAYS 9-14 VOLTS
+B-E1:9-14 VOLTS WITH THE IGNITION SW ON AND ENGINE NOT RUNNING
IDL1-E1:9-14 VOLTS WITH THE IGNITION SW ON AND THE THROTTLE VALVE FULLY OPEN
0-3 VOLTS WITH THE IGNITION SW ON AND THE THROTTLE VALVE FULLY CLOSED
VTA1-E1:3.2-4.9 VOLTS WITH THE IGNITION SW ON AND THE THROTTLE VALVE FULLY OPEN
0.3-0.8 VOLTS WITH THE IGNITION SW ON AND THE THROTTLE VALVE FULLY CLOSED
RLY+-RL Y :9-14 VOLTS WITH THE IGNITION SW ON
A,A-,B,B+--EO1: PULSE GENERATION (ENGINE RUNNING AND THE THROTTLE VALVE FULLY CLOSED)
EFI+,EFI-, ETC+,ETC--E1: PULSE GENERATION (IGNITION SW ON)
T 8 TRACTION CONTROL SW
4-6:CLOSED WITH THE TRACTIOIN CONTROL SW AT OFF POSITION
8-6:CLOSED WITH THE TRACTIOIN CONTROL SW AT SNOW POSITION
S18 SUB THROTTLE VALVE MOTOR
4-6, 3-1:APPROX. 0.44 W
SYSTEM OUTLINE
SERVICE HINTS