1995 TOYOTA SUPRA battery

  ANTENNA MOTOR CONTROL RELAY (Wire Harness Side) 
  1 ± Ground (Constant) Battery positive voltage
  4 ± Ground (Ignition SW position ON) Battery positive voltage 
  5 ± Ground (Ignition SW position ACC or ON)
 
 Battery positive voltage
  7 ± Ground (Ignition SW position ACC or ON and radio SW ON) Battery positive voltage
  8 ± Ground (Ignition SW position ACC or ON) Battery positive voltage
± BODY ELECTRICAL SYSTEMSERVICE SPECIFICATIONSBE±203

GENERAL INFORMATION
HANDLING PRECAUTIONS
Taping
When it is possible that the body or parts may be scratched
during the operation, apply protective tape before starting
work.
Example:
1. Before starting work, apply protective tape to body
surfaces around parts to be removed and installed.
2. Before prying parts loose with a screwdriver or scraper
etc., apply protective tape to the tip of the tool to avoid
scratching parts or painted surfaces of the body.
Battery
In order to prevent a short circuit while doing work on the elec-
trical circuit such as disconnecting a connector, first turn off
the ignition switch and disconnect the negative (±) terminal
cable from the battery before starting work.
HINT: When battery voltage is required for operation of a
functioning part, connect the cable to the battery when need-
ed, and promptly disconnect it when no longer necessary.
CAUTION:
wWork must be started after 90 seconds from the time the
ignition switch is turned to the ºLOCKº position and the
negative (±) terminal cable is disconnected from the
battery.
wTo avoid erasing the memory of each memory system,
never use a back±up power supply from outside the
vehicle.
Fitting Adjustments
When removing and installing body panels which have a pre-
load value, after installation refer to the page containing the
installation adjustment methods, and make adjustments ac-
cording to the required specifications.
HINT: When making adjustments, do not completely loosen
the bolts and nuts of the part being adjusted. Tighten them
appropriately, and move the panels by hand to align them. BO±2
± BODYGENERAL INFORMATION

SRS (Supplemental Restraint System)
The 1995 SUPRA is equipped with an SRS, such as the driver airbag and front passenger airbag assembly.
Failure to carry out service operations in the correct sequence could cause the SRS to deploy, possibly
leading to a serious accident.
When removing or installing of airbag parts and the yellow wire harness and connector for the airbag is
necessary, refer to the precautionary notices in the RS section before performing the operation.
wWork must be started after 90 seconds from the time the ignition switch is set to the LOCK position
and the negative (±) terminal cable is disconnected from the battery.
(The SRS is equipped with a back±up power source so that if work is started within 90 seconds of
disconnecting the negative (±) terminal cable of the battery, the SRS may deploy.)
wTo avoid erasing the memory of each memory system, never use a back±up power supply from
outside the vehicle.
wBefore repairs, remove the airbag sensors if shocks are likely to be applied to the sensors during
repairs.
wThe front airbag sensor set bolt has been anti±rust treated. When the sensor is removed, always
replace the set bolt with a new one.
wIf the front airbag sensors, center airbag sensor assembly, steering wheel pad or front passenger
airbag assembly have been dropped, or if there are cracks, dents or other defects in the case, bracket
or connector, replace them with new ones.
wNever use SRS parts from another vehicle. When replacing parts, replace them with new parts.
wDo not expose the front airbag sensors, center airbag sensor assembly, steering wheel pad or front
passenger airbag assembly directly to hot air or flames.
wThe SRS wire harness is integrated with the cowl wire harness assembly. The wires for the SRS wire
harness are encased in a yellow corrugated tube. All the connectors for the system are also a standard
yellow color. If the SRS wire harness becomes disconnected or the connector becomes broken due
to an accident, etc., repair or replace it. (See RS section)
wThe steering wheel must be fitted correctly to the steering column with the spiral cable at the neutral
position; otherwise, cable disconnection and other troubles may result. Refer to RS section of this
manual concerning correct steering wheel installation.
wWhen removing or handling the steering wheel pad or front passenger airbag assembly, it should be
placed with their top surface facing up. In this case, the twin±lock type connector lock lever should
be in the locked state and care should be taken to place it so the connector will not be damaged.
(Storing the pad with its metallic surface up, the front passenger airbag assembly with the airbag door
facing down may lead to a serious accident if the airbag inflates for some reason.)
wGrease should not be applied to the steering wheel pad or the front passenger airbag assembly, and
they should not be cleaned with detergents of any kind.
wStore the steering wheel pad or the front passenger airbag assembly where the ambient temperature
remains below 93°C (200°F), without high humidity and away from electrical noise.
wInformation labels are attached to the periphery of the SRS components. Follow the notices.
wWhen the ignition switch is at ACC or ON and the SRS warning light remains on, the center airbag
sensor assembly has detected a malfunction code. (See RS section)
± BODYGENERAL INFORMATIONBO±5

TRAC CONTROL SYSTEM BLEEDING
HINT: When repairing the brake master cylinder or TRAC sys-
tem, bleed the air out of the TRAC system.
1. INSPECT BATTERY POSITIVE VOLTAGE
Battery positive voltage:
10±14 V
2. BLEED TRACTION CONTROL SYSTEM
(a) Disconnect the connector from the TRAC pump.
(b) Connect SST to the TRAC pump.
SST 09990±00330
(c) Connect a vinyl tube to the bleeder plug of the TRAC
actuator, then loosen the bleeder plug.
(d) Start the engine.
(e) Connect the SST to the battery. Then wait at least 60
seconds before tightening the bleeder plug with the TRAC
pump still operating.
Torque: 8.3 NVm (85 kgfVcm, 74 in.Vlbf)
(f) After tightening the bleeder plug, keep the TRAC pump
operating for approximately 30 seconds.
(g) Install the cap.
3. CHECK FLUID LEVEL IN RESERVOIR
Fluid:
SAE J1703 or FMVSS NO. 116 DOT3
4. CLEAR DIAGNOSTIC TROUBLE CODES
(See page BR±127)
± BRAKE SYSTEMCHECK AND ADJUSTMENTBR±9

1. INSPECT BATTERY POSITIVE VOLTAGE
Battery positive voltage:
10±14 V
2. DISCONNECT CONNECTORS
(a) Disconnect the 2 connectors from the actuator.
(b) w/o TRAC:
Disconnect the 2 connectors from the control relay.
3. CONNECT ACTUATOR CHECKER (SST) TO ACTUATOR
(a) Connect the actuator checker (SST) to the actuator side wire
harnesses via the sub±wire harnesses (SST), as shown.
w/o TRAC:
SST 09990±00150, 09990±00200, and 09990±00210
w/ TRAC:
SST 09990±00150, 09990±00210, 09990±00250, and
09990±00280
(b) Connect the red cable of the checker to the battery positive
(+) terminal and the black cable to negative (±) terminal.
Connect the black cable of the sub±wire harnesses to the
battery negative (±) terminal or body ground.
SST 09990±00163
(c) Place ºSHEET Aº (SST) on the actuator checker.
± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)BR±45

BR±88.
BR±88
BR±92
BR±95
BR±97
BR±98
BR±100
BR±102
BR±104
CodeABS Warning Light
Blinking Pattern
Indicator
DiagnosisSee pageABS
Warning
LightTRAC
Indicator
LightTRAC
OFF
Light
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF*
OFF*
OFF*
OFF*
Always
ON
Open circuit in left front or right rear speed sensor
circuit
Open circuit in right front or left rear speed sensor
circuit
Low battery positive voltage or abnormally high
battery positive voltage
Open or short in lateral acceleration
sensor circuit
ABS pump motor is locked
Open in ABS pump motor ground
Brake fluid reservoir level low
Open circuit in TRAC pump motor circuit
TRAC ECU communication abnormal
Wheel speed sensor signal malfunction
Malfunction in ABS (& TRAC) ECU

: Only vehicles with TRAC
*: When a malfunction causing code No. 17, 18, 55, 58, 61 or 62 is detected, the ABS warning light does
not light up, but the TRAC indicator light does. However, when checking the DTC, check the blinking
pattern of the ABS warning light.
± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)BR±57

CIRCUIT INSPECTION
DTC 11 12 ABS Solenoid Relay Circuit
CIRCUIT DESCRIPTION
This relay supplies power to each ABS solenoid. After the ignition switch is turned ON, if the initial check is OK,
the relay goes on.
 
 DTC No.
 
 Diagnostic Trouble Code Detecting Condition
 
 Trouble area
 
 
 
 
 
11
 
 
 
 
 
Conditions (1) and (2) continue for 0.2 sec.
or more:
(1) ABS solenoid relay terminal (SR)
voltage: Battery positive voltage
(2) Solenoid relay monitor terminal (AST)
voltage: O V 
 
 
 
 

ABS solenoid relay

Open or short in ABS solenoid relay circuit

ECU
 
 
 
 
 
12
 
 
 
 
 
Conditions (1) and (2) continue for 0.2 sec.
or more:
(1) ABS solenoid relay terminal (SR)
voltage: O V
(2) Solenoid relay monitor terminal (AST)
voltage: Battery positive voltage 
 
 
 
 

ABS solenoid relay

B+ short in ABS solenoid relay circuit

ECU
Fail safe function: If trouble occurs in the solenoid relay circuit, the ECU cuts off current to the solenoid relay
and prohibits ABS control.
± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)BR±65

Check ABS solenoid relay.
Check for open and short in harness and connector between ABS sole-
noid relay and ABS ECU (See page IN±30).
Replace ABS control relay.
Repair or replace harness or connector.
Check continuity between each terminal of ABS
solenoid relay shown below.
(1) Apply battery voltage between terminals
(A9) 1 and (A8) 3.
(2) Check continuity between each terminal of
ABS solenoid relay shown below.
Terminals
Terminals
Terminals
1 and
5 and
2 and
Continuity
Continuity (Reference
value 80
)
Open
Terminals
Terminals
5 and
2 andContinuity
Open
 
 
 
If the same code is still output after the diagnostic trouble code is deleted, check the contact condi-
tion of each connection.
If the connections are normal, the ECU may be defective.
BR±68± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)