1997 TOYOTA SUPRA warning light

N08130
Z07427
Ignition
Switch
BatteryWarning Light
N08958
32
1 270° BE-50
- BODY ELECTRICALCOMBINATION METER
2028 Author
: Date
:
1997 SUPRA (RM502U)
23. INSPECT DOOR COURTESY SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
ON (SW pin released)1 - 2, 2 - 3Continuity
OFF
(SW pin pushed in)-No continuity
If continuity is not as specified, replace the switch.
24. INSPECT OPEN DOOR WARNING LIGHT
Disconnect the connector from the door courtesy switch,
ground terminal 1 on the wire harness side connector and
check that the warning light lights up.
If the warning light does not light up, inspect the bulb or wire har-
ness.
25. INSPECT LIGHT CONTROL RHEOSTAT
(a) Connect the positive (+) lead from the battery to terminal
1 and negative lead (-) to terminal 3.
(b) Connect the positive (+) lead from the voltmeter to termi-
nal 2 and negative lead to terminal 3.
(c) Turn the rheostat knob and check that the voltage
changes.

Steering Wheel Pad
(with Airbag) Junction Block No. 1Center Airbag Sensor Assembly Front Airbag Sensor LHFront Passenger Airbag Assembly Front Airbag Sensor RHSRS Warning Light
Spiral Cable
Locations of SRS Components
HANDLING PRECAUTIONS ON RELATED COMPONENTS
1. SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Servicing vehicle with a Supplemental Restraint System (referrerd to as the SRS in the remainder of this
manual) installed.
When handling SRS components (removal, installation or inspection, etc.), always follow the directions
given in the repair manual for the relevant model year to prevent the occurrence of accidents and airbag
malfunction.
Also take the following precautions when repairing the body:

Work must be started after 90 seconds or longer from the time the ignition switch is set to the LOCK
position and the negative (-) terminal cable is disconnected from the battery.
(The airbag system is equipped with a backup power source so that if work is started within 20 seconds
of disconnecting the negative (-) terminal cable of the battery, the airbag may be deployed.)
When the negative (-) terminal cable is disconnected from the battery, memory of the clock and audio
systems will be cancelled. So before starting work, make a record of the contents memorized by each
memory system. Then when work is finished, reset the clock and audio systems as before.
When the vehicle has tilt and telescopic steering, power seat, outside rear view mirror and power shoul-
der belt anchorage, which are all equipped with memory function, it is not possible to make a record of
the memory contents. So when the operation is finished, it will be necessary to explain this fact to the
customer, and request the customer to adjust the features and reset the memory.

When using electric welding, first disconnect the SRS connector (yellow color and 2 pins) under the
steering column near the combination switch connector on the glove compartment finish plate and lower
the front scuff plate before starting work.
INTRODUCTIONIN-6

FOR THE TOYOTA DEALER
COLLISION REPAIR INFORMATION
TITLE: SRS AIRBAG COMPONENT REPLACEMENT PAGE 1 of 6
SECTION: ELECTRICAL BULLETIN #79
MODELS: ALL
DATE: AUGUST 1997
After an airbag has been deployed during a collision, it will be necessary to replace certain
components of the airbag system. Technicians can identify these parts by using the
attached matrix.
If the airbag does not deploy, yet the combination meter (airbag warning light) stays on for
more that 10 seconds after the key is turned to the ªACCº or ªONº position, it is necessary
to perform a diagnostic test. Always refer to the Toyota repair manual for the correct repair
procedure.
The attached information includes:

A matrix indicating components requiring replacement (pages 2±4).

Parts replacement note (page 5).

An example repair manual page outlining the diagnostic procedure available in
each model specific repair manual (page 6).
Toyota recommends the use of electrical repair kit (P/N 00002±04200±01) for any wiring
repairs. This kit includes a selection of numerous repair connectors, terminal ends, a repair
procedures manual and special tools specific to Toyota. The
replacement electrical wire
and connector (from the wire harness to the front sensors) is P/N 82988±24010.
Toyota also offers a video package which shows the operation of the SRS airbag system
(P/N 00401±42994).
CAUTION: SRS Airbag service work can be performed only AFTER 90 SECONDS
from the time the ignition switch is turned to the ªlockº position and the
negative (±) terminal cable is disconnected from the battery.
NOTE: PLEASE ROUTE THIS BULLETIN TO YOUR COLLISION REPAIR CENTER
MANAGER!

FOR THE TOYOTA DEALER
COLLISION REPAIR INFORMATION
TITLE: SRS AIRBAG COMPONENT REPLACEMENT PAGE 1 of 4
SECTION: ELECTRICAL BULLETIN #83
MODELS: ALL
DATE: MAY 1998
After an airbag has been deployed during a collision, it will be necessary to replace certain
components of the SRS system. Technicians can identify these parts by using the attached
matrix.
If, after the vehicle has been completely repaired, the airbag warning light stays on for
more than 6 seconds while the key is turned to the ªACCº or ªONº position, it is necessary
to perform a diagnostic test. Always refer to the model±specific Toyota Repair Manual for
the correct repair procedure.
The attached information includes:

A matrix indicating components requiring replacement (page 3).

Parts replacement notes (page 4).

An example Repair Manual page outlining the diagnostic procedure available in
each model±specific Repair Manual (page 2).
On some vehicles the front sensors may be replaced. Please refer to the model±specific
repair manual concerning front airbag sensor replacement requirements before performing
this repair. Three part numbers are available for
replacement electrical wire and
connectors from the wire harness to the front SRS sensors. They are P/N 82988±24010,
82988±50010, and 82988±33010.
Toyota also offers a video package which outlines the operation of the SRS airbag system
(P/N 00401±42994).
NOTE: PLEASE ROUTE THIS BULLETIN TO YOUR COLLISION REPAIR CENTER
MANAGER!

FOR THE TOYOTA DEALER
COLLISION REPAIR INFORMATION
TITLE: SRS AIRBAG COMPONENT REPLACEMENT PAGE 1 of 6
SECTION: ELECTRICAL BULLETIN #79
MODELS: ALL
DATE: AUGUST 1997
After an airbag has been deployed during a collision, it will be necessary to replace certain
components of the airbag system. Technicians can identify these parts by using the
attached matrix.
If the airbag does not deploy, yet the combination meter (airbag warning light) stays on for
more that 10 seconds after the key is turned to the ªACCº or ªONº position, it is necessary
to perform a diagnostic test. Always refer to the Toyota repair manual for the correct repair
procedure.
The attached information includes:

A matrix indicating components requiring replacement (pages 2±4).

Parts replacement note (page 5).

An example repair manual page outlining the diagnostic procedure available in
each model specific repair manual (page 6).
Toyota recommends the use of electrical repair kit (P/N 00002±04200±01) for any wiring
repairs. This kit includes a selection of numerous repair connectors, terminal ends, a repair
procedures manual and special tools specific to Toyota. The
replacement electrical wire
and connector (from the wire harness to the front sensors) is P/N 82988±24010.
Toyota also offers a video package which shows the operation of the SRS airbag system
(P/N 00401±42994).
CAUTION: SRS Airbag service work can be performed only AFTER 90 SECONDS
from the time the ignition switch is turned to the ªlockº position and the
negative (±) terminal cable is disconnected from the battery.
NOTE: PLEASE ROUTE THIS BULLETIN TO YOUR COLLISION REPAIR CENTER
MANAGER!

- DIAGNOSTICSENGINE (2JZ-GTE)
DI-167
395 Author
: Date
:
1997 SUPRA (RM502U) ISC4 (B32) - E01 (B80)
R-G e BRIdling, When A/C Switch ON or OFFPulse generation
(See page DI-240)
OX1 (B48) - E1 (B69)W e BRMaintain engine speed at 2,500 rpm for 2 min. after warning upPulse generation
(See page DI-193)
OXS (B47) - E1 (B69)R-L e BRMaintain engine speed at 2,500 rpm for 2 min. after warning upPulse generation
(See page DI-193)
HT1 (B71) E01 (B80)BLBRIdling after warning upBelow 3.0HT1 (B71) - E01 (B80)B-L e BRIG switch ON9 - 14
HTS (B72) E01 (B80)BR WBRIdling after warning upBelow 3.0HTS (B72) - E01 (B80)BR-W e BRIG switch ON9 - 14
KNK1 (B50) - E1 (B69)W e BRIdlingPulse generation
(See page DI-212)
KNK2 (B49) - E1 (B69)W e BRIdlingPulse generation
(See page DI-212)
NSW (B76) E1 (B69)BWBR
IG switch ON
Other shift position in ºPº or ºNº position9 - 14
NSW (B76) - E1 (B69)B-W e BRIG switch ON
Shift position in ºPº or ºNº position0 - 3.0
SPD (A2) - E1 (B69)P e BRIG switch ON
Rotate driving wheel slowlyPulse generation
(See page DI-238)
TE1 (A20) - E1 (B69)L e BRIG switch ON9 - 14
W (A6) E1 (B69)LBBRIdling9 - 14W (A6) - E1 (B69)L-B e BRIG switch ON0 - 3.0
OD1 (A12) - E1 (B69)BR-B e BRIG switch ON9 - 14
AC1 (A34) E1 (B69)LRBRA/C switch ON (At idling)0 - 1.5AC1 (A34) - E1 (B69)L-R e BRA/C switch OFF7.5 - 14
ACMG (A23) E01 (B80)WGBRA/C switch ON (At idling)0 - 3.0ACMG (A23) - E01 (B80)W-G e BRA/C switch OFF9 - 14
FPU (B73) E01 (B80)WLBRIG switch ON9 - 14FPU (B73) - E01 (B80)W-L e BRRestarting at high engine coolant temp.Below 2.0
ELS (A15) E1 (B69)RYBRDefogger switch or taillight switch ON7.5 - 14ELS (A15) - E1 (B69)R-Y e BRDefogger switch and taillight switch OFF-0.1 - 1.5
SDL (A8) - E1 (B69)G e BRDuring transmissionPulse generation
VSV1 (B40) E1 (B69)GBBRImmediately after racingBelow 3.0VSV1 (B40) - E1 (B69)G-B e BRIdling9 - 14
VSV2 (B39) E1 (B69)GYBRFor 2 sec. after IG switch ON to OFFBelow 3.0VSV2 (B39) - E1 (B69)G-Y e BRIdling9 - 14
VSV3 (B38) - E1 (B69)B-Y e BRIdling9 - 14
VSV4 (B60) - E1 (B69)L-W e BR
Idling and other shift position ºPº or ºNº position (for A/T).
Idling (for M/T)Below 3.0VSV4 (B60) E1 (B69)LW e BR
Idling and shift position ºPº or ºNº position (for A/T)9 - 14
IG switch ON2.3 - 3.0
PIM1 (B62) - E2 (B65)B-Y e W-BIG switch ON and apply vacuum 26.7 kPa
(200 mm Hg, 7.9 in. Hg)1.0 - 1.5
EFI+ (A27) - E2 (B65)B e W-BIG switch ONPulse generation
(See page DI-285)
EFI- (A26) - E2 (B65)W e W-BIG switch ONPulse generation
(See page DI-285)

- DIAGNOSTICSENGINE (2JZ-GTE)
DI-201
429 Author
: Date
:
1997 SUPRA (RM502U)
DTC P0171 System too Lean (Fuel Trim)
DTC P0172 System too Rich (Fuel Trim)
CIRCUIT DESCRIPTION
ºFuel trimº refers to the feedback compensation value compared against the basic injection time. Fuel trim
includes short-term fuel trim and long-term fuel trim.
ºShort-term fuel trimº is the short-term fuel compensation used to maintain the air-fuel ratio at its ideal
theoretical value. The signal from the heated oxygen sensor indicates whether the air-fuel ratio is RICH or
LEAN compared to the ideal theoretical value, triggering a reduction in fuel volume if the air-fuel ratio is rich,
and an increase in fuel volume if it is lean.
ºLong-term fuel trimº is overall fuel compensation carried out long-term to compensate for continual devi-
ation of the short-term fuel trim from the central value due to individual engine differences, wear over time
and changes in the usage environment.
If both the short-term fuel trim and long-term fuel trim are LEAN or RICH beyond a certain value, it is de-
tected as a malfunction and the MIL lights up.
DTC No.DTC Detecting ConditionTrouble Area
P0171
When the air fuel ratio feedback is stable after engine warning
up, the fuel trim is considerably in error on the RICH side
(2 trip detection logic)

Air intake (hose loose)

Fuel line pressure

Injector blockage

Heated oxygen sensor malfunction

Mass air flow meter

Engine coolant temp. sensor
P0172
When the air fuel ratio feedback is stable after engine warning
up, the fuel trim is considerably in error on the LEAN side
(2 trip detection logic)

Fuel line pressure

Injector blockage, leak

Heated oxygen sensor malfunction

Mass air flow meter

Engine coolant temp. sensor
HINT:

When DTC P0171 is recorded, the actual air-fuel ratio is on the LEAN side. When DTC P0172 is re-
corded, the actual air-fuel ratio is on the RICH side.

If the vehicle runs out of fuel, the air-fuel ratio is LEAN and DTC P0171 is recorded. The MIL then
comes on.

If the total of the short-term fuel trim value and long-term fuel trim value is within ± 35 %, the system
is functioning normally.
INSPECTION PROCEDURE
1 Check air induction system (See page SF-1).
NG Repair or replace.
OK
DI4SY-01

DI4V5-01
ABS Check Sheet
Inspector 's
Name:
Customer 's Name
Date Vehicle
Brought InRegistration Year Registration No.
Frame No.
Odometer Reading/ /
/ /
Date Problem First Occurred
Frequency Problem Occurs/ /
ContinuousIntermittent ( times a day)
Remains ONDoes not Light Up
Symptomskm
miles
ABS does not operate.
ABS Warning Light
AbnormalABS does not operate efficiently.
Check ItemTRAC Indicator
LightNormalDoes not Light Up
2nd TimeNormal Code
Malfunction Code (Code )
Normal CodeMalfunction Code (Code )
1st Time
DTC Check
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-441
669 Author
: Date
:
1997 SUPRA (RM502U)
CUSTOMER PROBLEM ANALYSIS CHECK