1997 TOYOTA SUPRA warning light

F03362
ABS ECU
Ts 8
*1*2
IJ1 DLC1
21 15
BR
EDTc E13
16
NORMAL ABS (2JZ-GE Engine)
SPORT ABS (2JZ-GTE Engine)
*1:
*2:
YY12 VA18A20
F00007lei-23-1-A
E1
Ts
DLC1
DI-496
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
724 Author
: Date
:
1997 SUPRA (RM502U)
Ts Terminal Circuit
CIRCUIT DESCRIPTION
The sensor check circuit detects abnormalities in the speed sensor signal which cannot be detected with
the DTC check.
Connecting terminals Ts and E1 of the DLC1 in the engine compartment starts the check.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check voltage between terminals Ts and E1 of DLC1.
PREPARATION:
Turn ignition switch ON.
CHECK:
Measure voltage between terminals Ts and E1 of DLC1.
OK:
Voltage: 10 - 14 V
OK If ABS warning light does not blink even after Ts
and E1 are connected, the ECU may be defec-
tive.
NG
DI4VN-01

BR5402
Throttle Control ECU
12V
FRO
FLO
RRO
RLO LG-B
O
Y-B
GR-R
Speed
Sensor FRO
FLO
RRO
RLO ABS ECU
16
T16
8
15
7 7
20
A20
A20
A206
9 A20T16
T16
T16
- DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
DI-539
767 Author
: Date
:
1997 SUPRA (RM502U)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
If the DTC is output from the ABS warning light, troubleshoot the ABS first.
1 Check for open and short in harness and connector between terminals FRO,
FLO, RRO, RLO of ABS ECU and throttle control ECU (See page IN-28).
NG Repair or replace harness or connector.
OK

F03400
J/B No.1
GAUGE 12
Throttle Control
ECU
WA ABS
Warning Light
Y L
L
L
L ABS ECU
12V
WA5 11
A20
IF2T5
T161E 42
T5
12
- DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
DI-545
773 Author
: Date
:
1997 SUPRA (RM502U)
DTC 81 ABS Control System Malfunction
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
81Engine speed is 500 rpm or more and ABS warning light is ON
for 12 sec. or more.
Wire harness and connector (WA circuit)

ABS ECU

Throttle control ECU
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check the DTC for the ABS (See page DI-501).
*1 Repair ABS control system according to the
code output.
*2
*1: Output NG code
*2: Malfunction indicator light remains ON
DI4W8-01

F03403
Throttle Control ECU
WT
12V
CSW
T16T16
6 10
LG-R LG-R
IF22
TRAC OFF Switch
(TRAC Control Switch)
LG
4 6 W-B
IG IEW-B W-BLG-R
13 OPA DLC2 J/B No.1
GAUGE
1E12
Y
T52TRAC OFF
Indicator
T58
LG-R
- DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
DI-547
775 Author
: Date
:
1997 SUPRA (RM502U)
TRAC OFF Indicator Light, TRAC OFF Switch Circuit
CIRCUIT DESCRIPTION
This is the TRAC control main switch. When the TRAC OFF switch is pushed on, TRAC control goes off and
the TRAC OFF indicator lights up. This indicator blinks for warnings when the trouble occurs and for display-
ing DTC.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check DTC.
Check DTC on page DI-501.
YES Repair circuit indicated by the code output.
NO
DI4W9-01

DI4WD-01
Vehicle Brought to Workshop
Customer Problem Analysis
Warning Light Check
DTC Check
DTC Chart
DI-560
Circuit Inspection
Remains on
Normal and Malfunction Code
Symptom Simulation
DTC Check
Identification of Problem
Warning Light Check
Confirmation Test
Warning Light ON
Warning Light Remains Off
END
Normal
Normal
1
2
3
4
7
Repair
85
6
Step
,:Diagnostic steps permitting the use
of the TOYOTA hand-held tester.3
6
DI-556
DI-557IN-18
DI-564 to DI-603 DI-557
DI-557
DI-557
Remains ON
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-555
783 Author
: Date
:
1997 SUPRA (RM502U)
SUPPLEMENTAL RESTRAINT SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
Perform troubleshooting in accordance with the procedure on the following pages.

DI4WE-01
Supplemental Restraint System Check Sheet
Date Problem Occurred
Customer 's Name
Registration No.
Registration Year
Frame No.
Odometer Reading
Weather
Temperature
Vehicle Operation
Road Conditions
Details Of Problem
Vehicle Inspection, Repair Histo-
ry
Prior to Occurrence of Mal-
function(Including Supplemental
Restraint System)
Diagnosis System Inspection
SRS Warning Light
Inspection
DTC Inspection1st Time
2nd Time
1st Time
2nd TimeInspector 's
Name
Fine Cloudy Rainy Snowy Other
Approx.
Starting Idling
Driving [ Constant speed Acceleration Deceleration
Other ]
Remains ON Sometimes Light Up Does Not Light Up
Remains ON Sometimes Light Up
Does Not Light Up
Normal Code Malfunction Code
Normal Code Malfunction Code[ Code. ]
[ Code. ]km
Miles //
//
// Date Vehicle Brought In
DI-556
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
784 Author
: Date
:
1997 SUPRA (RM502U)
CUSTOMER PROBLEM ANALYSIS CHECK

DI4WF-01
R06853
H03184
E1Tc
TcE
1
DLC 1
DLC 2
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-557
785 Author
: Date
:
1997 SUPRA (RM502U)
PRE-CHECK
1. CHECK SRS WARING LIGHT
(a) Turn the ignition switch to ACC or ON and check that the
SRS warning light lights up.
(b) Check that the SRS warning light goes out after approx.
6 seconds.
HINT:

When the ignition switch is at ACC or ON and the SRS
warning light remains on or flashes, the airbag sensor as-
sembly has detected a malfunction code.

If, after approx. 6 seconds have elapsed, the SRS warn-
ing light sometimes lights up or the SRS warning light
lights up even when the ignition switch is OFF, a short in
the SRS warning light circuit can be considered likely.
Proceed to ºSRS warning light system malfunctionº on
page DI-598, DI-600.
2. CHECK DTC (Using diagnosis check wire)
(a) Using diagnosis check wire, check the output of DTC.
(1) Turn the ignition switch to ACC or ON position and
wait approx. 20 seconds.
(2) Using SST, connect the terminals Tc and E
1 of the
DLC1.
HINT:
DTC check and troubleshooting of each DTC can also be done
using DLC2.
SST 09843-18020
NOTICE:
Never make a mistake with the terminal connection posi-
tion as this will cause a malfunction.

AT0716
Normal Code
ON
OFF0.25
0.25
AB0056
code 11 and 31
ON
OFF0.5
2.5
4.0
1.5
0.5
Code 11Code 31Repeat
H03217
DI-558
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
786 Author
: Date
:
1997 SUPRA (RM502U)
(b) Read the DTC.
Read the 2-digit DTC as indicated by the number of times
the SRS warning light blinks. As an example, the blinking
patterns, normal, 11 and 31 are as shown on the illustra-
tion.

Normal code indication
The light will blink 2 times per second.

Malfunction code indication
The first blinking output indicates the first digit of a
2-digit DTC. After a 1.5 second pause, the second
blinking output will indicate the second digit.
If there are 2 or more codes, there will be a 2.5 second pause
between each code. After all the codes have been output, there
will be a 4.0 second pause and they will all be repeated.
HINT:

In the event of a number of trouble codes, indication will
start from the smallest numbered code.

If it does not output a DTC or outputs a DTC without termi-
nal connection, proceed to the Tc terminal circuit inspec-
tion on page DI-603.
3. CHECK DTC (Using TOYOTA hand-held tester)
(a) Hook up the TOYOTA hand-held tester to the check con-
nector.
(b) Read the DTCs by following the prompts on the tester
screen.
HINT:
Please refer to the TOYOTA hand-held tester operator's manu-
al, for further details.
4. CLEAR DTC (Using diagnosis check wire)
When the ignition switch is turned off, the DTC is cleared.