TOYOTA SUPRA 1997 Service Repair Manual

F02629F03353F03354
LOCK
(+)
(-)A9
DI-490
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
718 Author
: Date
:
1997 SUPRA (RM502U)
CHECK:
Connect the
test lead to terminal A9 - 4 and the  lead to
terminal A9 - 5. Check continuity between terminals.
OK:
Continuity
If there is no continuity, connect the  test lead to terminal A9
- 4 and the
lead to terminal A9 - 5. Recheck continuity be-
tween terminals.
NG Replace ABS control relay.
OK
Repair or replace and check for open in harness and connector between DLC1 and ABS control
(solenoid) relay and body ground (See page IN-28).
3 Is DTC output?
Check DTC on page DI-442.
YES Repair circuit indicated by the code output.
NO
4 Does ABS warning light go off if short pin is removed?
NO Check for short in harness and connector be-
tween warning light and DLC1 and ECU (See
page IN-28).
YES

F02629F03355
F03356
LOCK
Open
Continuity
Continuity
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-491
719 Author
: Date
:
1997 SUPRA (RM502U)
5 Check ABS control (solenoid) relay (See step No.2).
NG Replace ABS control relay.
OK
Repair or replace and check for short in harness and connector between DLC1 and ABS control
(solenoid) relay (See page IN-18).
2JZ-GTE Engine:
Troubleshoot in accordance with the chart below for each trouble symptom.
ABS warning light does not light upGo to step 1
ABS warning light remains onGo to step 3
1 Check ABS warning light.
See combination meter troubleshooting on page BE-2.
NG Replace bulb or combination meter assembly.
OK
2 Check ABS solenoid relay.
PREPARATION:
Remove solenoid relay from R/B No.5.
CHECK:
Check continuity between each terminal of ABS solenoid relay.
OK:
Terminals 4 and 6Continuity (Reference value 80 W)
Terminals 2 and 3Continuity
Terminals 1 and 3Open

F02629F03357F03358
LOCK
OpenContinuity
(-) (+)
F02629F03359F03360
LOCK
(-)
(+)
64 1 2
DI-492
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
720 Author
: Date
:
1997 SUPRA (RM502U)
CHECK:
(a) Apply battery positive voltage between terminals 4 and 6.
(b) Check continuity between each terminal of ABS solenoid
relay.
OK:
Terminals 2 and 3Open
Terminals 1 and 3Continuity
CHECK:
Connect the
test lead to terminal 5 and the  lead to terminal
3. Check continuity between the terminals.
OK:
Continuity
If there is not continuity, connect the  test lead to terminal 5
and the
lead to terminal 3. Recheck continuity between ter-
minals.
NG Replace ABS solenoid relay.
OK
Repair or replace and check for open in harness and connector between DLC1 and ABS solenoid
relay and body ground (See page IN-28).
3 Is DTC output?
Check DTC on page DI-442.
YES Repair circuit indicated by the code output.
NO

- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-493
721 Author
: Date
:
1997 SUPRA (RM502U)
4 Does ABS warning light go off if short pin is removed?
NO Check for short in harness and connector be-
tween warning light and DLC1 and ECU (See
page IN-28).
YES
5 Check ABS solenoid relay (See step No.2).
NG Replace ABS control relay.
OK
Repair or replace and check for short in harness and connector between DLC1 and ABS solenoid
relay (See page IN-28).

F03361
ABS ECU
12 V
Tc
A20 A1998
*1 *2
R
R
R
IF1
11
P-B
II1 DLC1
R
*121*2P-B R
*1
*2
DLC2
11 Tc E
13
BR
BR BR
ED
IJ1 18BR
Tc E
134
NORMAL ABS (2JZ-GE Engine)
SPORT ABS (2JZ-GTE Engine)
*1:
*2:
S-17-1 Iei-23-1-A
F00041
DLC2
DLC1
E1Tc
E1
Tc
DI-494
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
722 Author
: Date
:
1997 SUPRA (RM502U)
Tc Terminal Circuit
CIRCUIT DESCRIPTION
Connecting terminals Tc and E1 of the DLC1 or the DLC1 or the DLC2 causes the ECU to display the DTC
by flashing the ABS warning light.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check voltage between terminals Tc and E1 of DLC2 or DLC1.
PREPARATION:
Turn ignition switch ON.
CHECK:
Measure voltage between terminals Tc and E1 of DLC2 or
DLC1.
OK:
Voltage: 10 - 14 V
OK If ABS warning light does not blink even after Tc
and E1 are connected, the ECU may be defec-
tive.
NG
DI4VM-01

- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-495
723 Author
: Date
:
1997 SUPRA (RM502U)
2 Check for open and short in harness and connector between ABS ECU and
DLC2 or DLC1, DLC2 or DLC1 and body ground (See page IN-28).
NG Repair or replace harness or connector.
OK
Check and replace ABS ECU.

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

- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-497
725 Author
: Date
:
1997 SUPRA (RM502U)
2 Check for open and short in harness and connector between ABS ECU and
DLC1, DLC1 and body ground (See page IN-28).
NG Repair or replace harness or connector.
OK
Check and replace ABS ECU.

F03363
DI-498
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
726 Author
: Date
:
1997 SUPRA (RM502U)
Check for Fluid Leakage
Check for fluid leakage from actuators or hydraulic lines.
DI4VO-01

DI4VP-01
Vehicle Brought to Workshop
Customer Problem Analysis
P. DI-500
Check and Clear DTC (Precheck)
P. DI-501Items inside
are titles of pages in this manual,
with the page number in the bottom portion. See
the pages for detailed explanations.
Problem Symptom ConfirmationSymptom Simulation
P. IN-18
Symptom
does not occur
Symptom
occurs
DTC Check
P.DI-501
Sensor CheckCircuit Inspection
DTC Chart
P. DI-503 Malfunction codeProblem Symptoms Chart
P. DI-508
Identification of Problem
Normal code
Repair
Confirmation Test
End
1
2
3
4
5
67
89
10
11
Step 9:
Diagnostic steps permitting the use of the
TOYOTA hand-held tester.
P DI-509 - DI-553
- DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
DI-499
727 Author
: Date
:
1997 SUPRA (RM502U)
ABS & TRACTION CONTROL SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
Troubleshooting in accordance with the procedure on the following pages.