1997 TOYOTA SUPRA warning light

DI-486
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
714 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION PROCEDURE
1 Is DTC output?
Check DTC on page DI-442.
YES Repair circuit indicated by the code output.
NO
2 Is normal code displayed?
YES Check ABS solenoid relay. Check for short in
harness and connector between ABS solenoid
relay and DLC1 (See page IN-28).
NO
3 Is ABS warning light go off?
YES Check for open or short in harness and conec-
tor between ECU-IG Fuse and ECU
(See page IN-28).
NO
4 Check battery positive voltage.
PREPARATION:
Start the engine.
CHECK:
Check the battery positive voltage.
OK:
Voltage: 10 - 16 V
NG Check and repair the charging system.
OK

- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-487
715 Author
: Date
:
1997 SUPRA (RM502U)
5 Check ABS warning light.
PREPARATION:
(a) Turn the ignition switch OFF.
(b) Disconnect the conector from the ABS ECU.
(c) Turn the ignition switch ON.
CHECK:
Check the ABS warning light goes off.
OK Check and replace ABS ECU.
NG
Check for short in harness and connector between combination meter and ABS ECU, combina-
tion meter and DLC1 (See page IN-28).

F03346F03347F03348
2JZ-GE Engine (NORMAL ABS):
2JZ-GTE Engine (SPORT ABS):Battery
ABS Control RelayJ/B No.1
(Motor
Relay)
(Solenoid
Relay)
W-B
1
2
6
A9
4
3
1
4
A9B-R
EA1
6
23 B-R
22
DLC1 Short Pin
L16
IJ1
A18
4
LLL
IF212
L42
ABS
Warning
Light
Y
GAUGE
ABS ECU1J1E
512
25
ABS ActuatorABS ECU
12 V
WA
EA
Battery
R/B No.5
ABS
Solenoid Relay15
5
5555 26
4
5 3
W-B
EA
ABS Actuator
B-R
EA16
23 B-R
Short Pin
DLC1
22L16
IJ1L
L
L11A20WA12 V ABS ECU
ABS
Warning
Light
L4
IF212
2 Y
GAUGE J/B No.1
1J
1E
12 5
ABS & TRAC
ECU DI-488
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
716 Author
: Date
:
1997 SUPRA (RM502U)
ABS Warning Light Circuit
CIRCUIT DESCRIPTION
If the ECU detects trouble, it lights the ABS warning light while at the same time prohibiting ABS control. At
this time, the ECU records a DTC in memory.
After removing the short pin of the DLC1, connect terminals Tc and E1 of the DLC1 or DLC2 to make the
ABS warning light to blink and output the DTC.
WIRING DIAGRAM
DI4VL-01

F02629F03349F03350
LOCK
Open
ContinuityA8A9
Continuity
F02629F03351F03352
OpenContinuity
A8 A9
(+)
(-) LOCK
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-489
717 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION PROCEDURE
2JZ-GE Engine:
Troubleshooting 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 control (solenoid) relay.
PREPARATION:
Disconnect the connectors from ABS control (solenoid) relay.
CHECK:
Check continuity between each terminal of ABS control (sole-
noid) relay.
OK:
Terminals A9 - 1 and A8 - 3Continuity (Reference value 80 W)
Terminals A9 - 5 and A9 - 6Continuity
Terminals A9 - 2 and A9 - 5Open
CHECK:
(a) Apply battery positive voltage between terminals A9 - 1
and A8 - 3.
(b) Check continuity between each terminal of ABS solenoid
relay.
OK:
Terminals A9 - 5 and A9 - 6Open
Terminals A9 - 2 and A9 - 5Continuity

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

- 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