TOYOTA SUPRA 1997 Service Repair Manual

DI7HM-01
W01411
1 2 3 4 5 6
7 8 9 10 11 121 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22 A18
A19
DI-450
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
678 Author
: Date
:
1997 SUPRA (RM502U)
TERMINALS OF ECU
NORMAL ABS (2JZ-GE Engine):
Symbols (Terminal No.)STD Voltage (V)Condition
IG1 (A18-2) - GND (A19-2,13)10 - 14IG switch ON
SR (A19-18) - R+ (A19-8)Below 1.5IG switch ON, ABS warning light OFF
MR (A19-7) - R+ (A19-8)10 - 14IG switch ON
SFRH (A19-4) - GND (A19-2,13)10 - 14IG switch ON, ABS warning light OFF
SFRR (A19-1) - GND (A19-2,13)10 - 14IG switch ON, ABS warning light OFF
SFLH (A19-10) - GND (A19-2,13)10 - 14IG switch ON, ABS warning light OFF
SFLR (A19-11) - GND (A19-2,13)10 - 14IG switch ON, ABS warning light OFF
SRR (A19-22) - GND (A19-2,13)10 - 14IG switch ON, ABS warning light OFF
SRH (A19-21) - GND (A19-2,13)10 - 14IG switch ON, ABS warning light OFF
AST (A19-16) - GND (A19-2,13)10 - 14IG switch ON, ABS warning light OFF
WA (A18 4) GND (A19 2 13)Below 2.0IG switch ON, ABS warning light ONWA (A18-4) - GND (A19-2,13)10 - 14IG switch ON, ABS warning light OFF
STP (A18 12) GND (A19 2 13)Below 1.5Stop light switch OFFSTP (A18-12) - GND (A19-2,13)8 - 14Stop light switch ON
D/G (A18-11) - GND (A19-2,13)10 - 14IG switch ON, ABS warning light OFF
MT (A19-9) - GND (A19-2,13)Below 1.5IG switch ON
Tc (A18-9) - GND (A19-2,13)10 - 14IG switch ON
Ts (A18-8) - GND (A19-2,13)10 - 14IG switch ON
FR+ (A19-3) - FR- (A19-14)AC generationIG switch ON
Slowly turn right front wheel
FL+ (A19-19) - FL- (A19-20)AC generationIG switch ON
Slowly turn left front wheel
RR+ (A18-1) - RR- (A18-7)AC generationIG switch ON
Slowly turn right rear wheel
RL+ (A18-3) - RL- (A18-10)AC generationIG switch ON
Slowly turn left rear wheel

W02803
1 2 3 4 5
6
7
8
9 10 11
121
2 3 4 5
6 7 8 9
10
11 12 13
14 15 16
17 18
19 20 21 22 A21
A20
23
24 25 26
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-451
679 Author
: Date
:
1997 SUPRA (RM502U)
Sport ABS (2JZ-GTE Engine):
Symbols (Terminal No.)STD Voltage (V)Condition
IG1 (A20-13) - GND (A20-12,25)10 - 14IG switch ON
SR (A21-7) - R+ (A20-26)10 - 14IG switch ON, ABS warning light OFF
MR (A21-1) - R+ (A20-26)Below 1.0IG switch ON
SFRH (A20-2) - GND (A20-12,25)10 - 14IG switch ON, ABS warning light OFF
SFRR (A20-1) - GND (A20-12,25)10 - 14IG switch ON, ABS warning light OFF
SFLH (A21-5) - GND (A20-12,25)10 - 14IG switch ON, ABS warning light OFF
SFLR (A21-6) - GND (A20-12,25)10 - 14IG switch ON, ABS warning light OFF
SRRH (A21-11) - GND (A20-12,25)10 - 14IG switch ON, ABS warning light OFF
SRRR (A21-12) - GND (A20-12,25)10 - 14IG switch ON, ABS warning light OFF
SRLH (A20-15) - GND (A20-12,25)10 - 14IG switch ON, ABS warning light OFF
SRLR (A20-14) - GND (A20-12,25)10 - 14IG switch ON, ABS warning light OFF
AST (A21-4) - GND (A20-12,25)10 - 14IG switch ON, ABS warning light OFF
WA (A20 11) GND (A20 12 25)Below 2.0IG switch ON, ABS warning light ONWA (A20-11) - GND (A20-12,25)10 - 14IG switch ON, ABS warning light OFF
STP (A20 5) GND (A20 12 25)Below 1.5Stop light switch OFFSTP (A20-5) - GND (A20-12,25)8 - 14Stop light switch ON
D/G (A20-24) - GND (A20-12,25)10 - 14IG switch ON, ABS warning light OFF
MT (A21-10) - GND (A20-12,25)Below 1.5IG switch ON
Tc (A20-8) - GND (A20-12,25)10 - 14IG switch ON
Ts (A20-21) - GND (A20-12,25)10 - 14IG switch ON
FR+ (A21-3) - FR- (A21-9)AC generationIG switch ON
Slowly turn right front wheel
FL+ (A21-8) - FL- (A21-2)AC generationIG switch ON
Slowly turn left front wheel
RR+ (A20-10) - RR- (A20-23)AC generationIG switch ON
Slowly turn right rear wheel
RL+ (A20-22) - RL- (A20-9)AC generationIG switch ON
Slowly turn left rear wheel
FRO (A20-7) - GND (A20-12,25)Pulse generationVehicle driving at about 30 km/h (19 mph)
FLO (A20-20) - GND (A20-12,25)Pulse generationVehicle driving at about 30 km/h (19 mph)
RRO (A20-6) - GND (A20-12,25)Pulse generationVehicle driving at about 30 km/h (19 mph)
RLO (A20-19) - GND (A20-12,25)Pulse generationVehicle driving at about 30 km/h (19 mph)
GL1 (A20-4) - GND (A20-12,25)0.5 - 4.5 VIG switch ON
GL2 (A20-16) - GND (A20-12,25)0.5 - 4.5 VIG switch ON
VGS (A20-3) - GND (A20-12,25)4.5 - 5.5 VIG switch ON

DI4VA-01
DI-452
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
680 Author
: Date
:
1997 SUPRA (RM502U)
PROBLEM SYMPTOMS TABLE
If a normal code is displayed during the DTC check but the problem still occurs, check the circuits for each
problem symptom in the order given in the table below and proceed to the relevant troubleshooting page.
NOTICE:
When removing the ECU, turn the IG switch OFF.
SymptomsInspection CircuitSee page
ABS does not operate.
Only when 1. - 4. are all normal and the problem is still occurring, replace the ABS
ECU.
1. Check the DTC, reconfirming that the normal code is output.
2. IG power source circuit.
3. Speed sensor circuit.
4. Check the ABS actuator with a checker.
If abnormal, check the hydraulic circuit for leakage (See page DI-498).
DI-442
DI-475
DI-469
BR-66 or XXX
ABS does not operate
efficiently.
Only when 1. - 4. are all normal and the problem is still occurring, replace the ABS
ECU.
1. Check the DTC, reconfirming that the normal code is output.
2. Speed sensor circuit.
3. Stop light switch circuit.
4. Check the ABS actuator with a checker.
If abnormal, check the hydraulic circuit for leakage (See page DI-498).
DI-442
DI-469
DI-482
BR-66 or BR-66
ABS warning light
abnormal.1. ABS warning light circuit.
2. ABS ECU.DI-488
DTC check cannot be done.
Only when 1. and 2. are all normal and the problem is still occurring, replace the
ABS ECU.
1. ABS warning light circuit.
2. Tc terminal circuit.
DI-488
DI-494
Speed sensor signal check
cannot be done.1. Ts terminal circuit.
2. ABS ECU.DI-496XXX

DI4VB-01
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-453
681 Author
: Date
:
1997 SUPRA (RM502U)
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.DTC Detecting ConditionTrouble Area
11
Conditions (1) and (2) continue for 0.2 sec. or more:
(1) ABS solenoid relay terminal (SR)
voltage: Below 1.5V
(2) Solenoid relay monitor terminal (AST)
voltage: 0 V

ABS solenoid relay

Open or short in ABS solenoid relay circuit
12
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: Battery positive voltage

ABS solenoid relay

B+ short in ABS solenoid relay circuit
Fail safe function:
If trouble occurs in the ABS solenoid relay circuit, the ECU cuts off current to the ABS solenoid relay and
prohibits ABS control.

F02626F02627
F02628
R/B
No.2
Battery
B
W-BW-BW-B
EAA6A6 A6
A6
A6 A9 A8 A9 A9A8 A8
A8
A9
IB6
IB6
IB6A19
A19
A19
2A 1
ALT
12
2ABS No.1
2RR1
2
6ABS Control Relay
4
3
1 Solenoid
Relay
DLC1 L-B
L-B V-WV-W VV7
8
18ABS ECU
MR
R+
SR
AST
MT 16
9
A19
A19Y-G
G-W 2
13
1
6 5
IB6
IB6 Y-G
G-W 5
3
ABS ActuatorABS ECU 5
4 2
2
L
L-W
Motor
Relay
R/B
No.2
ABS No.1 ALT
2A 11
11
22
2
Battery
B
RR/B No.5
ABS Solenoid
Relay
W-B5
5
555
5 1
2
354 6
DLC1 L-B L-B
V-W
V-W IB6
IB6 6
5 1
13
IB6
A21
A20
7
26
A214
Y-G
Y-GA65ABS ECU
L-WA64
ABS Actuator
EA
SR
R+ABS ECU 2JZ-GE Engine (NORMAL ABS):
2JZ-GTE Engine (SPORT ABS):R
AST DI-454
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
682 Author
: Date
:
1997 SUPRA (RM502U)
WIRING DIAGRAM

F02629F02630F02631
LOCK
A9
(+)
(-)
W02799
ABS Solenoid
Relay
ABS
Actuator
ECUA9
A6A6
A6A6
A19
16
5
4
5
4
5
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-455
683 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION PROCEDURE (2JZ-GE Engine)
1 Check voltage between terminals A9 - 2 and A9 - 6 of ABS control (solenoid)
relay connector.
PREPARATION:
Disconnect the ABS control (solenoid) relay connector.
CHECK:
Measure voltage between terminals A9 - 2 and A9 - 6 of ABS
control (solenoid) relay harness side connector.
OK:
Voltage: 10 - 14 V
NG Check and repair harness or connector.
OK
2 Check continuity between terminal A9 - 5 of ABS control (solenoid) relay con-
nector and terminal A19 - 16 of ABS ECU.
CHECK:
Check continuity between terminal A9 - 5 of ABS control (sole-
noid) relay connector and terminal A19 - 16 of ABS ECU.
OK:
Continuity
HINT:
There is a resistance of 26 ~ 40 W between terminals A6 - 4 and
A6 - 5 of ABS actuator.
NG Repair or replace harness or ABS actuator.
OK

F03349F02634F02635
Open
Continuity
Continuity
A8 A8 A9
Open
(+)
(-)
DI-456
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
684 Author
: Date
:
1997 SUPRA (RM502U)
3 Check 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 voltage between terminals A9 - 1 and A8
- 3.
(b) Check continuity between each terminal of ABS control
(solenoid) relay.
OK:
Terminals A9 - 5 and A9 - 6Open
Terminals A9 - 2 and A9 - 5Continuity
NG Replace ABS control relay.
OK
4 Check for open and short in harness and connector between ABS control
(solenoid) relay and ABS ECU (See page IN-28).
NG Repair or replace harness or connector.
OK
If the same code is still output a after the DTC is deleted, check the contact condition of each con-
nection.
If the connections are normal, the ECU may be defective.

F02629F02636F02637
LOCK
R/B No.5
(-)
(+)
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-457
685 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION PROCEDURE (2JZ-GTE Engine)
1 Check voltage between terminals 1 and 2 of R/B No.5 (for ABS solenoid relay).
PREPARATION:
Remove ABS solenoid relay from R/B No.5.
CHECK:
Measure voltage between terminals 1 and 2 of R/B No.5 (for
ABS solenoid relay).
OK:
Voltage: 10 - 14 V
NG Check and repair harness or connector.
OK

F02638
ABS Solenoid
Relay
ABS
Actuator
ECUA6
A6
A6A6
A21
5
434
5
4
DI-458
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
686 Author
: Date
:
1997 SUPRA (RM502U)
2 Check continuity between terminal 3 of R/B No.5 (for ABS solenoid relay) and
terminal A21 - 4 of ABS ECU.
CHECK:
Check continuity between terminal 3 of R/B No.5 (for ABS sole-
noid relay) and terminal A21 - 4 of ABS ECU.
OK:
Continuity
HINT:
There is a resistance of 26 ~ 40 W between terminals A6 - 4 and
A6 - 5 of ABS actuator.
NG Repair or replace harness or ABS actuator.
OK

F02639F02640F02641F02642
321
4 5
6
Open
Continuity
Continuity
Continuity
Open
(+) (-)
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-459
687 Author
: Date
:
1997 SUPRA (RM502U)
3 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
CHECK:
(a) Apply battery 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
NG Replace ABS control relay.
OK
4 Check for open and short in harness and connector between ABS solenoid relay
and ABS ECU (See page IN-28).
NG Repair or replace harness or connector.
OK
If the same code is still output after the DTC is deleted, check the contact condition of each con-
nection.
If the connections are normal, the ECU may be defective.