Page 733 of 1807
DI4V6-01
F02620
R06980
Short Pin
DLC1
S-17-1 Iei-23-1-A
F00041
DLC2
Tc E 1DLC1
Tc E1
R01346
Normal Code
2 sec.
ON
OFF0.25
sec.
0.25
sec.
Code 11 and 21
0.5
sec.
4 sec.1.5
sec.2.5 sec.0.5
sec.
Code 21
Code 11 ON
OFF DI-442
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
670 Author: Date:
1997 SUPRA (RM502U)
PRE-CHECK
1. DIAGNOSIS SYSTEM
(a) Check the Indicator,
When the ignition switch is turned ON, check that the ABS
warning light goes on for 3 seconds.
HINT:
If the indicator check result is not normal, proceed to trouble-
shooting for the ABS warning light circuit (See page DI-488).
(b) Check the DTC.
(1) Turn the ignition switch ON.
(2) Disconnect the short pin from DLC1.
(3) Using SST, connect terminals Tc and E1 of DLC2 or
DLC1.
SST 09843-18020
(4) Read the DTC from the ABS warning light on the
combination meter.
HINT:
If no code appears, inspect the diagnostic circuit or ABS warn-
ing light circuit (See page DI-494 or DI-488).
As an example, the blinking patterns for normal code and
codes 11 and 21 are shown on the left.
(5) Codes are explained in the code table on page
DI-447.
(6) After completing the check, disconnect terminals Tc
and E1, and turn off the display.
If 2 or more malfunctions are indicated at the same time, the
lowest numbered DTC will be displayed 1st.
Page 734 of 1807
FI6997
TOYOTA
Hand-held
tester
DLC2
BR3890
R06980
Short Pin
DLC1
N09348
TOYOTA hand-held tester
ECU
TOYOTA brake-out-box
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-443
671 Author: Date:
1997 SUPRA (RM502U)
(c) Using TOYOTA hand-held tester, check the DTC.
(1) Hook up the TOYOTA hand- held tester to the
DLC2.
(2) Read the DTC by following the prompts on the tes-
ter screen.
Please refer to the TOYOTA hand-held tester oper-
ator 's manual for further details.
(d) Clear the DTC.
(1) Using SST, connect terminals Tc and E1 of DLC2 or
DLC1 and remove the short pin from DLC1.
SST 09843-18020
(2) IG switch ON.
(3) Clear the DTC stored in ECU by depressing the
brake pedal 8 or more times within 5 seconds.
(4) Check that the warning light shows the normal
code.
(5) Remove the SST from the terminals of DLC2 or
DLC1.
SST 09843-18020
(6) Connect the short pin to DLC1.
HINT:
Disconnecting the battery cable during repairs will not erase the
DTC in the ECU.
(e) Using TOYOTA brake-out-box and TOYOTA hand-held
tester, measure the ECU terminal values.
(1) Turn the IG switch OFF.
(2) Hook up the TOYOTA hand-held tester and TOYO-
TA break-out-box to the vehicle.
(3) Turn the IG switch ON.
(4) Read the ECU input/output values by following the
prompts on the tester screen.
HINT:
TOYOTA hand-held tester has a ºSnapshotº function.
This records the measured values and is effective in the diagno-
sis of intermittent problems.
Please refer to the TOYOTA hand-held tester/TOYOTA break-
out-box operator's manual for further details.
Page 735 of 1807
F00007
E1
Tc
Ts
lei-23-1-A
DLC1
BR3904
0.13 sec.
0.13 sec.
ON
OFF
BR3893
Malfunction Code (Example Code 72, 76)
7276
ON
OFF
0.5 sec.
0.5 sec.1.5 sec.
0.5 sec.0.5 sec.2.5 sec.
4 sec.
Repeat DI-444
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
672 Author: Date:
1997 SUPRA (RM502U)
2. SPEED SENSOR SIGNAL AND DECELERATION SEN-
SOR
(a) Check the speed sensor signal and deceleration sensor.
(1) Turn the ignition switch OFF
(2) Using SST, connect terminal Ts and E1 of DLC1.
SST 09843-18020
(3) Start the engine.
(4) Check that the ABS warning light blinks.
HINT:
If the ABS warning light does not blink, inspect the ABS
warning light circuit (See page DI-488).
If the ABS warning light is always on, inspect and repair,
deceleration sensor.
(5) Drive the vehicle faster than 45 km/h (28 mph) for
several seconds.
(6) Stop the vehicle.
(7) Using SST, connect terminals Tc an E1 of DLC1.
SST 09843-18020
(8) Read the number of blinks of the ABS warning light.
HINT:
See the list of DTC shown on the next page.
If every sensor is normal, a normal code is output (A cycle
of 0.25 sec. ON and 0.25 sec. OFF is repeated).
If 2 or more malfunctions are indicated at the same time,
the lowest numbered code will be displayed 1st.
(9) After doing the check, disconnect terminals Ts and
E1, Tc and E1 of DLC1, and turn ignition switch OFF.
Page 740 of 1807
DI4V8-01
W02807
2JZ-GE:
2JZ-GTE:
2JZ-GTE:SPORT AVS (2JZ-GTE Engine):
ABS Control
Relay
ABS Solenoid
Relay
ABS Motor RelayABS ActuatorDeceleration Sensor
ABS Warning Light
ABS ECU
DLC1DLC2
Front Speed Sensor RotorRear Speed SensorRear Speed
Sensor Rotor
Front Speed Sensor
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-449
677 Author: Date:
1997 SUPRA (RM502U)
PARTS LOCATION
Page 741 of 1807
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
Page 742 of 1807
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
Page 743 of 1807
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
Page 771 of 1807
F03338
Deceleration sensor
3
5
1
2
A23
A23
A23
A23B
W-B
W
R
G
W-B
IG IEA20
A20
A20
A20
3
16
4
17VGS
GL2
GL1
GGNDABS ECU DI-480
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
708 Author: Date:
1997 SUPRA (RM502U)
DTC 44 Deceleration Sensor Circuit
(SPORT ABS (2JZ-GTE Engine) only)
CIRCUIT DESCRIPTION
This sensor detects deceleration on the vehicle. The sensor signal is used in ABS control. If the sensor func-
tions abnormally, the ABS warning light comes on but the ABS still operates.
DTC No.DTC Detecting ConditionTrouble Area
44
Either of the following (1), (2) or (3) is detected:
(1) IG switch ON and output voltage of GL1 or GL2 remains
0.5 V or less or 4.5 V or more for more than 1.2 sec.
(2) At vehicle speed of 0 km/h, outputs of GL1 and GL2 re-
mains abnormally different for 60 sec. or more
(3) IG switch ON and VGS 4.4 V, VGS 5.5 V continues
for 1.2 sec. or more.
Deceleration sensor
Open or short in deceleration sensor circuit
WIRING DIAGRAM
DI4VH-01
