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 736 of 1807
FI6997
TOYOTA
Hand-held
tester
DLC2
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-445
673 Author: Date:
1997 SUPRA (RM502U)
(b) Using TOYOTA hand-held tester, check the DTC.
(1) Do step (1) - (6) on the previous page.
(2) Hook up the TOYOTA hand- held tester to the
DLC2.
(3) 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 farther details.
DTC of speed sensor check function:
Code No.DiagnosisTrouble Area
71Low output voltage of right front speed sensor
Right front speed sensor
Sensor installation
Sensor Rotor
72Low output voltage of left front speed sensor
Left front speed sensor
Sensor installation
Sensor Rotor
73Low output voltage of right rear speed sensor
Right rear speed sensor
Sensor installation
Sensor Rotor
74Low output voltage of left rear speed sensor
Left rear speed sensor
Sensor installation
Sensor Rotor
75Abnormal change in output voltage of right front speed sensorRight front speed sensor rotor
76Abnormal change in output voltage of left front speed sensorLeft front speed sensor rotor
77Abnormal change in output voltage of right rear speed sensorRight rear speed sensor rotor
78Abnormal change in output voltage of left rear speed sensorLeft rear speed sensor rotor
79*Deceleration sensor is faultyDeceleration sensor
Sensor installation
*: SPORT ABS (2JZ-GTE Engine) only
Page 737 of 1807
R10305
GL2
VGS
GGNDGL1
Rear Side
Front Side DI-446
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
674 Author: Date:
1997 SUPRA (RM502U)
3. DECELERATION SENSOR OPERATION DIAGNOSIS
SYSTEM
CAUTION:
While checking the deceleration sensor operating diagno-
sis system, the Anti-lock Brake System does not work and
brake system works as a conventional brake system.
(a) Deceleration sensor inspection check of deceleration
sensor output:
(1) Connect 3 dry batteries of 1.5 V in series.
(2) Connect VGS terminal to the batteries' positive (+)
terminal, and GGND terminal to the batteries' nega-
tive (-) terminal, apply about 4.5 V between VGS-
GGND terminals.
NOTICE:
Do not apply voltage of 6 V or more to terminals VGS and
GGND.
(3) Check the output of GL1 and GL2 terminals.
SymbolsConditionStandard Value
GL1Horizontalabout 2.3 V
GL1Lean forward0.4 - about 2.3 V
GL1Lean rearwardabout 2.3 V - 4.1 V
GL2Horizontalabout 2.3 V
GL2Lean forwardabout 2.3 V - 4.1 V
GL2Lean rearward0.4 - about 2.3 V
HINT:
If the senor is tilted too much it may show the wrong value.
If dropped, the sensor should be replaced with a new one.
The sensor removed from the vehicle should not be
placed upside down.
Page 738 of 1807
DI4V7-01
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-447
675 Author: Date:
1997 SUPRA (RM502U)
DIAGNOSTIC TROUBLE CODE CHART
If a malfunction code is displayed during the DTC check, check the circuit listed for that code. For details
of each code, turn to the page referred to under the ºSee pageº for the respective ºDTC No.º in the DTC chart.
HINT:
Using SST 09843-18020, connect the terminals Tc and E1, and remove the short pin.
If any abnormality is not found when inspect each inspection parts, inspect the ECU.
DTC No.
(See Page)Detection ItemTrouble Area
11
(DI-453)Open circuit in ABS solenoid relay circuitABS solenoid relay
Open or short in ABS solenoid relay circuit
12
(DI-453)Short circuit in ABS solenoid relay circuitABS solenoid relay
B+ short in ABS solenoid relay circuit
13*2
(DI-460)Open circuit in ABS motor relay circuitABS motor relay
Open or short in ABS motor relay circuit
14
(DI-460)Short circuit in ABS motor relay circuitABS motor relay
B+ short in ABS motor relay circuit
21
(DI-466)Open or short circuit in 2-position solenoid circuit for right front
wheelABS actuator
Open or short in SFRH or SFRR circuit
22
(DI-466)Open or short circuit in 2-position solenoid circuit for left front
wheelABS actuator
Open or short in SFLH or SFLR circuit
23
(DI-466)Open or short circuit in 2-position solenoid circuit for right rear
wheelABS actuator
Open or short in SRH (SRRH) or SRR (SRRR) circuit
24*1
(DI-466)
Open or short circuit in 2-position solenoid circuit for left rear
wheelABS actuator
Open or short in SRLH or SRLR circuit
31*2
(DI-469)Right front wheel speed sensor signal malfunction
32*2
(DI-469)Left front wheel speed sensor signal malfunctionRight front, left front, right rear and left rear speed sensor
O htihd iit33*2
(DI-469)Right rear wheel speed sensor signal malfunction
Open or short in each speed sensor circuit
Speed sensor rotor
34*2
(DI-469)Left rear wheel speed sensor signal malfunction
41
(DI-475)Low battery positive voltage
Battery
IC regulator
Open or short in power source circuit
43*1
(DI-479)
Malfunction in deceleration sensor
(constant output)Deceleration sensor
Wire harness for deceleration sensor system
44*1
(DI-480)Open or short in deceleration sensor circuitDeceleration sensor
Open or short in deceleration sensor circuit
45*1
(DI-479)Malfunction in deceleration sensorDeceleration sensor
Wire harness for deceleration sensor system
49
(DI-482)Open circuit in stop light switch circuitOpen in stop light circuit
51*2
(DI-484)
Pump motor is locked
Open in pump motor groundABS pump motor
Always
ON
(DI-485)Malfunction in ECU
IG power source circuitBattery
IC regulator
Open or short in power source circuit
Page 739 of 1807
DI-448
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
676 Author: Date:
1997 SUPRA (RM502U)
*1: Short ABS (2JZ-GTE Engine) only
*2: As DTC cannot be erased by replacing parts alone, do either of the following operations.
Clear DTC (See page DI-442).
At the vehicle speed of 20 km/h (12 mph), drive the vehicle for 30 sec. or more.
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
