1995 TOYOTA SUPRA Service Repair Manual

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Page 945 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Remove motor relay from R/B No. 5.
Check continuity between each pair of terminals of
motor relay shown below.
Check ABS motor relay.
1. Apply battery voltage between terminals
3 and 4.
2. Check conti

Page 946 of 2543

TOYOTA SUPRA 1995 Service Repair Manual DTC 15 16 TRAC Solenoid Relay Circuit
CIRCUIT DESCRIPTION
This relay circuit supplies power to each traction actuator solenoid.
When the ignition switch is turned ON, the relay goes on.
D

Page 947 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Remove TRAC solenoid relay from R/B No. 5.
Measure voltage between terminals 1 and 2 of R/B
No. 5 (for TRAC Solenoid relay).
Voltage 10 Ð 14 V
Check voltage between terminals 1 and 2 of R/B No. 5 (fo

Page 948 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Check TRAC solenoid relay.
Remove TRAC solenoid relay from R/B No. 5.
Check continuity between each terminal of TRAC
solenoid relay shown below.
Replace TRAC solenoid relay.
Terminals 1 and 3Open
Con

Page 949 of 2543

TOYOTA SUPRA 1995 Service Repair Manual DTC 17 18 TRAC Motor Relay Circuit
CIRCUIT DESCRIPTION
This relay circuit supplies power to the TRAC pump motor. While the TRAC is activated, the ECU switches the
motor relay ON and operates the TRAC

Page 950 of 2543

TOYOTA SUPRA 1995 Service Repair Manual INSPECTION PROCEDURE
± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)BR±81
Check voltage between terminal 1 of R/B No. 5 (for TRAC motor relay)
and body ground.
Remove TRAC motor relay from R/B No. 5.
Me

Page 951 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Check TRAC motor relay.
Remove TRAC solenoid relay from R/B No. 5.
Check continuity between each terminal of TRAC
solenoid relay shown below.
Terminals 1 and 2
Open
Continuity
(Reference value 62�)T

Page 952 of 2543

TOYOTA SUPRA 1995 Service Repair Manual DTC 21 22 23 24 ABS Actuator Solenoid Circuit
CIRCUIT DESCRIPTION
This solenoid goes on when signals are received from the ECU and controls the fluid pressure acting on the
brake cylinders, thus contr

DTC 21 22 23 24 ABS Actuator Solenoid Circuit
CIRCUIT DESCRIPTION
This solenoid goes on when signals are received from the ECU and controls the fluid pressure acting on the
brake cylinders, thus controlling the braking force.
DTC No. Diagnostic Trouble Code Detecting Condition Trouble area

21

Conditions (1) through (3) continue for 0.05
sec. or more:
(1) ABS solenoid relay terminal (SR)
voltage: Battery positive voltage
(2) Voltage of ABS (& TRAC) ECU terminal
AST: Battery positive voltage
(3) When power transistor of ECU is ON,
voltage of terminal SFR is 0 V or battery
positive voltage.

ABS actuator
Open or short in SFR circuit.
ECU

22

Conditions (1) through (3) continue for 0.05
sec. or more:
(1) ABS solenoid relay terminal (SR)
voltage: Battery positive voltage
(2) Voltage of ABS (& TRAC) ECU terminal
AST: Battery positive voltage
(3) When power transistor of ECU is ON,
voltage of terminal SFL is 0 V or battery
positive voltage.

ABS actuator
Open or short in SFL circuit.
ECU

23

Conditions (1) through (3) continue for 0.05
sec. or more:
(1) ABS solenoid relay terminal (SR)
voltage: Battery positive voltage
(2) Voltage of ABS (& TRAC) ECU terminal
AST: Battery positive voltage
(3) When power transistor of ECU is ON,
voltage of terminal SRR is 0 V or battery
positive voltage.

ABS actuator
Open or short in SRR circuit.
ECU

24

Conditions (1) through (3) continue for 0.05
sec. or more:
(1) ABS solenoid relay terminal (SR)
voltage: Battery positive voltage
(2) Voltage of ABS (& TRAC) ECU terminal
AST: Battery positive voltage
(3) When power transistor of ECU is ON,
voltage of terminal SRL is 0 V or battery
positive voltage.

ABS actuator
Open or short in SRL circuit.
ECU
Fail safe function: If trouble occurs in the actuator solenoid circuit, the ECU cuts off current to the solenoid relay
and prohibits ABS control.
± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)BR±83

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