TOYOTA SUPRA 1995 Service Repair Manual

Tc Terminal Circuit
CIRCUIT DESCRIPTION
Connecting terminals Tc and E1 of the DLC1 or the DLC2 causes the ECU to display the diagnostic
trouble code by flashing the ABS warning light. BR±112
± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)

Check for open and short in harness and connector of systems connected
to Tc terminal (See page IN±30).
Turn ignition switch ON.
Measure voltage between terminals Tc and E1 of DLC2
or DLC1.
Voltage: 10 ± 14 V
If ABS warning light does not blink even
after Tc and E1 are connected, the ECU may
be defective.
Repair or replace harness or connector.
Check or replace ABS (& TRAC) ECU.
INSPECTION PROCEDURE.
± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)BR±113

Ts Terminal Circuit
CIRCUIT DESCRIPTION
The sensor check circuit detects abnormalities in the speed sensor signal which cannot be detected with the
diagnostic trouble code check.
Connecting terminals Ts and E1 of the DLC1 in the engine compartment starts the check.
Check for open and short in harness and connector between ABS (&TRAC)
ECU and DLC1, DLC1 and body ground (See page IN±30).
Turn ignition switch ON.
Measure voltage between terminals Ts and E1 of
DLC1.
Voltage: 10 ± 14 V
If ABS warning light does not blink even
after Ts and E1 are connected, the ECU may
be defective.
Repair or replace harness or connector.
Check and replace ABS (& TRAC) ECU.
INSPECTION PROCEDURE.
BR±114± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)

Check for Fluid Leakage
± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)BR±115

TRACTION CONTROL SYSTEM
(TRAC)
TRAC PUMP
COMPONENTS
BR±116± BRAKE SYSTEMTRACTION CONTROL SYSTEM (TRAC)

± BRAKE SYSTEMTRACTION CONTROL SYSTEM (TRAC)BR±117

TRAC PUMP REMOVAL
Installation is in the reverse order of removal.
AFTER INSTALLATION, BLEED BRAKE SYSTEM
(See page BR±7) AND BLEED TRAC SYSTEM (See page
BR±9)
1. REMOVE TRAC ACTUATOR
(See page BR±121)
2. REMOVE BRAKE MASTER CYLINDER
(See page BR±11)
3. DISCONNECT BRAKE LINE
Using SST, disconnect the brake line from the damper.
SST 09023±00100
Torque: 15 NVm (155 kgfVcm, 11 ftVlbf)
4. REMOVE TRAC PUMP ASSEMBLY
Remove the bolt, 2 nuts and TRAC pump assembly.
Torque: 19 NVm (195 kgfVcm, 14 ftVlbf)
5. REMOVE PRESSURE HOSE
Remove the 2 union bolts, 4 O±rings and pressure hose.
Torque: 46 NVm (465 kgfVcm, 34 ftVlbf)
6. REMOVE DAMPER
Remove the 3 bolts, washers, bushings, spacers and damp-
er.
Torque: 7.8 NVm (80 kgfVcm, 69 in.Vlbf)
7. REMOVE TRAC PUMP
Remove the 3 bolts, 2 nuts, washers, TRAC pump bracket
bushings and TRAC pump.
Torque: 7.8 NVm (80 kgfVcm, 69 in.Vlbf)
8. REMOVE TRAC PUMP BRACKET No.2
Remove the 4 bolts and 2 TRAC pump bracket No.2.
Torque: 7.8 NVm (80 kgfVcm, 69 in.Vlbf)
BR±118± BRAKE SYSTEMTRACTION CONTROL SYSTEM (TRAC)

TRAC ACTUATOR
COMPONENTS
± BRAKE SYSTEMTRACTION CONTROL SYSTEM (TRAC)BR±119

BR±120± BRAKE SYSTEMTRACTION CONTROL SYSTEM (TRAC)

TRAC ACTUATOR REMOVAL
Installation is in the reverse order of removal.
AFTER INSTALLATION, BLEED BRAKE SYSTEM (See
page BR±7) AND BLEED TRAC SYSTEM (See page BR±9)
1. DISCONNECT BRAKE LINES
Using SST, disconnect the brake lines from the TRAC actua-
tor.
SST 09751±36011
Torque: 15 NVm (155 kgfVcm, 11 ftVlbf)
2. REMOVE TRAC ACTUATOR ASSEMBLY
Remove the 2 bolts, nut and TRAC actuator assembly.
Torque: 13 NVm (130 kgfVcm, 9 ftVlbf)
3. REMOVE TRAC ACTUATOR
Remove the 3 bolts and actuator from the bracket.
Torque: 13 NVm (130 kgfVcm, 9 ftVlbf)
4. SEPARATE TRAC ACTUATOR BRACKET
Remove the 2 bolts and separate the bracket.
Torque: 13 NVm (130 kgfVcm, 9 ftVlbf)
± BRAKE SYSTEMTRACTION CONTROL SYSTEM (TRAC)BR±121