Lexus SC300 / Lexus SC400. Manual - part 260

w/ TRAC:

1. 

INSPECT BATTERY POSITIVE VOLTAGE

Battery positive voltage:

10–14 V

2. 

DISCONNECT CONNECTORS FROM ACTUATOR
Disconnect the 2 connectors from the actuator.

3. 

CONNECT ACTUATOR CHECKER (SST) TO ACTUATOR

(a)  Connect the actuator checker (SST) to the actuator side wire

harnesses via the sub–wire harnesses (SST), as shown.
SST 09990–00150 and 09990–00250

(b)  Connect the red cable of the checker to the battery positive

(+) terminal and the black cable to negative (–) terminal.
Connect the black cable of the sub–wire harnesses to the
battery negative (–) terminal or body ground.

(c)  Place “SHEET A” (SST) on the actuator checker.

SST 09990–00163

4. 

INSPECT BRAKE ACTUATOR OPERATION

(a)  Start the engine, and run it at idle speed.
(b)  Turn the selector switch of the actuator checker to the

“FRONT RH” position.

(c)  Push and hold in the MOTOR switch for a few seconds.
(d) Depress the brake pedal and hold it until step (g) is

completed.

BR–68

–

BRAKE SYSTEM

ANTI–LOCK BRAKE SYSTEM (ABS)

(e)  Push the POWER SWITCH, and check that the brake pedal

can not be depressed.

NOTICE: Do not keep the MAIN push switch pushing more

than 10 seconds.

(f)  Release the switch, and check that the pedal can be

depressed.

(g)  Push and hold in the MOTOR switch for a few seconds, and

check that the pedal returns.

(h)  Release the brake pedal.

(i) 

Push and hold in the MOTOR switch for a few seconds.

(j) Depress 

the brake pedal and hold it for about 15 seconds. As

you hold the pedal down, push the SUB MOTOR switch for
a few seconds. Check that the brake pedal does not pulsate.

5. 

INSPECT FOR OTHER WHEELS

(a)  Turn the MAIN selector switch to the “FRONT LH” position.
(b)  Repeat (c) to (j) of step 4, checking the actuator operation in

the same way.

(c)  Also, inspect the “REAR RH” and “REAR LH” positions

following the same procedure.
HINT: When inspecting the “REAR LH” position, push the
REAR LH switch instead of the POWER SWITCH. This
makes it possible to inspect wherever the selector switch
position indicates.

–

BRAKE SYSTEM

ANTI–LOCK BRAKE SYSTEM (ABS)

BR–69

6. PUSH 

MOTOR 

SWITCH

Push and hold in the MOTOR switch for a few seconds.

7. 

DISCONNECT ACTUATOR CHECKER (SST) FROM
ACTUATOR

(a) Disconnect the actuator checker (SST) and sub–wire

harnesses (SST) from the actuator.
SST 09990–00150, 09990–00163, and 09990–00250

(b)  Connect the actuator connectors.
(c)  Clear the diagnostic trouble codes.

(See page 

BR–77

)

BR–70

–

BRAKE SYSTEM

ANTI–LOCK BRAKE SYSTEM (ABS)

BR0F2–02

SPEED SENSOR

SPEED SENSOR REMOVAL AND
INSTALLATION

Remove and install the parts, as shown.

–

BRAKE SYSTEM

ANTI–LOCK BRAKE SYSTEM (ABS)

BR–71