Toyota 4Runner: Inspection

Toyota 4Runner Service Manual / Brake / Brake System (other) / Hydraulic Brake Booster / Inspection

INSPECTION

PROCEDURE

1. INSPECT BRAKE BOOSTER PUMP ASSEMBLY

(a) Apply battery voltage to the brake booster pump cables, and check the operation of the pump motor.

OK::

Measurement Condition	Specified Condition
Battery positive (+) voltage → Red cable terminal	Pump motor operates
Battery negative (-) voltage → Black cable terminal	Pump motor operates

Text in Illustration

*1	Red Cable
*2	Black Cable

If the result is not as specified, replace the brake booster pump assembly.

Disassembly

DISASSEMBLY PROCEDURE 1. REMOVE NO. 1 BRAKE ACTUATOR BRACKET (a) Using a 5 mm hexagon wrench, remove the bolt and No. 1 brake actuator bracket. ...

Reassembly

REASSEMBLY PROCEDURE 1. INSTALL BRAKE BOOSTER PISTON SIB-ASSEMBLY (a) Apply a light coat of lithium soap base glycol grease to a new piston. (b ...

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