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 ...

Other materials about Toyota 4Runner:

All Door Entry Lock/Unlock Functions do not Operate, but Wireless Functions Operate
DESCRIPTION When the wireless operation can be used to lock and unlock the doors, the communication line between the door control receiver and certification ECU is normal. When the entry operation does not operate, one of the following may be the cause: 1 ...

Taillight Relay Circuit
DESCRIPTION The main body ECU receives headlight dimmer switch information signals, and illuminates the clearance lights, taillights and license plate lights. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses and bulbs for circuits rela ...