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:

Diagnosis System
DIAGNOSIS SYSTEM 1. FUNCTION OF AUTOMATIC RUNNING BOARD WARNING LIGHT (a) When a malfunction is detected in the automatic running board system, the automatic running board warning light in the combination meter comes on to inform the driver of the malfun ...

ID BOX EEPROM Malfunction (B2790)
DESCRIPTION This DTC is stored when the ID code box detects an internal malfunction. DTC Code DTC Detection Condition Trouble Area B2790 The ID code box detects an internal malfunction. ...