Toyota RAV4 manuals

Toyota Sienna Service Manual: No. 1 Clearance Warning Buzzer Circuit

DESCRIPTION

The clearance warning ECU receives the ultrasonic sensor signal to sound the front warning buzzer.

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

1 INSPECT FRONT BUZZER

INSPECT FRONT BUZZER

  1. Remove the clearance warning ECU with front buzzer.
  2.  Apply the battery voltage to the terminals 1 and 2 of the buzzer, and check that the buzzer sounds.

HINT: The clearance warning buzzer is separately excited, and will not sound unless an alternating voltage is applied.

OK: Operating noise (clicking sounds) can be heard.

2 CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - FRONT BUZZER)

CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - FRONT BUZZER)

  1. Disconnect the clearance warning ECU connector and front buzzer connector.
  2.  Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

Rear Clearance Sonar Sensor RH Circuit
DESCRIPTION An ultrasonic sensor consists of a sensor portion that transmits and receives ultrasonic waves and a preamplifier that amplifies them. The ultrasonic sensor outputs the ultrasonic wave ...

Clearance Warning ECU Power Source Circuit
DESCRIPTION This circuit provides power to the clearance warning ECU. WIRING DIAGRAM INSPECTION PROCEDURE 1 CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - AIR CONDITIONER AMPLIFIER) ...

Other materials:

Reassembly
1. INSTALL REAR SEAT STAY SUB-ASSEMBLY  Install the rear seat stay sub-assembly with the nut. Torque: 5.5 N*m (56 kgf*cm, 49 in.*lbf) 2. INSTALL NO. 2 SEAT CUSHION SPRING ASSEMBLY LH 3. INSTALL LOCUS CABLE LH  Install the locus cable LH with the nut. Torque: 5.5 N*m (56 kg ...

Reassembly
1. INSTALL MAGNETIC CLUTCH ASSEMBLY (a) Install the magnetic clutch stator while aligning the protrusion on the stator with the notch on the air compressor assembly as shown in the illustration. (b) Using a snap ring expander, install a new snap ring with the chamfered side facing up. ...

Removal
1. REMOVE FRONT WHEELS 2. REMOVE ENGINE UNDER COVER NO.1 3. DRAIN AUTOMATIC TRANSAXLE FLUID (a) Remove the drain plug, gasket and drain ATF. (b) Install a new gasket and the drain plug. Torque: 49 N*m (500 kgf*cm, 36 ft.*lbf) 4. REMOVE FRONT DRIVE SHAFT ASSEMBLY LH HINT: (See page DS-6) ...

В© 2011-2019 Copyright www.tsienna.net