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:

Installation
1. INSTALL DISTANCE CONTROL ECU ASSEMBLY  Using a torque wrench, install the bolt. Torque: 5 N*m (51 kgf*cm, 44 in.*lbf) NOTICE: Do not install the dropped or shocked distance control ECU assembly. 2. INITIALIZE DISTANCE CONTROL ECU NOTICE: After replacing the distance control ECU ...

Freeze frame data
1. FREEZE FRAME DATA (a) Whenever a DTC is detected or the ABS operates, the skid control ECU stores the current vehicle (sensor) state as freeze frame data. The skid control ECU stores the number of times (maximum: 31) the ignition switch has been turned from OFF to the ON position since th ...

Reassembly
1. APPLY HIGH TEMPERATURE GREASE (a) Apply the high temperature grease to the surface on which the shoe and backing plate attach. 2. INSTALL PARKING BRAKE SHOE LEVER LH (a) Install the shoe lever and shim to the rear shoe with a new C-washer. (b) Using a feeler gauge, measure the clearance. ...

В© 2011-2022 Copyright www.tsienna.net