Toyota RAV4 manuals

Toyota Sienna Service Manual: System description

1. DESCRIPTION OF OCCUPANT CLASSIFICATION SYSTEM

  1.  GENERAL DESCRIPTION.
  1.  In the occupant classification system, the occupant classification ECU calculates the weight of the occupant based on a signal from the occupant classification sensors. This system recognizes the occupant to be a child if it detects a weight of less than 36 kg (79.37 lb), and disables the front passenger airbag and front passenger side - side airbag.
  2. This system is mainly comprised of 4 occupant classification sensors that detect the load on the front passenger seat. The occupant classification ECU controls the system, and the passenger airbag ON/OFF indicator indicates the ON/OFF condition of the front passenger airbag and front passenger side - side airbag.
  1.  OCCUPANT CLASSIFICATION SENSOR.

DESCRIPTION OF OCCUPANT CLASSIFICATION SYSTEM

  1. The occupant classification sensors are installed on 4 brackets connecting the seat rail and seat frame. Accordingly, when load is applied to the front passenger seat by an occupant sitting in it, the occupant classification sensors register a distortion.
  1.  DESCRIPTION FOR PASSENGER AIRBAG ON/OFF INDICATOR.

 DESCRIPTION FOR PASSENGER AIRBAG ON/OFF INDICATOR.

  1.  The passenger airbag ON/OFF indicator is installed on the air conditioning control assembly. This indicator informs the driver whether the occupant classification ECU puts the front passenger airbag assembly and side airbag (front passenger side) into an active state or inactive state.
  2.  If a malfunction occurs in the occupant classification system, "OFF" indication of the passenger airbag ON/OFF indicator and the SRS warning light will come on.
Precaution
1. INSPECTION PROCEDURE FOR VEHICLE INVOLVED IN ACCIDENT  Perform the zero point calibration and sensitivity check if any of the following conditions occur.  The occupant classi ...

How to proceed with troubleshooting
The intelligent tester can be used in steps 4, 6, 8 and 9. 1 VEHICLE BROUGHT TO WORKSHOP 2 CUSTOMER PROBLEM ANALYSIS 3 PASSENGER AIRBAG ON/OFF INDICATOR CHECK 4 DTCs CHECK (Present and Past ...

Other materials:

Switching on/off and interrupting cruise control
With steering and traffic jam assistant: Assisted Driving General information This button is used to switch the configured function on and off. The button can be used to set the primarily used function. Set function 1. When the system is active, press the button repeatedly until the desired funct ...

ECM Power Source Circuit
DESCRIPTION When the ignition switch is turned to the ON position, the battery voltage is applied to terminal IGSW of the ECM. The ECM MREL output signal causes a current to flow to the coil, closing the contacts of the EFI relay and supplying power to terminal +B of the ECM. If the igniti ...

Heater relay (for rear air conditioning system)
ON-VEHICLE INSPECTION 1. INSPECT REAR HEATER RELAY (a) Remove the rear heater relay. (b) Measure the resistance according to the value(s) in the table below. Standard resistance If the resistance is not as specified, replace the rear heater relay. ...

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