Toyota RAV4 manuals

Toyota Sienna Service Manual: Illumination Circuit

DESCRIPTION

Power is supplied to the radio receiver and steering pad switch illumination when the light control switch is in the TAIL or HEAD position.

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE: The vehicle is equipped with an SRS (Supplemental Restraint System) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precautionary notice for the supplemental restraint system

1 CHECK ILLUMINATION

  1. Check if the illumination for the radio receiver, steering pad switch, glove box or others (hazard switch, cigarette lighter, etc.) comes on when the light control switch is turned to the HEAD or TAIL position.

Result

Result

2 CHECK HARNESS AND CONNECTOR (BATTERY - SPIRAL CABLE)

CHECK HARNESS AND CONNECTOR (BATTERY - SPIRAL CABLE)

  1. Disconnect the spiral cable connector.
  2.  Measure the voltage according to the value(s) in the table below.

Standard voltage

Standard voltage

3 INSPECT STEERING PAD SWITCH ASSEMBLY

  1. Disconnect the steering pad switch connector.
  2. Connect the positive (+) lead to terminal ILL+ and the negative (-) lead to terminal EAU of the steering pad switch assembly connector.

INSPECT STEERING PAD SWITCH ASSEMBLY

  1. Check if the illumination for the steering pad switch assembly comes on.

OK: Illumination for the steering pad switch assembly comes on.

4 INSPECT SPIRAL CABLE

INSPECT SPIRAL CABLE

  1. Disconnect the steering pad switch and and spiral cable connectors.
  2.  Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

NOTICE: The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may prevent the airbag from deploying. Be sure to read the page shown in the brackets

5 CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - RADIO RECEIVER)

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - RADIO RECEIVER)

  1. Disconnect the connectors from the radio receiver and spiral cable.
  2. Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

*1: 10 Speaker without Navigation System
*2: 6 Speaker with Rear Seat Entertainment System
*3: 6 Speaker without Rear Seat Entertainment System

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

6 CHECK HARNESS AND CONNECTOR (BATTERY - RADIO RECEIVER)

CHECK HARNESS AND CONNECTOR (BATTERY - RADIO RECEIVER)

  1. Disconnect the radio receiver connector.
  2. Measure the voltage according to the value(s) in the table below.

Standard voltage

Standard voltage

*1: 10 Speaker without Navigation System
*2: 6 Speaker with Rear Seat Entertainment System
*3: 6 Speaker without Rear Seat Entertainment System

7 CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMBINATION METER)

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMBINATION METER)

  1. Disconnect the radio receiver connector and combination meter connector.
  2. Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

*1: 10 Speaker without Navigation System
*2: 6 Speaker with Rear Seat Entertainment System
*3: 6 Speaker without Rear Seat Entertainment System

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

Steering Pad Switch Circuit
DESCRIPTION This circuit sends an operation signal from the steering pad switch to the radio receiver. If there is an open in the circuit, the audio system cannot be operated using the steerin ...

Speaker Circuit
DESCRIPTION  When the vehicle has a built-in type amplifier, a sound signal is sent from the radio receiver to the speakers via the "6 Speaker System" circuit.  When the ...

Other materials:

Back 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 waves and sends the received signals to the clearance warning ECU. WIRING DIAGRAM INSPECTION PR ...

Power Slide Door RH does not Operate When Using Inside / Outside Handle
DESCRIPTION  The inside / outside handles have the ability to control operation of the power slide door. Pulling either handle transmits a request signal to the power slide door ECU RH, which then commands the power slide door control motor and clutch to open / close the power sli ...

Bluetooth® phone message function
Received messages can be forwarded from the connected Bluetooth® phone, enabling checking and replying using the audio system. Depending on the type of Bluetooth® phone connected, received messages may not be transferred to the message inbox. If the phone does not support the message func ...

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