LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2009 >> Sienna LE, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Entertainment Systems >> Audio/Visual >> Audio And Visual System >> Illumination Circuit >> Inspection Procedure

Inspection Procedure

NOTE: 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 (See INSPECTION ).
  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 CHART

      Result Proceed to
      Illumination comes on for all components except steering pad switch. A
      Illumination comes on for all components except radio receiver. B
      No illumination comes on (radio receiver, hazard switch, glove box, etc.). C
      Illumination comes on only for glove box and steering pad switch. D

    B:  Go to step  6

    C:  GO TO LIGHTING SYSTEM

    D:  GO TO METER / GAUGE SYSTEM

    A: Go to Next Step 

  2. CHECK HARNESS AND CONNECTOR (BATTERY - SPIRAL CABLE) 
    1. Disconnect the spiral cable connector.
      2. Fig 1: Identifying Spiral Cable Connector Terminal
      G04966687Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified condition
      ILL+ - Body ground Light control SW TAIL or HEAD 10 to 14 V

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  3. INSPECT STEERING PAD SWITCH ASSEMBLY 
    1. Disconnect the steering pad switch assembly connector.
    2. Connect the positive (+) lead to terminal ILL+ and the negative (-) lead to terminal EAU of the steering pad switch assembly connector.
      Fig 2: Identifying Steering Pad Switch Assembly
      G05676439Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check if the illumination for the steering pad switch assembly comes on.

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

    NG: REPLACE STEERING PAD SWITCH LH 

    OK: Go to Next Step 

  4. INSPECT SPIRAL CABLE 
    1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Spiral Cable Position Specified condition
      EAU - EAU Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      ILL+ - ILL+ Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      Fig 3: Identifying Spiral Cable Connector Terminals
      G04966689Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE: 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 (See REMOVAL ).

    NG: REPLACE SPIRAL CABLE 

    OK: Go to Next Step 

  5. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - RADIO RECEIVER) 
    1. Disconnect the radio receiver connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified condition
      SWG - EAU Always Below 1 Ω
      SWG - Body ground Always 10 kΩ or higher
      Fig 4: Identifying Spiral Cable And Radio Receiver Connector Terminals
      G05141065Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      *1: 10 Speaker System

      *2: 6 Speaker with Rear Seat Entertainment System

      *3: 6 Speaker without Rear Seat Entertainment System

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

  6. CHECK HARNESS AND CONNECTOR (BATTERY - RADIO RECEIVER) 
    1. Disconnect the radio receiver connector.
      2. Fig 5: Identifying Radio Receiver Connector Terminals
      G05141066Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified condition
      ILL+ - Body ground Light control switch TAIL or HEAD 10 to 14 V

      *1: 10 Speaker System

      *2: 6 Speaker with Rear Seat Entertainment System

      *3: 6 Speaker without Rear Seat Entertainment System

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  7. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMBINATION METER) 
    1. Disconnect the combination meter connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified condition
      ILL - - C10-22 Always Below 1 Ω
      ILL - - Body ground Always 10 kΩ or higher
      Fig 6: Identifying Radio Receiver And Combination Meter Connector Terminals
      G05141067Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      *1:10 Speaker System

      *2: 6 Speaker with Rear Seat Entertainment System

      *3: 6 Speaker without Rear Seat Entertainment System

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

scientia non olet · About LEMON Manuals