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Home >> Toyota >> 2012 >> Prius Plug-in >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 137 (Solar Ventilation System (Except Plug-In) (Diagnostics & Circuit Tests)) >> Solar Ventilation System >> Circuit Tests >> Solar Ventilation Switch Circuit >> Procedure
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Solar Ventilation Switch Circuit: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Air Conditioner / Data List.
    5. Check the value(s) by referring to the table below.
      AIR CONDITIONER

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Solar Ventilation Switch Solar ventilation switch (Switch recognition value at A/C amplifier side) / OFF or ON OFF: Solar ventilation switch off
      ON: Solar ventilation switch on      		 -
      Solar Ventilation Switch Status Solar ventilation switch (Switch recognition value at solar ventilation ECU side) / OFF or ON OFF: Solar ventilation switch off
      ON: Solar ventilation switch on      		 -

      OK

      The display is as specified in the Normal Condition column.

      Result

      Result Proceed to
      OK A
      NG
      (OFF/ON display does not change for both Solar Ventilation Switch Status and Solar Ventilation Switch even though the solar ventilation switch is operated.)      		 B
      NG
      (OFF/ON display does not change for Solar Ventilation Switch even though the solar ventilation switch is operated.)      		 C
      NG
      (OFF/ON display does not change for Solar Ventilation Switch Status even though the solar ventilation switch is operated.)      		 D

    B → See step   2 

    C → See step   5 

    D → See step   9 

    A → See step   7 

  2. INSPECT SOLAR VENTILATION SWITCH 
    1. Remove the solar ventilation switch.
      Fig 1: Identifying Solar Ventilation Switch
      GTY211955Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      L66-9 (SW+) - L66-6 (SW-) Solar ventilation switch: off
      (when switch is not pressed)      		 10 kΩ or higher
      L66-9 (SW+) - L66-6 (SW-) Solar ventilation switch: on
      (when switch is pressed)      		 Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Component without harness connected
      (Solar Ventilation Switch)

    NG → See step   8 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (SOLAR VENTILATION SWITCH - BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 2: Identifying Harness And Connector (Solar Ventilation Switch - Body Ground)
      GTY222563Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      L66-6 (SW-) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Solar Ventilation Switch)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (SOLAR VENTILATION SWITCH - SOLAR VENTILATION ECU) 
    1. Disconnect the solar ventilation ECU connector.
      Fig 3: Identifying Harness And Connector (Solar Ventilation Switch - Solar Ventilation ECU)
      GTY220254Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.
      Fig 4: Identifying L66 Connector (SW+)
      GTY222562Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      L22-13 (PVSW) - L66-9 (SW+) Always Below 1 Ω
      L22-13 (PVSW) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Solar Ventilation ECU)
      *2 Front view of wire harness connector
      (to Solar Ventilation Switch)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   9 

  5. CHECK HARNESS AND CONNECTOR (SOLAR VENTILATION ECU - A/C AMPLIFIER) 
    1. Disconnect the A/C amplifier connector.
      Fig 5: Identifying A/C Amplifier Connector
      GTY236413Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.
      Fig 6: Identifying L22 Connector (PVSO)
      GTY220253Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      L17-25 (PVSW) - L22-14 (PVSO) Always Below 1 Ω
      L17-25 (PVSW) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to A/C Amplifier)
      *2 Front view of wire harness connector
      (to Solar Ventilation ECU)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  6. REPLACE SOLAR VENTILATION ECU 
    1. Replace the solar ventilation ECU with a known good one and check if the same problem occurs again. Refer to REMOVAL .

      OK

      Same problem does not occur.

    NG → See step   10 

    OK → END (SOLAR VENTILATION ECU WAS DEFECTIVE) 

  7. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE  
  8. REPLACE SOLAR VENTILATION SWITCH. Refer to  REMOVAL 
  9. REPLACE SOLAR VENTILATION ECU. Refer to  REMOVAL 
  10. REPLACE A/C AMPLIFIER. Refer to  REMOVAL 
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