Solar Ventilation ECU Power Source Circuit: Procedure

1. Leave the vehicle for 10 minutes in a location where the following conditions are met, and then measure the voltage.
   SYSTEM OPERATION CONDITIONS REFERENCE TABLE
   
   

   Items	Condition
   Amount of sunlight	A sufficient amount of sunlight is received by the moon roof glass assembly (solar panel). (The amount of sunlight on a cloudless day between 11:00 and 14:00 is typically sufficient for operation.)
   Moon roof glass assembly (solar panel) status	The moon roof glass assembly (solar panel) is not in the shade
   	No fallen leaves or dirt is present on the moon roof glass assembly (solar panel)
   Ambient temperature	20 to 40°C (68 to 104°F)

   NOTE:

   To ensure stable generation of voltage by the moon roof glass assembly (solar panel), make sure to park the vehicle in a location where the system operation conditions reference table are satisfied.

2. Disconnect the solar ventilation ECU connector.
   Fig 1: Identifying Solar Ventilation ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   WARNING:

   The moon roof glass assembly (solar panel) generates electricity when exposed to a light source such as sunlight. If an inspection of the moon roof glass assembly (solar panel) is performed while electricity is being generated, work carefully in order to prevent an accidental short circuit or electric shock.

3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   L22-11 (SBI) - L22-1 (GND)	System operation conditions reference table are met.	12 V or higher

   TEXT IN ILLUSTRATION
   
   

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

NG → See step   3 

OK: Go to next step 

1. Reconnect the solar ventilation ECU connector.
2. Connect the Techstream to the DLC3.
3. Turn the power switch on (IG).
4. Turn the Techstream on.
5. Enter the following menus: Body Electrical / Air Conditioner / Data List.
6. Check the value(s) by referring to the table below.
   1. Check that the Solar Voltage value in the Data List is 10 V or higher.
      AIR CONDITIONER
      
      

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Solar Voltage	Solar panel voltage / Variable, 10V les, 10V-11V, 11V-12V, 12V-13V, 13V-14V, 14V-15V, 15V-16V, 16V-17V, 17V-18V, 18V-19V, 19V-20V, 20V-21V, 21V-22V, 22V-23V or 23V ovr	Actual generated voltage displayed	System operation conditions reference table are met. Refer to SYSTEM DESCRIPTION .

      OK

      10 V or higher

      HINT: 

      If the Data List items are not displayed, inspect the communication circuit between the solar ventilation ECU and A/C amplifier. Refer to Communication Circuit between Solar Ventilation ECU and A/C Amplifier .

NG → See step   5 

OK → See step   4 

1. Disconnect the solar ventilation ECU connector.
   Fig 2: Identifying Solar Ventilation ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the moon roof glass assembly (solar panel) connector.
   Fig 3: Identifying Moon Roof Glass Assembly (Solar Panel) Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L22-11 (SBI) - R15-1 (+B)	Always	Below 1 Ω
   L22-1 (GND) - Body ground	Always	Below 1 Ω
   L22-11 (SBI) - 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 Moon Roof Glass Assembly (Solar Panel))

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   6