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Inspection Procedure

WARNING: This page is about a different car, the 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check Voltage Between Terminals TS And S5-3 Of Integration Control And Panel Connector 

    Preparation: 

    Remove integration control and panel with connectors still connected.

    Check: 

    1. Turn ignition switch to ON.
      2. NOTE: As the inspection light is moved away from the sensor, the voltage increases.
    2. Measure voltage between terminals TS and S5-3 of integration control and panel connector when the solar sensor is subjected to an electric light, and when the sensor is covered by a cloth.

    OK: 

    Fig 1: Locating Integration Control And Panel TS & S5-3 Terminals
    G01118897Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Resistance Specification Chart for Integration Control And Panel Between TS & S5-3 Terminals
    G01118896Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Go to step 2. 
    2. OK: Proceed to next circuit inspection shown on problem symptoms table. See  PROBLEM SYMPTOMS TABLE  . However, if DTC 21 is displayed, check and replace integration control and panel. 
  2. Check Solar Sensor 

    Preparation: 

    Remove solar sensor.

    Check: 

    1. Cover the sensor with a cloth.
      2. NOTE: Connect positive (+) lead of ohmmeter to terminal 1 and negative (-) lead to terminal 2 of the solar sensor.
      Fig 3: Locating Solar Sensor Terminals
      G01118898Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure resistance between terminals 1 and 2 of solar sensor connector.

    OK: 

    Resistance: oo (infinity) Ω (no continuity)  .

    Preparation: 

    1. Remove the cloth from the solar sensor and subject the sensor to electric light.
      2. NOTE: As the electric light is moved away from the sensor, the resistance increases.
    2. Measure resistance.

    OK: 

    Resistance: Approx. 4 kΩ (continuity)  .

    1. NG: Replace solar sensor. 
    2. OK: Go to next step. 
  3. Check Harness And Connector Between Integration Control And Panel And Solar Sensor 
    1. NG: Repair or replace harness or connector. 
    2. OK: Check and replace integration control and panel. 
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