Inspect Automatic Light Control Sensor Circuit

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.

Connector connected:
- Ignition switch ON.
- Light control switch AUTO.
- Vehicle's surroundings are bright.
  
  Fig 1: Identifying Automatic Light Control Sensor Terminals (Back Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 2: Automatic Light Control Sensor Terminal Specifications (Connector Connected)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If circuit is as specified, try replacing the sensor with a new one. If the circuit is not as specified, inspect the circuit connected to other parts.
Connector disconnected :
Disconnect the connector from the sensor and inspect the connector on the wire harness side, as shown in Fig 4.

Fig 3: Identifying Automatic Light Control Sensor Terminals (Wire Harness Side)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Automatic Light Control Sensor Terminal Specifications (Connector Disconnected)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If circuit is as specified, perform the inspection on the following page.

If the circuit is not as specified, inspect the circuit connected to other parts.