Headlight Beam Level Control System: Inspection

WARNING: This page is about a different car, the 2002 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT HEADLIGHT BEAM LEVEL CONTROL ACTUATOR RESISTANCE
1. Check that continuity exists between terminal 2 and 5.
2. Check that resistance exists between terminal, as shown in the chart.
  
  Fig 1: Headlight Beam Level Control Actuator Resistance Specifications
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 2: Identifying Headlight Beam Level Control Actuator Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If resistance value is not as specified, replace the actuator.
Connector disconnected: INSPECT HEADLIGHT BEAM LEVEL CONTROL ECU CIRCUIT
Disconnect the connector from the ECU and inspect the connector on the wire harness side, as shown.

Fig 3: Identifying Headlight Beam Level Control ECU Connector (Wire Harness Side)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Headlight Beam Level Control ECU Connector Condition Specifications
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If circuit is not as specified, perform the inspection on the following page.
Connector connected: INSPECT HEADLIGHT BEAM LEVEL CONTROL ECU CIRCUIT
Connect the connector from the ECU and inspect the connector on the back side, as shown in the chart.

Fig 5: Identifying Headlight Beam Level Control ECU Connector (Back Side)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 6: Headlight Beam Level Control ECU Connector Condition Specifications
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the circuit is not as specified, replace the ECU.