Test D: Initial Set Control Function Does Not Operate (Warning Light Goes Off)

WARNING: This page is about a different car, the 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.

Check the initialize. Start the engine. Check that the initial set control function of both headlights operates. If the results are OK, go to the next step. If the results are not good, go to step 3.

Check the headlight beam level control actuator resistance. See Figure. Check that continuity exists between terminals No. 2 and 5. See CONNECTOR IDENTIFICATION . Check that the resistance exists between terminals. See INSPECTING HEADLIGHT BEAM LEVEL CONTROL ACTUATOR RESISTANCE table. If the results are OK, check and replace the headlight unit. See HEADLIGHT ASSEMBLY under REMOVAL & INSTALLATION. If the results are not good, replace the headlight unit.

INSPECTING HEADLIGHT BEAM LEVEL CONTROL ACTUATOR RESISTANCE

Terminal	Resistance (Ohms)
2 - 1	26 - 30
2 - 3	26 - 30
2 - 4	26 - 30
2 - 6	26 - 30
5 - 1	26 - 30
5 - 3	26 - 30
5 - 4	26 - 30
5 - 6	26 - 30

Check the continuity of the vehicle side wiring harness between the headlight leveling ECU and the headlight leveling motor. If there is continuity, check and replace the headlight leveling ECU assembly. See HEADLIGHT ASSEMBLY under REMOVAL & INSTALLATION. If there is not continuity, repair or replace the harness or connector.