Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT HEADLAMP LEVELING ECU ASSY
1. Remove the headlamp leveling ECU with connector.
2. Turn the ignition switch ON.
3. Measure voltage between terminals IG and GND of headlamp leveling ECU assy.
OK:

Voltage: 10 - 14 V
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE )
2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON (See PROBLEM SYMPTOMS TABLE )