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 TURN SIGNAL SWITCH ASSY
1. Remove the combination switch with connector.
2. Measure voltage between terminals B and E of the combination switch.
  OK:
  
  Voltage: 10 - 14 V
3. Turn the ignition switch ON.
4. Measure voltage between terminals IG and E of combination switch.
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 )