Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT RADIO RECEIVER ASSY (ILL+)
1. Check that the voltage between terminals at each condition, as shown in Fig 2 .
  
  Fig 1: Inspecting Radio Receiver Assy (ILL+)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 2: Voltage Terminals Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK: CHECK AND REPLACE RADIO RECEIVER ASSY
  
  NG: Go to Next Step
INSPECT RADIO RECEIVER ASSY (ILL-)
1. Check continuity.
  1. Check that the continuity exists between terminals ILL- and GND of radio receiver assy and body ground.
    
    Fig 3: Checking Continuity Exists Between Terminals ILL- & GND
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Standard: Continuity exists.
    
    OK: CHECK AND REPLACE RADIO RECEIVER ASSY
    
    NG: Go to Next Step
2. INSPECT LIGHT CONTROL RHEOSTAT (See INSPECTION )
  OK: CHECK AND REPLACE RADIO RECEIVER ASSY
  
  NG: REPAIR OR REPLACE HARNESS OR CONNECTOR