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 (+B, ACC, GND)
1. Check that the continuity between terminals at each condition, as shown in Fig 1 .
  Standard:
  
  Fig 1: Checking Continuity Between Terminals +B, ACC & GND
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check that the voltage between terminals at each condition, as shown in Fig 2 .
  Standard:
  
  Fig 2: Checking Voltage Between Terminals +B, ACC & GND
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 3: Identifying Inspect Radio Receiver Assy (+B, ACC & GND)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
  
  OK: CHECK AND REPLACE RADIO RECEIVER ASSY