Problem No.1

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

CLOCK WILL NOT OPERATE
1. Turn the ignition switch ON.
2. Check that the battery voltage is 10 - 16 V. If voltage is not as specified, replace the battery.
3. Troubleshoot the clock as follows.
  HINT:
  
  Inspect the connector on the wire harness side.
  
  Fig 1: Identifying Clock Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 2: Troubleshooting Flow Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002