1. Problem No. 1

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

CLOCK WILL NOT OPERATE
1. Check that the battery positive voltage is 10 - 16 V.
  If voltage is not as specified, replace the battery.
2. Check that the DOME fuse is not blown.
  If the fuse is blown, replace the fuse and check for short.
3. Troubleshoot the clock as follows.
NOTE: Inspect the connector on the wire harness side.

Fig 1: Inspecting Connector On Wire Harness Side
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Connector Inspection Flow Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002