Troubleshooting No. 3

WARNING: This page is about a different car, the 2004 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.

DRIVE MONITOR FUNCTION MALFUNCTION
1. Check that the battery positive voltage is 10 - 16 V.
  If voltage is not as specified, replace the battery.
2. Troubleshoot the drive monitor function as follows.
  HINT:
  
  Inspect the connector on the wire harness side.
  
  Fig 1: Drive Monitor Function Malfunction Flow Chart
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