Check Mode Procedure

WARNING: This page is about a different car, the 2006 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.

CHECK MODE (SIGNAL CHECK): DTC CHECK
1. Connect the intelligent tester to the DLC3.
2. Turn the engine switch on (IG).
3. Select the "SIGNAL CHECK", and proceed checking with the intelligent tester.
  
  Fig 1: Connecting Intelligent Tester To DLC3
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NOTE: Select the "SIGNAL CHECK" from the "DTC CHECK" screen displayed on the intelligent tester to clear the output DTCs (both present and past).
  
  HINT:
  - DTCs can be detected more sensitivity in check mode than in normal diagnosis mode.
  - Perform check mode inspection when a malfunction in each squib circuit is suspected even after the normal system code is output through normal diagnosis mode inspection.