Check Mode Procedure

WARNING: This page is about a different car, the 2007 Lexus ES 350. 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 "SIGNAL CHECK", and proceed with checking using the intelligent tester.
  NOTE: Select "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 sensitively 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.
    
    Fig 1: Connecting Intelligent Tester To DLC3
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