Check Mode Procedure

WARNING: This page is about a different car, the 2008 Lexus RX 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 ignition switch to the ON position.
3. Select "SIGNAL CHECK", and proceed to checking with 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: Checking DTC Using Intelligent Tester
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