Check Mode Procedure

DESCRIPTION
1. Check mode has a higher sensitivity to malfunctions and can detect malfunctions that normal mode cannot detect. Check mode can also detect all the malfunctions that normal mode can detect. In check mode, DTCs are detected with 1 trip detection logic.
CHECK MODE PROCEDURE
1. Make sure that the following conditions are met:
  1. Battery positive voltage 11 V or more
  2. Throttle valve fully closed
  3. Transmission in the P or N position
  4. A/C OFF
2. Turn the ignition switch OFF.
3. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
4. Turn the ignition switch ON.
5. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / CHECK MODE.
  
  Fig 1: Connecting Intelligent Tester To CAN VIM And DLC3
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Change the ECM to check mode. Make sure the MIL flashes as shown in the illustration.
  NOTE: All DTCs and freeze frame data will be erased if: 1) the intelligent tester is used to change the ECM from normal mode to check mode or vice versa; or 2) during check mode, the ignition switch is turned from ON to ACC or OFF. Before check mode, make notes of the DTCs and freeze frame data.
  
  Fig 2: Monitor Drive Blinking Pattern
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
7. Start the engine. The MIL should turn off after the engine starts.
8. Perform "MONITOR DRIVE PATTERN" for the ECT test (see MONITOR DRIVE PATTERN ).
  (Or, simulate the conditions of the malfunction described by the customer.)
9. After simulating the malfunction conditions, use the intelligent tester to check the DTC and freeze frame data.