Check Mode Procedure

HINT:

Hand-held tester only:

Compared to the normal mode, the check mode is more sensitive for detecting malfunctions. Furthermore, the same diagnostic items which are detected in the normal mode can also be detected in the check mode.

1. Procedure for Check Mode using the hand-held tester.
   1. Check the initial conditions.
      • Battery positive voltage 11 V or more
      • Throttle valve fully closed
      • Transaxle in the P or N position
      • A/C switch is off
   2. Turn the ignition switch off.
   3. Connect the hand-held tester to the DLC3.
      Fig 1: Connecting Hand-Held Tester To DLC3

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Turn the ignition switch to the ON position and turn the hand-held tester main switch on.
   5. When you use hand-held tester:

      Select the item "DIAGNOSIS / ENHANCED OBD II / CHECK MODE" (Check that the MIL flashes).

      NOTE: All DTCs and freeze frame data recorded will be erased if: 1) the hand-held 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 the ON to ACC position or turned OFF.
   6. Start the engine (The MIL goes off after the engine starts).
   7. Perform "MONITOR DRIVE PATTERN" for the ECT test (SEE MONITOR DRIVE PATTERN  ).

      (Or, simulate the conditions of the malfunction described by the customer).

      Fig 2: Performing Monitor Drive Pattern

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002