CHECK MODE PROCEDURE 1. DESCRIPTION (a) 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 stored with 1-trip detection logic. 2. CHECK MODE PROCEDURE (a) Make sure that the following conditions are met: (1) Battery positive voltage 11 V or more. (2) Throttle valve fully closed. (3) Shift lever in P or N. (4) A/C off. (b) Connect the Techstream to the DLC3. (c) Turn the ignition switch to ON. (d) Turn the Techstream on. (e) Enter the following menus: Powertrain / Engine and ECT / Utility / Check Mode. (f) Check that the MIL flashes as shown in the illustration. ![]() NOTICE:
(g) Start the engine. The MIL should turn off after the engine starts. (h) Perform "Monitor Drive Pattern" for the ECT test (See page
(i) After reproducing the malfunction conditions, use the Techstream to check the DTCs and freeze frame data. |
Toyota Tundra Service Manual > 1ur-fe Engine Control: Mass Air Flow Meter
ComponentsCOMPONENTS ILLUSTRATION InspectionINSPECTION PROCEDURE 1. INSPECT MASS AIR FLOW METER (a) Check the output voltage. (1) Apply battery voltage across terminals 1 (+B) and 2 (E2G). NOTICE: While using the battery during inspection, do not bring the positive and negative tester probes too cl ...