Toyota Tundra Service Manual: Check For Intermittent Problems

CHECK FOR INTERMITTENT PROBLEMS

HINT:

Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect with the Techstream when the ECM is in check mode. In check mode, the ECM uses 1 trip detection logic, which is more sensitive to malfunctions than normal mode (default), which uses 2 trip detection logic.

  1. Clear the DTCs (See page ).
  2. Switch the ECM from normal mode to check mode using the Techstream (See page ).
  3. Perform a simulation test.
  4. Check and wiggle the harness(es), connector(s) and terminal(s).
    Brake Override System

    Check Mode Procedure

    See More:

    Toyota Tundra Service Manual > Can Communication System: Navigation ECU Communication Stop Mode
    DESCRIPTION Detection Condition Symptoms Trouble Area Navigation ECU Communication Stop Mode Any of the following conditions are met: Communication stop for "Display and Navigation (AVN)" is indicated on the "Communication Bus Check" screen of the Techstream. Communication system DTCs (DTCs that sta ...

    Toyota Tundra Owners Manual

    Toyota Tundra Service Manual

    © 2025 Copyright www.ttundra.com
    0.0333