Retrieving Diagnostic Trouble Codes

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2002 Toyota Tundra, 2002 Toyota Tacoma, 2002 Toyota Sequoia, 2002 Toyota 4Runner, and 2001 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Before retrieving DTCs, ensure sufficient battery voltage exists for proper self-diagnosis system operation. Ensure proper operation of MIL. MIL will illuminate for all OBD-II DTCs that affect emissions. For any engine performance or emission system-related DTCs not listed in DIAGNOSTIC TROUBLE CODE IDENTIFICATION table, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.

Connect scan tool to DLC3. DLC3 is located under instrument panel, above pedal assembly. See Figure. Turn ignition on. Turn on scan tool. If using Toyota scan tool, ensure tool is in NORMAL mode. CHECK MODE will erase all DTCs. Retrieve any DTCs stored in memory following scan tool instructions. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . Record DTCs and any freeze-frame data.

NOTE: Turning ignition switch to OFF position, with Toyota scan tool in CHECK MODE, will erase all DTCs and freeze-frame data.

If using Toyota scan tool, CHECK MODE may be used to detect malfunctions. CHECK MODE has a higher sensing ability as compared to NORMAL MODE. With Toyota scan tool connected to DLC3, turn ignition switch on and turn scan tool on. Switch Toyota scan tool from NORMAL to CHECK MODE. Ensure MIL flashes. Start engine and simulate conditions of malfunction as described by customer. Ignition switch MUST be on at all times. Check DTCs and freeze-frame data.