Without Hand-Held Tester

WARNING: This page is about a different car, the 2004 Lexus IS 300, 2003 Lexus IS 300, and 2002 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.

Using special tool (09843-18040), connect terminals Tc and CG of DLC3. See Fig 1.
Turn the ignition switch ON. Read the DTC from the ABS warning light and the VSC warning light blinking patterns on the combination meter. For the blinking patterns for normal and codes 11 and 21 see Fig 2.
For diagnostic trouble code definitions see DIAGNOSTIC TROUBLE CODE DEFINITIONS .
If 2 or more malfunctions are indicated at the same time the lowest numbered DTC will be displayed first.
If a code does not appear, inspect the ABS warning light circuit and VSC warning light circuit. See SYSTEM TESTING .

Fig 1: Identifying DLC3 Terminals

Fig 2: Identifying Blinking Patterns