Without Hand-Held Tester

WARNING: This page is about a different car, the 2004 Lexus SC 430, 2003 Lexus SC 430, and 2002 Lexus SC 430. 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 or 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 diagnostic circuit, VSC warning light circuit or ABS warning light circuit. See SYSTEM TESTING .
Disconnect terminals Tc and CG.

Fig 1: Identifying Tc Terminal Of DLC3

Fig 2: Identifying Blinking Patterns