Diagnostic Tests: Notes

WARNING: This page is about a different car, the 2003 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Before performing any diagnostic test, refer to SELF-DIAGNOSTIC SYSTEM for diagnostic system functions and system diagnostic procedures. Also check for any related Technical Service Bulletins (TSBs).

NOTE: When performing diagnostic tests, it may be necessary to identify Engine Control Module (ECM) electrical connector terminals which are referenced to in testing procedure. See Fig 1. For locating emission related components, see Fig 2.

Fig 1: Identifying ECM Connectors & Terminals

Fig 2: Locating Emission Related Components