Diagnostic Tests: Notes

WARNING: This page is about a different car, the 2000 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Before performing any diagnostic test, refer to SELF-DIAGNOSTICS - INTRODUCTION article for diagnostic system functions and system diagnostic procedures. For component location, see appropriate illustration in THEORY & OPERATION article. To identify circuits and wire colors referenced in testing, see WIRING DIAGRAMS article.

NOTE: To identify ECM terminals referenced in testing, see illustration. See Fig 1 or Fig 2 .

Fig 1: Identifying Engine Control Module (ECM) Harness Connector Terminals (With California Emissions)

Fig 2: Identifying Engine Control Module (ECM) Harness Connector Terminals (Without California Emissions)