Diagnostic Tests: Notes

WARNING: While ignition is on. Do not connect or disconnect battery, or any other electrical connector. Component damage may result.

CAUTION: When battery is disconnected, vehicle computer and memory system may lose memory data. Driveability problems may exist until computer system have completed a relearn cycle.

CAUTION: DO NOT spray carburetor cleaner on or near coils or plug wires. Allow enough time between checking areas for leaks for carburetor spray to dissipate.

NOTE: Before performing any diagnostic test, refer to SELF-DIAGNOSTIC SYSTEM for system functions and system diagnostic procedures.

NOTE: If more than one DTC is stored at E/TCM or ECM memory, always perform diagnosis from first DTC stored at E/TCM or ECM memory, unless stated otherwise in test procedure.

NOTE: If component testing procedure is not covered in DTC Self-Diagnosis article, see SYSTEM & COMPONENT TESTING article.

NOTE: For identification of circuits, terminals and wire colors referenced in the testing procedure. See WIRING DIAGRAMSarticle.

NOTE: After any repair has been made. See AFTER-REPAIR PROCEDURE under SELF DIAGNOSTIC SYSTEM.

NOTE: For component removal and installation, see REMOVAL & INSTALLATION article.

NOTE: In some instances a short to ground or a short to power may cause damage to control modules. Do not replace control modules until testing proves these conditions do not exist. Also verify that ground circuits have good continuity to ground.