Diagnostic Tests: Introduction

WARNING: This page is about a different car, the 2002 Mazda 626 and 2001 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Diagnostic tests are diagnostic formats used to test and service EEC-V system. For DTCs related to engine performance concerns, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST) allows technician to identify problems and retrieve DTCs. Diagnostic tests check transaxle circuits, sensors, solenoids and actuators.

NOTE: Perform all voltage tests with a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure.

Procedures in DIAGNOSTIC TESTS are written for the use of the following Mazda Motor Corp. test equipment:

New Generation Star (NGS) Tester (49 T088 0A0)
Breakout Box (49 UN01 130)
Transmission Tester (49 UN01 071) with Transmission Overlay (49 UN01 090)

Terminal pin references are based on this equipment and appropriate overlays. All references to test pins, test terminals or jacks refer to test equipment. When aftermarket test equipment is used, always follow test equipment manufacturer's procedures.