CHECK ENGINE Light/Malfunction Indicator Light (MIL)

WARNING: This page is about a different car, the 1995 Mazda MX-6 and 1995 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.

Turn ignition on. Connect a jumper wire between Self-Test Input (STI) pigtail and signal return (SIG RTN) terminal of Data Link Connector (DLC). See Fig 1-3. Go to KOEO SELF-TEST.

Fig 1: Connecting Self-Test Equipment Self-Test Hookup For Analog VOM

Courtesy of MAZDA MOTORS CORP.

Fig 2: Connecting Self-Test Equipment Self-Test Hookup For CHECK ENGINE Light/MIL

Courtesy of MAZDA MOTORS CORP.