Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA1991MX-6 L4-2184CC 2.2L SOHC TURBO F2REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSDATA LINK CONNECTORDESCRIPTION AND OPERATION
1991 Mazda MX-6 L4-2184cc 2.2L SOHC Turbo F2
Data Link Connector: Description and Operation
1991 Mazda MX-6 L4-2184cc 2.2L SOHC Turbo F2SECTION Description and Operation
Check Connector:
^ The Test Connector is a green, one pin connector located on the left side of the engine compartment.
^ When grounded, test connector activates the self-diagnostic system, causing the malfunction indicator lamp (MIL) to flash any codes stored in ECU memory.
^ Grounding the test connector is necessary to read malfunction codes with the Mazda Self-Diagnosis Checker or other compatible "Scan" tool.
^ Test connector is also grounded when making idle speed and ignition timing adjustments.
NOTE: The ECU continuously checks for input device malfunctions, but only checks output devices during the three second period after the ignition is switched "ON" with the test connector grounded. If malfunction codes are present, the lowest numbered code will be displayed first, followed by any others in numerical order.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.