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 MANUALSMAZDA1991323 L4-1600 1597CCREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLECONTROL MODULETESTING AND INSPECTION
1991 Mazda 323 L4-1600 1597cc
Control Module: Testing and Inspection
1991 Mazda 323 L4-1600 1597ccSECTION Testing and Inspection
1. With ignition switch "ON," check EC-AT control unit terminal voltages, referring to terminal voltage chart.
2. If not correct, check and replace or repair defective component(s) and/or wiring.
3. If voltages are not correct and no other cause is detected, replace control unit.
TERMINAL VOLTAGE CHART
Part 1
EC-AT Control Unit Pin Voltage Chart (Part 1):
Part 2
EC-AT Control Unit Pin Voltage Chart (Part 2):
RENDER: 1.0x
NO RELATED
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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.