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 MANUALSMAZDA1991PROTEGE L4-1839CC 1.8L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMDISTRIBUTORTESTING AND INSPECTION
1991 Mazda Protege L4-1839cc 1.8L SOHC
Distributor: Testing and Inspection
1991 Mazda Protege L4-1839cc 1.8L SOHCSECTION Testing and Inspection
In the electronic engine control system utilized on this vehicle, two signals generated by the distributor crank angle sensor are used by the ECU in its calculations for various outputs. When problems with these signals are detected, malfunction codes are set and can be retrieved from the on-board diagnostic system.
A faulty "Ne" signal will set malfunction code 02. A problem with the "G" signal will set malfunction code 03. Refer to Computers and Control Systems for diagnostic information.
A faulty "Ne" signal will set malfunction code 02. A problem with the "G" signal will set malfunction code 03. Refer to Computers and Control Systems for diagnostic information.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.