1. Turn the ignition switch to the "ON" position without starting the engine.
2. Locate the diagnostic port or connector under the dashboard, usually near the steering column.
3. Use a jumper wire or a paper clip to connect the "TEN" and "GND" terminals in the diagnostic port. The "TEN" terminal is usually labeled as "TEN," while the "GND" terminal is often marked as "GND" or has a ground symbol.
4. After connecting the terminals, the Check Engine Light (CEL) or Malfunction Indicator Light (MIL) on the instrument cluster will start blinking.
5. Count the number of blinks and pauses between the blinks. Each blink represents a digit of the trouble code. There may be multiple trouble codes stored, so count the blinks and pauses for each code.
6. Record the trouble codes by writing down the sequence of blinks and pauses. For example, if the CEL blinks three times, pauses, then blinks twice, the trouble code is 32.
7. Refer to the Mazda trouble code chart or a repair manual for the specific definitions and descriptions of the retrieved trouble codes. This will help you identify and understand the underlying issues with your vehicle.
8. Once you have retrieved and recorded all the trouble codes, remove the jumper wire or paper clip from the diagnostic port.
Remember that this method of retrieving trouble codes is limited to vehicles that are OBD-I compliant, and it may not be applicable to all model years or variants of the Mazda B2500. If you are unsure about the compatibility or accuracy of this method, refer to your vehicle's owner's manual or a professional mechanic for assistance.
