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.
Using Diagnostic Tester
1993 Mazda MX-3 V6-1844cc 1.8L DOHCSECTION Using Diagnostic Tester
1. Connect tester tool Nos. 49 H018 9A1 and 49 B019 9A0, or equivalents, to test connector, Fig. 19
2. Set self diagnosis checker select switch to position A, then set system selector to position 3 and self-test switch to self-test position.
3. Turn ignition switch to On position, verify that 88 flashes on display and buzzer sounds for three seconds.
4. If 88 does not flash, check power supply circuit and wiring ground.
5. If 88 flashes and buzzer continues for more than 20 seconds, check for a short circuit between terminal TBS and ground. Replace ABS control unit if necessary and perform step 3 again.
6. Note diagnostic trouble code output and refer to Diagnostic Trouble Code Interpretation for further information regarding specific diagnostic trouble codes and corrective actions.
2. Set self diagnosis checker select switch to position A, then set system selector to position 3 and self-test switch to self-test position.
Fig. 19 Diagnostic Tester Connection:
3. Turn ignition switch to On position, verify that 88 flashes on display and buzzer sounds for three seconds.
4. If 88 does not flash, check power supply circuit and wiring ground.
5. If 88 flashes and buzzer continues for more than 20 seconds, check for a short circuit between terminal TBS and ground. Replace ABS control unit if necessary and perform step 3 again.
6. Note diagnostic trouble code output and refer to Diagnostic Trouble Code Interpretation for further information regarding specific diagnostic trouble codes and corrective actions.
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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.