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.
Diagnostic Monitoring Test Results Access Procedure
1999 Mazda MX-5 Miata L4-1.8L DOHCSECTION Diagnostic Monitoring Test Results Access Procedure
NOTE:
- This is a generic function.
1. Perform the NGS tester hook-up procedure.

2. Move the cursor to GENERIC OBD II FUNCTIONS. Press the trigger key to enter this selection.
3. Press CONT.

4. Turn the menu dial clockwise to scroll the screen. Move the cursor to DIAGNOSTIC MONITORING TEST RESULTS. Press the trigger key to enter this selection.

5. Select and press C-ALL or S-ALL.

6. Press START.

7. The screen immediately displays the results of each test with thresholds. Read the values.
- This is a generic function.
1. Perform the NGS tester hook-up procedure.
2. Move the cursor to GENERIC OBD II FUNCTIONS. Press the trigger key to enter this selection.
3. Press CONT.
4. Turn the menu dial clockwise to scroll the screen. Move the cursor to DIAGNOSTIC MONITORING TEST RESULTS. Press the trigger key to enter this selection.
5. Select and press C-ALL or S-ALL.
6. Press START.
7. The screen immediately displays the results of each test with thresholds. Read the values.
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.