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 MANUALSMAZDA1998626 LX L4-2.0L DOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESDTCS READING PROCEDURES
1998 Mazda 626 LX L4-2.0L DOHC
DTCs Reading Procedures
1998 Mazda 626 LX L4-2.0L DOHCSECTION DTCs Reading Procedures
READING DTCs PROCEDURE
NOTE: Start engine and bring up to operating temperature before running OBD Test.
1. Perform the necessary vehicle preparation and visual inspection. Hook-up the SST (NGS tester) to the vehicle.
2. Move the cursor to VEHICLE AND ENGINE SELECTION.
3. Move the cursor to SELECT NEW VEHICLE YEAR & MODEL. Press the trigger key to enter this selection.
4. Move the cursor to 1998-VIN #10:W. Press the trigger key enter this selection.
5. Move the cursor to appropriate model. Press the trigger key enter this selection.
6. The vehicle selection screen showing the selected vehicle will be displayed. Move the cursor to the vehicle selected. Press the trigger key.
7. Move the cursor to DIAGNOSTIC DATA LINK in the main menu screen. Press the trigger key to enter into menu system diagnostics.
8. Move the cursor to PCM. Press the trigger.
9. Move the cursor to DIAGNOSTIC TEST MODE.
Press the trigger key to enter this selection.
10. Move the cursor to appropriate mode. Press the trigger key to enter this selection.
11. Retrieve DTCs as follows:
(1) Continuous DTCs
(2) KOEO DTCs
(3) KOER DTCs
NOTE: Start engine and bring up to operating temperature before running OBD Test.
1. Perform the necessary vehicle preparation and visual inspection. Hook-up the SST (NGS tester) to the vehicle.
2. Move the cursor to VEHICLE AND ENGINE SELECTION.
3. Move the cursor to SELECT NEW VEHICLE YEAR & MODEL. Press the trigger key to enter this selection.
4. Move the cursor to 1998-VIN #10:W. Press the trigger key enter this selection.
5. Move the cursor to appropriate model. Press the trigger key enter this selection.
6. The vehicle selection screen showing the selected vehicle will be displayed. Move the cursor to the vehicle selected. Press the trigger key.
7. Move the cursor to DIAGNOSTIC DATA LINK in the main menu screen. Press the trigger key to enter into menu system diagnostics.
8. Move the cursor to PCM. Press the trigger.
9. Move the cursor to DIAGNOSTIC TEST MODE.
Press the trigger key to enter this selection.
10. Move the cursor to appropriate mode. Press the trigger key to enter this selection.
11. Retrieve DTCs as follows:
(1) Continuous DTCs
(2) KOEO DTCs
(3) KOER DTCs
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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.