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.
2021 Mazda 3 BaseFACTORY OEM SERVICE PROCEDURE
Diagnostic Procedure
POSITION CANNOT BE PROGRAMMED DIAGNOSTIC PROCEDURE
| Step | Inspection | Results | Action |
|---|---|---|---|
| 1 | VERIFY ALL SYSTEM DTCs
|
Yes | Repair the malfunctioning location according to the applicable DTC troubleshooting. |
| No | Go to the next step. | ||
| 2 | INSPECT POSITION MEMORY SWITCH FOR MALFUNCTION
|
Yes | Go to the next step. |
| No | Repair or replace the malfunctioning location and perform the repair completion verification. (See POSITION MEMORY SWITCH REMOVAL/INSTALLATION .) |
||
| 3 | INSPECT INSTRUMENT CLUSTER FOR MALFUNCTION
|
Yes | Go to the next step. |
| No | Repair or replace the malfunctioning location and perform the repair completion verification. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .) |
||
| 4 | INSPECT NOTIFICATION AND WARNING SPEAKER FOR MALFUNCTION
|
Yes | Go to the next step. |
| No | Repair or replace the malfunctioning location and perform the repair completion verification. (See NOTIFICATION AND WARNING SPEAKER REMOVAL/INSTALLATION .) |
||
| Repair completion verification | VERIFY THAT VEHICLE IS REPAIRED
|
Yes | Complete the symptom troubleshooting. (Explain contents of repair to customer) |
| No | Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW (US) .) If the CAN communication is normal, perform the diagnosis from Step 1.
|
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.