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.
Detailed Flow
- INTERVIEW THE CUSTOMER FOR THE SYMPTOM
Interview the customer for the symptom (the condition and the environment when the incident/malfunction occurs).
: GO TO 2.
- CHECK SYMPTOM
Check the symptom from the customer information.
: GO TO 3.
- CHECK WARNING LAMP OPERATION
Check air bag warning lamp operation in the user mode. Refer to "ON BOARD DIAGNOSIS FUNCTION ".
Are any malfunction detected?
YES: GO TO 5.
NO: GO TO 4.
- CHECK LOW VOLTAGE
Check low voltage with CONSULT (Special function). Refer to "CONSULT FUNCTION ".
Are any malfunction detected?
YES: GO TO 9.
NO: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".
- CHECK SELF DIAGNOSTIC RESULTS
Check self diagnostic result with CONSULT or diagnosis mode.
If it is impossible to switch to diagnosis mode, follow the same procedure that DTC is not detected.
NOTE: Perform the following procedure if DTC is detected.- Record DTC (Print them out with CONSULT.)
- Erase self diagnostic result.
- Study the relationship between the malfunction that DTC or air bag warning lamp indicates and the symptom that the customer describes.
- Check related service bulletins for information.
Is DTC detected?
YES: GO TO 6.
NO: GO TO 7.
- PERFORM DTC CONFIRMATION PROCEDURE
Perform DTC CONFIRMATION PROCEDURE for the DTC.
: GO TO 8.
- PERFORM DIAGNOSIS ACCORDING TO WARNING LAMP OPERATION
- Check air bag warning lamp operation in the user mode. Refer to "ON BOARD DIAGNOSIS FUNCTION ".
- Perform Diagnosis Procedure for the air bag warning lamp operation. Refer to
"ON BOARD DIAGNOSIS FUNCTION " (USER MODE).
: GO TO 9.
- DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE
Inspect according to Diagnostic Procedure of the DTC.
: GO TO 9.
- REPAIR OR REPLACE THE MALFUNCTION PART
Repair or replace the malfunctioning part.
: GO TO 10.
- FINAL CHECK
Check self diagnostic result and air bag warning lamp operation in the user mode.
Is the malfunction repaired?
YES: INSPECTION END
NO: GO TO 2.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.