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 Method
- Abnormality Judgment
Judge as NG when one of the following conditions is established.
| Malfunction Criteria | Threshold Value |
|---|---|
| Target voltage | = 0 V |
| and | |
| Actual voltage | < 0 V |
| or | |
| Actual voltage | > 0.01953125 V |
| Target voltage | = 5 V |
| and | |
| Actual voltage | < 4.979248047 V |
| or | |
| Actual voltage | > 5 V |
Time Needed for Diagnosis: 200 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
- Normality Judgment
Judge as OK and clear the NG if the following conditions are established.
| Malfunction Criteria | Threshold Value |
|---|---|
| Target voltage | = 0 V |
| and | |
| Actual voltage | ≥ 0 V |
| and | |
| Actual voltage | ≤ 0.01953125 V |
| Target voltage | = 5 V |
| and | |
| Actual voltage | ≥ 4.979248047 V |
| and | |
| Actual voltage | ≤ 5 V |
Time Needed for Diagnosis: 2000 ms
NO RELATED
Use the Manual With the Right Hardware
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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.