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
Judge as NG if the criteria below are met.
Judgment value (diagnosis 1)
| Malfunction Criteria | Threshold Value |
|---|---|
| Throttle minimum stop position | 2.22 V or more |
Judgment value (diagnosis 2)
| Malfunction Criteria | Threshold Value |
|---|---|
| Accelerator pedal position learning value in backup RAM area 1 | Not equal to accelerator pedal position learning value in backup RAM area 2 |
Judgment value (diagnosis 3)
| Malfunction Criteria | Threshold Value |
|---|---|
| Total of backup RAM (ECM shutdown) | Not equal to total of backup RAM (ECM startup) |
Judgment value (diagnosis 4)
| Malfunction Criteria | Threshold Value |
|---|---|
| Communication status between main CPU and sub CPU | Malfunction |
Judgment value (diagnosis 5)
| Malfunction Criteria | Threshold Value |
|---|---|
| Throttle control calculation data by main CPU | Not equal to throttle control calculation data by sub CPU |
Judgment value (diagnosis 6)
| Malfunction Criteria | Threshold Value |
|---|---|
| Calculation data by main CPU | Not equal to calculation data by FPU |
Judgment value (diagnosis 7)
| Malfunction Criteria | Threshold Value |
|---|---|
| Actual engine output - Target engine output | More than 20 kw (27 PS) |
Time needed for diagnosis
Diagnosis 1, 2, 3, 4 and 5: Less than 1 s
Diagnosis 6: 200 ms
Diagnosis 7: 500 ms
Malfunction indicator light illumination: Illuminates as soon as a malfunction occurs.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.