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 the following conditions are established.
| Malfunction Criteria | Threshold Value |
|---|---|
| Engine oil temperature | < 50°C (122°F) |
| After engine start oil temperature sensor characteristic diagnosis timer | ≥ Judgment value for after engine start oil temperature sensor characteristic diagnosis timer |
After engine start oil temperature sensor characteristic diagnosis timer (timer for diagnosis)
- Timer stop at fuel cut
- During the driving conditions except a) above, timer counts up as follows.
64 ms + TOILCNT ms (when at 64 ms)
Where, TOILCNT is determined as follows,
TOILCNT = 0 at idle switch ON
For TOILCNT at Idle switch off, refer to the following table.
| Vehicle speed km/h (MPH) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 0 (0) | 5 (3.1) | 10 (6.2) | 15 (9.3) | 20 (12.4) | 25 (15.5) | 30 (18.6) | 35 (21.7) | ||
| Lowest EOT °C (°F) | -20 (-4) | 0 | 16.6 | 20.3 | 24.6 | 36.1 | 50.9 | 67.2 | 80.9 |
| -10 (14) | 0 | 15 | 18.6 | 22.7 | 33 | 47 | 61 | 73.9 | |
| 0 (32) | 0 | 13.5 | 17 | 21 | 29.9 | 42.2 | 54.5 | 66.1 | |
| 10 (50) | 0 | 10.9 | 14.3 | 18.1 | 25.6 | 34.6 | 44.7 | 53.3 | |
| 20 (68) | 0 | 2.4 | 5.2 | 8.4 | 12.4 | 17.6 | 23.6 | 29.2 | |
After engine start oil temperature characteristic diagnosis timer judgment value (t)
t = 1829497 - 46830 x Ti (t ≥ 284107)
Ti = The lowest coolant temperature after starting the engine
Time Needed for Diagnosis: 250 - 550 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgment
Judge as OK and clear the NG if the following conditions are established.
| Malfunction Criteria | Threshold Value |
|---|---|
| Engine oil temperature | ≥ 50°C (122°F) |
Time Needed for Diagnosis: Less than 1 second
NO RELATED
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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.