DTC - General Description

DTC P0196 ENGINE OIL TEMPERATURE SENSOR CIRCUIT RANGE/ PERFORMANCE

1. OUTLINE OF DIAGNOSIS
Detect for abnormal values in the oil temperature sensor output properties.
Judge as NG when the oil temperature does not rise even though the engine is running under a condition where it should rise.

2. ENABLE CONDITION






Map






3. GENERAL DRIVING CYCLE
Perform the diagnosis continuously after starting the engine.

4. DIAGNOSTIC METHOD

- Abnormality Judgment
Judge as NG when the following conditions are established.






After engine start oil temperature sensor characteristic diagnosis timer (timer for diagnosis).
a. Timer stop at fuel cut
b. During the driving conditions except a) above, timer counts up as follows.
64 milliseconds + TOILCNT milliseconds (at the time of 64 milliseconds).
Where, TOILCNT is determined as follows,
TOILCNT = 0 at idle switch ON
For TOILCNT at Idle switch off, refer to the following table.






After engine start oil temperature characteristic diagnosis timer judgment value (t).
t = 2400000 ms - 60000 ms/° C x Ti (t ≥ 2400000)
Ti = The lowest coolant temperature after starting the engine.
Time Needed for Diagnosis: Less than 1 second
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.






Time Needed for Diagnosis: Less than 1 second

5. DTC CLEAR CONDITION
- When the OK idling cycle is completed 40 times in a row
- When "Clear Memory" is performed

6. MALFUNCTION INDICATOR LIGHT CLEAR CONDITIONS
- When the OK driving cycle is completed 3 times in a row
- When "Clear Memory" is performed

7. FAIL SAFE
Oil temperature sensor process: Engine oil temperature is fixed at 70° C (158° F).

8. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)