P0196

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 CONDITIONS

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

4. DIAGNOSTIC METHOD




Abnormality Judgment
When the given conditions are established, it is NG.

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 count up by 64 milliseconds + TCILCNT milliseconds at every 64 milliseconds.

Where, TOILCNT is determined as follows.
TOILCNT = 0 at idle switch ON




For TOILCNT at Idle switch off, refer to the given table.
After engine start oil temperature characteristic diagnosis timer judgment value (t).
t = 2400000 - 60000 x Ti (t >= 2400000)
Ti = The lowest coolant temperature after starting the engine.
Time Needed for Diagnosis: Undecided
Malfunction Indicator Light Illumination: Illuminates when malfunctions occur in 2 continuous driving cycles.




Normality Judgment
When the given conditions are established, it is OK.

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 degrees C (158 degrees F).

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