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 CONDITION

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

4. DIAGNOSTIC METHOD







Abnormality Judgment
When the following conditions are established, judged as NG.
After engine start oil temperature sensor characteristic diagnosis timer (timer for diagnosis).
a. Timer stop at fuel cut mode.
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.




Normality Judgment
When the following conditions are established, judged as 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 CONDITION
- 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)