VERACRUZ(EN) >2009 > G 3.8 DOHC > Fuel System > Engine Control System>P0196 Engine Oil Temperature Sensor-Range / Performance  
Component Location

General Description
The fluid of the CVVT is the engine oil and its density changes according to the engine oil temperature. At this time the Oil Temperature Sensor (OTS) helps compensate against the temperature differences. The Oil Temperature Sensor measures the engine oil temperature before the engine oil comes into the Oil-flow Control Valve (OCV).
According to the measured temperature, the Engine Control Module (PCM) compensates the oil-flow control valve operation time.
DTC Description
Checking the oil temperture , coolant temperature and intake air temperature every 25 sec. under detecting condition, if the difference in temperature at start-up exceeds threshold value, PCM sets P0196. MIL(Malfunction Indication Lamp) turns on when the malfunction lasts till consecutive 2 driving cycle.
DTC DETECTING CONDITION
Item
 Detecting Condition
 Possible cause
DTC Strategy
•
Determines if the oil temperature value is rational, compared to coolant and intake air temperature.
•
Faulty OTS
•
PCM
Enable
Conditions
 Case1
•
Engine run time after startup < 30 sec
•
Soak period required > 300 min
Case2
•
Minimum engine run time > 800 sec
Threshold value
 Case1
•
The difference in temperature between oil and coolant temperatures at startup. > 35°C(63°F)
Case2
•
The difference in temperature between oil temperature and intake air temperature at startup amp;amp;gt; 35°C(63°F)
Diagnosis Time
•
Continuous
(More than 800 sec.)
MIL On Condition
•
2 driving cycles

Specification
Temperature(°C/°F)
 Resistance(kΩ)
-20°C/ -4°F
 16.52kΩ
20°C/ 68°F
 2.45kΩ
80°C/ 176°F
 0.29kΩ

Schematic Diagram

Monitor DTC Status
1.
Check DTC Status
(1)
Connect scantool to Data Link Connector(DLC).
(2)
IG "ON".
(3)
Select "DTC" button, and then Press "DTC Status" to check DTC's information from the DTCs menu.
(4)
Read "DTC Status" parameter.

(5)
Is parameter displayed "Present fault"?

 ▶ Go to "Component Inspection" procedure.

 ▶ Fault is intermittent caused by PCM memory was not cleared after repair. Erase DTC and drive the vehicle to satisfy the enable condition then, go to " Component Inspection" procedure.

Component Inspection
■ Check OTS Resistance
1.
IG "ON" & ENG "OFF"
2.
Monitor Oil Temperature parameter on the scantool
3.
IG "OFF" & ENG "OFF"
4.
Disconnect OTS connector.
5.
Measure resistance between signal and ground terminals of OTS connector after checking out the oil temperature with scantool.
Specification :
Temperature(°C/°F)
 Resistance(kΩ)
-20°C/ -4°F
 16.52kΩ
20°C/ 68°F
 2.45kΩ
80°C/ 176°F
 0.29kΩ

6.
Is the measured resistance within specification ?

 ▶ Go to "Verification of Vehicle Repair" procedure.

 ▶ Substitute with a known - good OTS and check for proper operation. If the problem is corrected, replace OTS and go to "Verification of Vehicle Repair" procedure.

Verification Of Vehicle Repair
After a repair, it is essential to verify that the fault has been corrected.
1.
Connect scantool and select "DTC" button.
2.
Press "DTC Status" button and confirm that "DTC Readiness Flag" indicates "Completed". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions
3.
Read "DTC Status" parameter
4.
Is parameter displayed "History(Not Present) fault"?

 ▶ System performing to specification at this time. Clear the DTC

 ▶ Go to the applicable troubleshooting procedure.