P0196 Engine Oil Temperature Sensor-Range / Performance - Automotive Repair Guides & Equipment

COMPONENT LOCATION

GENERAL DESCRIPTION

The CVVT uses the engine oil to change the cam timing and its density changes according to the engine temperature. The Oil Temperature Sensor (OTS) signal is used by the ECM to compensation for the temperature differences. The Oil Temperature Sensor measures the engine oil temperature before the engine oil flows into the Oil-flow Control Valve (OCV). According to the measured temperature, the Engine Control Module (ECM) 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, ECM sets P0196.

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.

1.	Faulty OTS

Enable
Conditions

Case 1

Engine run time after startup < 30 sec

Soak period required > 300 min

Case 2

Minimum engine run time > 800 sec

Threshold value

Case 1

The difference in temperature between oil and coolant temperatures at startup. > 35°C(63°F)

Case 2

The difference in temperature between oil temperature and intake air temperature at startup > 35°C(63°F)

Diagnosis Time

Continous (More than 800 sec.)

MIL On Condition

NO MIL ON(DTC only)

SPECIFICATION

Temperature(°C/°F)	Resistance(kΩ)
-40°C	52.15kΩ
-20°C	16.52kΩ
0°C	6.0kΩ
20°C	2.45kΩ
40°C	1.11kΩ
60°C	0.54kΩ
80°C	0.29kΩ

DIAGNOSTIC CIRCUIT DIAGRAM

SIGNAL WAVEFORM & DATA

Fig.1) Normal data of IATS & ECTS & EOTS at ig on

Fig.2) Normal data of IATS & ECTS & EOTS after warming up.

Fig.3) Normal waveform of EOTS at 76°C (168.4°F)

MONITOR GDS DATA

1.	Connect GDS to Data Link Connector(DLC).

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.

Is parameter displayed “Present fault”?

	▶ Go to “Component Inspection” procedure.
	▶ Fault is intermittent caused by ECM 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 “OFF” and disconnect OTS connector.

Measure resistance between signal and ground terminals of OTS connector after checking out the temperature of EOTS with GDS (Component Side)

Specification :

Temperature(°C/°F)	Resistance(kΩ)
-40°C	52.15kΩ
-20°C	16.52kΩ
0°C	6.0kΩ
20°C	2.45kΩ
40°C	1.11kΩ
60°C	0.54kΩ
80°C	0.29kΩ

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

New Videos on our YouTube Channel Every Week, Subscribe Now!

Related Posts