13117925-13117922-13117943-13117946-13117931-13117949-13117919-13117928-13117937-13117934-13117940

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 compensation 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 (ECM) compensates the oil-flow control valve operation time.

DTC DESCRIPTION

ECM sets DTC P0198 if the ECM detects signal voltage higher than the possible range of a properly operating OTS.

DTC DETECTING CONDITION

Item	Detecting Condition	Possible Cause
DTC Strategy	● Engine coolant temperature	● Open or short circuit to battery ● Contact resistance in connectors ● Faulty OTS
Enable Conditions	● Engine coolant temperature ＞ -10℃(14℉) ● No relevant failure ● 6V ＜ Battery Voltage
Threshold Value	● Oil temperature ＜ -36℃(-33℉)
Diagnostic Time	● 5 seconds
MIL On Condition	● 2 Driving Cycles

SIGNAL WAVEFORM AND DATA

SPECIFICATION

Temp.(℃)	Temp.(℉)	OTS Resistance(㏀)
-20	-4	Approx. 14.1 ~ 16.9
0	32	Approx. 6
20	68	Approx. 2.3 ~ 2.6
40	104	Approx. 1.1 ~ 1.2
60	140	Approx. 0.5
80	176	Approx. 0.3

SCHEMATIC DIAGRAM

MONITOR DTC STATUS

note

If any DTCs relating to OTS(Oil Temperature Sensor) or ECT(Engine Coolant Temperature)Sensor are stored, do ALL REPAIRS associated with those codes before proceeding with this troubleshooting tree.

Connect scan tool and select "Diagnostic Trouble Codes(DTCs)" mode.

Press F4(DTAL) to select DTC information from the DTCs menu.

Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions.

Read "DTC Status" parameter.

Is parameter displayed "History(Not Present) fault"?

note

History (Not Present) fault : DTC occurred but has been cleared.

Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

GROUND CIRCUIT INSPECTION

Ignition "OFF"

Disconnect OTS connector

Measure resistance between terminals 1 of the OTS harness connector and chassis ground

Specification : Approx. 0Ω

Is resistance within specification?

▶ Go to next step as below

▶ Repair open circuit and go to "Verification of Vehicle Repair" procedure

SIGNAL CIRCUIT INSPECTION

Check the signal circuit for short to battery

(1)

Disconnect ECM harness connector

(2)

Ignition "ON" ＆ Engine "OFF"

(3)

Measure voltage between terminal 2 of the OTS harness connector and chassis ground

Specification : Approx. 0V

(4)

Is voltage within specification?

▶ Go to next step as below.

▶ Check for short to battery in signal circuit. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Check the signal circuit for open

(1)

Ignition "OFF"

(2)

Measure resistance between terminals 2 of the OTS harness connector and 40 of the ECM harness connector.

Specification : Approx. 0Ω

(3)

Is voltage within the specification?

▶ Go to next step as below

▶ Check for open in signal circuit. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

TERMINAL AND CONNECTOR INSPECTION

Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.

Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Go to next step as below

COMPONENT INSPECTION

Ignition "OFF"

Disconnect OTS connector.

Measure resistance between terminals 1 and 2 of OTS connector.(Component side)

Specification

Temp.(℃)	Temp.(℉)	OTS Resistance(㏀)
-20	-4	Approx. 14.1 ~ 16.9
0	32	Approx. 6
20	68	Approx. 2.3 ~ 2.6
40	104	Approx. 1.1 ~ 1.2
60	140	Approx. 0.5
80	176	Approx. 0.3

Is resistance within the specification?

▶ Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Check OTS for contamination, deterioration, or damage. Substitute with a known-good OTS and check for proper operation. If the problem is corrected, replace OTS and then 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.

Connect scan tool and select "Diagnostic Trouble Codes(DTCs)" mode.

Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions.

Read "DTC Status" parameter.

Is parameter displayed "History(Not Present) fault"?

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

▶ Go to the applicable troubleshooting procedure.