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P0197






FA20 ENGINE CONTROL: SFI SYSTEM: P0196-P0198; Engine Oil Temperature Sensor (Range/Performance); 2013 MY FR-S [03/2012 -]
P0196 - Engine Oil Temperature Sensor (Range/Performance)
P0197 - Engine Oil Temperature Sensor Low
P0198 - Engine Oil Temperature Sensor High

DESCRIPTION

The resistance of the thermistor within the oil temperature sensor changes in accordance with variations in the oil temperature. The method for connecting the oil temperature sensor and the ECM is the same as for the intake air temperature sensor.

HINT
If any DTC is stored, the ECM enters fail-safe mode. During operation of fail-safe mode, the ECM sets the engine oil temperature determined value at 70°C (158°F). Operation of fail-safe mode continues until the ECM restores normal operation.





MONITOR DESCRIPTION

P0196

When a cold engine start is performed and then the engine is warmed up, if the Engine oil temperature sensor value is less than specified value, it is determined that a malfunction has occurred. If this is detected in 2 consecutive driving cycles, the ECM interprets this as a malfunction in the engine oil temperature sensor and stores a DTC.

P0197, P0198

The ECM monitors the sensor voltage and uses this value to calculate the engine oil temperature. When the sensor output voltage deviates from the normal operating range, the ECM interprets this as a malfunction in the engine oil temperature sensor circuit and stores a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

P0196





P0197, P0198





TYPICAL MALFUNCTION THRESHOLDS

P0196





P0197





P0198





COMPONENT OPERATING RANGE





CONFIRMATION DRIVING PATTERN





1. Connect the Techstream to the DLC3.

2. Turn the ignition switch to ON and turn the Techstream on.

3. Clear DTCs (even if no DTCs are stored, perform the clear DTC operation) Reading and Clearing Diagnostic Trouble Codes.

4. Turn the ignition switch off and wait for at least 30 seconds.

5. Turn the ignition switch to ON and turn the Techstream on.

6. Start the engine and warm it up until the engine oil temperature reaches 75°C (167°F) or higher.

7. With the vehicle stationary, depress the accelerator pedal and maintain an engine speed of between 2500 and 3000 rpm for 40 seconds or more [A].

8. Drive the vehicle at 10 km/h (6.25 mph) or more for 1 minute or more [B].

CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.

9. Enter the following menus: Powertrain / Engine / Trouble Codes.

10. Read pending DTCs.

HINT
* If a pending DTC is output, the system is malfunctioning.
* If a pending DTC is not output, perform the following procedure.

11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

12. Input the DTC: P0196, P0197 or P0198.

13. Check the DTC judgment result.





HINT
* If the judgment result shows NORMAL, the system is normal.
* If the judgment result shows ABNORMAL, the system has a malfunction.

14. If the test result is INCOMPLETE or N/A and no DTC is output, perform a universal trip and check for permanent DTCs Reading and Clearing Diagnostic Trouble Codes.

HINT
* If a permanent DTC is output, the system is malfunctioning.
* If no permanent DTC is output, the system is normal.

WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
* Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
* When the DTC is output, check the engine oil temperature using the Techstream. Enter the following menus: Powertrain / Engine / Data List / Engine Oil Temperature. If the Engine Oil Temperature value is lower than the actual engine oil temperature, the engine oil temperature sensor circuit may be malfunctioning. In this case, check the wire harnesses and connectors (and those connections) between the ECM and the engine oil temperature sensor first.

PROCEDURE

1. READ VALUE USING TECHSTREAM (ENGINE OIL TEMPERATURE)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Data List / Engine Oil Temperature.

(e) Read the value displayed on the Techstream.

Result





HINT
* If there is an open circuit, the Techstream indicates -40°C (-40°F).
* If there is a short circuit, the Techstream indicates higher than 215°C (419°F).

B -- READ VALUE USING TECHSTREAM (ENGINE OIL TEMPERATURE)

C -- CHECK INTERMITTENT PROBLEMS Check For Intermittent Problems
A -- Continue to next step.

2. READ VALUE USING TECHSTREAM (ENGINE OIL TEMPERATURE)

(a) Disconnect the Engine oil temperature sensor connector.









(b) Connect terminals 1 and 2 of the Engine oil temperature sensor connector on the wire harness side.

(c) Connect the Techstream to the DLC3.

(d) Turn the ignition switch to ON.

(e) Turn the Techstream on.

(f) Enter the following menus: Powertrain / Engine / Data List / Engine Oil Temperature.

(g) Read the value displayed on the Techstream.

Standard value:

215°C (419°F)

NG -- CHECK HARNESS AND CONNECTOR (ECM - ENGINE OIL TEMPERATURE SENSOR)

OK -- REPLACE ENGINE OIL TEMPERATURE SENSOR Removal

3. CHECK HARNESS AND CONNECTOR (ECM - ENGINE OIL TEMPERATURE SENSOR)

(a) Disconnect the engine oil temperature sensor connector.

(b) Disconnect the ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for open):





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR

OK -- REPLACE ECM Removal

4. READ VALUE USING TECHSTREAM (ENGINE OIL TEMPERATURE)

(a) Disconnect the Engine oil temperature sensor connector.









(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / Engine / Data List / Engine Oil Temperature.

(f) Read the value displayed on the Techstream.

Standard Value:

-40°C (-40°F)

NG -- CHECK HARNESS AND CONNECTOR (ECM - ENGINE OIL TEMPERATURE SENSOR)

OK -- REPLACE ENGINE OIL TEMPERATURE SENSOR Removal

5. CHECK HARNESS AND CONNECTOR (ECM - ENGINE OIL TEMPERATURE SENSOR)

(a) Disconnect the engine oil temperature sensor connector.

(b) Disconnect the ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for short):





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR

OK -- REPLACE ECM Removal
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