Toyota
Nissan Versa
 Sedan Service Manual
Engine » Engine control system (EC) » P0196 EOT sensor
DTC Logic

DTC DETECTION LOGIC

NOTE: If DTC P0196 is displayed with DTC P0197 or P0198, first perform the trouble diagnosis for DTC P0197 or P0198. Refer to EC, "DTC Logic".

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0196 EOT SENSOR [Engine oil temperature (EOT) sensor circuit range/performance] A Rationally incorrect voltage from the sensor is sent to ECM, compared with the voltage signals from EOT sensor and intake air temperature sensor.
  • Harness or connectors (EOT sensor circuit is open or shorted)
  • EOT sensor
B The comparison result of signals transmitted to ECM from each temperature sensor (IAT sensor, ECT sensor, FTT sensor, and EOT sensor) shows that the signal voltage of the EOT sensor is higher/ lower than that of other temperature sensors when the engine is started with its cold state.
  • Harness or connectors (High or low resistance in the EOT sensor circuit)
  • EOT sensor

DTC CONFIRMATION PROCEDURE

1.INSPECTION START

Is it necessary to erase permanent DTC?

YES >> GO TO 6.

NO >> GO TO 2.

2.PRECONDITIONING

If DTC CONFIRMATION PROCEDURE has been previously conducted, always perform the following procedure before conducting the next test.

  1. Turn ignition switch OFF and wait at least 10 seconds.
  2. Turn ignition switch ON.
  3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION: Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.

>> GO TO 3.

3.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION AI

  1. Start engine and warm it up to normal operating temperature.
  2. Turn ignition switch OFF and wait at least 10 seconds.
  3. Turn ignition switch ON.
  4. Turn ignition switch OFF and wait at least 10 seconds.
  5. Start engine and let it idle for 5 minutes and 10 seconds.
  6. Check 1st trip DTC.

Is 1st trip DTC detected?

YES >> Proceed to EC, "Diagnosis Procedure".

NO >> GO TO 4.

4.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION AII

With CONSULT

  1. Select "DATA MONITOR" mode of "ENGINE" using CONSULT.
  2. Check that "COOLAN TEMP/S" indicates above 80C (176F). If it is above 80C (176F), go to the following steps.If it is below 80C (176F), warm engine up until "COOLAN TEMP/S" indicates more than 80C (176F).

    Then perform the following steps.

  3. Turn ignition switch OFF and soak the vehicle in a cool place.
  4. Turn ignition switch ON.

    NOTE: Do not turn ignition switch OFF until step 8.

  5. Select "DATA MONITOR" mode of "ENGINE" using CONSULT.
  6. Check the following.If they are within the specified range, perform the following steps.

    If they are out of the specified range, soak the vehicle to meet the above conditions. Then perform the following steps.

    NOTE: - Do not turn ignition switch OFF.

    - If it is supposed to need a long period of time, do not deplete the battery.

  1. Start engine and let it idle for 5 minutes.
  2. Check 1st trip DTC.

With GST

Follow the procedure "With CONSULT" above.

Is 1st trip DTC detected?

YES >> Proceed to EC, "Diagnosis Procedure".

NO >> GO TO 5.

5.PERFORM COMPONENT FUNCTION CHECK (FOR MALFUNCTION B)

Perform component function check. Refer to EC, "Component Function Check".

NOTE: Use the component function check to check the overall function of the EOT sensor circuit. During this check, a 1st trip DTC might not be confirmed.

Is the inspection result normal?

YES >> INSPECTION END

NO >> Proceed to EC, "Diagnosis Procedure".

6.PRECONDITIONING

If DTC CONFIRMATION PROCEDURE has been previously conducted, always perform the following procedure before conducting the next test.

  1. Turn ignition switch OFF and wait at least 10 seconds.
  2. Turn ignition switch ON.
  3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

  • Before performing the following procedure, do not add fuel.
  • Before performing the following procedure, check that fuel level is between 1/4 and 4/4.
  • Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.

>> GO TO 7.

7.PERFORM DTC CONFIRMATION PROCEDURE B

  1. Start engine and let it idle for 60 minutes.
  2. Move the vehicle to a cool place.

    NOTE: Cool the vehicle in an environment of ambient air temperature between −10C (14F) and 35C (95F).

  3. Turn ignition switch OFF and soak the vehicle for 12 hours.

    CAUTION: Never turn ignition switch ON during soaking. NOTE: The vehicle must be cooled with the food open.

  4. Start engine and let it idle for 5 minutes or more.

    CAUTION: Never turn ignition switch OFF during idling.

  5. Check 1st trip DTC.

Is 1st trip DTC detected?

YES >> Proceed to EC, "Diagnosis Procedure".

NO >> INSPECTION END

    More about «P0196 EOT sensor»:

    DTC Logic

    Component Function Check

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