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Subaru Crosstrek Service Manual: Dtc p0196 engine oil temperature sensor "a" range/performance

ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC P0196 ENGINE OIL TEMPERATURE SENSOR "A" RANGE/PERFORMANCE

DTC DETECTING CONDITION:

Detected when two consecutive driving cycles with fault occur.

TROUBLE SYMPTOM:

Hard to start

Improper idling

Poor driving performance

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION">, and Inspection Mode Inspection Mode > PROCEDURE">.

STEPCHECKYESNO

1.CHECK FOR ANY OTHER DTC ON DISPLAY.

Is any other DTC displayed?

Check the appropriate DTC using the “List of Diagnostic Trouble Code (DTC)”. List of Diagnostic Trouble Code (DTC)">

Replace the engine oil temperature sensor. Engine Oil Temperature Sensor">

1. OUTLINE OF DIAGNOSIS

Detect the malfunction of the engine oil temperature sensor output properties. Using the following two diagnoses, judge as NG when either is NG.

Diagnosis 1 (correlation diagnosis): After the engine starts after the specified period of soaking time has elapsed, diagnose by correlation between engine oil temperature sensor value, engine coolant temperature sensor value and intake air temperature sensor value. Judge as NG when the differences are both above the specified value by comparing between engine oil temperature and engine coolant temperature, engine oil temperature and intake air temperature.

Diagnosis 2 (function diagnosis): Judge as NG when engine oil temperature does not rise to the specified value regardless of an engine running condition that clears certain conditions.

2. COMPONENT DESCRIPTION

(A)

Resistance value (k?)

(B)

Temperature °C (°F)

(1)

Connector

(2)

Thermistor element

3. EXECUTION CONDITION

Diagnosis 1

Secondary parameters

Execution condition

Battery voltage

≥ 10.9 V

Soaking time

≥ 21600 s

Block heater judgment

Completed

Block heater operation

Not in operation

Diagnosis 2

Secondary parameters

Execution condition

Battery voltage

≥ 10.9 V

Engine oil temperature at engine starting

< 50 &#x00B0;C (122 &#x00B0;F)

Engine speed

≥ 500 rpm

Percentage of idling

≤ 0.5 ? 100

4. GENERAL DRIVING CYCLE

Diagnosis 1: Perform the diagnosis only once after the engine starts after a certain period of soaking time.

Diagnosis 2: Perform the diagnosis only once after starting the engine from cold condition.

5. DIAGNOSTIC METHOD

Judge as NG when Diagnosis 1 or Diagnosis 2 becomes NG.

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

Diagnosis 1

Judgment value

Malfunction Criteria

Threshold Value

Absolute value

Engine oil temperature at engine start − Engine coolant temperature at engine start

> 10 &#x00B0;C (18&#x00B0;F)

Absolute value

Engine oil temperature at engine start − Intake air temperature 30 sec. after engine start

> Value of Map 1

Map 1

Ambient temperature

&#x00B0;C (&#x00B0;F)

−30

(−22)

30

(86)

45

(113)

60

(140)

|Engine oil temperature at engine start − Intake air temperature 30 sec. after engine start|

&#x00B0;C (&#x00B0;F)

10

(18)

10

(18)

22

(39.6)

22

(39.6)

Time needed for diagnosis: Less than 1 second

Diagnosis 2

Judgment value

Malfunction Criteria

Threshold Value

Engine oil temperature

< 50 &#x00B0;C (122 &#x00B0;F)

Elapsed time after starting the engine

≥ Value from Map 2

Map 2

Intake air temperature at engine start

&#x00B0;C (&#x00B0;F)

−40

(−40)

−30

(−22)

−20

(−4)

−10

(14)

0

(32)

10

(50)

20

(68)

30

(86)

Percentage of time when engine is at stop against time elapsed since engine start

0.0

3300000

2730000

2200000

1740000

1400000

1120000

800000

500000

0.3

3300000

2730000

2200000

1740000

1400000

1120000

800000

500000

0.6

3300000

2730000

2200000

1740000

1400000

1120000

800000

500000

1.0

3300000

2730000

2200000

1740000

1400000

1120000

800000

500000

ms

Time needed for diagnosis: Less than 1 second

Malfunction indicator light illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

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