ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC P0197 ENGINE OIL TEMPERATURE SENSOR "A" CIRCUIT LOW
DTC detecting condition:
Immediately at fault recognition
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">.
Wiring diagram:
Engine electrical system Engine Electrical System">
STEP | CHECK | YES | NO |
1.CHECK CURRENT DATA.
1) Start the engine.
2) Read the value of «Oil Temperature» using Subaru Select Monitor.
NOTE:
For detailed operation procedures, refer to “Current Data Display For Engine”. Subaru Select Monitor">
Is the value of «Oil Temperature» 150°C (302°F) or more?
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0197 ENGINE OIL TEMPERATURE SENSOR "A" CIRCUIT LOW">Go to Step 2.
Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.
NOTE:
In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
2.CHECK HARNESS BETWEEN ECM AND ENGINE OIL TEMPERATURE SENSOR CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM.
3) Disconnect the connectors from the engine oil temperature sensor.
4) Measure the resistance between ECM connector and chassis ground.
Connector & terminal
(B134) No. 20 — Chassis ground:
Is the resistance 1 M? or more?
Replace the engine oil temperature sensor. Engine Oil Temperature Sensor">
Repair the short circuit to ground in the harness between the ECM connector and engine oil temperature sensor connector.
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of the oil temperature sensor.
Judge as NG when outside of the judgment value.
2. COMPONENT DESCRIPTION
(A) | Resistance value (k?) | (B) | Temperature °C (°F) | ||
(1) | Connector | (2) | Thermistor element |
3. EXECUTION CONDITION
Secondary Parameters | Execution condition |
None |
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
5. DIAGNOSTIC METHOD
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Malfunction Criteria | Threshold Value |
Output voltage | < 0.203 V |
Time Needed for Diagnosis: 500 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
Self-check screen
When the ignition switch is turned to the
"ON" position, the vehicle self-check will
be performed. The screens corresponding
to the following items will appear one after
another for several seconds each.
Engine oil: Checks the interval of engine
oil replacement.
Oil filter: Checks th ...
Monitor (if equipped)
To clean the audio/navigation/multi function
display monitor, wipe it with a silicone
cloth or with a soft cloth. If the monitor is
extremely dirty, clean it with a soft cloth
moistened with neutral detergent then
carefully wipe off any remaining detergent.
CAUTION
Do not spray neutral det ...
Climate control panel, audio panel, instrument panel, console panel, and
switches
Use a soft, damp cloth to clean the climate
control panel, audio equipment, instrument
panel, center console, combination
meter panel, and switches.
CAUTION
Do not use organic solvents such
as paint thinners or fuel, or
strong cleaning agents that contain
those solvents. Doing so
cou ...