Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001HT38
Model Year Start: 2020 Model: Corolla Prod Date Range: [03/2019 - 11/2022]
Title: 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: P0197,P0198; Engine Oil Temperature Sensor Low; 2020 - 2023 MY Corolla [03/2019 - 11/2022]

DTC

P0197

Engine Oil Temperature Sensor Low

DTC

P0198

Engine Oil Temperature Sensor High

DESCRIPTION

A thermistor, whose resistance changes in accordance with the engine oil temperature, is built into the engine oil temperature sensor. As the engine oil temperature decreases, the thermistor resistance increases and as the engine oil temperature increases, the thermistor resistance decreases. The engine oil temperature sensor is connected to the ECM. A voltage of 5 V is supplied from terminal THEO via resistor R of the ECM. Since resistor R and the engine oil temperature sensor are connected in series, both the resistance and the electrical potential of THEO are subject to change in accordance with a change in the engine oil temperature.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P0197

Engine Oil Temperature Sensor Low

Short in engine oil temperature sensor circuit (1 trip detection logic).

  • Short in engine oil temperature sensor circuit
  • Engine oil temperature sensor
  • ECM

Comes on

DTC stored

DTC for Mexico Models

- Applies

P0198

Engine Oil Temperature Sensor High

Open in engine oil temperature sensor circuit (1 trip detection logic).

  • Open in engine oil temperature sensor circuit
  • Engine oil temperature sensor
  • ECM

Comes on

DTC stored

DTC for Mexico Models

- Applies

MONITOR DESCRIPTION

The ECM monitors the engine oil temperature sensor and uses the sensor voltage to calculate the engine oil temperature. If the output voltage from the sensor deviates from the standard range, the ECM determines that the engine oil temperature sensor has malfunctioned and stores a DTC.

MONITOR STRATEGY

Related DTCs

P0197: Engine oil temperature sensor range check (low voltage)

P0198: Engine oil temperature sensor range check (high voltage)

Required Sensors/Components (Main)

Engine oil temperature sensor

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

3 seconds

MIL Operation

Immediately

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

P0197

Monitor runs whenever the following DTCs are not stored

None

All of the following conditions are met

-

Battery voltage

8 V or higher

Ignition switch

ON

Starter

Off

P0198

All of the following conditions are met

-

Battery voltage

8 V or higher

Ignition switch

ON

Starter

Off

Time after engine start

10 seconds or more

Engine coolant temperature sensor circuit fail (P0115, P0117, P0118)

Not detected

Intake air temperature sensor circuit fail (P0112, P0113)

Not detected

TYPICAL MALFUNCTION THRESHOLDS

P0197

Engine oil temperature sensor voltage [Engine oil temperature]

Less than 0.13 V [Higher than 166°C (331°F)]

P0198

Engine oil temperature sensor voltage [Engine oil temperature]

Higher than 4.94 V [Less than -55°C (-67°F)]

COMPONENT OPERATING RANGE

Engine oil temperature sensor voltage [Engine oil temperature]

0.13 to 4.94 V [-55 to 166°C (-67 to 331°F)]

CONFIRMATION DRIVING PATTERN

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the ignition switch off and wait for at least 30 seconds.
  6. Turn the ignition switch to ON.
  7. Turn the Techstream on.
  8. Start the engine and wait 10 seconds or more.
  9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
  10. Read the 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 and ECT / Utility / All Readiness.
  12. Input the DTC: P0197 or P0198.
  13. Check the DTC judgment result.

    Techstream Display

    Description

    NORMAL

    • DTC judgment completed
    • System normal

    ABNORMAL

    • DTC judgment completed
    • System abnormal

    INCOMPLETE

    • DTC judgment not completed
    • Perform driving pattern after confirming DTC enabling conditions

    N/A

    • Unable to perform DTC judgment
    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    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 judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs.

    Click here 2020 - 2022 MY Corolla [03/2019 - 09/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR 2023 MY Corolla [09/2022 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

    HINT:

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

WIRING DIAGRAM

CAUTION / NOTICE / HINT

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.

PROCEDURE

1.

READ VALUE USING TECHSTREAM (ENGINE OIL TEMPERATURE SENSOR)

(a) Connect the Techstream to the DLC3.

(b) Start the engine and warm it up.

(c) Turn the Techstream on.

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

Powertrain > Engine and ECT > Data List

Tester Display

Engine Oil Temperature Sensor

(e) Read the value displayed on the Techstream.

Standard value:

Between 80 and 110°C (176 and 230°F) with warm engine and engine idling

Result

Proceed to

-40°C (-40°F)

A

Higher than 166°C (331°F)

B

Between 80 and 110°C (176 and 230°F)

C

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 166°C (331°F).
B

GO TO STEP 4

C

CHECK FOR INTERMITTENT PROBLEMS

A

2.

READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN WIRE HARNESS)

(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.

*1

Engine Oil Temperature Sensor

*2

ECM

*a

Front view of wore harness connector

(to Engine Oil Temperature Sensor)

-

-

(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 and ECT / Data List / Engine Oil Temperature Sensor.

Powertrain > Engine and ECT > Data List

Tester Display

Engine Oil Temperature Sensor

(g) Read the value displayed on the Techstream.

Standard Value:

Higher than 166°C (331°F)

OK

REPLACE ENGINE OIL TEMPERATURE SENSOR

NG

3.

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

(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:

Tester Connection

Condition

Specified Condition

C42-2 - C77-89 (THEO)

Always

Below 1 Ω

C42-1 - C77-90 (ETHE)

Always

Below 1 Ω

C42-2 or C77-89 (THEO) - Other terminals

Always

10 kΩ or higher

OK

REPLACE ECM 2020 - 2022 MY Corolla [03/2019 - 09/2022]; 2ZR-FAE (ENGINE CONTROL): ECM: REMOVAL 2023 MY Corolla [09/2022 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): ECM: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.

READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN WIRE HARNESS)

(a) Disconnect the engine oil temperature sensor connector.

*1

Engine Oil Temperature Sensor

*2

ECM

(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 and ECT / Data List / Engine Oil Temperature Sensor.

Powertrain > Engine and ECT > Data List

Tester Display

Engine Oil Temperature Sensor

(f) Read the value displayed on the Techstream.

Standard Value:

-40°C (-40°F)

OK

REPLACE ENGINE OIL TEMPERATURE SENSOR

NG

5.

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

(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:

Tester Connection

Condition

Specified Condition

C42-2 or C77-89 (THEO) - Body ground and other terminals

Always

10 kΩ or higher

OK

REPLACE ECM 2020 - 2022 MY Corolla [03/2019 - 09/2022]; 2ZR-FAE (ENGINE CONTROL): ECM: REMOVAL 2023 MY Corolla [09/2022 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): ECM: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR