- DTC judgment completed
- System normal
| 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). |
|
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). |
|
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
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the ignition switch off and wait for at least 30 seconds.
- Turn the ignition switch to ON.
- Turn the Techstream on.
- Start the engine and wait 10 seconds or more.
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
-
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.
- Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
- Input the DTC: P0197 or P0198.
-
Check the DTC judgment result.
Techstream Display
Description
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.
-
If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs.
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![2020 - 2022 MY Corolla [03/2019 - 09/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
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 |
|
| C |
|
|
|
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 |
|
|
|
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
|
| 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. |
|
(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 |
|
|
|
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
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|