DTC P0197 / P0198
Precautions: General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
P0197: Engine Oil Temperature Sensor Circuit Low Output voltage of oil temperature sensor signal circuit is lower than 0.03 V. (3 D/C detection logic but MIL does not light up) |
•Oil temperature sensor and/or its circuit
•ECM |
|
P0198: Engine Oil Temperature Sensor Circuit High Output voltage of oil temperature sensor signal circuit is higher than 4.64 V. (3 D/C detection logic but MIL does not light up) |
Circuit Diagram
| [A]: | ECM connector (View: [a]) | A2: | Oil temperature sensor ground circuit | 2. | ECM |
| A1: | Oil temperature sensor signal circuit | 1. | Oil temperature sensor |
DTC Confirmation Procedure
P0197
NOTE:
Check that the following DTC is not detected in this “DTC Confirmation Procedure”.
•Engine oil temperature sensor (P0198)
1)Warm up engine to normal operating temperature.
2)Run engine at idle speed for 1 min.
P0198
NOTE:
Check that the following DTC is not detected in this “DTC Confirmation Procedure”.
•Engine oil temperature sensor (P0197)
1)Warm up engine to normal operating temperature.
2)Run engine at idle speed for 1 min.
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Was “Engine and Emission Control System Check” performed?
|
Go to Step 2.
|
|
| 2 |
Oil temperature sensor signal circuit and ground circuit check
1)With ignition “OFF”, disconnect “C01” and “E01” connectors of ECM and oil temperature sensor connector.
2)Check for proper terminal connection to “C01” and “E01” connectors and oil temperature sensor connector.
3)If connections are OK, check the following points.
•Resistance of “A1” and “A2” circuits: less than 1 Ω
•Resistance between each of “A1” and “A2” circuits and ground: infinity •Resistance between “A1” circuit terminal and “A2” circuit terminal at oil temperature sensor connector: infinity •Voltage of “A1” and “A2” circuits: approx. 0 V (When ignition is “ON”) Is check result OK?
|
Go to Step 3.
|
Repair or replace defective wire harness.
|
| 3 |
Oil temperature sensor check
1)Check oil temperature sensor.
Is check result OK?
|
Replace ECM and recheck DTC.
|
Replace oil temperature sensor.
|