READ OUTPUT DTCS (DTC P0115 AND/OR P0116)
READ VALUE USING INTELLIGENT TESTER (ENGINE COOLANT TEMPERATURE)
READ VALUE USING INTELLIGENT TESTER (CHECK FOR OPEN IN WIRE HARNESS)
CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)
READ VALUE USING INTELLIGENT TESTER (CHECK FOR SHORT IN WIRE HARNESS)
CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)
DTC P0115 Engine Coolant Temperature Circuit Malfunction |
DTC P0116 Engine Coolant Temperature Circuit Range / Performance Problem |
DESCRIPTION
A thermistor, whose resistance value varies according to the engine coolant temperature, is built into the engine coolant temperature sensor.The structure of the sensor and its connection to the ECM are the same as those of the intake air temperature sensor.
- УКАЗАНИЕ:
- When the engine coolant temperature sensor output is outside the normal range, the ECM determines this as a malfunction.
- If DTC P0115 or P0116 is detected, the ECM performs engine control using an estimated engine coolant temperature calculated from the intake air temperature and the intake air volume at the time of engine start.
| DTC No. | DTC Detection Condition | Trouble Area |
| P0115 | Condition (a) or (b) continues for 2 seconds or more: (a) Engine coolant temperature sensor output is less than -40°C (-40°F) (The MIL is illuminated and a DTC is immediately set when a malfunction is detected) (b) Engine coolant temperature sensor output is more than 140°C (284°F) (The MIL is illuminated and a DTC is immediately set when a malfunction is detected) |
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| P0116 |
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- УКАЗАНИЕ:
- When DTC P0115 or P0116 is detected, check the engine coolant temperature by selecting the following menu items on an intelligent tester: Powertrain / Engine and ECT / Data List / Coolant Temp.
- DTC P0115 is set when the engine idles for approximately 15 seconds.
- DTC P0116 is set when the vehicle idles for more than 5 minutes after driving at a vehicle speed of 100 to 120 km/h (62 to 75 mph) for more than 5 minutes.
| Temperature Displayed | Malfunction |
| -40°C (-40°F) | Open circuit |
| 140°C (284°F) or higher | Short circuit |
WIRING DIAGRAM
INSPECTION PROCEDURE
- УКАЗАНИЕ:
- Read freeze frame data using an intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
| 1.READ OUTPUT DTCS (DTC P0115 AND/OR P0116) |
Connect the intelligent tester to the DLC3.
Turn the ignition switch to the ON position.
Turn the tester on.
Enter the following menu items: Powertrain / Engine and ECT / DTC.
Read the DTCs.
- Result:
Result Proceed to DTC P0115, or P0115 and P0116 are output A DTC P0116 is output B
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| A | |
| 2.READ VALUE USING INTELLIGENT TESTER (ENGINE COOLANT TEMPERATURE) |
Connect the intelligent tester to the DLC3.
Turn the ignition switch to the ON position.
Turn the tester on.
Enter the following menu items: Powertrain / Engine and ECT / Data List / Coolant Temp.
Read the value.
- Standard:
- 80°C to 100°C (176°F to 212°F) with warm engine.
- Result:
Result Proceed to Temperature displayed -40°C (-40°F) A Temperature displayed 140°C (284°F) or higher B Temperature displayed between 80°C and 100°C (176°F and 212°F) C
- УКАЗАНИЕ:
- If there is an open circuit, the intelligent tester indicates -40°C (-40°F).
- If there is a short circuit, the intelligent tester indicates 140°C (284°F) or higher.
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| A | |
| 3.READ VALUE USING INTELLIGENT TESTER (CHECK FOR OPEN IN WIRE HARNESS) |
Disconnect the engine coolant temperature sensor connector.
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Connect terminals 1 and 2 of the engine coolant temperature sensor connector on the wire harness side.
Connect the intelligent tester to the DLC3.
Turn the ignition switch to the ON position.
Turn the tester on.
Enter the following menu items: Powertrain / Engine and ECT / Data List / Coolant Temp.
Read the value.
- Standard:
- 140°C (284°F) or higher.
Reconnect the engine coolant temperature sensor connector.
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| OK | ||
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| 4.CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM) |
Disconnect the engine coolant temperature sensor connector.
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Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection Condition Specified Condition B3-2 - B77-40 (THW) Always Below 1 Ω B3-1 - B77-29 (ETHW) Always Below 1 Ω
Reconnect the engine coolant temperature sensor connector.
Reconnect the ECM connector.
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| OK | ||
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| 5.READ VALUE USING INTELLIGENT TESTER (CHECK FOR SHORT IN WIRE HARNESS) |
Disconnect the engine coolant temperature sensor connector.
 |
Connect the intelligent tester to the DLC3.
Turn the ignition switch to the ON position.
Turn the tester on.
Enter the following menu items: Powertrain / Engine and ECT / Data List / Coolant Temp.
Read the value.
- Standard:
- -40°C (-40°F)
Reconnect the engine coolant temperature sensor connector.
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| OK | ||
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| 6.CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM) |
Disconnect the engine coolant temperature sensor connector.
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Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection Condition Specified Condition B3-2 - B77-40 (THW) Always 10 kΩ or higher
Reconnect the engine coolant temperature sensor connector.
Reconnect the ECM connector.
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| OK | ||
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