DTC Code | DTC Name |
---|---|
P0117 | Engine Coolant Temperature Circuit Low Input |
P0118 | Engine Coolant Temperature Circuit High Input |
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 connection to the ECM is the same as the intake air temperature sensor.
When the engine coolant temperature sensor output is outside the normal range, the ECM determines that there is a malfunction.
If DTC P0117 or P0118 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. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
---|---|---|---|---|---|
P0117 | Engine Coolant Temperature Circuit Low Input |
Engine coolant temperature sensor output is higher than 120°C (248°F). (2 trip detection logic) |
|
Comes on | DTC stored |
P0118 | Engine Coolant Temperature Circuit High Input |
Engine coolant temperature sensor output is lower than -30°C (-22°F). (2 trip detection logic) |
|
Comes on | DTC stored |
DTC No. | DTC Detection Drive Pattern |
---|---|
P0117 | Ignition switch ON for approximately 15 seconds |
P0118 |
DTC No. | Data List |
---|---|
P0117 | Coolant Temp |
P0118 |
If DTC P0117 or P0118 is stored, the following symptoms may appear:
Misfire
Combustion noise increases
Black smoke
White smoke
Lack of power
When DTC P0117 or P0118 is stored, check the engine coolant temperature by entering the following menus on the GTS: Powertrain / Engine and ECT / Data List / Coolant Temp.
Temperature Displayed | Malfunction |
---|---|
-30°C (-22°F) or less | Open circuit |
120°C (248°F) or higher | Short circuit |
WIRING DIAGRAM
*a | Engine Coolant Temperature Sensor |
CAUTION / NOTICE / HINT
When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing a new ECM, perform all of the initialization and registration procedures for the "Learning Values Write" function by following the instructions shown on the GTS display.
Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.
PROCEDURE
READ VALUE USING GTS (COOLANT TEMP)
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp.
Powertrain > Engine and ECT > Data ListTester Display |
---|
Coolant Temp |
Read the value.
Standard |
---|
75 to 100°C (167 to 212°F) with warm engine. |
Result | ||||||||
---|---|---|---|---|---|---|---|---|
|
If there is an open circuit, the GTS indicates -30°C (-22°F) or less.
If there is a short circuit, the GTS indicates 120°C (248°F) or higher.
B | Нажмите здесь |
C | Нажмите здесь |
GO TO STEP 4 |
A |
READ VALUE USING GTS (CHECK FOR OPEN IN WIRE HARNESS)
Disconnect the engine coolant temperature sensor connector.
Connect terminals B166-1 and B166-2 of the engine coolant temperature sensor connector on the wire harness side.
*1 | Engine Coolant Temperature Sensor |
*2 | ECM |
*a |
Front view of wire harness connector (to Engine Coolant Temperature Sensor) |
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp.
Powertrain > Engine and ECT > Data ListTester Display |
---|
Coolant Temp |
Read the value.
Standard |
---|
120°C (248°F) or higher. |
Result | |||
---|---|---|---|
|
NG | Нажмите здесь |
OK |
CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE ENGINE COOLANT TEMPERATURE SENSOR
Replace the engine coolant temperature sensor.
Click hereНажмите здесь
Result | ||
---|---|---|
|
NEXT |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs.
Powertrain > Engine and ECT > Clear DTCsTurn the ignition switch off and wait for 30 seconds or more.
Turn the ignition switch to ON and wait for 15 seconds or more.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.
Confirm that the pending DTC is not output again.
Powertrain > Engine and ECT > Trouble CodesResult | ||
---|---|---|
|
NEXT |
END |
CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)
Disconnect the engine coolant temperature sensor connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG | Нажмите здесь |
OK |
CONFIRM ECM (GOOD CONNECTION TO ECM. IF OK, REPLACE ECM)
Replace the ECM.
Click hereНажмите здесь
Result | ||
---|---|---|
|
NEXT | Нажмите здесь |
GO TO STEP 4 |
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result | ||
---|---|---|
|
NEXT | Нажмите здесь |
GO TO STEP 4 |
READ VALUE USING GTS (CHECK FOR SHORT IN WIRE HARNESS)
Disconnect the engine coolant temperature sensor connector.
Connect the GTS to the DLC3.
*1 | Engine Coolant Temperature Sensor |
*2 | ECM |
Turn the ignition switch to ON and turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp.
Powertrain > Engine and ECT > Data ListTester Display |
---|
Coolant Temp |
Read the value.
Standard |
---|
-30°C (-22°F) or less. |
Result | |||
---|---|---|---|
|
NG | Нажмите здесь |
OK |
REPLACE ENGINE COOLANT TEMPERATURE SENSOR
Replace the engine coolant temperature sensor.
Click hereНажмите здесь
Result | ||
---|---|---|
|
NEXT | Нажмите здесь |
GO TO STEP 4 |
CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)
Disconnect the engine coolant temperature sensor connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG | Нажмите здесь |
GO TO STEP 7 |
OK |
REPLACE ECM
Replace the ECM.
Click hereНажмите здесь
Result | ||
---|---|---|
|
NEXT | Нажмите здесь |
GO TO STEP 4 |