ECD SYSTEM(for Swirl Control Valve), Diagnostic DTC:P0117 and P0118

DTC Code	DTC Name
P0117	Engine Coolant Temperature Sensor 1 Circuit Low
P0118	Engine Coolant Temperature Sensor 1 Circuit High

DESCRIPTION

A thermistor is built into the Engine Coolant Temperature (ECT) sensor and it changes its resistance value according to the engine coolant temperature.

The structure of the sensor and connection to the ECM are the same as the intake air temperature sensor.


DTC No.	DTC Detection Condition	Trouble Area
P0117	Engine coolant temperature sensor output voltage is 0.2 V or less for 0.6 seconds. (3 trip detection logic)	Open or short in engine coolant temperature sensor circuit Engine coolant temperature sensor ECM


DTC No.	DTC Detection Condition	Trouble Area
P0118	Engine coolant temperature sensor output voltage is 4.98 V or higher for 0.6 seconds. (3 trip detection logic)	Open or short in engine coolant temperature sensor circuit Engine coolant temperature sensor ECM

Table 1. Related Data List
DTC No.	Data List
P0117 P0118	Coolant Temp

WIRING DIAGRAM

CAUTION / NOTICE / HINT

Note:

When replacing the ECM, the ECM needs Registration and Initialization (Click here).

Tip:

When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing the new ECM, perform all of the initialization/registrations 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.

Read the value.

Standard value

80 to 100°C (176 to 212°F) with warm engine.

Table 2. Result
Result	Proceed to
-40°C (-40°F)	A
145°C (293°F) or higher	B
Between 80 to 100°C (176 to 212°F)	C

Tip:

If there is an open circuit, the GTS indicates -40°C (-40°F).
If there is a short circuit, the GTS indicates 145°C (293°F) or higher.

READ VALUE USING GTS (CHECK FOR SHORT IN WIRE HARNESS)Click here

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

READ VALUE USING GTS (CHECK FOR OPEN IN WIRE HARNESS)
1. Disconnect the engine coolant temperature sensor connector.
2. Connect terminals C100-2 (E2) and C100-1 (THW) of the engine coolant temperature sensor on the wire harness side.
3. Connect the GTS to the DLC3.
4. Turn the ignition switch to ON and turn the GTS on.
5. Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp.
6. Read the value.
  
  Standard value
  
  145°C (293°F) or higher
CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE ENGINE COOLANT TEMPERATURE SENSORClick here

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


Tester Connection	Condition	Specified Condition
C100-1 (THW) - C112-82 (THW)	Always	Below 1 Ω
C100-2 (E2) - C112-113 (ETHW)	Always	Below 1 Ω

CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECMClick here

REPAIR OR REPLACE HARNESS OR CONNECTORClick here

READ VALUE USING GTS (CHECK FOR SHORT IN WIRE HARNESS)
1. Disconnect the engine coolant temperature sensor connector.
2. Connect the GTS to the DLC3.
3. Turn the ignition switch to ON and turn the GTS on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp.
5. Read the value.
  
  Standard value
  
  -40°C (-40°F)
REPLACE ENGINE COOLANT TEMPERATURE SENSORClick here

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


Tester Connection	Condition	Specified Condition
C100-1 (THW) or C112-82 (THW) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTORClick here

REPLACE ECM
1. Replace the ECM (Click here).
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here
CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE ENGINE COOLANT TEMPERATURE SENSOR
1. Replace the engine coolant temperature sensor (Click here).
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here
REPAIR OR REPLACE HARNESS OR CONNECTOR
1. Repair or replace the harness or connector.
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here
CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM
1. Replace the ECM (Click here).
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here
REPLACE ENGINE COOLANT TEMPERATURE SENSOR
1. Replace the engine coolant temperature sensor (Click here).
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
1. Connect the GTS to the DLC3.
2. Turn the ignition switch to ON and turn the GTS on.
3. Clear the DTCs (Click here).
4. Turn the ignition switch off and wait for 60 seconds or more [A].
5. Perform road test [B].
6. Repeat [A] and [B] for the number of trips detected.
7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
8. Confirm that the DTC is not output again.
END