Sfi System - P0118(2010/08 - )

1. Description

2. Wiring diagram

3. Inspection procedure

4. Read value using intelligent tester (coolant temp)

5. Read value using intelligent tester (check for open in wire harness)

6. Check harness and connector (engine coolant temperature sensor - ecm)

7. Read value using intelligent tester (check for short in wire harness)

8. Check harness and connector (engine coolant temperature sensor - ecm)

DTC P0115 Engine Coolant Temperature Circuit Malfunction

DTC P0117 Engine Coolant Temperature Circuit Low Input

DTC P0118 Engine Coolant Temperature Circuit High Input

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DESCRIPTION

HINT:

When any of DTCs P0115, P0117 or P0118 are set, the ECM enters fail-safe mode. During fail-safe mode, the engine coolant temperature is estimated to be 80°C (176°F) by the ECM. Fail-safe mode continues until a pass condition is detected.

HINT:

When any of these DTCs are set, check the engine coolant temperature by entering the following menus on the intelligent tester: Powertrain / Engine and ECT / Data List / All Data / Coolant Temp.

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

Read freeze frame data using the 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 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.

1. Connect the intelligent tester to the DLC3.

2. Turn the ignition switch to ON.

3. Turn the tester on.

4. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Coolant Temp.

5. Read the value displayed on the tester.

   Standard:

   Same as actual engine coolant temperature.
   

   
   

   Result:

   
   

   Result	Proceed to
   Displayed temperature is -40°C (-40°F)	A
   Displayed temperature is 140°C (284°F)	B
   Same as actual engine coolant temperature	C

   HINT:

   1. If there is an open circuit, the intelligent tester indicates -40°C (-40°F).
      
   2. If there is a short circuit, the intelligent tester indicates 140°C (284°F).
      

B	Go to step 4
C	CHECK FOR INTERMITTENT PROBLEMS (Click here)

A

1. Confirm good connection at the engine coolant temperature sensor connector.

   
   
   
   
   

   Text in Illustration

   *1	Engine Coolant Temperature Sensor	*2	ECM
   *3	Front view of wire harness connector (to Engine Coolant Temperature Sensor)	-	-

2. Disconnect the engine coolant temperature sensor connector.

3. Connect terminals 1 and 2 of the engine coolant temperature sensor connector on the wire harness side.

4. Connect the intelligent tester to the DLC3.

5. Turn the ignition switch to ON.

6. Turn the tester on.

7. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Coolant Temp.

8. Read the value displayed on the tester.

   Standard:

   140°C (284°F)
   

9. Reconnect the engine coolant temperature sensor connector.

NG	Go to step 3

OK
REPLACE ENGINE COOLANT TEMPERATURE SENSOR (Click here)

1. Disconnect the engine coolant temperature sensor connector.

2. Disconnect the ECM connector.

3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open):

   Tester Connection	Condition	Specified Condition
   C4-2 - C24-97 (THW)	Always	Below 1 Ω
   C4-1 - C24-96 (ETHW)	Always	Below 1 Ω

4. Reconnect the engine coolant temperature sensor connector.

5. Reconnect the ECM connector.

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)

OK
REPLACE ECM (Click here)

1. Disconnect the engine coolant temperature sensor connector.

   Text in Illustration

   *1	Engine Coolant Temperature Sensor
   *2	ECM

2. Connect the intelligent tester to the DLC3.

3. Turn the ignition switch to ON.

4. Turn the tester on.

5. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Coolant Temp.

6. Read the value displayed on the tester.

   Standard:

   -40°C (-40°F)
   

7. Reconnect the engine coolant temperature sensor connector.

NG	Go to step 5

OK
REPLACE ENGINE COOLANT TEMPERATURE SENSOR (Click here)

1. Disconnect the engine coolant temperature sensor connector.

2. Disconnect the ECM connector.

3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Short):

   Tester Connection	Condition	Specified Condition
   C4-2 or C24-97 (THW) - Body ground	Always	10 kΩ or higher

4. Reconnect the engine coolant temperature sensor connector.

5. Reconnect the ECM connector.

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)

OK
REPLACE ECM (Click here)