Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VIAL
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 08/2016]
Title: 2GR-FE (ENGINE CONTROL): SFI SYSTEM: P0115,P0117,P0118; Engine Coolant Temperature Circuit; 2016 MY Sienna [12/2015 - 08/2016]

DTC

P0115

Engine Coolant Temperature Circuit

DTC

P0117

Engine Coolant Temperature Circuit Low Input

DTC

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 its connection to the ECM are similar to those of the intake air temperature sensor.

HINT:

When any of DTCs P0115, P0117 or P0118 is stored, 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.

DTC No.

DTC Detection Condition

Trouble Area

P0115

Open or short in engine coolant temperature sensor circuit for 0.5 seconds

(1 trip detection logic)
  • Open or short in engine coolant temperature sensor circuit
  • Engine coolant temperature sensor
  • ECM

P0117

Short in engine coolant temperature sensor circuit for 0.5 seconds

(1 trip detection logic)
  • Short in engine coolant temperature sensor circuit
  • Engine coolant temperature sensor
  • ECM

P0118

Open in engine coolant temperature sensor circuit for 0.5 seconds

(1 trip detection logic)
  • Open in engine coolant temperature sensor circuit
  • Engine coolant temperature sensor
  • ECM

HINT:

When any of these DTCs are output, check the engine coolant temperature by entering the following menus on the Techstream: Powertrain / Engine / Data List / Coolant Temp.

Temperature Displayed

Malfunction

-40°C (-40°F)

Open circuit

Higher than 135°C (275°F)

Short circuit

MONITOR DESCRIPTION

  • The engine coolant temperature sensor is used to monitor the engine coolant temperature. The engine coolant temperature sensor has a thermistor with a resistance that varies according to the temperature of the engine coolant. When the coolant temperature becomes low, the resistance in the thermistor increases. When the temperature becomes high, the resistance drops. These variations in resistance are reflected in the output voltage from the sensor. The ECM monitors the sensor voltage and uses this value to calculate the engine coolant temperature. When the sensor output voltage deviates from the normal operating range, the ECM interprets this as a malfunction in the engine coolant temperature sensor and stores a DTC.
    • Example:
      • If the sensor output voltage is higher than 4.91 V for 0.5 seconds or more, the ECM determines that there is an open in the engine coolant temperature sensor circuit, and stores DTC P0118. Conversely, if the voltage output is less than 0.14 V for 0.5 seconds or more, the ECM determines that there is a short in the sensor circuit, and stores DTC P0117.
      • If the malfunction is not repaired successfully, a DTC is stored 0.5 seconds after the engine is next started.

MONITOR STRATEGY

Related DTCs

P0115: Engine coolant temperature sensor range check (Chattering)

P0117: Engine coolant temperature sensor range check (Low voltage)

P0118: Engine coolant temperature sensor range check (High voltage)

Required Sensors/Components (Main)

Engine coolant temperature sensor

Required Sensors/Components (Sub)

-

Frequency of Operation

Continuous

Duration

0.5 seconds

MIL Operation

Immediately

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever following DTCs are not present

None

TYPICAL MALFUNCTION THRESHOLDS

P0115

Engine coolant temperature sensor voltage

Less than 0.14 V, or higher than 4.91 V [Higher than 135°C (275°F), or less than -60°C (-76°F)]

P0117

Engine coolant temperature sensor voltage

Less than 0.14 V [Higher than 135°C (275°F)]

P0118

Engine coolant temperature sensor voltage

Higher than 4.91 V [Less than -60°C (-76°F)]

COMPONENT OPERATING RANGE

Engine coolant temperature sensor voltage

0.14 V or higher, and 4.91 V or less [-60°C (-76°F) or higher, and 135°C (275°F) or less]

CONFIRMATION DRIVING PATTERN

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON and turn the Techstream on.
  3. Clear DTCs (even if no DTCs are stored, perform the clear DTC procedure) (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR ).
  4. Turn the ignition switch off and wait for at least 30 seconds.
  5. Turn the ignition switch to ON and turn the Techstream on.
  6. Wait 0.5 seconds or more.
  7. Enter the following menus: Powertrain / Engine / Trouble Codes.
  8. Read pending DTCs.

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  9. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  10. Input the DTC: P0115, P0117 or P0118.
  11. Check the DTC judgment result.

    Techstream Display

    Description

    NORMAL
    • DTC judgment completed
    • System normal

    ABNORMAL
    • DTC judgment completed
    • System abnormal

    INCOMPLETE
    • DTC judgment not completed
    • Perform driving pattern after confirming DTC enabling conditions

    N/A
    • Unable to perform DTC judgment
    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
  12. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR ).

    HINT:

    • If a permanent DTC is output, the system is malfunctioning.
    • If no permanent DTC is output, the system is normal.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

  • Read freeze frame data using the Techstream. 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.
  • If DTC P0117 is stored, check that the engine does not overheat (the DTC P0117 may be stored due to engine overheating).

PROCEDURE

1.

READ VALUE USING TECHSTREAM (COOLANT TEMP)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Data List / Coolant Temp.

(e) Read the value displayed on the Techstream.

OK:

Same as actual engine coolant temperature.

Result

Result

Proceed to

Displayed temperature is -40°C (-40°F)

A

Displayed temperature is higher than 135°C (275°F)

B

Same as actual engine coolant temperature

C

HINT:

  • If there is an open circuit, the Techstream indicates -40°C (-40°F).
  • If there is a short circuit, the Techstream indicates higher than 135°C (275°F).
B

GO TO STEP 4

C

CHECK FOR INTERMITTENT PROBLEMS

A

2.

READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN WIRE HARNESS)

(a) Confirm good connection at the engine coolant temperature sensor connector.

Text in Illustration

*1

Engine Coolant Temperature Sensor

*2

ECM

*a

Front view of wire harness connector

(to Engine Coolant Temperature Sensor)

-

-

(b) Disconnect the engine coolant temperature sensor connector.

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

(d) Connect the Techstream to the DLC3.

(e) Turn the ignition switch to ON.

(f) Turn the Techstream on.

(g) Enter the following menus: Powertrain / Engine / Data List / Coolant Temp.

(h) Read the value displayed on the Techstream.

Standard value:

Higher than 135°C (275°F)

HINT:

Perform "Inspection After Repair" after replacing the engine coolant temperature sensor (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION ).

OK

REPLACE ENGINE COOLANT TEMPERATURE SENSOR

NG

3.

CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)

(a) Disconnect the B5 engine coolant temperature sensor connector.

(b) Disconnect the B1 ECM connector.

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

Standard Resistance (Check for Open):

Tester Connection

Condition

Specified Condition

B5-2 - B1-76 (THW)

Always

Below 1 Ω

B5-1 - B1-97 (ETHW)

Always

Below 1 Ω
OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.

READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN WIRE HARNESS)

(a) Disconnect the engine coolant temperature sensor connector.

Text in Illustration

*1

Engine Coolant Temperature Sensor

*2

ECM

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / Engine / Data List / Coolant Temp.

(f) Read the value displayed on the Techstream.

Standard value:

-40°C (-40°F)

HINT:

Perform "Inspection After Repair" after replacing the engine coolant temperature sensor (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION ).

OK

REPLACE ENGINE COOLANT TEMPERATURE SENSOR

NG

5.

CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)

(a) Disconnect the B5 engine coolant temperature sensor connector.

(b) Disconnect the B1 ECM connector.

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

Standard Resistance (Check for Short):

Tester Connection

Condition

Specified Condition

B5-2 or B1-76 (THW) - Body ground

Always

10 kΩ or higher
OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR