Toyota Yaris: Sfi System / Engine Coolant Temperature Sensor 1 Circuit Short to Battery or Open (P011515)

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Engine & Hybrid System / G16e-gts (engine Control) / Sfi System / Engine Coolant Temperature Sensor 1 Circuit Short to Battery or Open (P011515)

DESCRIPTION

Refer to DTC P011511.

Click here

HINT:

When DTC P011515 is stored, the ECM enters fail-safe mode. During fail-safe mode, the ECM sets the engine coolant temperature judgment value to 80°C (176°F) and the target engine coolant temperature to 82°C (180°F). Fail-safe mode continues until a pass condition is detected.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Note

P011515

Engine Coolant Temperature Sensor 1 Circuit Short to Battery or Open

The engine coolant temperature sensor output voltage is higher than 4.91 V for 0.5 seconds or more (1 trip detection logic).

  • Open or short in engine coolant temperature sensor circuit
  • Engine coolant temperature sensor
  • ECM

Comes on

SAE: P0118

HINT:

When a DTC is output, check the Data List item "Coolant Temperature" using the GTS.

Click here

DTC No.

Coolant Temperature

Malfunction

P011515

-40°C (-40°F)

  • Short to +B in THW circuit
  • Open in THW circuit
  • Open in ETHW circuit

If the Data List displays a normal value, the normal value may be due to a temporary recovery from the malfunction condition. Check for intermittent problems.

MONITOR DESCRIPTION

The engine coolant temperature sensor is used to monitor the outlet side 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 engine coolant temperature is low, the resistance in the thermistor increases. When the temperature is high, the resistance decreases. 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. If the engine coolant temperature sensor output voltage deviates from the normal operating range, the ECM interprets this as a malfunction in the engine coolant temperature sensor circuit, illuminates the MIL and stores a DTC.

Example:

If the engine coolant temperature sensor output voltage is higher than 4.91 V for 0.5 seconds or more, the ECM will illuminate the MIL and store this DTC.

MONITOR STRATEGY

Frequency of Operation

Continuous

CONFIRMATION DRIVING PATTERN

  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the GTS on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the ignition switch off and wait for at least 30 seconds.
  6. Turn the ignition switch to ON.
  7. Turn the GTS on.
  8. Wait 5 seconds or more.
  9. Enter the following menus: Powertrain / Engine / Trouble Codes.
  10. Read the pending DTCs.

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  12. Input the DTC: P011515.
  13. Check the DTC judgment result.

    GTS 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

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system is malfunctioning.

WIRING DIAGRAM

Refer to DTC P011511.

Click here

CAUTION / NOTICE / HINT

HINT:

Read Freeze Frame Data using the GTS. 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.

PROCEDURE

1.

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

(a) Disconnect the engine coolant temperature sensor connector.

*1

Engine Coolant Temperature Sensor

*2

ECM

(b) Connect terminals 1 (E2) and 2 (THW) of the engine coolant temperature sensor connector on the wire harness side.

(c) Enter the following menus.

Powertrain > Engine > Data List

Tester Display

Coolant Temperature

(d) According to the display on the GTS, read the Data List.

OK:

GTS Display

Specified Condition

Coolant Temperature

Higher than 135°C (275°F)

HINT:

Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.

Click here

OK

REPLACE ENGINE COOLANT TEMPERATURE SENSOR

NG

2.

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

(a) Disconnect the engine coolant temperature sensor connector.

(b) Disconnect the ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D35-2(THW) - D104-129(THW)

Always

Below 1 Ω

D35-1(E2) - D104-130(ETHW)

Always

Below 1 Ω

D35-2(THW) or D104-129(THW) - Other terminals

Always

10 kΩ or higher

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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    Categories

    Break-In Period

    No special break-in is necessary, but a few precautions in the first 600 miles (1,000 km) may add to the performance, economy, and life of the vehicle.

    Do not race the engine. Do not maintain one constant speed, either slow or fast, for a long period of time. Do not drive constantly at full-throttle or high engine rpm for extended periods of time. Avoid unnecessary hard stops. Avoid full-throttle starts.

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