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    Coolant Temperature Range

    Uploaded by

    Daniel Mamani Paredez
    This document provides information about diagnostic trouble code P0116 for the engine coolant temperature sensor circuit on a 2004 Scion xB. It describes the sensor and circuit, the conditions required for the monitor to run, typical enabling conditions like engine temperature ranges, and inspection procedures. The monitor checks for a change in reported coolant temperature over 250 seconds of driving and will set the code if the temperature does not change by at least 3 degrees Celsius for temperatures between 35-60C or 1 degree Celsius for temperatures over 60C.

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    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    Coolant Temperature Range

    Uploaded by

    Daniel Mamani Paredez
    31 views2 pages
    This document provides information about diagnostic trouble code P0116 for the engine coolant temperature sensor circuit on a 2004 Scion xB. It describes the sensor and circuit, the conditions required for the monitor to run, typical enabling conditions like engine temperature ranges, and inspection procedures. The monitor checks for a change in reported coolant temperature over 250 seconds of driving and will set the code if the temperature does not change by at least 3 degrees Celsius for temperatures between 35-60C or 1 degree Celsius for temperatures over 60C.

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    coolant temperature range

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    This document provides information about diagnostic trouble code P0116 for the engine coolant temperature sensor circuit on a 2004 Scion xB. It describes the sensor and circuit, the conditions required for the monitor to run, typical enabling conditions like engine temperature ranges, and inspection procedures. The monitor checks for a change in reported coolant temperature over 250 seconds of driving and will set the code if the temperature does not change by at least 3 degrees Celsius for temperatures between 35-60C or 1 degree Celsius for temperatures over 60C.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    31 views2 pages

    Coolant Temperature Range

    Uploaded by

    Daniel Mamani Paredez
    This document provides information about diagnostic trouble code P0116 for the engine coolant temperature sensor circuit on a 2004 Scion xB. It describes the sensor and circuit, the conditions required for the monitor to run, typical enabling conditions like engine temperature ranges, and inspection procedures. The monitor checks for a change in reported coolant temperature over 250 seconds of driving and will set the code if the temperature does not change by at least 3 degrees Celsius for temperatures between 35-60C or 1 degree Celsius for temperatures over 60C.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 2

    05–82

    DIAGNOSTICS – SFI SYSTEM 052NC–12

    DTC P0116 ENGINE COOLANT TEMP. CIRCUIT


    RANGE/PERFORMANCE PROBLEM

    CIRCUIT DESCRIPTION
    Refer to DTC P0115 on page 05–77.
    DTC No. DTC Detection Condition Trouble Area
    If the engine coolant temperature (ECT) was between 35C
    (95F) and 60C (140F) when starting the engine, and also
    conditions (a) and (b) are met:
    (a) Vehicle has run with acceleration and deceleration for more
    than 250 second
    (b) ECT still remains within 3C (37.4F) of the initial tempera-
    ture
    rt(2 trip detection logic)
    P0116  Engine coolant temperature sensor
    If the engine coolant temperature (ECT) was more than 60C
    (140F) when starting the engine, and also conditions (a) and
    (b) are met:
    (a) Vehicle has run with acceleration and deceleration for more
    than 250 second
    (b) ECT still remains within 1C (33.8F) of the initial tempera-
    ture
    (6 trip detection logic)

    MONITOR DESCRIPTION
    The engine coolant temperature (ECT) sensor is used to monitor the engine coolant temperature. The ECT
    sensor has a thermistor that varies its resistance depending on the temperature of the engine coolant. When
    the coolant temperature is low, the resistance in the thermistor increases. When the temperature is high, the
    resistance drops. The variations in resistance are reflected in the voltage output from the sensor. The ECM
    monitors the sensor voltage and uses this value to calculate the engine coolant temperature. When the sen-
    sor output voltage deviates from the normal operating range, the ECM interprets this as a fault in the ECT
    sensor and sets a DTC.
    Examples:
    1) Upon starting the engine, the coolant temperature (ECT) was between 35C (95F) and 60C (140F).
    If after driving for 250 seconds, the ECT still remains within 3C (5.4F) of the staring temperature, a DTC
    will be set. (2 trip detection logic)
    2) Upon starting the engine, the coolant temperature (ECT) was over 60C (140F). If after driving for 250
    seconds, the ECT still remains within 1C (1.8F) of the starting temperature, a DTC will be set. (6 trip detec-
    tion logic)
    MONITOR STRATEGY
    Related DTCs P0116 Engine coolant temperature sensor range check (stuck)
    Main sensors Engine coolant temperature sensor
    Required sensors/components Intake air temperature sensor, crankshaft position sensor,
    Related sensors
    mass air flow sensor
    Frequency of operation Continuous
    Duration 250 sec
    2 driving cycles (when temperature is fixed between 35C (95F) and 60C (140F))
    MIL operation
    6 driving cycles (when temperature is fixed at 60C (140F) or more)
    Sequence of operation None

    2004 SCION xB REPAIR MANUAL (RM1031U)

    Author: Date: 242


    05–83
    DIAGNOSTICS – SFI SYSTEM

    TYPICAL ENABLING CONDITIONS


    Specification
    Item
    Minimum Maximum
    The monitor will run whenever the follow-
    See ”List of Disable a Monitor” table (On page 05–24)
    ing DTCs are not present
    Case 1 (when temperature is fixed between 35C (95F) and 60C (140F)):
    Cumulative idle off period 250 sec –
    Speed increase by  30 km/h (19 mph) 10 times –
    Engine coolant temperature 35C (95F) 60C (140F)
    Intake air temperature –6.7C (20F) –
    Case 2 (When temperature is fixed at 60C (140F) or more):
    Engine coolant temperature 60C (140F) 104.4C (220F)
    Intake air temperature –6.7C (20F) –
    Stop and go Stop for 20 sec or more and accelerate to more than 44 mph (70 km/h)
    70 km/h (44 mph) in less than 40 sec Decelerate from 40 mph (65 km/h) to 2 mph (3 km/h) within 35 sec and stop for 10sec

    TYPICAL MALFUNCTION THRESHOLDS


    Detection Criteria Threshold
    Case1 (When temperature is fixed between 35C (95F) and 60C (140F)):
    Change of engine coolant temperature value Less than 3C (5.4F)
    Case2 (When temperature is fixed at 60C (140F) or more):
    Change of engine coolant temperature value 1C (1.8F) or less

    COMPONENT OPERATING RANGE


    Standard Value
    Engine coolant temperature changes with the actual engine coolant temperature

    WIRING DIAGRAM
    Refer to DTC P0115 on page 05–77.
    INSPECTION PROCEDURE
    HINT:
     If DTCs ”P0115, P0116, P0117, P0118 and P0125” are output simultaneously, engine coolant temper-
    ature sensor circuit may be open or short. Perform the troubleshooting of DTC ”P0115, P0117 or
    P0118” first.
     Read freeze frame data using the hand−held tester or the OBD II scan tool. Freeze frame data records
    the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determin-
    ing whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio
    was lean or rich, etc. at the time of the malfunction.
    1 REPLACE ENGINE COOLANT TEMPERATURE SENSOR

    2004 SCION xB REPAIR MANUAL (RM1031U)

    Author: Date: 243

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