Dtc P0115 Engine Coolant Temperature Circuit

Двигатель. Toyota Rav4. Aca30, 33, 38 Ala30
Система Управления Двигателем 2Ad-Fhv. Toyota Rav4. Aca30, 33, 38 Ala30

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (ENGINE COOLANT TEMPERATURE)

READ VALUE USING INTELLIGENT TESTER (CHECK FOR OPEN IN WIRE HARNESS)

CHECK WIRE HARNESS (ENGINE COOLANT TEMPERATURE SENSOR - ECM)

READ VALUE USING INTELLIGENT TESTER (CHECK FOR SHORT IN WIRE HARNESS)

CHECK WIRE HARNESS (ENGINE COOLANT TEMPERATURE SENSOR - ECM)

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 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 is the same as the intake air temperature sensor.
УКАЗАНИЕ:
If the ECM detects the DTC P0115, P0117, or P0118, it operates the fail-safe function in which the ECT is assumed to be 80°C (176°F).

DTC No.
DTC Detection Condition
Trouble Area
P0115
Open or short in ECT sensor circuit for 0.5 seconds
(1 trip detection logic)
  1. Open or short in ECT sensor circuit
  2. ECT sensor
  3. ECM
P0117
Short in ECT sensor circuit for 0.5 seconds
(sensor resistance value less than 79 Ω)
(1 trip detection logic)
  1. Open or short in ECT sensor circuit
  2. ECT sensor
  3. ECM
P0118
Open in ECT sensor circuit for 0.5 seconds
(sensor resistance value more than 156 kΩ)
(1 trip detection logic)
  1. Open or short in ECT sensor circuit
  2. ECT sensor
  3. ECM

УКАЗАНИЕ:
When DTC P0115, P0117, and/or P0118 is detected, check the engine coolant temperature by entering the following menus on the intelligent tester: Powertrain / Engine and ECT / Data List / Coolant Temp.

Reference:
Temperature Displayed
Malfunction
-40°C (-40°F)
Open circuit
140°C (284°F) or more
Short circuit

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0115 Engine Coolant Temperature Circuit


INSPECTION PROCEDURE

ПРИМЕЧАНИЕ:
After replacing the ECM, the new ECM needs registration (see page RAV4_ACA30 RM000000TJ4007X.html) and initialization (see page RAV4_ACA30 RM000000TIN007X.html).
УКАЗАНИЕ:
If DTCs relating to different systems are output, and they share terminal E2 as their ground, check this ground circuit first.
1.READ VALUE USING INTELLIGENT TESTER (ENGINE COOLANT TEMPERATURE)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG) and turn the tester ON.

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

  1. Read the value.

    Standard value:
    Between 75 and 95°C (167 and 203°F) with warm engine.
    Result:
    Temperature Displayed
    		Proceed to
    -40°C (-40°F)
    		A
    140°C (284°F) or more
    		B
    Between 75 and 95°C (167 and 203°F)
    		C
    УКАЗАНИЕ:
    1. If there is an open circuit, the tester indicates -40°C (-40°F).
    2. If there is a short circuit, the tester indicates 140°C (284°F) or more.


B
Перейдите к шагу 4

C
CHECK FOR INTERMITTENT PROBLEMS
A


2.READ VALUE USING INTELLIGENT TESTER (CHECK FOR OPEN IN WIRE HARNESS)


    Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0115 Engine Coolant Temperature Circuit

  1. Disconnect the B4 ECT sensor connector.

  1. Connect terminals 1 and 2 of the ECT sensor wire harness side connector.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG) and turn the tester ON.

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

  1. Read the value.

    Standard value:
    140°C (284°F) or higher.

  1. Reconnect the ECT sensor connector.



OK
CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE ENGINE COOLANT TEMPERATURE SENSOR
NG


3.CHECK WIRE HARNESS (ENGINE COOLANT TEMPERATURE SENSOR - ECM)


    Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0115 Engine Coolant Temperature Circuit

  1. Disconnect the B4 ECT sensor connector.

  1. Disconnect the B32 ECM connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    B4-2 - B32-111 (THW)
    		Below 1 Ω
    B4-1 - B32-88 (ETHW)
    		Below 1 Ω

  1. Reconnect the ECT sensor connector.

  1. Reconnect the ECM connector.



OK
REPAIR OR REPLACE HARNESS AND CONNECTOR
NG

CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM

4.READ VALUE USING INTELLIGENT TESTER (CHECK FOR SHORT IN WIRE HARNESS)


    Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0115 Engine Coolant Temperature Circuit

  1. Disconnect the B4 ECT sensor connector.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG) and turn the tester ON.

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

  1. Read the value.

    Standard value:
    -40°C (-40°F) or more.

  1. Reconnect the ECT sensor connector.



OK
REPLACE ENGINE COOLANT TEMPERATURE SENSOR
NG


5.CHECK WIRE HARNESS (ENGINE COOLANT TEMPERATURE SENSOR - ECM)


    Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0115 Engine Coolant Temperature Circuit

  1. Disconnect the B4 ECT sensor connector.

  1. Disconnect the B32 ECM connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    B4-2 or B32-111 (THW) - Body ground
    		10 kΩ or higher

  1. Reconnect the ECT sensor connector.

  1. Reconnect the ECM connector.



OK
REPAIR OR REPLACE HARNESS AND CONNECTOR
NG

REPLACE ECM