HYBRID CONTROL SYSTEM, Diagnostic DTC:P3176-863

DTC Code DTC Name
P3176-863 Transmission Oil Pump Motor Coil Temperature Sensor Circuit Low

DESCRIPTION

The resistance of the temperature sensor (thermistor) installed in the oil pump motor changes in accordance with changes in the oil pump motor temperature. The lower the oil pump motor temperature, the higher the temperature sensor (thermistor) resistance. Conversely, the higher the temperature, the lower the resistance. The oil pump motor temperature sensor (thermistor) is connected to the power management control ECU. A power source voltage of 5 V is supplied to the oil pump motor temperature sensor (thermistor) through terminal TOPM of the power management control ECU. This means that resistor R in the ECU and the oil pump motor temperature sensor (thermistor) are connected in series. The voltage at terminal TOPM and the resistance value change in accordance with changes in the oil pump motor temperature.

DTC No. INF Code DTC Detection Condition Trouble Area
P3176 863 Short to GND in the oil pump motor temperature sensor circuit

  • Power management control ECU

  • Oil with motor pump assembly

  • Wire harness or connector

WIRING DIAGRAM

A000RF6E04

CAUTION / NOTICE / HINT

Tech Tips

The characteristics of the oil pump motor temperature sensor resistance (reference values) are as follows:

Tester Connection Resistance Temperature
OMT - OMTG 11.94 to 12.22 kΩ 68°F (20°C)
OMT - OMTG 5.75 to 5.92 kΩ 104°F (40°C)
OMT - OMTG 1.63 to 1.71 kΩ 176°F (80°C)

PROCEDURE


  1. CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

    4. Read and record the DTCs and freeze frame data.

    5. Clear DTCs and freeze frame data.

    6. Turn the power switch off.


    NEXT

  2. READ VALUE USING GTS (OPM TEMPERATURE)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Data List / OPM Temperature.

    4. Read the Data List.

      Result
      Tester Display Proceed to
      419°F (215°C) (short to GND) A
      Approximately equal to the actual temperature B

    5. Turn the power switch off.


    B

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

  3. CHECK HARNESS AND CONNECTOR


    1. A000ODHE02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the connector from the power management control ECU.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A36-31 (TOPM) or A36-32 (ETHO) - Body ground and other terminals Power switch off 10 kΩ or higher
      Standard Resistance
      Tester Connection Condition Specified Condition
      A36-31 (TOPM) - A36-32 (ETHO) 68°F (20°C) 11.94 to 12.22 kΩ
      A36-31 (TOPM) - A36-32 (ETHO) 104°F (40°C) 5.75 to 5.92 kΩ
      A36-31 (TOPM) - A36-32 (ETHO) 176°F (80°C) 1.63 to 1.71 kΩ

    3. Connect the power management control ECU connector.


    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    NG

  4. CHECK OIL WITH MOTOR PUMP ASSEMBLY (OIL PUMP MOTOR TEMPERATURE SENSOR)


    1. A000SW5

      Disconnect the oil pump motor temperature sensor connector.

    2. A000Q2PE01
      Text in Illustration
      *1 Oil Pump Motor Temperature Sensor

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F64-1 (OMT) - Body ground Power switch off 10 kΩ or higher

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F64-1 (OMT) - F64-2 (OMTG) 68°F (20°C) 11.94 to 12.22 kΩ
      F64-1 (OMT) - F64-2 (OMTG) 104°F (40°C) 5.75 to 5.92 kΩ
      F64-1 (OMT) - F64-2 (OMTG) 176°F (80°C) 1.63 to 1.71 kΩ

    4. Connect the oil pump motor temperature sensor connector.


    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE OIL WITH MOTOR PUMP ASSEMBLY Click here