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 hybrid vehicle control ECU. Power source voltage of 5 V is supplied to the oil pump motor temperature sensor (thermistor) through terminal TOPM of the hybrid vehicle 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

  • Hybrid vehicle control ECU

  • Oil with motor pump assembly

  • Wire harness or connector

WIRING DIAGRAM

A000VBCE07

CAUTION / NOTICE / HINT

Tech Tips

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

Tester Connection Resistance Temperature
TOPM - E2 121 to 129.7 kΩ 20°C (68° F)
TOPM - E2 50.49 to 55.01 kΩ 40°C (104° F)
TOPM - E2 11.26 to 12.99 kΩ 80°C (176° F)

PROCEDURE


  1. CLEAR DTC


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

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

    5. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

    6. Clear DTCs and freeze frame data.


    NEXT

  2. READ VALUE USING INTELLIGENT TESTER (OPM TEMPERATURE)


    1. Select the following menu items: Select: Powertrain / Hybrid Control / Data List / OPM Temperature.

    2. Read the data list.

      Result
      Tester Display Proceed to
      200°C (392° F) (short to GND) A
      Approximately equal to the actual temperature B

    B

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    A

  3. CHECK HARNESS AND CONNECTOR


    1. A000ZYFE03
      *1 Rear view of wire harness connector: (to Hybrid Vehicle Control ECU)
      *2 TOPM

      Turn the power switch off.

    2. Disconnect connectors A76 and E58 from the hybrid vehicle control ECU.

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

      Standard resistance (Check for short)
      Tester Connection Switch Condition Specified Condition
      E58-34 (TOPM) or A76-5 (E2) - Body ground and other terminals Power switch off 10 kΩ or higher
      Standard resistance
      Tester Connection Condition Specified Condition
      E58-34 (TOPM) - A76-5 (E2) 20°C (68°F) 121 to 129.7 kΩ
      E58-34 (TOPM) - A76-5 (E2) 40°C (104° F) 50.49 to 55.01 kΩ
      E58-34 (TOPM) - A76-5 (E2) 80°C (176° F) 11.26 to 12.99 kΩ

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

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


    1. A000ZNK

      Turn the power switch off.

    2. Disconnect the oil pump motor temperature sensor connector.

    3. A000YN1E01
      *1 Oil Pump Motor Temperature Sensor
      *2 OMT
      *3 OMTG

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

      Standard resistance (Check for short)
      Tester Connection Switch Condition Specified Condition
      E67-1 (OMT) - Body ground Power switch off 10 kΩ or higher

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

      Standard resistance
      Tester Connection Condition Specified Condition
      E67-1 (OMT) - E67-2 (OMTG) 20°C (68° F) 121 to 129.7 kΩ
      E67-1 (OMT) - E67-2 (OMTG) 40°C (104° F) 50.49 to 55.01 kΩ
      E67-1 (OMT) - E67-2 (OMTG) 80°C (176° F) 11.26 to 12.99 kΩ

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE OIL WITH MOTOR PUMP ASSEMBLY Click here