AUTOMATIC TRANSMISSION SYSTEM, Diagnostic DTC:P0872

DTC Code DTC Name
P0872 Transmission Fluid Pressure Sensor / Switch "C" Circuit Low

DESCRIPTION

The oil pressure switch, which is built into the valve body, detects the fluid pressure of the SL1 fluid pressure circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0872 Transmission Fluid Pressure Sensor / Switch "C" Circuit Low

1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other


  1. Engine coolant temperature is 40°C (104°F) or more, ATF temperature is -10°C (14°F) or more, and the vehicle is driven with shift lever in D (no malfunctions are detected in shift solenoid valve SL1, 2, 3, 4 and 5, SR, transmission revolution sensors (NT, NC3, SP2), water temperature sensor, oil temperature sensor, knock control sensor, electronic throttle, or CAN2)

  2. When the actual gear is 1st to 5th gear, the oil pressure switch is OFF

  3. Malfunction status occurs 2 times (1 trip)

  4. 2-trip detection logic

  • Oil pressure switch

  • Transmission wire

  • Harness and connector

  • TCM

 Comes on DTC stored

WIRING DIAGRAM

B0065TDE05
*a Oil Pressure Switch
*b Transmission Wire

CAUTION / NOTICE / HINT

Note

Perform registration and/or initialization when parts related to the automatic transmission are replaced.

Click here

Tech Tips

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  1. Perform the D Position Shift Test in Road Test.

    Click here

  2. Turn the engine switch off.

  3. Perform step (1) again.

  4. Check for DTCs again.

    Click here

PROCEDURE


  1. READ VALUE USING GTS (TPS 1 SWITCH SIGNAL)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / ECT / Active Test / Control the Shift Position / Data List / TPS 1 Switch.


      Powertrain > ECT > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Control the Shift Position Operates the shift solenoid valves to allow gears to be selected manually.

      • Press "→" button: Upshift occurs

      • Press "←" button: Downshift occurs

      Possible to check operation of the shift solenoid valves.

      [Vehicle Condition]

      Vehicle speed: 50 km/h (31 mph) or less

      Powertrain > ECT > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      TPS 1 Switch Oil pressure switch status ON or OFF

      • ON: Gear is 1st to 5th

      • OFF: Gear is 6th to 8th; or shift lever is in P, N or R

      		 -

      Powertrain > ECT > Active Test
      Active Test Display
      Control the Shift Position
      Data List Display
      TPS 1 Switch
      Result
      Result Proceed to
      When the vehicle is being driven in a gear position between 1st and 5th, ON is displayed for TPS 1 Switch on the Data List. A
      When the vehicle is being driven in a gear position between 1st and 5th, OFF is displayed for TPS 1 Switch on the Data List. B

    B

    CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM) Click here

    A

  2. REPLACE TCM


    1. Replace the TCM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    PERFORM A/T CODE REGISTRATION Click here

  3. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM)


    1. Disconnect the F25 transmission wire connector.

    2. Disconnect the F8 TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F25-17 (TPS1) - F8-9 (TPS1) Always Below 1 Ω
      F25-17 (TPS1) or F8-9 (TPS1) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - TCM)

    OK

  4. INSPECT TRANSMISSION WIRE (OIL PRESSURE SWITCH)


    1. B0067UXC04
      *a

      Front view of wire harness connector

      (to Oil Pressure Switch Connector)
      *b

      Component without harness connected

      (Transmission Wire)
      *c Connector

      Disconnect the oil pressure switch connector.

      Click here

    2. Disconnect the F25 transmission wire connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Oil pressure switch connector - 17 (TPS1) Always Below 1 Ω
      Oil pressure switch connector or 17 (TPS1) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE OIL PRESSURE SWITCH Click here

    NG

    REPAIR OR REPLACE TRANSMISSION WIRE Click here