HYBRID CONTROL SYSTEM, Diagnostic DTC:P0990-897

DTC Code DTC Name
P0990-897 Transmission Fluid Pressure Sensor / Switch "E" Circuit High

DESCRIPTION

Refer to the description for DTC P0731-871 Click here.

DTC No. INF Code DTC Detection Condition Trouble Area
P0990 897

  • Oil pressure switch (PB3) does not turn off after the ST-on state occurs and a specified time passes. (2 trip detection logic)

  • If P0867 is detected, P0990-897 will also be detected (only when P0867 is detected because the power management control ECU cannot confirm that the line pressure is low if the low line pressure is requested). (2 trip detection logic)

  • Wire harness or connector

  • Hybrid vehicle transmission assembly

  • Power management control ECU

  • Oil pressure switch (PB3)

  • Transmission wire

Tech Tips

ST-on is a state that occurs when the READY indicator in the combination meter blinks after the power switch is pressed with the brake pedal depressed.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0731-871 Click here.

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK DTC OUTPUT (HYBRID CONTROL)


    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. Check if DTCs are output.

      Result
      Result Proceed to
      P0990-897 only is output. A
      Any of the following DTCs are also output. B
      DTC No. Relevant Diagnosis
      P0867-882 Transmission Fluid Pressure

    5. Turn the power switch off.


    B

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    A

  2. CHECK CONNECTOR CONNECTION CONDITION (POWER MANAGEMENT CONTROL ECU CONNECTOR)


    1. A01FQC6E01
      Text in Illustration
      *A for LHD
      *B for RHD

      Check the connector connections and contact pressure of the relevant terminals for the power management control ECU connectors Click here.

      OK
      The connectors are connected securely and there are no contact pressure problems.

    NG

    CONNECT SECURELY

    OK

  3. CHECK CONNECTOR CONNECTION CONDITION (TRANSMISSION WIRE CONNECTOR)


    1. A01FQ02

      Check the connection of the transmission wire connector Click here.

      OK
      The connector is connected securely and there are no contact problems.

    NG

    CONNECT SECURELY

    OK

  4. CHECK OIL PRESSURE SWITCH (PB3)


    1. Disconnect the connector from the power management control ECU.

    2. A01FQ69E25
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A36-4 (PB3) - Body ground Power switch off 10 kΩ or higher

    3. Connect the power management control ECU connector.


    NG

    Click here

    OK

  5. READ VALUE USING GTS (LINE PRESSURE)


    1. A01FS94E14
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Transmission Wire)

      Disconnect the transmission wire connector.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG).

      Note

      Turning the power switch on (IG) with the transmission wire connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    4. Enter the following menus: Powertrain / Hybrid Control / Data List / Line Pressure.

    5. Read the Data List.

      OK
      Tester Display Condition Specified Condition
      Line Pressure F52-8 (PB3) is connected to body ground ON
      F52-8 (PB3) is not connected to body ground OFF

    6. Turn the power switch off.

    7. Connect the transmission wire connector.


    NG

    Click here

    OK

  6. 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

  7. SIMULATION TEST


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Active Test / Activate the Oil Pump (500rpm), Activate the Oil Pump (1000rpm).

    4. Select OPM Revolution in the Data List.

    5. Perform the "Activate the Oil Pump (500rpm)" and "Activate the Oil Pump (1000rpm)" Active Tests.

      OK
      For both the "Activate the Oil Pump (500rpm)" and "Activate the Oil Pump (1000rpm)" Active Tests, the value of "OPM Revolution" is almost the same as the corresponding Active Test speed.

      Note

      Make sure that the auxiliary battery is not discharged.

    6. Turn the power switch off.


    NG

    Click here

    OK

  8. CHECK FOR INTERMITTENT PROBLEMS

    Click here


    NG

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

    OK

  9. CHECK FLUID LEAKS


    1. Check for fluid leaks from the hybrid vehicle transmission assembly.

      OK
      There are no fluid leaks.

    NG

    REPAIR OR REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Click here

    OK

  10. CHECK CONNECTOR CONNECTION CONDITION (OIL PRESSURE SWITCH (PB3))


    1. A01FT1O

      Remove the oil strainer assembly Click here.

    2. Check the connection of the oil pressure switch (PB3) connector Click here.

      OK
      The connector is connected securely and there are no contact problems.

    3. Install the oil strainer assembly.


    NG

    CONNECT SECURELY

    OK

  11. CHECK TRANSMISSION WIRE


    1. Remove the oil strainer assembly Click here.

    2. A01FUFHE02
      Text in Illustration
      *1 Transmission Wire
      *2 Oil Pressure Switch (PB3)

      Disconnect the transmission wire connector.

    3. Disconnect the connector from the oil pressure switch (PB3).

    4. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F52-8 (PB3) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the transmission wire connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    6. Turn the power switch off.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F52-8 (PB3) - Transmission wire oil pressure switch (PB3) side Power switch off Below 1 Ω
      F52-8 (PB3) or Transmission wire oil pressure switch (PB3) side - Body ground and other terminals Power switch off 10 kΩ or higher

    8. Connect the transmission wire connector.

    9. Connect the connector to the oil pressure switch (PB3).

    10. Install the oil strainer assembly.


    NG

    REPLACE TRANSMISSION WIRE Click here

    OK

    REPLACE OIL PRESSURE SWITCH (PB3) Click here

  12. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - TRANSMISSION WIRE)


    1. A01FRYNE04
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)
      *b

      Front view of wire harness connector

      (to Transmission Wire)

      Disconnect the power management control ECU connector.

    2. Disconnect the transmission wire connector.

    3. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A36-4 (PB3) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the power management control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    5. Turn the power switch off.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A36-4 (PB3) - F52-8 (PB3) Power switch off Below 1 Ω
      A36-4 (PB3) or F52-8 (PB3) - Body ground and other terminals Power switch off 10 kΩ or higher

    7. Connect the power management control ECU connector.

    8. Connect the transmission wire connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  13. CHECK CONNECTOR CONNECTION CONDITION (OIL PRESSURE SWITCH (PB3))


    1. A01FT1O

      Remove the oil strainer assembly Click here.

    2. Check the connection of the oil pressure switch (PB3) connector Click here.

      OK
      The connector is connected securely and there are no contact problems.

    3. Install the oil strainer assembly.


    NG

    CONNECT SECURELY

    OK

  14. CHECK TRANSMISSION WIRE


    1. Remove the oil strainer assembly Click here.

    2. A01FUFHE02
      Text in Illustration
      *a Transmission Wire
      *b Oil Pressure Switch (PB3)

      Disconnect the transmission wire connector.

    3. Disconnect the connector from the oil pressure switch (PB3).

    4. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F52-8 (PB3) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the transmission wire connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    6. Turn the power switch off.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F52-8 (PB3) - Transmission wire oil pressure switch (PB3) side Power switch off Below 1 Ω
      F52-8 (PB3) or Transmission wire oil pressure switch (PB3) side - Body ground and other terminals Power switch off 10 kΩ or higher

    8. Connect the transmission wire connector.

    9. Connect the connector to the oil pressure switch (PB3).

    10. Install the oil strainer assembly.


    NG

    REPLACE TRANSMISSION WIRE Click here

    OK

    REPLACE OIL PRESSURE SWITCH (PB3) Click here

  15. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - TRANSMISSION WIRE)


    1. A01FRYNE04
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)
      *b

      Front view of wire harness connector

      (to Transmission Wire)

      Disconnect the power management control ECU connector.

    2. Disconnect the transmission wire connector.

    3. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A36-4 (PB3) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the power management control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    5. Turn the power switch off.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A36-4 (PB3) - F52-8 (PB3) Power switch off Below 1 Ω
      A36-4 (PB3) or F52-8 (PB3) - Body ground and other terminals Power switch off 10 kΩ or higher

    7. Connect the power management control ECU connector.

    8. Connect the transmission wire connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here