СИСТЕМА АВТОМАТИЧЕСКОЙ ТРАНСМИССИИ С ЭЛЕКТРОННЫМ УПРАВЛЕНИЕМ, Diagnostic DTC:P0976, P0977

DTC Code DTC Name
P0976 Shift Solenoid "B" Control Circuit Low (Shift Solenoid Valve S2)
P0977 Shift Solenoid "B" Control Circuit High (Shift Solenoid Valve S2)

DESCRIPTION

Shifting from 1st to 4th (O/D) is performed in combination with "ON" and "OFF" operation of the shift solenoid valves S1, S2 and SL which are controlled by the ECM. If an open or short circuit occurs in either of the shift solenoid valves, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be operated smoothly Click here.

DTC No. DTC Detection Condition Trouble Area
P0976 ECM detects short in solenoid valve S2 circuit 2 times when solenoid valve S2 is operated (1-trip detection logic)

  • Short in shift solenoid valve S2 circuit

  • Shift solenoid valve S2

  • ECM
P0977 ECM detects open in solenoid valve S2 circuit 2 times when solenoid valve S2 is not operated (1-trip detection logic)

  • Open in shift solenoid valve S2 circuit

  • Shift solenoid valve S2

  • ECM

MONITOR DESCRIPTION

These DTCs indicate an open or short in the shift solenoid valve S2 circuit. When there is an open or short circuit in any shift solenoid valve circuit, the ECM detects the problem and illuminates the MIL and stores the DTC. When the shift solenoid valve S2 is on, if resistance is 8 Ω or less, the ECM determines there is a short in the shift solenoid valve S2 circuit.

When the shift solenoid valve S2 is off, if resistance is 100 kΩ or more, the ECM determines there is an open in the shift solenoid valve S2 circuit Click here.

WIRING DIAGRAM

A01BCD2E14

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT TRANSMISSION WIRE (S2)


    1. A01BB7WE02

      Disconnect the transmission wire connector from the transmission.

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

      Resistance
      Tester Connection

      Specified Condition

      20°C (68°F)
      8 - Body ground 11 to 15 Ω

    NG

    INSPECT SHIFT SOLENOID VALVE S2 Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)


    1. A01BF9KE16

      Connect the transmission connector to the transmission.

    2. Disconnect the connector from the ECM.

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

      Resistance
      Tester Connection

      Specified Condition

      20°C (68°F)
      D3-8 (S2) - Body ground 11 to 15 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM

  3. INSPECT SHIFT SOLENOID VALVE S2


    1. A01BEVTE01

      Remove the shift solenoid valve S2.

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

      Resistance
      Tester Connection

      Specified Condition

      20°C (68°F)
      Solenoid Connector (S2) - Solenoid Body (S2) 11 to 15 Ω

    3. Connect the positive (+) lead to the terminal of the solenoid connector, and the negative (-) lead to the solenoid body.

      OK
      The solenoid makes an operating sound.

    NG

    REPLACE SHIFT SOLENOID VALVE S2

    OK

    REPAIR OR REPLACE TRANSMISSION WIRE