AUTOMATIC TRANSMISSION SYSTEM, Diagnostic DTC:P0985, P0986

DTC Code DTC Name
P0985 Shift Solenoid "E" Control Circuit Low (Shift Solenoid Valve SR)
P0986 Shift Solenoid "E" Control Circuit High (Shift Solenoid Valve SR)

DESCRIPTION

Based on the ON-OFF combinations of the SL1, 2, 3, 4 and 5, SLT, SLU, SL and SR solenoids, the TCM performs gear shifts from 1st gear to 8th gear. If a line related to a solenoid valve is open or shorted, the TCM uses the fail-safe function to turn other solenoid valves ON or OFF. If all solenoid valves are malfunctioning, only the mechanical fluid pressure circuit will function and the system will change to manual transmission. If an open or short has occurred, the TCM cuts power to the malfunctioning solenoid valve.

DTC No. DTC Detection Condition Trouble Area
P0985 TCM detects short in solenoid valve SR circuit 2 times when solenoid valve SR is operated (1 trip detection logic)

  • Shift solenoid valve SR

  • Transmission wire

  • Harness and connector

  • TCM
P0986 TCM detects open in solenoid valve SR circuit 2 times when solenoid valve SR is operated (1 trip detection logic)

  • Shift solenoid valve SR

  • Transmission wire

  • Harness and connector

  • TCM

MONITOR DESCRIPTION

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

When the shift solenoid valve SR is OFF, if resistance is 100 kΩ or more, the TCM determines there is an open in the shift solenoid valve SR circuit Click here.

WIRING DIAGRAM

A001FZ2E16
*1 Shift Solenoid Valve SR
*2 Transmission Wire

PROCEDURE


  1. CHECK HARNESS AND TRANSMISSION WIRE (TRANSMISSION WIRE - TCM, TRANSMISSION WIRE (SHIFT SOLENOID VALVE SR))


    1. A001C0JE01
      *1 TCM Connector

      Disconnect the E7 TCM connector.

    2. Measure the resistance of the wire harness side connector.

      Standard resistance
      Tester Connection Condition Specified Condition
      E7-17 (SR) - Body ground Always 11 to 15 Ω

    NG

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

    OK

  2. REPLACE TCM


    1. Replace the TCM Click here.


    NEXT

    PERFORM AT REGISTRATION Click here

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


    1. Disconnect the E50 transmission wire connector.

      A001CF3E11
      *1 Front view of wire harness connector: (to Transmission Wire)
      *2 TCM Connector

    2. Disconnect the E7 TCM connector.

    3. Measure the resistance of the wire harness side connectors.

      Standard resistance
      Tester Connection Condition Specified Condition
      E50-18 (SR) - E7-17 (SR) Always Below 1 Ω
      E50-18 (SR) or E7-17 (SR) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT SHIFT SOLENOID VALVE SR


    1. A001F3VE01
      *1 Shift Solenoid Valve SR

      Remove the shift solenoid valve SR Click here.

    2. Measure the resistance of the shift solenoid valve.

      Standard resistance
      Tester Connection Condition Specified Condition
      Shift solenoid valve SR connector - Shift solenoid valve SR body 20°C (68°F) 11 to 15 Ω

    3. Connect the battery's positive (+) lead to the terminal of the solenoid valve connector, and the negative (-) lead to the solenoid body. Then check that the valve moves and makes an operating noise.

      OK
      Valve moves and makes operating noise.

    OK

    REPAIR OR REPLACE TRANSMISSION WIRE Click here

    NG

    REPLACE SHIFT SOLENOID VALVE SR Click here