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 circuit 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 some manual operation will be possible. If an open or short has occurred, the TCM cuts power to the malfunctioning solenoid valve.

DTC No. DTC Detection Condition Trouble Area
P0985 The 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 or connector

  • TCM
P0986 The 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 or 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 a 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

A01FESOE01

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (SHIFT SOLENOID VALVE SR - TCM)


    1. A01FF0QE03
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to TCM)

      Disconnect the TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F72-15 (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 A/T CODE REGISTRATION Click here

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


    1. Disconnect the F73 transmission wire connector.

    2. Disconnect the F72 TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F73-18 (SR) - F72-15 (SR) Always Below 1 Ω
      F73-18 (SR) or F72-15 (SR) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT SHIFT SOLENOID VALVE SR


    1. A01FGS8E01
      Text in Illustration
      *1 Shift Solenoid Valve SR

      Remove the shift solenoid valve SR Click here.

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

      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 a positive (+) battery lead to the terminal of the solenoid valve connector, and a negative (-) battery lead to the solenoid body. Then check that the valve moves and makes an operating sound.

      OK
      Valve moves and makes an operating sound.

    NG

    REPLACE SHIFT SOLENOID VALVE SR Click here

    OK

    REPAIR OR REPLACE TRANSMISSION WIRE Click here