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AUTOMATIC TRANSMISSION SYSTEM, Diagnostic DTC:P0985, P0986

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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)
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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. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0985 Shift Solenoid "E" Control Circuit Low (Shift Solenoid Valve SR)

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


  1. Driving so that gear changes occur

  2. A short in the shift solenoid valve SR circuit is detected.

  3. Malfunction status occurs 2 times (1 trip)

  4. 1-trip detection logic

  • Shift solenoid valve SR

  • Transmission wire

  • Harness and connector

  • TCM

 Comes on DTC stored
P0986 Shift Solenoid "E" Control Circuit High (Shift Solenoid Valve SR)

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


  1. Driving so that gear changes occur

  2. An open in the shift solenoid valve SR circuit is detected.

  3. Malfunction status occurs 2 times (1 trip)

  4. 1-trip detection logic

  • Shift solenoid valve SR

  • Transmission wire

  • Harness and connector

  • TCM

 Comes on DTC stored
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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.

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Table 1. *1 Shift Solenoid Valve SR *2 Transmission Wire
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

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

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Tip:

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.

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  2. Turn the engine switch off.

  3. Check for DTCs again.

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PROCEDURE


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    CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE (SHIFT SOLENOID VALVE SR) - TCM)


    1. B0067R2C38
      *a

      Rear view of wire harness connector

      (to TCM)

      Disconnect the F8 TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F8-15 (SR) - Body ground 20°C (68°F) 11 to 15 Ω
      Result
      Proceed to
      OK
      NG

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    REPLACE TCM


    1. Replace the TCM.

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      Result
      Proceed to
      NEXT

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    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
      F25-18 (SR) - F8-15 (SR) Always Below 1 Ω
      F25-18 (SR) or F8-15 (SR) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

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

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    INSPECT SHIFT SOLENOID VALVE SR


    1. B0065PXC01
      *a Shift Solenoid Valve SR

      Remove the shift solenoid valve SR.

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

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

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

      OK
      Valve moves and makes an operating sound.
      Result
      Proceed to
      OK
      NG