AUTOMATIC TRANSMISSION SYSTEM, Diagnostic DTC:P0961, P0962, P0963

DTC Code DTC Name
P0961 Pressure Control Solenoid "A" Performance (SL1 Solenoid)
P0962 Pressure Control Solenoid "A" Circuit Low (SL1 Solenoid)
P0963 Pressure Control Solenoid "A" Circuit High (SL1 Solenoid)

DESCRIPTION

Based upon a signal from the TCM, the combination of shift solenoid valve (S1, S2, S3, S4, SR, SL1, SL2) changes the gear position from 1st to 6th. As a fail-safe function if the solenoid valve system is open or shorted, the TCM cuts power to all solenoids, leaving just the mechanical hydraulic circuit, requiring manual shifting.

DTC No.

DTC Detection Condition


  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

 Trouble Area
P0961

  1. Not learning control prohibited status

    Not open or short in the shift solenoid valve SL1 circuit

  2. The difference between the shift solenoid valve SL1 operational feedback current is 12 A or more in total.

  3. Detects "2.Malfunction Status" 2 times consecutively.

  4. 1-trip detection logic

  • Shift solenoid valve SL1

  • Transmission wire

  • Harness and connector

  • TCM
P0962

  1. Not learning control prohibited status

    1 second or more has elapsed after turning shift solenoid valve SL1 off.

  2. The shift solenoid valve SL1 operational feedback voltage is 0.018 V or less.

  3. Detects malfunction that continues for 100 ms or more 5 times consecutively.

  4. 1-trip detection logic

  • Shift solenoid valve SL1

  • Transmission wire

  • Harness and connector

  • TCM
P0963

  1. Not learning control prohibited status

    1 second or more has elapsed after turning shift solenoid valve SL1 on.

  2. The shift solenoid valve SL1 operational feedback voltage is 0.257 V or more.

  3. Detects malfunction that continues for 100 ms or more 5 times consecutively.

  4. 1-trip detection logic

  • Shift solenoid valve SL1

  • Transmission wire

  • Harness and connector

  • TCM

Reference (Using an oscilloscope):

Check the waveform between the terminals SL1+ and SL1- of the TCM connector

A004KEME24
*a 5 V/DIV.
*b 1 ms./DIV.
Standard
Refer to the illustration.
Terminal SL1+ - SL1-
Tool setting 5 V/DIV., 1 ms./DIV.
Vehicle condition 5th or 6th gear

MONITOR DESCRIPTION

This DTC indicates an open, short, or feedback stuck in the shift solenoid valve SL1 circuit. The TCM commands gearshift by turning the shift solenoid valves "ON/OFF". When there is an open or short circuit in any shift solenoid valve circuit, the TCM detects the problem and illuminates the MIL and stores the DTC.

WIRING DIAGRAM

A004KRXE18
*1 Shift Solenoid Valve SL1
*2 Transmission Wire

CAUTION / NOTICE / HINT

Note

Perform the universal trip to clear permanent DTCs Click here.

Tech Tips


  • The shift solenoid valve SL1 is turned on/off normally when the shift lever is in the D position:

    TCM command gearshift 1st 2nd 3rd 4th 5th 6th
    Shift solenoid valve SL1 OFF OFF OFF OFF ON ON

PROCEDURE


  1. INSPECT TRANSMISSION WIRE (SL1)


    1. Disconnect the L4 transmission wire connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      L4-13(SL1+) - L4-6(SL1-) 20°C(68°F) 5.0 to 5.6 Ω
      L4-13(SL1+) - Body ground Always 10 kΩ or higher
      L4-6(SL1-) - Body ground Always 10 kΩ or higher

    3. Connect the L4 transmission wire connector.


    NG

    INSPECT SHIFT SOLENOID VALVE SL1 Click here

    OK

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


    1. Disconnect the A18 TCM connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      A18-16(SL1+) - A18-12(SL1-) 20°C(68°F) 5.0 to 5.6 Ω
      A18-16(SL1+) - Body ground Always 10 kΩ or higher
      A18-12(SL1-) - Body ground Always 10 kΩ or higher

    3. Connect the A18 TCM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE TCM


    1. Replace the TCM Click here.


    NEXT

    PERFORM THE RESET MEMORY Click here

  4. INSPECT SHIFT SOLENOID VALVE SL1


    1. Remove the shift solenoid valve SL1 Click here.

    2. Perform inspection of the shift solenoid valve SL1 Click here.


    OK

    REPAIR OR REPLACE TRANSMISSION WIRE Click here

    NG

    REPLACE SHIFT SOLENOID VALVE SL1 Click here