CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM, Diagnostic DTC:P0746, P0776

DTC Code DTC Name
P0746 Pressure Control Solenoid "A" Performance (Shift Solenoid Valve DS1)
P0776 Pressure Control Solenoid "B" Performance (Shift Solenoid Valve DS2)

DESCRIPTION

The ECM uses the shift control solenoids (DS1 and DS2) to control the in/out CVT fluid flow volumes at the primary pulley, to perform gear ratio change control.

DTC No.

DTC Detection Condition


  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

 Trouble Area
P0746

  1. Engine warmed up and starting/accelerating with shift lever in D

  2. The actual gear ratio is lower than the target

  3. 2 seconds

  4. 2 trip detection logic

 Continuously variable transaxle assembly

  1. Engine warmed up and stopping/deceleration with shift lever in D

  2. The actual gear ratio is higher than the target

  3. 1 second

  4. 2 trip detection logic
P0776

  1. Engine warmed up and starting/accelerating with shift lever in D

  2. The actual gear ratio is lower than the target

  3. 2 seconds

  4. 2 trip detection logic

  1. Engine warmed up and stopping/deceleration with shift lever in D

  2. The actual gear ratio is higher than the target

  3. 1 second

  4. 2 trip detection logic

MONITOR DESCRIPTION

The ECM compares the actual gear ratio with the target gear ratio. When the actual gear ratio and target gear ratio are different, the ECM detects the problem, illuminates the MIL and stores the DTC.

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0746 AND P0776)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn on the tester.

    4. Enter the following menus: Powertrain / Engine and ECT / DTC / Current or Pending.

    5. Read the DTCs using the tester.

      Result
      Result Proceed to
      Only P0746 or P0776 is output A
      P0746 and P0776 other DTCs are output B

      Tech Tips

      If any other DTCs besides P0746 or P0776 are output, perform troubleshooting for those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. REPLACE CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY


    1. Replace the continuously variable transaxle assembly Click here.


    NEXT

  3. PERFORM INITIALIZATION

    Note


    • Performing reset memory/initialization will clear the learned values of both the yaw rate and acceleration sensor (deceleration sensor 0 point calibration) and the CVT oil pressure (CVT oil pressure calibration). Make sure to perform reset memory, yaw rate and acceleration sensor 0 point calibration, and CVT oil pressure calibration when replacing any of the parts shown in the following table:

      Replaced Part

      • Continuously variable transaxle assembly

      • ECM

      • Oil pressure sensor

      • Yaw rate and acceleration sensor

    • After reset memory, always perform yaw rate and acceleration sensor (deceleration sensor 0 point) calibration first, and then the CVT oil pressure calibration.

    • Always perform the 0 point calibration with the vehicle on level ground.

    • Do not shake or vibrate the vehicle during the 0 point calibration.


    1. Using the intelligent tester, perform the reset memory, deceleration sensor 0 point calibration and CVT oil pressure calibration Click here.

    2. Check for DTCs again Click here.


    NEXT

    END