DTC P2728 (Flash Code 35) Pressure Control Solenoid E (SLT) Control Circuit Performance (AWR6B45)

1. DTC P2728 description

Line pressure control solenoid (SLT) is installed on the valve body assembly and adjusts the line pressure required for clutch and brake. The TCM controls line pressure control solenoid (SLT) based on the information of the engine torque, etc. When the line pressure control solenoid is activated, the TCM accumulates the difference between the required solenoid current and the actual solenoid current as a feedback error current. If the TCM detects an abnormal line pressure control solenoid (SLT) feedback error current, the DTC is set.

2. Condition for setting DTC P2728

Condition for running the DTC

  • The ignition switch is ON.
  • The battery voltage is 9.0 to 16.0 V.
  • DTCs P2729 and P2730 are not set.

Refer to "55.Transmission Control 5A.Troubleshooting(AWR6B45) DTC P2729 (Flash Code 35) Pressure Control Solenoid E (SLT) Control Circuit Low".

Refer to "55.Transmission Control 5A.Troubleshooting(AWR6B45) DTC P2730 (Flash Code 35) Pressure Control Solenoid E (SLT) Control Circuit High".

Condition for setting the DTC

  • The TCM detects an abnormal line pressure control solenoid (SLT) feedback error current.

3. Action taken when DTC P2728 sets

  • The TCM flashes the check trans warning light. Refer to Action taken when DTC sets - Type A.

Refer to "55.Transmission Control 5A.Troubleshooting(AWR6B45) DTC type definitions".

  • The TCM inhibits the shift timing control.
  • The TCM inhibits the lock-up timing control.
  • The TCM inhibits the slip lock-up control.
  • The TCM inhibits the garage control.
  • The TCM inhibits the self-learning control.
  • The TCM inhibits the engine torque control.
  • The TCM inhibits the skip gear shift control.
  • If the DTC is set in the reverse gear, the gear is restricted to neutral or reverse.
  • If the DTC is set in the D range, the gear is restricted to 5th or reverse.

4. Condition for clearing DTC P2728

  • Refer to Condition for clearing the MIL, check trans warning light/DTC - Type A or Type B.

Refer to "55.Transmission Control 5A.Troubleshooting(AWR6B45) DTC type definitions".

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