DTC Troubleshooting: P2721
DTC P2721: A/T Clutch Pressure Control Solenoid Valve D High Input
NOTE:
Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review the General Troubleshooting Information.
This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
If DTC P2721 is stored in the PCM, the transmission does not shift to 2nd or 5th gear because of the fail-safe function.

DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P2721 A/T Clutch Pressure Control Solenoid Valve D High Input
      

1.
Problem verification:

Problem verification
?1.
Press the engine start/stop button to select the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P2721 A/T Clutch Pressure Control Solenoid Valve D High Input
      

Is DTC P2721 indicated?

     
YES
     
     
     
The failure is duplicated. Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for poor connections and loose terminals between A/T clutch pressure control solenoid valve D and the PCM.?
2.
A/T clutch pressure control solenoid valve D check:

A/T clutch pressure control solenoid valve D check
?1.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
A/T C.P.C. Sol VLV. D Actual
More than 0.035
A
    

Do the current condition(s) match the threshold?

     
YES
     
     
     
A/T clutch pressure control solenoid valve D is OK. Go to step 3.
     
NO
     
     
     
Faulty A/T clutch pressure control solenoid valve D. Replace the secondary valve body (A/T clutch pressure control solenoid valve D).?
3.
Open wire check (GND1 line, GND2 line):

Open wire check (GND1 line, GND2 line)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Jump the SCS line with the HDS.


?3.
Disconnect the following connectors.

?4.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
 
PCM connector B (51P): disconnected
Test circuit
GND1
Test point 1
PCM connector B (51P) No. 11 (BLK)
Test point 2
Body ground
   
Test circuit
GND2
Test point 1
PCM connector B (51P) No. 20 (BRN)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
The GND1 and GND2 wires are OK. Replace the PCM.?
     
NO
     
     
     
Repair an open in the GND1 and/or GND2 wire(s) between the PCM and body ground (G101) or repair poor body ground (G101).?