DTC Troubleshooting: P281D
DTC P281D: Shift Solenoid Valve O/P (Pressure Control Solenoid "H") Control Circuit Low
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.

DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P281D Shift Solenoid Valve O/P (Pressure Control Solenoid "H") Control Circuit Low
      

1.
Problem verification:

Problem verification
?1.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Select the Shift Solenoid Valve O/P Test in the Miscellaneous Test Menu, and check that the shift solenoid valve O/P operates with the HDS.

  

?4.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P281D Shift Solenoid Valve O/P (Pressure Control Solenoid "H") Control Circuit Low
      

Is DTC P281D indicated?

     
YES
     
     
     
The failure is duplicated. Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals between the shift solenoid valve O/P and the PCM.?
2.
Shift solenoid valve O/P check:

Shift solenoid valve O/P check
?1.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.
Jump the SCS line with the HDS.


?3.
Disconnect the following connector.

?4.
Measure the resistance between test points 1 and 2.
Test condition
Ignition switch LOCK (0), or OFF mode
 
PCM connector C (51P): disconnected
Test circuit
SOL C
Test point 1
PCM connector C (51P) No. 17 (BLU/BLK)
Test point 2
Body ground


Is there 10.6?13.5 ??

     
YES
     
     
     
     
NO
     
     
     
Go to step 3.
3.
Shorted wire check (SOL C line):

Shorted wire check (SOL C line)
?1.
Disconnect the following connector.
Solenoid wire harness A 8P connector

?2.
Check for continuity between test points 1 and 2.
Test condition
Ignition switch LOCK (0), or OFF mode
 
Solenoid wire harness A 8P connector: disconnected
 
PCM connector C (51P): disconnected
Test circuit
SOL C
Test point 1
PCM connector C (51P) No. 17 (BLU/BLK)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short to body ground in the SOL C wire between the solenoid wire harness A 8P connector and the PCM, then do the repair verification.
     
NO
     
     
     
Go to step 4.
4.
Shift solenoid valve O/P internal resistance check:

Shift solenoid valve O/P internal resistance check
?1.
Disconnect the following connector.

?2.
Measure the resistance between test points 1 and 2.
Test condition
Ignition switch LOCK (0), or OFF mode
 
Shift solenoid valve O/P 2P connector: disconnected
Test circuit
SHC+
Test point 1
Shift solenoid valve O/P 2P connector No. 1
Test point 2
Body ground


Is there 10.6?13.5 ??

     
YES
     
     
     
Go to step 5.
     
NO
     
     
     
5.
Shorted wire check (SHC+ line):

Shorted wire check (SHC+ line)
?1.
Check for continuity between test points 1 and 2.
Test condition
Ignition switch LOCK (0), or OFF mode
 
Solenoid wire harness A 8P connector: disconnected
 
Shift solenoid valve O/P 2P connector: disconnected
Test circuit
SHC+
Test point 1
Shift solenoid valve O/P 2P connector No. 1 (YEL)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short to body ground in the SHC+ wire between the solenoid wire harness A 8P connector and the shift solenoid valve O/P, then do the repair verification.
     
NO
     
     
     
Check for poor connections or loose terminals between the shift solenoid valve O/P and the PCM, then go to step 1 and recheck.
Repair verification (OBD STATUS check):

?1.
Reconnect all connectors.

?2.
Exit the SCS mode with the HDS.


?3.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?4.
Clear the DTC with the HDS.


?5.
Start the engine in P, and wait for at least 30 seconds while pressing the brake pedal.

?6.
Monitor the OBD STATUS for P281D in the DTCs MENU with the HDS.
DTC Description
OBD Status
P281D Shift Solenoid Valve O/P (Pressure Control Solenoid "H") Control Circuit Low
  


Does the HDS indicate PASSED, FAILED, or NOT COMPLETED?

     
PASSED
     
     
     
Troubleshooting is complete. If the PCM was substituted, replace the original PCM. Check for other DTC after this troubleshooting. If any other Pending or Confirmed DTCs were indicated, go to the indicated DTC's troubleshooting.?
     
FAILED
     
     
     
Troubleshooting is incomplete. Check for poor connections or loose terminals between the shift solenoid valve O/P and the PCM, then go to step 1 and recheck. If the PCM was updated, substitute a known-good PCM, and check the OBD STATUS again.
     
NOT COMPLETED
     
     
     
Repair verification is incomplete. Meet the test condition, and check the OBD STATUS again.