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

NOTE: 

• Before you troubleshoot, review the General Troubleshooting Information - Refer to: How to Troubleshoot the Fuel and Emissions SystemsHow to Troubleshoot the CVT System(CVT System) .
• This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.

DTC (CVT)

• 1. Problem verification:

  - 1. Turn the vehicle to 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. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.

• 2. Shift solenoid valve O/P check:

  - 1. Turn the vehicle to the OFF (LOCK) mode.

  - 2. Jump the SCS line with the HDS, and wait more than 1 minute.

  - 3. Disconnect the following connector.

  PCM connector C (51P)

  - 4. Measure the resistance between test points 1 and 2.

  Test condition	Vehicle OFF (LOCK) mode
  	PCM connector C (51P): disconnected
  Test point 1	PCM connector C (51P) No. 17
  Test point 2	Body ground

  Is there 10.6-13.5 Ω?

  YES 

  The shift solenoid valve O/P is OK. Update the PCM if it does not have the latest software , or substitute a known-good PCM , then recheck. If DTC P281D goes away and the PCM was updated, troubleshooting is complete. If DTC P281D goes away and the PCM was substituted, replace the original PCM .

  NO 

  Go to step 3.

• 3. Shorted wire check (SOL C line):

  - 1. Disconnect the following connector.

  Solenoid wire harness A 8P connector

  Courtesy of HONDA, U.S.A., INC.

  - 2. Check for continuity between test points 1 and 2.

  Test condition	Vehicle OFF (LOCK) mode
  	Solenoid wire harness A 8P connector: disconnected
  	PCM connector C (51P): disconnected
  Test point 1	PCM connector C (51P) No. 17
  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.

  NO 

  Go to step 4.

• 4. Shift solenoid valve O/P internal resistance check:

  - 1. Disconnect the following connector.

  Shift solenoid valve O/P 2P connector

  - 2. Measure the resistance between test points 1 and 2.

  Test condition	Vehicle OFF (LOCK) mode
  	Shift solenoid valve O/P 2P connector: disconnected
  Test point 1	Shift solenoid valve O/P 2P connector No. 1
  Test point 2	Body ground

  Courtesy of HONDA, U.S.A., INC.

  Is there 10.6-13.5 Ω?

  YES 

  The shift solenoid valve O/P is OK. 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.

  NO 

  Faulty the shift solenoid valve O/P. Replace the shift solenoid valve O/P .