DTC P2721: Pressure Control Solenoid "D" Control Circuit High

NOTE:

Before you troubleshoot, review the General Troubleshooting Information - Refer to: How to Troubleshoot the Fuel and Emissions Systems How 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 Description	Confirmed DTC	Pending DTC	Freeze Frame
P2721 Pressure Control Solenoid "D" Control Circuit High

DTC (CVT)

1. Problem verification:

- 1. Turn the vehicle to the ON mode.

- 2. Clear the DTC with the HDS.

- 3. Start the engine, and wait for at least 1 second.

- 4. Check for Pending or Confirmed DTCs with the HDS.

DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
P2721 Pressure Control Solenoid "D" Control Circuit High

Is DTC P2721 indicated?

YES

The failure is duplicated. Go to step 2.

Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals between the CVT lock-up clutch control solenoid valve 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. CVT lock-up clutch control solenoid valve 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. 3
Test point 2	Body ground

Is there 5.0-6.3 Ω?

YES

The CVT lock-up clutch control solenoid valve is OK. Update the PCM if it does not have the latest software , or substitute a known-good PCM , then recheck. If DTC P2721 goes away and the PCM was updated, troubleshooting is complete. If DTC P2721 goes away and the PCM was substituted, replace the original PCM .

Go to step 3.

3. Shorted wire check (LCLS line to power):

- 1. Disconnect the following connector.

Solenoid wire harness A 8P connector

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

- 2. Turn the vehicle to the ON mode.

- 3. Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
	Solenoid wire harness A 8P connector : disconnected
	PCM connector C (51P): disconnected
Test point 1	PCM connector C (51P) No. 3
Test point 2	Body ground

Is there voltage?

YES

Repair a short to power in the LCLS wire between the solenoid wire harness A 8P connector and the PCM.

The LCLS wire is not shorted to power. Go to step 4.

4. Open wire check (LCLS line):

- 1. 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	Solenoid wire harness A 8P connector No. 4
Test point 2	PCM connector C (51P) No. 3

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

Is there continuity?

YES

Go to step 5.

Repair an open in the LCLS wire between the solenoid wire harness A 8P connector and the PCM.

5. Open wire check (GND1 line, GND2 line):

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

- 2. Disconnect the following connectors.

PCM connector B (51P)

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

Test condition	Vehicle OFF (LOCK) mode
	PCM connector B (51P): disconnected
Test Circuit 1
Test point 1	PCM connector B (51P) No. 11
Test point 2	Body ground
Test Circuit 2
Test point 1	PCM connector B (51P) No. 12
Test point 2	Body ground

Is there continuity?

YES

Go to step 6.

Repair an open in GND1 wire and/or GND2 wire between the PCM and body ground (G101), or repair poor body ground (G101).

6. CVT lock-up clutch control solenoid valve internal resistance check:

- 1. Remove the lower valve body .

- 2. Disconnect the following connector.

CVT lock-up clutch control solenoid valve 2P connector

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

Test condition	Vehicle OFF (LOCK) mode
	Lower valve body: removed
	Solenoid wire harness B 6P connector: disconnected
	CVT lock-up clutch control solenoid valve 2P connector: disconnected
Test point 1	CVT lock-up clutch control solenoid valve 2P connector No. 1
Test point 2	CVT lock-up clutch control solenoid valve 2P connector No. 2

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

Is there 5.0-6.3 Ω?

YES

Go to step 7.

Faulty CVT lock-up clutch control solenoid valve. Replace the lower valve body .

7. Open wire check (LCC- line):

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

Test condition

Vehicle OFF (LOCK) mode

	Lower valve body: removed
	Solenoid wire harness B 6P connector: disconnected
	CVT lock-up clutch control solenoid valve 2P connector: disconnected
Test point 1	CVT lock-up clutch control solenoid valve 2P connector No. 1
Test point 2	Body ground (lower valve body)

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

Is there continuity?

YES

Go to step 8.

Repair an open in the LCC- wire between the CVT lock-up clutch control solenoid valve and body ground (G152), or repair poor body ground (G152).

8. Determine opened wire in either solenoid wire harness A or B (LCC+ line):

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

Test condition	Vehicle OFF (LOCK) mode
	Lower valve body: removed
	Solenoid wire harness B 6P connector: disconnected
	CVT lock-up clutch control solenoid valve 2P connector: disconnected
Test point 1	Solenoid wire harness B 6P connector No. 4
Test point 2	CVT lock-up clutch control solenoid valve 2P connector No. 2

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

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

Is there continuity?

YES

Repair an open in the LCC+ wire between the solenoid wire harness A 6P connector and the solenoid wire harness A 8P connector.

Repair an open in the LCC+ wire between the CVT lock-up clutch control solenoid valve and the solenoid wire harness B 6P connector.