DTC Troubleshooting: P2720 (A/T) - Honda Accord CR/CT 2012-2017

DTC Troubleshooting: P2720

DTC P2720: A/T Clutch Pressure Control Solenoid Valve D Low 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 P2720 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
P2720 A/T Clutch Pressure Control Solenoid Valve D Low Input

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
P2720 A/T Clutch Pressure Control Solenoid Valve D Low Input

Is DTC P2720 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.?

Fuse check:

Fuse check

?1.	Press the engine start/stop button to select the OFF mode.

?2.

Check the following fuse.

Fuse	No. B8 (10 A)
Location	Under-dash fuse/relay box

Is the fuse OK?


	YES

The fuse is OK. Go to step 3.


	NO

Replace the No. B8 (10 A) fuse, and recheck. If the fuse blows again, repair a short to body ground on the No. B8 (10 A) fuse circuit, and recheck.?

Open wire check (IG1 MISS SOL line):

Open wire check (IG1 MISS SOL line)

?1.	Jump the SCS line with the HDS.

?2.

Disconnect the following connector.

PCM connector A (51P)

?3.	Press the engine start/stop button to select the ON mode.

?4.

Measure the voltage between test points 1 and 2.

Test condition	ON mode
	PCM connector A (51P): disconnected
Test circuit	IG1 MISS SOL
Test point 1	PCM connector A (51P) No. 1 (LT BLU)
Test point 2	Body ground

Is there battery voltage?


	YES

The IG1 MISS SOL wire is OK. Go to step 4.


	NO

Repair an open in the IG1 MISS SOL wire between the PCM and the No. B8 (10 A) fuse in the under-dash fuse/relay box.?

Determine possible failure area (short in LSD line, others):

Determine possible failure area (short in LSD line, others)

?1.	Press the engine start/stop button to select the OFF mode.

?2.	Reconnect PCM connector A (51P).

?3.	Jump the SCS line with the HDS.

?4.

Disconnect the following connector.

PCM connector B (51P)

?5.

Check for continuity between test points 1 and 2.

Test condition	OFF mode
	PCM connector B (51P): disconnected
Test circuit	LSD
Test point 1	PCM connector B (51P) No. 9 (TAN)
Test point 2	Body ground

Is there continuity?


	YES

Go to step 5.


	NO

Go to step 6.

Shorted wire check (LSD line):

Shorted wire check (LSD line)

?1.

Disconnect the following connector.

A/T clutch pressure control solenoid valve D 2P connector

?2.

Check for continuity between test points 1 and 2.

Test condition	OFF mode
	A/T clutch pressure control solenoid valve D 2P connector: disconnected
	PCM connector B (51P): disconnected
Test circuit	LSD
Test point 1	A/T clutch pressure control solenoid valve D 2P connector No. 2 (TAN)
Test point 2	Body ground

Is there continuity?


	YES

Repair a short to body ground in the LSD wire between A/T clutch pressure control solenoid valve D and the PCM.?


	NO

The LSD wire is OK. Faulty A/T clutch pressure control solenoid valve D. Replace the secondary valve body (A/T clutch pressure control solenoid valve D).?

Open wire check (LSD line):

Open wire check (LSD line)

?1.

Disconnect the following connector.

A/T clutch pressure control solenoid valve D 2P connector

?2.

Check for continuity between test points 1 and 2.

Test condition	OFF mode
	A/T clutch pressure control solenoid valve D 2P connector: disconnected
	PCM connector B (51P): disconnected
Test circuit	LSD
Test point 1	A/T clutch pressure control solenoid valve D 2P connector No. 2 (TAN)
Test point 2	PCM connector B (51P) No. 9 (TAN)

Is there continuity?


	YES

The LSD wire is OK. Go to step 7.


	NO

Repair an open in the LSD wire between A/T clutch pressure control solenoid valve D and the PCM.?

Open wire check (PG line):

Open wire check (PG line)

?1.

Check for continuity between test points 1 and 2.

Test condition	OFF mode
	A/T clutch pressure control solenoid valve D 2P connector: disconnected
	PCM connector B (51P): disconnected
Test circuit	PG
Test point 1	A/T clutch pressure control solenoid valve D 2P connector No. 1 (BLK)
Test point 2	Body ground

Is there continuity?


	YES

The PG wire is OK. Go to step 8.


	NO

Repair an open in the PG wire between A/T clutch pressure control solenoid valve D and body ground (G101) or repair poor body ground (G101).?

A/T clutch pressure control solenoid valve D check:

A/T clutch pressure control solenoid valve D check

?1.

Measure the resistance between test points 1 and 2.

Test condition	OFF mode
	A/T clutch pressure control solenoid valve D 2P connector: disconnected
	PCM connector B (51P): disconnected
Test circuit	LSD, PG
Test point 1	A/T clutch pressure control solenoid valve D 2P connector No. 1
Test point 2	A/T clutch pressure control solenoid valve D 2P connector No. 2

Is there 4.7?5.9 ??


	YES

A/T clutch pressure control solenoid valve D is OK. Replace the PCM.?


	NO

Faulty A/T clutch pressure control solenoid valve D. Replace the secondary valve body (A/T clutch pressure control solenoid valve D).?