DTC Advanced Diagnostics: P2720 (CVT (ECM/PCM))

DTC Advanced Diagnostics: P2720

DTC P2720:Pressure Control Solenoid D Control Circuit Low

General Description

The CVT lock-up clutch control solenoid valve controls hydraulic pressure to the torque converter clutch. The CVT lock-up clutch control solenoid valve is controlled by duty cycle output. The spool in the CVT lock-up clutch control solenoid valve moves the valve according to the current, and produces hydraulic pressure in proportion to the current. The powertrain control module (PCM) measures the current that passes through the CVT lock-up clutch control solenoid valve and uses feedback control to compensate for the difference between the measured current and the commanded one. If the measured current is not equal to the duty cycle command, the PCM detects a malfunction (open, short to ground) and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type

Execution	Continuous
Sequence	None
Duration	1 second or more
DTC Type*¹	Two drive cycles, MIL on, Shift position indicator blinks
DTC Type*²	Two drive cycles, MIL off, Shift position indicator blinks

*1: KA model

*2: Except KA models

Enable Conditions

Condition	Minimum	Maximum
12 volt battery voltage [BATTERY VOLTAGE]	10.0 V	–

[ ]: HDS Parameter

Malfunction Threshold

The measured current for the PCM’s command value is as specified here for at least 1 second.

Duty (%)	Current (A)	Failure mode
56.5 - 90.2	Less than 0.19	Low Input
More than 90.2	Less than 0.27	Low Input

Possible Cause

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

	CVT lock-up clutch control solenoid valve LCC LS line open (includes connector loose connection or disconnection)
	CVT lock-up clutch control solenoid valve LCC LS line short to ground
	CVT lock-up clutch control solenoid valve power supply line failure (includes fuse blown)
	CVT lock-up clutch control solenoid valve internal circuit short
	CVT lock-up clutch control solenoid valve internal circuit open
	PCM internal circuit failure

Confirmation Procedure

Operating Condition

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

With the HDS

None.

Diagnosis Details*¹

Conditions for setting the DTC

When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on, the shift position indicator blinks, and a Confirmed DTC and the freeze data are stored.

Conditions for clearing the DTC

The shift position indicator comes off by turning the vehicle to the OFF (LOCK) mode. The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.

Diagnosis Details*²

Conditions for setting the DTC

When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the shift position indicator blinks and a Confirmed DTC and the freeze data are stored. The MIL does not come on.

Conditions for clearing the DTC

The shift position indicator comes off by turning the vehicle to the OFF (LOCK) mode. The Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.