P2721

DTC P2719 Pressure control solenoid system D circuit (performance)
DTC P2720 Pressure control solenoid system D circuit (Low)
DTC P2721 Pressure control solenoid system D circuit (High)

Circuit description

The line pressure control solenoid ASSY (SLT) is controlled according to the duty signal which is predetermined by the transmission control computer ASSY based on signals from the accelerator position sensor and the transmission revolution sensor (SP2, NT). This adjusts line pressure to meet the throttle opening angle and engine output. The transmission control computer ASSY detects slippage of clutch, etc. based on the revolution speed of the transmission revolution sensor (SP2, NT).





Monitor description

If open or short circuit is detected in the circuit, TCM recognizes it as a malfunction.
TCM turns on MIL and records the diagnostic codes.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS
P2719: Line pressure linear solenoid (stuck feedback)





P2720: Line pressure linear solenoid (short circuit to ground/open circuit)





P2721: Line pressure linear solenoid (battery short circuit)





TYPICAL MALFUNCTION THRESHOLDS
P2719: Line pressure linear solenoid (stuck feedback)





P2720: Line pressure linear solenoid (short circuit to ground/open circuit)





P2721: Line pressure linear solenoid (battery short circuit)





Circuit figure





Inspection steps