STEP 2. Measure the output wave pattern of the select pressure solenoid valve at TCM connector (LBLS terminal).
(1) Connect the CVT assembly connector.
(2) Engine: Idling
(3) When the vehicle is stationary
(4) Selector lever position: N
(5) Connect an oscilloscope, and measure the voltage between TCM connector LBLS terminal and body ground.OK: A wave pattern such as the one shown on (Check Procedure Using an Oscilloscope) should be output. There should be no noise in the output wave pattern. Is the check result normal?
Go to Step 3. Refer to diagnostic trouble code No.P2720: Malfunction of Select Pressure Solenoid Valve (low input) , or diagnostic trouble code No.P2721: Malfunction of Select Pressure Solenoid Valve (high input) .