P0722

K41B CVT: CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: P0720, P0722: Output Speed Sensor Circuit
P0722 - Output Speed Sensor Circuit No Signal

DESCRIPTION

The ECM receives a signal from the secondary pulley speed sensor (transmission revolution sensor (NOUT)) installed in the continuously variable transaxle and determines the output shaft speed in order to control the gear ratio.

The transmission revolution sensor (NOUT) detects the continuously variable transaxle output shaft speed and sends it to the ECM.





MONITOR DESCRIPTION

The ECM receives a signal from the secondary pulley speed sensor (transmission revolution sensor (NOUT)) installed in the continuously variable transaxle and determines the output shaft speed in order to control the gear ratio.

If the ECM detects no signal from the secondary pulley speed sensor even while the vehicle is moving, it will conclude that there is a malfunction in the secondary pulley speed sensor. The ECM will illuminate the MIL and set the DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

All





P0720:





P0722:

All of the following conditions are met:





TYPICAL MALFUNCTION THRESHOLDS

P0720:





P0722:





COMPONENT OPERATING RANGE

P0720:





P0722:





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
Perform the universal trip to clear permanent DTCs Reading and Clearing Diagnostic Trouble Codes.

PROCEDURE

1. READ VALUE USING TECHSTREAM (SPD (NOUT))

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine and ECT / Data List.

(e) In accordance with the display on the Techstream, read the Data List.





Result





B -- REPLACE ECM
A -- Continue to next step.

2. INSPECT TRANSMISSION REVOLUTION SENSOR (NOUT)

(a) Remove the transmission revolution sensor (NOUT) Removal and then connect the battery.

(b) Wave a magnetic object left and right in front of the transmission revolution sensor tip (5 mm gap or closer) to change the high/low signals while measuring the current.





NOTICE:
Make sure to wave the magnetic object during the inspection. Current will not change without waving the magnetic object as indicated by the arrow in the illustration.

(c) Measure the current according to the value(s) in the table below.

Standard Current:





Text in Illustration





NG -- REPLACE TRANSMISSION REVOLUTION SENSOR (NOUT) Removal
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (TRANSMISSION REVOLUTION SENSOR (NOUT) - ECM)

(a) Disconnect the ECM connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. REPLACE ECM P0705

NEXT -- Continue to next step.

5. PERFORM INITIALIZATION P0705

NEXT -- END