CVT

P0720 OUTPUT SPEED SENSOR

Description

The secondary speed sensor detects the revolution of the CVT output shaft and emits a pulse signal. The pulse signal is sent to the TCM, which converts it into vehicle speed.


CONSULT Reference Value in Data Monitor Mode

Remarks: Specification data are reference values.







On Board Diagnosis Logic

- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P0720" with CONSULT is detected TCM does not receive the proper signal from the sensor.


Possible Cause

- Harness or connectors (Sensor circuit is open or shorted.)
- Secondary speed sensor


DTC Confirmation Procedure


CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch OFF and wait at least 10 seconds before performing the next test.
After the repair, touch "ERASE" on "SELF-DIAG RESULTS" and then perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT

1.Turn ignition switch ON and select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT.
2.Start engine and maintain the following conditions for at least 12 consecutive seconds.

ACC PEDAL OPEN: More than 1.0/8
RANGE: "D" position
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving conditions required for this test.

3.If DTC is detected, go to .

WITH GST

Follow the procedure "WITH CONSULT".


Wiring Diagram - CVT - SESCVT







TCM TERMINALS AND REFERENCE VALUES

Trouble Diagnosis .


Diagnosis Procedure


1. CHECK INPUT SIGNAL

With CONSULT
1.Start engine.
2.Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT.
3.Start vehicle and read out the value of "VSP SENSOR".





OK or NG
OK- GO TO 8.
NG- GO TO 2.

2. CHECK SECONDARY SPEED SENSOR

With CONSULT
1.Start engine.
2.Check power supply to secondary speed sensor by voltage between TCM connector terminals 10, 19 and
42. Trouble Diagnosis .










3.If OK, check the pulse when vehicle cruises.










OK or NG
OK - GO TO 8.
NG- GO TO 3.

3. CHECK POWER AND SENSOR GROUND

1.Turn ignition switch OFF.
2.Disconnect the secondary speed sensor harness connector.
3.Turn ignition switch ON.





4.Check voltage between secondary speed sensor harness connector terminals.










5.Check voltage between secondary speed sensor harness connector terminal and ground.





6.If OK, check harness for short to ground and short to power.
7.Reinstall any part removed.
OK or NG
OK- GO TO 4.
NG - 1 - Battery voltage is not supplied between terminals 1 and 3, terminals 1 and ground.: GO TO 6.
NG - 2 - Battery voltage is not supplied between terminals 1 and 3 only.: GO TO 7.

4. CHECK HARNESS BETWEEN TCM AND SECONDARY SPEED SENSOR

1.Turn ignition switch OFF.
2.Disconnect TCM connector and secondary speed sensor harness connector.





3.Check continuity between TCM connector terminal and secondary speed sensor harness connector terminal.





4.If OK, check harness for short to ground and short to power.
5.Reinstall any part removed.
OK or NG
OK- GO TO 5.
NG- Repair open circuit or short to ground or short to power in harness or connectors.

5. CHECK THE TCM SHORT

Replace same type TCM, perform self-diagnosis check. Erase self-diagnostic results and them drive the vehicle [more than 40 km/h (25 MPH)], perform self-diagnosis check. .
Is "P0720" detected again?
YES- Replace the secondary speed sensor. Removal And Installation.
NO- Replace TCM. Service and Repair.

6. CHECK HARNESS BETWEEN TCM AND SECONDARY SPEED SENSOR (POWER)

1.Turn ignition switch OFF.
2.Disconnect TCM connector and secondary speed sensor harness connector.





3.Check continuity between TCM connector terminals and secondary speed sensor harness connector terminal. Trouble Diagnosis .





4.If OK, check harness for short to ground and short to power.
5.Reinstall any part removed.
OK or NG
OK- 10 A fuse (No. 49, located in the IPDM E/R) or ignition switch are malfunctioning.
NG- Repair open circuit or short to ground or short to power in harness or connectors.

7. CHECK HARNESS BETWEEN TCM AND SECONDARY SPEED SENSOR (SENSOR GROUND)

1.Turn ignition switch OFF.
2.Disconnect TCM connector and secondary speed sensor harness connector.





3.Check continuity between TCM connector terminal and secondary speed sensor harness connector terminal.





4.If OK, check harness for short to ground and short to power.
5.Reinstall any part removed.
OK or NG
OK- GO TO 8.
NG- Repair open circuit or short to ground or short to power in harness or connectors.

8. CHECK DTC

Perform .
OK or NG
OK-INSPECTION END
NG- GO TO 9.

9. CHECK TCM

1.Check TCM input/output signals. Trouble Diagnosis .
2.If NG, re-check TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK-INSPECTION END
NG- Repair or replace damaged parts.