P0720

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 transmitted to the TCM, which converts it into vehicle speed.


DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


CAUTION:
Always drive vehicle at a safe speed.
NOTE:
Immediately after performing any "DTC CONFIRMATION PROCEDURE", always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.

1. CHECK DTC DETECTION

With CONSULT
1.Turn ignition switch ON.
2.Select "Data Monitor" in "TRANSMISSION".
3.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.

With GST
Follow the procedure "With CONSULT".
Is "P0720" detected?
YES- Go to Diagnosis Procedure (see below).
NO- Check intermittent incident. Intermittent Incident.


Diagnosis Procedure


1. CHECK SECONDARY SPEED SENSOR

With CONSULT
1.Start engine.
2.Check voltage between TCM connector terminals.





3.If OK, check pulse when vehicle drive.





Is the inspection result normal?
YES- GO TO 11.
NO- GO TO 2.

2. CHECK POWER AND SENSOR GROUND

1.Turn ignition switch OFF.
2.Disconnect secondary speed sensor connector.
3.Turn ignition switch ON.
4.Check voltage between secondary speed sensor vehicle side harness connector terminals.





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





Is the inspection result normal?
YES- GO TO 3.
NO-1 (Battery voltage is not supplied between terminals 1 and 3, terminal 3 and ground)-GO TO 6.
NO-2 (Battery voltage is not supplied between terminals 1 and 3 only)-GO TO 8.

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

1.Turn ignition switch OFF.
2.Disconnect TCM connector.
3.Check continuity between TCM vehicle side harness connector terminal and ground.





Is the inspection result normal?
YES- GO TO 4.
NO- Repair or replace damaged parts.

4. CHECK HARNESS BETWEEN TCM AND SECONDARY SPEED SENSOR (PART 1)

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





Is the inspection result normal?
YES- GO TO 5.
NO- Repair or replace damaged parts.

5. CHECK HARNESS BETWEEN TCM AND SECONDARY SPEED SENSOR (PART 2)

Check continuity between TCM vehicle side harness connector terminal and ground.





Is the inspection result normal?
YES- GO TO 10.
NO- Repair or replace damaged parts.

6. CHECK HARNESS BETWEEN IPDM E/R AND SECONDARY SPEED SENSOR (POWER) (PART 1)

1.Turn ignition switch OFF.
2.Disconnect IPDM E/R connector.
3.Check continuity between IPDM E/R vehicle side harness connector terminal and secondary speed sensor vehicle side harness connector terminal.





Is the inspection result normal?
YES- GO TO 7.
NO- Repair or replace damaged parts.

7. CHECK HARNESS BETWEEN IPDM E/R AND SECONDARY SPEED SENSOR (POWER) (PART 2)

Check continuity between IPDM E/R vehicle side harness connector terminal and ground.





Is the inspection result normal?
YES-Check the following.
- Harness for short or open between ignition switch and IPDM E/R
- 10A fuse (No. 58, located in IPDM E/R)
- Ignition switch
NO- Repair or replace damaged parts.

8. CHECK HARNESS BETWEEN TCM AND SECONDARY SPEED SENSOR (SENSOR GROUND) (PART 1)

1.Turn ignition switch OFF.
2.Disconnect TCM connector.
3.Check continuity between TCM vehicle side harness connector terminal and secondary speed sensor vehicle side harness connector terminal.





Is the inspection result normal?
YES- GO TO 9.
NO- Repair or replace damaged parts.

9. CHECK HARNESS BETWEEN TCM AND SECONDARY SPEED SENSOR (SENSOR GROUND) (PART 2)

Check continuity between TCM vehicle side harness connector terminal and ground.





Is the inspection result normal?
YES- GO TO 10.
NO- Repair or replace damaged parts.

10. CHECK TCM

1.Replace with the same type of TCM. Exploded View.
2.Connect each connector.
3.Perform "DTC CONFIRMATION PROCEDURE". .
Is "P0720" detected?
YES- Replace secondary speed sensor. Exploded View.
NO- Replace TCM. Exploded View.

11. DETECT MALFUNCTIONING ITEMS

Check TCM connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES- Replace TCM. Exploded View.
NO- Repair or replace damaged parts.