P0720

P0720 OUTPUT SPEED SENSOR





Description
- Secondary speed sensor is installed to the upper side of converter housing.
- Secondary speed sensor detects secondary pulley speed.
- Secondary speed sensor converts secondary pulley speed to pulse signal and transmits the signal to TCM.
- TCM converts pulse signal to vehicle speed.




DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE

CAUTION:
Always drive vehicle at a safe speed.
1.PRECONDITIONING
Immediately after performing any "DTC CONFIRMATION PROCEDURE", always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.
- GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Start the engine.
2. Select "Data Monitor" in "TRANSMISSION".
3. Select "PRI SPEED" and "VEHICLE SPEED".
4. Drive the vehicle.
5. Maintain the following conditions for 5 seconds or more.





6. Stop the vehicle.
7. Select "Self Diagnostic Results" in "TRANSMISSION".
With GST
Follow the procedure "With CONSULT-III".
Is "P0720" detected?
YES - Go to P0720.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK SECONDARY SPEED SENSOR POWER CIRCUIT
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 terminal and ground.





Is the inspection result normal?
YES - GO TO 2.
NO - GO TO 5.
2.CHECK TCM INPUT SIGNAL
1. Turn ignition switch OFF.
2. Connect secondary speed sensor connector.
3. Lift the vehicle.
4. Start the engine.
5. Check frequency of secondary speed sensor.





Is the inspection result normal?
YES - GO TO 8.
NO - GO TO 3.
3.CHECK HARNESS BETWEEN TCM AND SECONDARY SPEED SENSOR (PART 1)
1. Turn ignition switch OFF.
2. Disconnect TCM connector and secondary speed sensor connector.
3. Check continuity between TCM vehicle side harness connector terminals and secondary speed sensor vehicle side harness connector terminals.





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 2)
Check continuity between TCM vehicle side harness connector terminals and ground.





Is the inspection result normal?
YES - GO TO 8.
NO - Repair or replace damaged parts.
5.CHECK HARNESS BETWEEN SECONDARY SPEED SENSOR (POWER) AND IPDM E/R (PART 1)
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between secondary speed sensor vehicle side harness connector terminal and IPDM E/R vehicle side harness connector terminal.





Is the inspection result normal?
YES - GO TO 6.
NO - Repair or replace damaged parts.
6.CHECK HARNESS BETWEEN SECONDARY SPEED SENSOR (POWER) AND IPDM E/R (PART 2)
Check continuity between secondary speed sensor vehicle side harness connector terminal and ground.





Is the inspection result normal?
YES - GO TO 7.
NO - Repair or replace damaged parts.
7.DETECT MALFUNCTIONING ITEMS
Check the following.
- IPDM E/R
- 10A fuse (No.55, located in the IPDM E/R)
- Harness for short or open between IPDM E/R and ignition switch ( Ignition Power Supply.)
- Ignition switch
Is the inspection result normal?
YES - Check intermittent incident. Intermittent Incident.
NO - Repair or replace damaged parts.
8.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
Is the inspection result normal?
YES - Replace secondary speed sensor. Exploded View.
NO - Repair or replace damaged parts.