5AT RE5R05A

P0720 OUTPUT SPEED SENSOR





Description
The output speed sensor detects the revolution of the parking gear and emits a pulse signal. The pulse signal is sent to the TCM which converts it into vehicle speed.




CONSULT-III Reference Value in Data Monitor Mode









On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P0720" with CONSULT-III or 1st judgment flicker without CONSULT-III is detected under the following conditions.
- When TCM does not receive the proper voltage signal from the sensor.
- After ignition switch is turned ON, irregular signal input from vehicle speed signal before the vehicle starts moving.




Possible Cause
- Harness or connectors
(Sensor circuit is open or shorted.)
- Output speed sensor
- Vehicle speed signal




DTC Confirmation Procedure

CAUTION:
- Always drive vehicle at a safe speed.
- Be careful not to rev engine into the red zone on the tachometer.

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, perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT-III
1. Start the engine.
2. Select "DATA MONITOR" in "TRANSMISSION".
3. Drive vehicle and check for an increase of "VHCL/S SE-A/T" value in response to "VHCL/S SE-MTR" value.
If the check result is NG, go to 5AT RE5R05A.
If the check result is OK, go to following step.
4. Select "DATA MONITOR" in "TRANSMISSION".
5. Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.

VHCL/S SE-A/T : 30 km/h (19 MPH) or more
ACCELE POSI : More than 1.0/8
SLCT LVR POSI : "D" position
Driving location : Driving the vehicle uphill (increased engine load) will help maintain the driving conditions required for this test.

If the check result is NG, go to 5AT RE5R05A.
If the check result is OK, go to following step.
6. Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.

ENGINE SPEED : 3,500 rpm or more
ACCELE POSI : More than 1.0/8
SLCT LVR POSI : "D" position
Driving location : Driving the vehicle uphill (increased engine load) will help maintain the driving conditions required for this test.

7. If DTC is detected, go to 5AT RE5R05A.

WITH GST
Follow the procedure "WITH CONSULT-III".




Wiring Diagram - AT - VSSA/T




Diagnosis Procedure
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch ON.
2. Select "DATA MONITOR" in "TRANSMISSION".
3. Start engine.
4. Read out the value of "VHCL/S SE-A/T" while driving. Check the value changes according to driving speed. Refer to 5AT RE5R05A.
OK or NG
OK - GO TO 6.
NG - GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to Main Power Supply and Ground Circuit.
OK or NG
OK - GO TO 3.
NG - Repair or replace damaged parts.
3.DETECT MALFUNCTIONING ITEM
Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - GO TO 4.
NG - Repair or replace damaged parts.
4.CHECK SUB-HARNESS
1. Remove control valve with TCM. Refer to Service and Repair.
2. Disconnect transmission range switch connector and TCM connector.





3. Check continuity between transmission range switch connector
(A) terminals and TCM connector (B) terminals.





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 - Replace open circuit or short to ground and short to power in harness or connectors.
5.REPLACE THE OUTPUT SPEED SENSOR AND CHECK DTC
1. Replace the output speed sensor. Refer to Service and Repair (2WD models) or Component (AWD models).
2. Perform 5AT RE5R05A.
OK or NG
OK INSPECTION END
NG - Replace the control valve with TCM. Refer to Service and Repair.
6.CHECK DTC
Perform 5AT RE5R05A.
OK or NG
OK INSPECTION END
NG - GO TO 2.