DTC P0721: Output Speed Sensor Circuit Range / Performance [06/2016 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and push the Techstream main switch ON.
3. Read the DTCs using the Techstream (Refer to DTC CHECK / CLEAR [06/2016 - ] ).

   Result

   Display (DTC output)	Proceed to
   DTC is not output	A
   DTC is output	B
   CAN communication system DTC is output	C

Result: 

B 

GO TO DTC CHART 

(Refer to DIAGNOSTIC TROUBLE CODE CHART [06/2016 - ] )

Result: 

C 

GO TO CAN COMMUNICATION SYSTEM 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2016 - 03/2017] Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2017 - ] )

Result: 

A 

See step  2

1. Check the transmission revolution sensor (SP2) installation.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a	Correct
   *b	Incorrect
   *c	No clearance

   OK

   The installation bolt is tightened properly and there is no clearance between the sensor and transmission case.

Result: 

NG 

SECURELY INSTALL TRANSMISSION REVOLUTION SENSOR (SP2) OR REPLACE TRANSMISSION REVOLUTION SENSOR (SP2) 

Result: 

OK 

See step  3

1. Disconnect the L3 transmission revolution sensor (SP2) connector.
2. Perform inspection of the transmission revolution sensor (SP2) (Refer to INSPECTION [06/2016 - ] ).
3. Connect the L3 transmission revolution sensor (SP2) connector.

Result: 

NG 

REPLACE TRANSMISSION REVOLUTION SENSOR (SP2) 

(Refer to REMOVAL [06/2016 - ] )

Result: 

OK 

See step  4

1. Disconnect the A19 TCM connector.
2. Disconnect the L3 transmission revolution sensor (SP2) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L3-1 (SP2-) - A19-7 (SP2-)	Always	Below 1 Ω
   L3-2 (SP2+) - A19-18 (SP2+)	Always	Below 1 Ω
   A19-7 (SP2-) - Body ground	Always	10 kΩ or higher
   A19-18 (SP2+) - Body ground	Always	10 kΩ or higher

4. Connect the A19 TCM connector.
5. Connect the L3 transmission revolution sensor (SP2) connector.

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Replace the TCM (Refer to REMOVAL [06/2016 - ] ).

Result: 

NEXT 

PERFORM THE RESET MEMORY