DTC P0791: Intermediate Shaft Speed Sensor "A" Circuit; DTC P0793: Intermediate Shaft Speed Sensor "A" [12/2012 - 10/2015]: Procedure

1. Remove the transmission valve body assembly.

   Refer to REMOVAL [12/2012 - ]

2. Make sure that the connector is properly connected, and check the transmission revolution sensor installation.

   OK

   The installation bolts are tightened properly and there is no clearance between the sensor and transaxle case.

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

SECURELY INSTALL OR REPLACE TRANSMISSION REVOLUTION SENSOR. Refer to  REMOVAL [12/2012 - ] 

Result: 

OK 

See step  2

1. Disconnect the transmission revolution sensor connector.

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

   *1	Transmission Wire
   *a	Transmission Revolution Sensor Side
   *b	Wiring Harness Connector Side

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   NCB transmission revolution sensor side - A-4 (NCB) wiring harness connector side	Always	Below 1 Ω
   NCO transmission revolution sensor side - A-3 (NCO) wiring harness connector side	Always	Below 1 Ω
   NCB transmission revolution sensor side or A-4 (NCB) wiring harness connector side - Body ground and other terminals	Always	10 kΩ or higher
   NCO transmission revolution sensor side or A-3 (NCO) wiring harness connector side - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE TRANSMISSION WIRE. Refer to  REMOVAL [12/2012 - ] 

Result: 

OK 

See step  3

1. Disconnect the B78 wiring harness connector.
2. Disconnect the B77 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B78-4 (NCB) - B77-118 (NCB)	Always	Below 1 Ω
   B78-3 (NCO) - B77-117 (NCO)	Always	Below 1 Ω
   B78-4 (NCB) or B77-118 (NCB) - Body ground and other terminals	Always	10 kΩ or higher
   B78-3 (NCO) or B77-117 (NCO) - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Remove the wiring harness connector.

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

   *1	Wiring Harness Connector	-	-
   *a	Transmission Wire Side	*b	ECM Side

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A-4 (NCB) - B78-4 (NCB)	Always	Below 1 Ω
   A-3 (NCO) - B78-3 (NCO)	Always	Below 1 Ω
   A-4 (NCB) - All other terminals except B78-4 (NCB)	Always	10 kΩ or higher
   A-3 (NCO) - All other terminals except B78-3 (NCO)	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE WIRING HARNESS CONNECTOR. Refer to  REMOVAL [12/2012 - 08/2017] 

Result: 

OK 

See step  5

1. Replace the transmission revolution sensor.

   Refer to REMOVAL [12/2012 - ]

Result: 

NEXT 

See step  6

1. Connect the Techstream to the DLC3.
2. Start the engine and turn the Techstream on.
3. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [12/2012 - ]

   HINT: 

   Write down the currently output DTCs before clearing them.

   Powertrain > Engine and ECT > Clear DTCs 

4. Perform the monitor drive pattern.

   Refer to MONITOR DRIVE PATTERN [12/2012 - ]

5. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

   Powertrain > Engine and ECT > Trouble Codes 

6. Read the DTCs using the Techstream.

   Result

   Result	Proceed to
   Only P0791 or P0793 is output	A
   DTCs are not output	B

Result: 

A 

REPLACE ECM. Refer to  REMOVAL [12/2012 - ] 

Result: 

B 

END