DTC P0791: Intermediate Shaft Speed Sensor "A" Circuit; DTC P0793: Intermediate Shaft Speed Sensor "A" [12/2013 - 11/2016]: Procedure

WARNING: This page is about a different car, the 2016 Toyota Highlander, 2015 Toyota Highlander, and 2014 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT TRANSMISSION REVOLUTION SENSOR (SPEED SENSOR INSTALLATION)

Remove the valve body assembly.

Make sure that the connector is properly connected, and check the speed sensor installation.

Refer to INSTALLATION [12/2013 - 11/2016]

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

The installation bolts are tightened properly and there is no clearance between the sensor and valve body assembly.

Result

Proceed to
OK
NG

Result: 2

REPAIR OR REPLACE TRANSMISSION REVOLUTION SENSOR. Refer to COMPONENTS [12/2013 - 11/2016]

Result: 1

See step 2

INSPECT TRANSMISSION WIRE

Remove the TCM.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Component without harness connected (Transmission Wire)	*b	TCM side
*c	Sensor side	-	-

Disconnect the speed sensor connector from the transmission wire.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
3 (NCO) sensor side - 3 (NCO) TCM side	Always	Below 1 Ω
4 (NCB) sensor side - 4 (NCB) TCM side	Always	Below 1 Ω
3 (NCO) sensor side - Body ground and other terminals	Always	10 kΩ or higher
4 (NCB) sensor side - Body ground and other terminals	Always	10 kΩ or higher

Result

Proceed to
OK
NG

Result: 2

REPLACE TRANSMISSION WIRE. Refer to COMPONENTS [12/2013 - 11/2016]

Result: 1

See step 3

REPLACE TRANSMISSION REVOLUTION SENSOR
Refer to COMPONENTS [12/2013 - 11/2016]

Result

Proceed to

NEXT

Result: 1

NEXT

See step 4

Proceed to
NEXT

CHECK IF DTC OUTPUT RECURS (SEE IF DTC P0791 AND/OR P0793 IS OUTPUT AGAIN)

Connect the Techstream to the DLC3.
Start the engine and turn the Techstream on.
Clear the DTCs.
Refer to DTC CHECK / CLEAR [12/2013 - 11/2016]

HINT:

Write down the currently output DTCs before clearing them.

Powertrain > ECT > Clear DTCs
Perform the monitor drive pattern.
Refer to MONITOR DRIVE PATTERN [12/2013 - 11/2016]
Enter the following menus: Powertrain / ECT / Trouble Codes.
Powertrain > ECT > Trouble Codes

Read the DTCs using the Techstream.

Result

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

Result: 1

REPLACE TCM. Refer to COMPONENTS [12/2013 - 11/2016]

Result: 2

END