U660E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: P0798; Pressure Control Solenoid "C" Electrical (Shift Solenoid Valve SL3); 2016 MY Sienna [12/2015

Last Modified: 04-05-2023	6.11:8.1.0	Doc ID: RM100000000VIL2
Model Year Start: 2016	Model: Sienna	Prod Date Range: [12/2015 - 08/2016]
Title: U660E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: P0798; Pressure Control Solenoid "C" Electrical (Shift Solenoid Valve SL3); 2016 MY Sienna [12/2015 - 08/2016]

DTC

P0798

Pressure Control Solenoid "C" Electrical (Shift Solenoid Valve SL3)

DESCRIPTION

Changing from 1st to 6th is performed by the TCM turning shift solenoid valves SL1, SL2, SL3, SL4 and SL on and off. If an open or short circuit occurs in any of the shift solenoid valves, the TCM controls the remaining normal shift solenoid valves to allow the vehicle to be operated (See page ).

DTC No.	DTC Detection Condition	Trouble Area
P0798	An open or short circuit (output signal duty is 0% or 100%) is detected by the TCM in the shift solenoid valve SL3 circuit while driving and shifting gears (SL3 output signal duty is more than 3% and less than 100% under normal conditions) (1-trip detection logic).	Open or short in shift solenoid valve SL3 circuit Shift solenoid valve SL3 Transmission wire TCM

MONITOR DESCRIPTION

The TCM commands gear shifts by turning the shift solenoid valves on or off. When there is an open or short circuit in any shift solenoid valve circuit, the TCM detects the problem and illuminates the MIL and stores the DTC. The TCM also performs the fail-safe function and turns the other normal shift solenoid valves on or off (In case of an open or short circuit, the TCM stops sending current to the circuit.)

(See page ).

MONITOR STRATEGY

All

Related DTCs	P0798: Shift solenoid valve SL3/Range check
Required sensors/Components	Shift solenoid valve SL3
Frequency of operation	Continuous
Duration	1 second
MIL operation	Immediate
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

All:

The monitor will run whenever this DTC is not present	None
Ignition switch	ON
Starter	OFF

Condition (A):

One of the following conditions is met: (a) or (b)

a. Battery voltage	12 V or more
b. All of the following conditions are met
Battery voltage	10 V or more and less than 12 V
Target current	Less than 0.75 A

Condition (B):

Battery voltage	8 V or more
Target current	0.25 A or more

TYPICAL MALFUNCTION THRESHOLDS

Condition (A):

Output duty cycle

100% or more

Condition (B):

Output duty cycle

0% or less

COMPONENT OPERATING RANGE

Output duty cycle

More than 3% and less than 100%

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Perform the universal trip to clear permanent DTCs (See page ).

PROCEDURE

1.	INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL3)

(a) Remove the TCM from the transaxle.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
16 (SL3+) - 15 (SL3-)	20°C (68°F)	5.0 to 5.6 Ω
16 (SL3+) - Body ground	Always	10 kΩ or higher
15 (SL3-) - Body ground	Always	10 kΩ or higher
16 (SL3+) - All other terminals except 15 (SL3-)	Always	10 kΩ or higher
15 (SL3-) - All other terminals except 16 (SL3+)	Always	10 kΩ or higher

Text in Illustration

*a	Component without harness connected: (Transmission Wire)

REPLACE TCM

2.	INSPECT SHIFT SOLENOID VALVE SL3

(a) Remove shift solenoid valve SL3.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
1 - 2	20°C (68°F)	5.0 to 5.6 Ω

Text in Illustration

*a	Component without harness connected: (Shift Solenoid Valve SL3)

(c) Connect a battery positive (+) lead with a 21 W bulb to terminal 2 and a negative (-) lead to terminal 1 of the solenoid valve connector. Then check that the valve moves and makes an operating sound.

OK:

Valve moves and makes an operating sound.

REPLACE TRANSMISSION WIRE

REPLACE SHIFT SOLENOID VALVE SL3