U660E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: P2769,P2770; Short in Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve SL); 2016 MY Sienna [12/2015

Last Modified: 04-05-2023	6.11:8.1.0	Doc ID: RM100000000VILH
Model Year Start: 2016	Model: Sienna	Prod Date Range: [12/2015 - 08/2016]
Title: U660E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: P2769,P2770; Short in Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve SL); 2016 MY Sienna [12/2015 - 08/2016]

DTC

P2769

Short in Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve SL)

DTC

P2770

Open in Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve SL)

DESCRIPTION

Shift solenoid valve SL is turned on and off by signals from the TCM to control the hydraulic pressure acting on the lock-up relay valve, which then controls operation of the lock-up clutch.

DTC No.	DTC Detection Condition	Trouble Area
P2769	TCM detects a short in the shift solenoid valve SL circuit when the shift solenoid valve SL is operated (2 trip detection logic).	Short in shift solenoid valve SL circuit Shift solenoid valve SL Transmission wire TCM
P2770	TCM detects an open in the shift solenoid valve SL circuit when the shift solenoid valve SL is not operated (2 trip detection logic).	Open in shift solenoid valve SL circuit Shift solenoid valve SL Transmission wire TCM

Fail-safe function:

If the TCM detects a malfunction, it turns shift solenoid valve SL off.

MONITOR DESCRIPTION

Based on the signals from the throttle position sensor, the air flow meter and the crankshaft position sensor, the TCM sends a signal to shift solenoid valve SL to regulate the hydraulic pressure and provide smoother torque converter clutch engagement. Shift solenoid valve SL responds to commands from the TCM. The valve controls the lock-up relay valve to perform the torque-converter lock-up function. If the TCM detects an open or short circuit for shift solenoid valve SL, it will illuminate the MIL.

MONITOR STRATEGY

Related DTCs	P2769: Shift solenoid valve SL/Range check (Low resistance) P2770: Shift solenoid valve SL/Range check (High resistance)
Required sensors/Components	Shift solenoid valve SL
Frequency of operation	Continuous
Duration	1 time
MIL operation	2 driving cycles
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

P2769: Range check:

The monitor will run whenever the following DTCs are not present	None
Command to solenoid	ON
Time after solenoid OFF to ON	0.008 seconds or more

P2770: Range check:

The monitor will run whenever the following DTCs are not present	None
Command to solenoid	OFF
Time after solenoid ON to OFF	0.008 seconds or more

TYPICAL MALFUNCTION THRESHOLDS

P2769: Range check:

Intelligent power MOS diagnosis fail signals detected while the solenoid is operated

Fail at solenoid resistance: 8 Ω or less

P2770: Range check:

Intelligent power MOS diagnosis fail signals detected while the solenoid is not operated

Fail at solenoid resistance: 100 kΩ or more

COMPONENT OPERATING RANGE

Shift solenoid valve SL

Resistance: 11 to 15 Ω at 20°C (68°F)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

PROCEDURE

1.	INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL)

(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
6 (SL) - Body ground	20°C (68°F)	11 to 15 Ω

Text in Illustration

*a	Component without harness connected: (Transmission Wire)

REPLACE TCM

2.	INSPECT SHIFT SOLENOID VALVE SL

(a) Remove shift solenoid valve SL.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Solenoid Connector (SL) - Solenoid Body (SL)	20°C (68°F)	11 to 15 Ω

Text in Illustration

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

REPLACE TRANSMISSION WIRE

REPLACE SHIFT SOLENOID VALVE SL