UA80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: P08BA7F; Pressure Control Solenoid "L" Actuator Stuck Off; 2017 MY Sienna [08/2016

Last Modified: 04-05-2023	6.11:8.1.0	Doc ID: RM10000000101M5
Model Year Start: 2017	Model: Sienna	Prod Date Range: [08/2016 - 11/2017]
Title: UA80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: P08BA7F; Pressure Control Solenoid "L" Actuator Stuck Off; 2017 MY Sienna [08/2016 - 11/2017]

DTC

P08BA7F

Pressure Control Solenoid "L" Actuator Stuck Off

DESCRIPTION

Based on signals from the transmission revolution sensors (NT and NC), the actual gear is detected.

The ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical malfunctions of the shift solenoid valves, transmission valve body assembly and automatic transaxle assembly (clutch, brake, gear, etc.).

Actual gear when shift solenoid valve SL6 (without fail-safe control) malfunction occurs:

ECM commanded gear	1st	2nd	3rd	4th	5th	6th	7th	8th
*: Neutral
Actual gear during SL6 stuck ON malfunction	1st	N*	3rd	4th	5th	6th	7th	N*
Actual gear during SL6 stuck OFF malfunction	N*	2nd	3rd	4th	5th	6th	7th	8th

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P08BA7F

Pressure Control Solenoid "L" Actuator Stuck Off

1. Diagnosis Condition, 2. Malfunction Status, 3. Malfunction Time, 4. Other

SL6 stuck ON malfunction:

Engine coolant temperature is 40°C (104°F) or higher, ATF temperature is -10°C (14°F) or higher, and the vehicle is being driven with the shift lever in D (no malfunctions are detected in the shift solenoid valves SL1, SL2, SL3, SL4, SL5, SL6, SL, SLU and SLT, transmission revolution sensors (NT and NC), coolant temperature sensor, oil temperature sensor, knock sensor, electronic throttle or CAN2)
When the ECM commands the transaxle to shift to 2nd or 8th gear, the engine overruns (neutral status).
Malfunction status continues for 0.6 seconds or more
2-trip detection logic

SL6 stuck OFF malfunction:

Engine coolant temperature is 40°C (104°F) or higher, ATF temperature is -10°C (14°F) or higher, and the vehicle is being driven with the shift lever in D (no malfunctions are detected in the shift solenoid valves SL1, SL2, SL3, SL4, SL5, SL6, SL, SLU and SLT, transmission revolution sensors (NT and NC), coolant temperature sensor, oil temperature sensor, knock sensor, electronic throttle or CAN2)
When the ECM commands the transaxle to shift to 1st gear, the engine overruns (neutral status).
Malfunction status continues for 0.5 seconds or more
2-trip detection logic

Shift solenoid valve SLT
Shift solenoid valve SLU
Shift solenoid valve SL
Shift solenoid valve SL1
Shift solenoid valve SL2
Shift solenoid valve SL3
Shift solenoid valve SL4
Shift solenoid valve SL5
Shift solenoid valve SL6
Transmission valve body assembly
Torque converter assembly
Automatic transaxle assembly (clutch, brake, gear, etc.)

Comes on

DTC stored

SAE Code:

P08BB

MONITOR DESCRIPTION

The ECM commands gear shifts by turning the shift solenoid valves on and off. According to the input shaft revolution (speed) and output shaft revolution (speed), the ECM detects the actual gear (1st, 2nd, 3rd, 4th, 5th, 6th, 7th or 8th gear). When the gear commanded by the ECM and the actual gear are not the same, the ECM illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Related DTCs	P08BB: Shift solenoid valve SL6/OFF malfunction Shift solenoid valve SL6/ON malfunction
Required sensors/Components	Shift solenoid valve SL6
Frequency of operation	Continuous
Duration	0.5 sec.
MIL operation	2 driving cycles
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

All

The monitor will run whenever this DTC is not present. (Not circuit malfunction)	P0717, P07BF, P07C0 (Turbine speed sensor circuit) P0793, P07C5, P07C6 (Intermediate shaft speed sensor circuit) P0962, P0963 (Shift solenoid valve SL1 circuit) P0966, P0967 (Shift solenoid valve SL2 circuit) P0970, P0971 (Shift solenoid valve SL3 circuit) P2814, P2815 (Shift solenoid valve SL4 circuit) P281D, P281E (Shift solenoid valve SL5 circuit) P08C1, P08C2 (Shift solenoid valve SL6 circuit) P2769, P2770 (Shift solenoid valve SL circuit) P2764, P2763 (Shift solenoid valve SLU circuit) P2720, P2721 (Shift solenoid valve SLT circuit) P0117, P0118 (ECT sensor circuit) P0335, P0337, P0338 (Crankshaft Position Sensor circuit) P0712, P0713 (ATF temperature sensor circuit (TFT sensor)) P0327, P0328, P0332, P0333 (KCS sensor circuit) P0121, P0122, P0123, P0222, P0223, P0604, P0606, P060A, P060B, P060D, P060E, P061E, P0657, P0658, P2102, P2103, P2111, P2112, P2119, P2135 ((ETCS) Electronic throttle control system) U0100 (CAN communication system)
NSW switch	"D" and "not R" and "not N"
Duration time from shifting "N" to "D"	4 sec. or more
ATF temperature	-10°C (14°F) or more
Engine	Starting
Fail-safe does not active due to following malfunctions:	-
Shift solenoid valve SL1	OFF or ON malfunction (P0746)
Shift solenoid valve SL2	OFF or ON malfunction (P0776)
Shift solenoid valve SL3	OFF or ON malfunction (P0796)
Shift solenoid valve SL4	OFF or ON malfunction (P2808)
Shift solenoid valve SL5	OFF or ON malfunction (P2817)
Shift solenoid valve SL6	OFF or ON malfunction (P08BB)
Shift solenoid valve SLT	OFF malfunction (P2714)
Shift solenoid valve SLU	ON malfunction (P2757)
Shift solenoid valve SL	ON malfunction (P0741)
All shift solenoids	Not being halted
Neutral command flag	Not met

OFF malfunction

ECM selected gear	3rd
First neutral state detection is fixed in 1st gear	-
Turbine speed - Output speed x (3rd gear ratio)	Less than 50 rpm

ON malfunction (A)

ECM selected gear	3rd
First neutral state detection is fixed in 2nd gear	-
Turbine speed - Output speed x (3rd gear ratio)	Less than 50 rpm

ON malfunction (B)

ECM selected gear	5th
First neutral state detection is fixed in 8th gear	-
Turbine speed - Output speed x (5th gear ratio)	Less than 50 rpm

ON malfunction (C)

Calculated load value	-
When A/C off	16% or more
When A/C on	19% or more
Throttle valve opening angle	3% or more

TYPICAL MALFUNCTION THRESHOLDS

OFF malfunction

When either conditions below is met: OFF malfunction (A) or (B)

OFF malfunction (A)

ECM selected gear

3rd

Turbine speed/Output speed (NT/NO)

1.91 or more and 2.189 or less

(When Output speed less than 350 rpm)

Turbine speed - Output speed x 3rd gear ratio

-50 rpm or more and 50 rpm or less

(When Output speed 350 rpm or more)

OFF malfunction (B)

Shift solenoid valve SLT	ON malfunction
ECM selected gear	1st
1st gear pass detection	Not fixed after transition to latest gear

ON malfunction

When one of the following conditions is met: ON malfunction (A), (B), (C) or (D)

ON malfunction (A)

ECM selected gear

3rd

Turbine speed/Output speed (NT/NO)

1.91 or more and 2.189 or less

(When Output speed less than 350 rpm)

Turbine speed - Output speed x 3rd gear ratio

-50 rpm or more and 50 rpm or less

(When Output speed 350 rpm or more)

ON malfunction (B)

ECM selected gear

5th

(a) Turbine speed/Output speed (NT/NO)

1.142 or more and 1.323 or less

(When Output speed less than 550 rpm)

Turbine speed - Output speed x 5th gear ratio

-50 rpm or more and 50 rpm or less

(When Output speed 550 rpm or more)

ON malfunction (C)

Shift solenoid valve SLT	ON malfunction
Following condition met	a. or b.
a. ECM selected gear	2nd
2nd gear pass detection	Not fixed after transition to latest gear
b. ECM selected gear	8th
8th gear pass detection	Not fixed after transition to latest gear

CONFIRMATION DRIVING PATTERN

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

HINT:

After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
When clearing the permanent DTCs, refer to the Clear Permanent DTC procedure.
Click here

Connect the Techstream to the DLC3.
Turn the ignition switch to ON and turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Turn the ignition switch to ON and turn the Techstream on.
Start the engine.
Perform the D Position Shift Test inspection in Road Test. [*1]
Click here

HINT:

[*1] : Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Stop the vehicle.
Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
Input the DTC: P08BA7F.

Check the DTC judgment result.

Techstream Display	Description
NORMAL	DTC judgment completed System normal
ABNORMAL	DTC judgment completed System abnormal
INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions
N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

HINT:

If the judgment result shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.

CAUTION / NOTICE / HINT

NOTICE:

Perform the universal trip to clear permanent DTCs.
Click here
Perform registration and/or initialization when parts related to the automatic transaxle are replaced.
Click here

PROCEDURE

1.	CHECK DTC OUTPUT (IN ADDITION TO DTC P08BA7F)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Powertrain / Transmission / Trouble Codes.

(e) Read the DTCs using the Techstream.

Result	Proceed to
DTC P08BA7F and DTC P07407E, P07457F, P07757F, P07957F, P27137F, P28167F and/or P28077F are output	A
Only DTC P08BA7F is output	B
DTCs other than P07407E, P07457F, P07757F, P07957F, P08BA7F, P27137F, P28077F and P28167F are also output	C

HINT:

If any DTCs other than P07407E, P07457F, P07757F, P07957F, P08BA7F, P27137F, P28077F and P28167F are output, perform troubleshooting for those DTCs first.
If a shift solenoid valve is stuck ON or OFF, DTCs for several shift solenoid valves including the malfunctioning shift solenoid valve will be stored.

GO TO STEP 3

GO TO DTC CHART

2.	CLEAR DTC AND PERFORM STALL SPEED TEST

(a) Clear the DTCs.

Click here

HINT:

Write down the currently output DTCs before clearing them.

(b) Perform the stall speed test.

Click here

Test Condition	Proceed to
Stall speed test can be performed	A
Stall speed test cannot be performed	B

GO TO STEP 5

3.	INSPECT SHIFT SOLENOID VALVE SL1, SL2, SL3, SL4 SL5 AND SL6

(a) Remove the shift solenoid valves SL1, SL2, SL3, SL4 SL5 and SL6.

Click here

*a	Component without harness connected (Shift Solenoid Valve SL1, SL2, SL3, SL4 SL5 and SL6)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Shift solenoid valve SL1 connector terminal 1 - terminal 2	20°C (68°F)	5.0 to 5.6 Ω
Shift solenoid valve SL2 connector terminal 1 - terminal 2	20°C (68°F)	5.0 to 5.6 Ω
Shift solenoid valve SL3 connector terminal 1 - terminal 2	20°C (68°F)	5.0 to 5.6 Ω
Shift solenoid valve SL4 connector terminal 1 - terminal 2	20°C (68°F)	5.0 to 5.6 Ω
Shift solenoid valve SL5 connector terminal 1 - terminal 2	20°C (68°F)	5.0 to 5.6 Ω
Shift solenoid valve SL5 connector terminal 1 - terminal 2	20°C (68°F)	5.0 to 5.6 Ω

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

OK:

Valve moves and makes an operating sound.

REPLACE SHIFT SOLENOID VALVE SL1, SL2, SL3, SL4 SL5 OR SL6

4.	INSPECT SHIFT SOLENOID VALVE SL

(a) Remove the shift solenoid valve SL.

Click here

*1	Shift Solenoid Valve SL

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Shift solenoid valve SL connector terminal - Shift solenoid valve SL body	20°C (68°F)	11 to 15 Ω

(c) Connect a positive (+) lead from the battery to the terminal of the solenoid valve connector, and a negative (-) lead to the solenoid body. Check that the valve moves and makes an operating sound.

OK:

Valve moves and makes an operating sound.

REPLACE SHIFT SOLENOID VALVE SL

5.	INSPECT SHIFT SOLENOID VALVE SLT

(a) Remove the shift solenoid valve SLT.

Click here

*a	Component without harness connected (Shift Solenoid Valve SLT)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Shift solenoid valve SLT connector terminal 1 - terminal 2	20°C (68°F)	5.0 to 5.6 Ω

OK:

Valve moves and makes an operating sound.

REPLACE SHIFT SOLENOID VALVE SLT

6.	INSPECT TRANSMISSION VALVE BODY ASSEMBLY

(a) Inspect the transmission valve body assembly.

Click here

OK:

There is no foreign matter on each valve and they operate smoothly.

REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY

7.	INSPECT TORQUE CONVERTER ASSEMBLY

(a) Inspect the torque converter assembly.

Click here

OK:

The torque converter assembly is normal.

REPAIR OR REPLACE TORQUE CONVERTER ASSEMBLY

8.	REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSEMBLY

(a) Repair or replace the automatic transaxle assembly.

Click here

PERFORM A/T CODE REGISTRATION