- DTC judgment completed
- System normal
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM10000000101MB |
| Model Year Start: 2017 | Model: Sienna | Prod Date Range: [08/2016 - 11/2017] |
| Title: UA80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: P28077F; Pressure Control Solenoid "G" Actuator Stuck Off; 2017 MY Sienna [08/2016 - 11/2017] | ||
|
DTC |
P28077F |
Pressure Control Solenoid "G" 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 malfunction of the shift solenoid valves, transmission valve body assembly and automatic transaxle assembly (clutch, brake, gear, etc.).
Actual gear when shift solenoid valve SL4 (without fail-safe control) malfunction occurs:
|
ECM commanded gear |
1st |
2nd |
3rd |
4th |
5th |
6th |
7th |
8th |
|---|---|---|---|---|---|---|---|---|
| *: Neutral | ||||||||
|
Actual gear during SL4 stuck ON malfunction |
4th |
4th |
3rd |
4th |
4th to 5th |
6th |
7th |
6th |
|
Actual gear during SL4 stuck OFF malfunction |
1st |
2nd |
3rd |
N* |
5th |
N* |
7th |
8th |
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Memory |
Note |
|---|---|---|---|---|---|---|
|
P28077F |
Pressure Control Solenoid "G" Actuator Stuck Off |
1. Diagnosis Condition, 2. Malfunction Status, 3. Malfunction Time, 4. Other SL4 stuck ON malfunction:
SL4 stuck OFF malfunction:
|
|
Comes on |
DTC stored |
SAE Code: P2808 |
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 |
P2808: Shift solenoid valve SL4/OFF malfunction Shift solenoid valve SL4/ON malfunction |
|
Required sensors/Components |
Shift solenoid valve SL4 |
|
Frequency of operation |
Continuous |
|
Duration |
OFF malfunction: 0.5 sec. ON malfunction: 0.8 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) P0712, P0713 (ATF temperature sensor circuit (TFT sensor)) P0335, P0337, P0338 (Crankshaft Position Sensor circuit) 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 |
Not OFF or ON malfunction (P0746) |
|
Shift solenoid valve SL2 |
Not OFF or ON malfunction (P0776) |
|
Shift solenoid valve SL3 |
Not OFF or ON malfunction (P0796) |
|
Shift solenoid valve SL4 |
Not OFF or ON malfunction (P2808) |
|
Shift solenoid valve SL5 |
Not OFF or ON malfunction (P2817) |
|
Shift solenoid valve SL6 |
Not OFF or ON malfunction (P08BB) |
|
Shift solenoid valve SLT |
Not OFF malfunction (P2714) |
|
Shift solenoid valve SLU |
Not ON malfunction (P2757) |
|
Shift solenoid valve SL |
Not ON malfunction (P0741) |
|
All shift solenoids |
Not being halted |
|
Neutral command flag |
Not met |
OFF malfunction (A)
|
ECM selected gear |
6th |
|
First neutral state detection is fixed in 4th gear |
- |
|
Vehicle stop check |
Fixed |
|
ECM selected gear |
4th |
|
First neutral state detection is fixed in 6th gear |
- |
|
Vehicle stop check |
Fixed |
|
Calculated load value |
|
|
When A/C off |
16% or more |
|
When A/C on |
19% or more |
|
Throttle valve opening angle |
3% or more |
OFF malfunction (B)
|
Following conditions met |
a. or b. |
|
a. ECM selected gear |
4th |
|
Turbine speed - Output speed x 3rd gear ratio Output speed x 5th gear ratio |
50 rpm or more and 6500 rpm or less |
|
b. ECM selected gear |
6th |
|
Turbine speed - Output speed x 4th gear ratio (Output speed x 5th gear ratio) |
50 rpm or more and 6500 rpm or less |
OFF malfunction (C)
|
ECM selected gear |
5th |
|
Turbine speed / Output speed (NT/NO) |
1.1 or more and 1.3 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) |
|
Vehicle speed |
2 km/h (1.2 mph) or more |
|
Throttle valve opening angle |
5% or more at engine speed 2000 rpm (Condition varies with engine speed) |
|
Calculated load value |
|
|
When A/C off |
16% or more |
|
When A/C on |
19% or more |
ON malfunction (A)
|
ECM selected gear |
1st |
|
Vehicle speed |
2 km/h (1.2 mph) or more and less than 38 km/h (23.6 mph) |
|
Throttle valve opening angle |
5% or more at engine speed 2000 rpm (conditions vary with engine speed) |
|
Calculated load value |
- |
|
When A/C off |
16% or more |
|
When A/C on |
19% or more |
|
ECT |
40°C (104°F) or more |
|
Spark advance from MAX. retard timing by KCS control |
0 °CA or more |
ON malfunction (B)
|
ECM selected gear |
2nd |
|
Vehicle speed |
2 km/h (1.2 mph) or more |
|
Throttle valve opening angle |
5% or more at engine speed 2000 rpm (conditions vary with engine speed) |
|
Calculated load value |
- |
|
When A/C off |
16% or more |
|
When A/C on |
19% or more |
|
ECT |
40°C (104°F) or more |
|
Spark advance from MAX. retard timing by KCS control |
0 °CA or more |
ON malfunction (C)
|
ECM selected gear |
8th |
|
Vehicle speed |
2 km/h (1.2 mph) or more |
|
Throttle valve opening angle |
5% or more at engine speed 2000 rpm (conditions vary with engine speed) |
|
Calculated load value |
- |
|
When A/C off |
16% or more |
|
When A/C on |
19% or more |
|
ECT |
40°C (104°F) or more |
|
Spark advance from MAX. retard timing by KCS control |
0 °CA or more |
ON malfunction (D)
|
Turbine speed |
7000 rpm or more |
|
Following conditions met |
a. or b. |
|
a. ECM selected gear |
6th, 7th or 8th |
|
Output speed x 5th gear ratio |
7000 rpm or more |
|
b. ECM selected gear |
4th or 5th |
|
Output speed x 3rd gear ratio |
7000 rpm or more |
TYPICAL MALFUNCTION THRESHOLDS
OFF malfunction
-
When either conditions below is met: OFF malfunction (A) or (B)
OFF malfunction (A)
Turbine speed - Output speed x (ECM selected gear)
1000 rpm or more
OFF malfunction (B)
Shift solenoid valve SLT
ON malfunction
Following condition met
a. or b.
a. ECM selected gear
4th
4th gear pass detection
Not fixed after transition to latest gear
b. ECM selected gear
6th
6th gear pass detection
Not fixed after transition to latest gear
ON malfunction
-
When either conditions below is met: OFF malfunction (A), (B), (C), (D ) or (E)
ON malfunction (A)
When either condition below is met:
(a) or (b)
(a) Turbine speed/Output speed (NT/NO)
4.682 or more and 9.515 or less
(When Output speed less than 50 rpm)
(b) Turbine speed - Output speed x 4th gear ratio
-50 rpm or more and 50 rpm or less
(When Output speed 50 rpm or more)
ON malfunction (B)
When either condition below is met:
(a) or (b)
(a) Turbine speed/Output speed (NT/NO)
2.9 or more and 3.467 or less
(When Output speed less than 180 rpm)
(b) Turbine speed - Output speed x 4th gear ratio
-50 rpm or more and 50 rpm or less
(When Output speed 180 rpm or more)
ON malfunction (C)
When either condition below is met:
(a) or (b)
(a) Turbine speed/Output speed (NT/NO)
0.621 or more and 0.725 or less
(When Output speed less than 950 rpm)
(b) Turbine speed - Output speed x 6th gear ratio
-50 rpm or more and 50 rpm or less
(When Output speed 950 rpm or more)
ON malfunction (D)
Shift solenoid valve SLT
ON malfunction
Following conditions met
a. or b.
a. ECM selected gear
5th
5th 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
ON malfunction (E)
Engine speed
7000 rpm or more
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
![2017 - 2020 MY Sienna [08/2016 - ]; UA80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
- 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: P28077F.
-
Check the DTC judgment result.
Techstream Display
Description
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 P28077F) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Transmission / Trouble Codes.
(e) Read the DTCs using the Techstream.
|
Result |
Proceed to |
|---|---|
|
DTC P28077F and P07457F, P07407E, P07757F, P07957F, P08BA7F, P27137F and/or P28167F are output |
A |
|
Only DTC P28077F is output |
B |
|
DTCs other than P07457F, P07407E, P07757F, P07957F, P08BA7F, P27137F, P28077F and P28167F are also output |
C |
HINT:
- If any DTCs other than P07457F, P07407E, 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.
| B |
|
| C |
|
|
|
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 |
| B |
|
|
|
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
|
|
(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 SL6 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.
| NG |
|
|
|
4. |
INSPECT SHIFT SOLENOID VALVE SL |
|
(a) Remove the shift solenoid valve SL. Click here
|
|
(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.
| NG |
|
|
|
5. |
INSPECT SHIFT SOLENOID VALVE SLT |
|
(a) Remove the shift solenoid valve SLT. Click here
|
|
(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 |
(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.
| NG |
|
|
|
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.
| NG |
|
|
|
7. |
INSPECT TORQUE CONVERTER ASSEMBLY |
(a) Inspect the torque converter assembly.
Click here
OK:
The torque converter assembly is normal.
| NG |
|
|
|
8. |
REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSEMBLY |
(a) Repair or replace the automatic transaxle assembly.
Click here
| NEXT |
|
|
|