Dtc P2808 Pressure Control Solenoid G Performance (Shift Solenoid Valve Sl4)

Transmission. Camry. Acv40 Gsv40
U660E Automatic Transaxle. Camry. Acv40 Gsv40

DESCRIPTION

MONITOR DESCRIPTION

INSPECTION PROCEDURE

CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P2808)

PERFORM ACTIVE TEST USING INTELLIGENT TESTER

INSPECT SHIFT SOLENOID VALVE SL4

INSPECT TRANSMISSION VALVE BODY ASSEMBLY

TORQUE CONVERTER CLUTCH ASSEMBLY

DTC P2808 Pressure Control Solenoid "G" Performance (Shift Solenoid Valve SL4)


DESCRIPTION

The TCM uses the vehicle speed signal to determine the actual gear position (1st, 2nd, 3rd, 4th, 5th or 6th gear).
Then the TCM compares the actual gear with the shift schedule in the TCM memory to detect shift solenoid valve and valve body mechanical problems.

DTC No.
DTC Detecting Condition
Trouble Area
P2808
The engine revs freely when 3rd or 5th gear is requested. (2-trip detection logic)
When any of the following is detected. In addition, the condition that 4th gear is engaged when 4th gear is requested occurs twice. (2-trip detection logic)
  1. When 1st gear is requested, 3rd gear is engaged.
  2. When 2nd gear is requested, 3rd gear is engaged.
  3. When 5th gear is requested, 5th gear is engaged.
  1. Shift solenoid valve SL4 (open or closed)
  2. Valve body (blocked)
  3. Automatic transaxle (clutch, brake or gear etc.)

MONITOR DESCRIPTION

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

INSPECTION PROCEDURE

1.CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P2808)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on and turn the intelligent tester on.

  1. Enter the following items: "Powertrain / ECT / DTC / Current or Pending".

  1. Read the DTCs using the intelligent tester.

    Result:

    Display (DTC output)
    		Proceed to
    Only "P2808" is output
    		A
    "P2808" and other DTCs
    		B
HINT:
If a solenoid is stuck OFF, DTCs for several solenoids including the malfunctioning solenoid will be detected.


A
Go to step 3
B


2.PERFORM ACTIVE TEST USING INTELLIGENT TESTER
NOTICE:
This test should always be performed with at least 2 people.

  1. Connect the intelligent tester to the DLC3.

  1. Start the engine and turn the intelligent tester on.

  1. Enter the following items: "Powertrain / ECT / Active Test / Control the Shift Position".

    HINT:
    While driving, the shift position can be forcibly changed with the intelligent tester.
    Comparing the shift position commanded by the Active Test with the actual shift position enables you to confirm the problem (CAMRY_ACV40 RM000000O8L02IX.html).

    Item
    		Test Details
    		Diagnostic Note
    Control the Shift Position
    		[Test Details]
    Operate the shift solenoid valve and set each shift position by yourself.
    [Others]
    1. Press "←" button: Shift up
    2. Press "→" button: Shift down
    		It is possible to check the operation of the shift solenoid valves.
    NOTICE:
    1. This test can be conducted when the vehicle is stopped.
    2. When shifting gears using the Active Test function, do not operate the accelerator pedal for 2 seconds before and after shifting gears.
    HINT:
    The shift position commanded by the TCM is shown on the "Data List / Shift Status" display on the intelligent tester.

  1. Check the vehicle speed and the gear position when the engine speed is 1,000 rpm.

    HINT:
    Because the torque converter clutch has not engaged, it may be difficult to obtain the speeds specified in 4th, 5th, and 6th gear, however a difference of speed should still be evident following each gear change.

    Standard:

    1st
    		2nd
    		3rd
    		4th
    		5th
    		6th
    8 to 12 km/h (5 to 7.5 mph)
    		15 to 19 km/h (9.3 to 11.8 mph)
    		21 to 25 km/h (13.0 to 15.5 mph)
    		31 to 35 km/h (19.3 to 21.7 mph)
    		44 to 48 km/h (27.3 to 29.8 mph)
    		52 to 56 km/h (32.3 to 34.8 mph)

  1. Compare the TCM gear shift command and the actual gear position.

    Result:

    Actuator gear position under malfunction
    		TCM gear shift command
    		Proceed to
    1st
    		2nd
    		3rd
    		4th
    		5th
    		6th
    Shift solenoid SL1
    		Stuck ON
    		1st
    		2nd
    		3rd
    		4th
    		4th
    		4th
    		A
    Stuck OFF
    		N*1
    		N*1
    		N*1
    		N*1
    		5th
    		6th
    Shift solenoid SL2
    		Stuck ON
    		4th
    		4th
    		4th
    		4th
    		5th
    		6th
    		B
    Stuck OFF
    		1st
    		2nd
    		3rd
    		1st
    		N*1
    		N*1
    Shift solenoid SL3
    		Stuck ON
    		2nd
    		2nd
    		3rd
    		4th
    		5th
    		6th
    		C
    Stuck OFF
    		1st
    		1st
    		3rd
    		4th
    		5th
    		N*1
    Shift solenoid SL4
    		Stuck ON*3
    		3rd
    		3rd
    		3rd
    		4th
    		5th
    		5th
    		D
    Stuck OFF
    		1st
    		2nd
    		1st
    		4th
    		N*1
    		6th
    Shift solenoid SLT
    		Stuck ON
    		N*2
    		N*2
    		N*2
    		N*2
    		N*2
    		N*2
    		E
    Stuck OFF*3
    		1st
    		2nd
    		3rd
    		4th
    		5th
    		6th
    HINT:
    1. *1: Neutral
    2. *2: If the shift solenoid SLT is stuck on, the line pressure will be low. Therefore, the amount of torque that can be transmitted by each gear is lower than the normal limit. When the engine power exceeds this lowered limit, the engine speed will increase freely.
    3. *3: When the shift solenoid SLT is stuck OFF, gear shifting is normal.


A
GO TO DTC CHART (RELATED SHIFT SOLENOID VALVE (SL1) PERFORMANCE DTC P0746)

B
GO TO DTC CHART (RELATED SHIFT SOLENOID VALVE (SL2) PERFORMANCE DTC P0776)

C
GO TO DTC CHART (RELATED SHIFT SOLENOID VALVE (SL3) PERFORMANCE DTC P0796)

E
GO TO DTC CHART (RELATED SHIFT SOLENOID VALVE (SLT) PERFORMANCE DTC P2714)
D


3.INSPECT SHIFT SOLENOID VALVE SL4


    Camry. Acv40 Gsv40.U660E Automatic Transaxle.Automatic Transaxle System. Dtc P2808 Pressure Control Solenoid G Performance (Shift Solenoid Valve Sl4)

  1. Remove the shift solenoid valve SL4.

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

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

  1. Connect a positive (+) lead through a 21 W bulb to terminal 2 and a negative (-) lead to terminal 1 of the solenoid valve connector, then check the movement of the valve.

    OK:
    The solenoid makes an operating noise.


NG
REPLACE SHIFT SOLENOID VALVE SL4
OK


4.INSPECT TRANSMISSION VALVE BODY ASSEMBLY
OK:
There are no foreign objects on each valve and they operate smoothly.


NG
REPLACE TRANSMISSION VALVE BODY ASSEMBLY
OK


5.TORQUE CONVERTER CLUTCH ASSEMBLY
OK:
The torque converter clutch operates normally.


NG
REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY
OK

REPLACE AUTOMATIC TRANSAXLE ASSEMBLY