Dtc P0778 Pressure Control Solenoid B Electrical (Shift Solenoid Valve Sl2)

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

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT TRANSMISSION WIRE (SL2)

INSPECT SHIFT SOLENOID SL2

DTC P0778 Pressure Control Solenoid "B" Electrical (Shift Solenoid Valve SL2)


DESCRIPTION

Shifting from 1st to 6th is performed in combination with "ON" and "OFF" operation of the shift solenoid valves SL1, SL2, SL3, SL4 and SL which is controlled by the TCM. 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 smoothly (CAMRY_ACV40 RM000000O8L02IX.html).

DTC No.
DTC Detection Condition
Trouble Area
P0778
The TCM checks for an open or short in the shift solenoid valve SL2 circuit while driving and shifting gears. (1-trip detection logic)
  1. Output signal duty equals to 100%.
    (NOTE: SL2 output signal duty is less than 100% under normal condition.)
  1. Open or short in shift solenoid valve SL2 circuit
  2. Shift solenoid valve SL2
  3. TCM

MONITOR DESCRIPTION

This DTC indicates an open or short in the shift solenoid valve SL2 circuit. The TCM commands gear shifts by turning the shift solenoid valves on or off. When there is an open or short circuit in any of the shift solenoid valve circuits, 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.)
While driving and shifting gears, if the TCM detects an open or short in the shift solenoid valve SL2 circuit, the TCM determines there is a malfunction (CAMRY_ACV40 RM000000O8L02IX.html).

WIRING DIAGRAM


Camry. Acv40 Gsv40.U660E Automatic Transaxle.Automatic Transaxle System. Dtc P0778 Pressure Control Solenoid B Electrical (Shift Solenoid Valve Sl2)


INSPECTION PROCEDURE


HINT:
The shift solenoid valve SL2 is turned on or off automatically when the shift lever is in the D position:

TCM command gearshift
1st
2nd
3rd
4th
5th
6th
Shift solenoid valve SL2
OFF
OFF
OFF
ON
ON
ON
1.INSPECT TRANSMISSION WIRE (SL2)


    Camry. Acv40 Gsv40.U660E Automatic Transaxle.Automatic Transaxle System. Dtc P0778 Pressure Control Solenoid B Electrical (Shift Solenoid Valve Sl2)

  1. Remove the TCM from the transaxle.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    20°C (68°F)
    9 (SL2+) - 8 (SL2-)
    		5.0 to 5.6 Ω

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

    Standard resistance:
    Check for short:
    Tester Connection
    		Specified Condition
    9 (SL2+) - Body ground
    		10 kΩ or higher
    8 (SL2-) - Body ground
    		10 kΩ or higher


OK
REPLACE TCM
NG


2.INSPECT SHIFT SOLENOID SL2


    Camry. Acv40 Gsv40.U660E Automatic Transaxle.Automatic Transaxle System. Dtc P0778 Pressure Control Solenoid B Electrical (Shift Solenoid Valve Sl2)

  1. Remove the shift solenoid valve SL2.

  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 sound.


NG
REPLACE SHIFT SOLENOID SL2
OK

REPLACE TRANSMISSION WIRE