DTC    P2716/77    Pressure Control Solenoid "D" Electrical (Shift Solenoid Valve SLT)

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DESCRIPTION

D002290E04
The throttle pressure that is applied to the primary regulator valve (which modulates the line pressure) causes the solenoid valve SLT, under electronic control, to precisely modulate and generate the line pressure according to the extent that the accelerator pedal is depressed or the output of engine power.
This controls the line pressure and provides smooth shifting characteristics.
Upon receiving a signal of the throttle valve opening angle, the ECM controls the line pressure by sending a predetermined duty ratio* to the solenoid valve, modulating the line pressure and generating throttle pressure.

HINT:
BE04056E05
*: The duty ratio is the ratio of the current ON time (A) to the total of the current ON and OFF time (A + B).
Duty Ratio (%) = A / (A + B) x 100

DTC No.
DTC Detection Condition
Trouble Area
P2716/77
ECM detects shift solenoid valve SLT circuit malfunction for 1 sec. or more (1 trip detection logic)
  1. Open or short in shift solenoid valve SLT circuit
  2. Shift solenoid valve SLT
  3. ECM

WIRING DIAGRAM


C119177E01


INSPECTION PROCEDURE

1.INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SLT)


    G022892E02

  1. Disconnect the E1 wire connector.

  1. Measure the resistance of the transmission wire.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2 (SLT+) - 6 (SLT-)
    		20°C (68°F)
    		5.0 to 5.6 Ω
    2 (SLT+) - Body ground
    		20°C (68°F)
    		10 kΩ or higher
    6 (SLT-) - Body ground
    		20°C (68°F)
    		10 kΩ or higher


NG
Go to step 3
OK


2.CHECK WIRE HARNESS (TRANSMISSION WIRE - ECM)


    C117621E04

  1. Disconnect the E10 ECM connector.

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E10-12 (SLT+) - E10-13 (SLT-)
    		20°C (68°F)
    		5.0 to 5.6 Ω
    E10-12 (SLT+) - Body ground
    		20°C (68°F)
    		10 kΩ or higher
    E10-13 (SLT-) - Body ground
    		20°C (68°F)
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE ECM 

3.INSPECT SHIFT SOLENOID VALVE SLT
G020767E25

  1. Remove the shift solenoid valve SLT.

  1. Measure the resistance between the solenoid valve terminal and solenoid valve body.

    Standard resistance:
    5.0 to 5.6 Ωat 20°C (68°F)

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



  1. Check the operating noise of terminal 1 of the solenoid valve.

    OK:
    Solenoid makes operating noise.

    HINT:
    C125003E01
    Reference: Inspect using an oscilloscope.
    Check the waveform of the ECM connector.

    OK:
    Refer to illustration
    Item
    		Content
    Tester Connection
    		E10-12 (SLT+) - E10-13 (SLT-)
    Tool Setting
    		5 V/DIV., 1 msec./DIV.
    Condition
    		Engine idle speed


NG
REPLACE SHIFT SOLENOID VALVE SLT
OK

REPAIR OR REPLACE TRANSMISSION WIRE