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

## for Preparation Click here

## DESCRIPTION

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 TCM controls the line pressure by sending a predetermined duty ratio* to the solenoid valve, modulating the line pressure and generating throttle pressure.

HINT:

  *: 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

TCM 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. TCM

## WIRING DIAGRAM

## INSPECTION PROCEDURE

1.INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SLT)

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 (SHIFT SOLENOID VALVE SLT - TCM)

1. Disconnect the T19 TCM connector.

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

   Standard resistance:

     Tester Connection | Condition | Specified Condition
     T19-20 (SLT+) - T19-19 (SLT-) | 20°C (68°F) | 5.0 to 5.6 Ω
     T19-20 (SLT+) - Body ground | 20°C (68°F) | 10 kΩ or higher
     T19-19 (SLT-) - Body ground | 20°C (68°F) | 10 kΩ or higher

| NG |

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK |

REPLACE TCM

3.INSPECT SHIFT SOLENOID VALVE SLT

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 battery's positive (+) lead to the terminal of the solenoid connector, and the negative (-) lead to the solenoid body.

   OK:
     Solenoid makes operating noise.

   HINT:

     Reference: Inspection using an oscilloscope.
     Check the waveform of the TCM connector.

   Standard voltage:
     Refer to illustration.:

     Item | Content
     Tester Connection | T19-20 (SLT+) - T19-19 (SLT-)
     Tool Setting | 5 V/DIV., 1 msec./DIV.
     Condition | Engine idle speed

| NG |

REPLACE SHIFT SOLENOID VALVE SLT

OK |

REPLACE TRANSMISSION WIRE