P2716

A750E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: P2716: Pressure Control Solenoid "D" Electrical (Shift Solenoid Valve SLT)

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

DESCRIPTION





The linear solenoid valve (SLT) controls the transmission line pressure for smooth transmission operation based on signals from the throttle position sensor and the vehicle speed sensor. The ECM adjusts the duty ratio* of the SLT solenoid valve output signal to control the hydraulic line pressure coming from the primary regulator valve. Appropriate line pressure assures smooth shifting with varying engine outputs.
*: The duty ratio is the ratio of the continuity to non-continuity in one cycle.
For example, if A is the period of continuity in one cycle, and B is the period of non-continuity, then Duty Ratio=A/(A+B) x 100 (%)






MONITOR DESCRIPTION

When an open or short is detected in the linear solenoid valve (SLT) circuit, the ECM interprets this as a fault.
The ECM turns on the MIL and stores the DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

The following conditions are common to Condition (A) and (B).






Condition (A)





Condition (B)





TYPICAL MALFUNCTION THRESHOLDS

Either of the following conditions is met: Condition (A) or (B).

Condition (A)





Condition (B)





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT TRANSMISSION WIRE (SLT)




(a) Disconnect the transmission wire connector from the transmission.
(b) Measure the resistance.
Standard resistance:





(c) Measure the resistance.
Standard resistance (Check for short):






NG -- INSPECT SHIFT SOLENOID VALVE SLT
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)




(a) Connect the transmission wire connector to the transmission.
(b) Disconnect the ECM connector.
(c) Measure the resistance.
Standard resistance:





(d) Measure the resistance.
Standard resistance (Check for short):






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE ECM
3. INSPECT SHIFT SOLENOID VALVE SLT




(a) Remove the shift solenoid valve SLT.
(b) Measure the resistance.
Standard resistance:





(c) 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.
OK:
The solenoid makes operating sounds.
NG -- REPLACE SHIFT SOLENOID VALVE SLT
OK -- REPAIR OR REPLACE TRANSMISSION WIRE