U341E Automatic Transmission / Transaxle

U341E AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSAXLE SYSTEM: P2716: Pressure Control Solenoid "D" Electrical (Shift Solenoid Valve SLT)
P2716 - Pressure Control Solenoid "D" Electrical (Shift Solenoid Valve SLT)

DESCRIPTION

The shift 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 cycle of the shift solenoid valve SLT to control hydraulic line pressure coming from the primary regulator valve. Appropriate line pressure assures smooth shifting with varying engine outputs.

(*): Duty Ratio

The duty ratio is the ratio of the period of 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 in the shift solenoid valve SLT circuit is detected, the ECM interprets this as a fault. The ECM will turn on the MIL and store the DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT TRANSMISSION WIRE (SLT)

(a) Disconnect the transmission wire connector from the transaxle.





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

Standard resistance:





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

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 transaxle.





(b) Disconnect the ECM connectors.

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

Standard resistance:





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

Standard resistance (Check for short):





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE ECM (for 2ZR-FE) Removal

3. INSPECT SHIFT SOLENOID VALVE SLT

(a) Remove the shift solenoid valve SLT.





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

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 an operating sound.

NG -- REPLACE SHIFT SOLENOID VALVE SLT Disassembly

OK -- REPAIR OR REPLACE TRANSMISSION WIRE Removal