Automatic Transmission - U760E

U760E AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSAXLE SYSTEM: P2759: Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve SLU)
P2759 - Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve SLU)

DESCRIPTION

The amount of current flow to the solenoid is controlled by the duty ratio* of the TCM output signal. The higher the duty ratio becomes, the higher the lock-up hydraulic pressure becomes during the lock-up operation.





*: Duty Ratio

The duty ratio is the ratio of the electrical current on time (A) to the total of the electrical current on and off time (A + B).

Duty Ratio (%) = (A / (A + B)) x 100





MONITOR DESCRIPTION

When an open or short in a shift solenoid valve (SLU) circuit is detected, the TCM determines there is a malfunction. The TCM will turn on the MIL and store this DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

All

All:

Condition (A)

Condition (A):

Condition (B)

Condition (B):

Condition (C)

Condition (C):

TYPICAL MALFUNCTION THRESHOLDS

When one of the following conditions is met: Condition (A), (B) or (C)

Condition (A) and (B)

Condition (A) and (B):

Condition (C)

Condition (C):

COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
Perform the universal trip to clear permanent DTCs .

PROCEDURE

1. INSPECT TRANSMISSION WIRE (SLU)

(a) Remove the TCM from the transaxle.





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

Standard Resistance:





Result:





B -- REPLACE TCM
A -- Continue to next step.

2. INSPECT SHIFT SOLENOID VALVE SLU

(a) Remove shift solenoid valve SLU.





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

Standard Resistance:





(c) Connect a battery positive (+) lead with a 21 W bulb to terminal 2 and a negative (-) lead to terminal 1 of the solenoid valve connector. Then check that the valve moves and makes an operating sound.

OK:

Valve moves and makes an operating sound.

Text in Illustration

Text in Illustration:

NG -- REPLACE SHIFT SOLENOID VALVE SLU

OK -- REPLACE TRANSMISSION WIRE