P2759

AB60F AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSMISSION SYSTEM: P2759: Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve SLU)

DTC 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 ECM output signal. During the lock-up operation, if the duty ratio increases, the lock-up hydraulic pressure increases.





*: 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





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





Standard:
Refer to the illustration.





MONITOR DESCRIPTION

When an open or short in a shift solenoid valve SLU circuit is detected, the ECM determines that there is a malfunction. The ECM will illuminate the MIL and store the DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

All





Condition (A)





Condition (B)





TYPICAL MALFUNCTION THRESHOLDS

When either condition below is met: Condition (A) or (B)

Condition (A)





Condition (B)





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT NO. 1 TRANSMISSION WIRE (SHIFT SOLENOID VALVE SLU)





(a) Disconnect the D41 No. 1 transmission wire connector.
(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- INSPECT SHIFT SOLENOID VALVE SLU
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (NO. 1 TRANSMISSION WIRE - ECM)





(a) Disconnect the D56 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Result





C -- REPLACE ECM
B -- REPLACE ECM
A -- REPAIR OR REPLACE HARNESS OR CONNECTOR
3. INSPECT SHIFT SOLENOID VALVE SLU
(a) Remove the shift solenoid valve SLU.





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

Standard Resistance:





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

NG -- REPLACE SHIFT SOLENOID VALVE SLU
OK -- REPAIR OR REPLACE NO. 1 TRANSMISSION WIRE