P2759

A761E AUTOMATIC TRANSMISSION: 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. The higher the duty ratio, the higher the lock-up hydraulic pressure becomes during the lock-up operation.





*: 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










1. Reference: Inspect using an oscilloscope.
Check the waveform of the ECM connector.
OK:
Refer to illustration.






MONITOR DESCRIPTION

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

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SLU)




(a) Disconnect the E1 wire connector.
(b) Measure the resistance of the transmission wire.
Standard resistance:






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




(a) Disconnect the E3 ECM connector.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE ECM
3. INSPECT SHIFT SOLENOID VALVE SLU
(a) Remove the shift solenoid valve SLU.




(b) Measure the resistance of the solenoid valve.
Standard resistance:





(c) Connect the battery's 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 operating noise.
NG -- REPLACE SHIFT SOLENOID VALVE SLU
OK -- REPAIR OR REPLACE TRANSMISSION WIRE