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 shift solenoid valve 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.
HINT:
*: 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









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










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

All





All of the following conditions are met: Condition (A) and (B)

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 C39 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 C53 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE ECM
3. 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) Apply battery voltage (12 V) to the shift solenoid valve and check that the valve moves and makes an operating noise.
OK:






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