AA80E Automatic Transmission

AA80E 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 TCM controls the lock-up solenoid using a predetermined duty ratio*, and performs lock-up and flex lock-up control.
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









MONITOR DESCRIPTION

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

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

All





Condition (A)





Condition (B)





Condition (C)





TYPICAL MALFUNCTION THRESHOLDS

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

Condition (A) and (B)





Condition (C)





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND TRANSMISSION WIRE (TRANSMISSION WIRE - TCM, TRANSMISSION WIRE (SHIFT SOLENOID VALVE SLU))





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






NG -- CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM)
OK -- Continue to next step.
2. REPLACE TCM
(a) Replace the TCM Removal.
NEXT -- PERFORM A/T CODE REGISTRATION
3. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM)





(a) Disconnect the transmission wire connector.
(b) Disconnect the TCM connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. INSPECT SHIFT SOLENOID VALVE SLU





(a) Remove the shift solenoid valve SLU Disassembly.
(b) Measure the resistance of the shift 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 sound.
OK:
Valve moves and makes operating sound.
NG -- REPLACE SHIFT SOLENOID VALVE SLU
OK -- REPAIR OR REPLACE TRANSMISSION WIRE