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Torque converter lock-up is controlled by the ECM based on the turbine (input) speed sensor NT, output speed sensor SP2, engine rpm, engine load, engine temperature, vehicle speed, transmission temperature, and gear to output shaft rpm (SP2). When conditions are appropriate, the ECM requests lock-up by applying control voltage to shift solenoid SLU. When SLU is turned ON, it applies pressure to the lock-up relay valve and locks the torque converter. If the ECM detects no lock-up after lock-up has been requested or if it detects lock-up when it is not requested, the ECM interprets this as a fault in the shift solenoid valve SLU or lock-up system performance. The ECM will illuminate the MIL and store the DTC. Example: There is no difference in rotation between the input side (engine speed) and output side (input turbine MONITOR STRATEGY Related DTCs P2757: Shift solenoid valve SLU/Functional check Required sensors/Components Shift solenoid valve SLU Duration OFF malfunction (A) 2 seconds OFF malfunction (B) 0.4 seconds ON malfunction 1.8 seconds MIL operation 2 driving cycles TYPICAL ENABLING CONDITIONS All The monitor will run whenever the following DTCs are not present P0717 (Turbine speed sensor circuit) P0722 (Output speed sensor circuit) P0973, P0974 (Shift solenoid valve S1 circuit) P0976, P0977 (Shift solenoid valve S2 circuit) P0761, P0979, P0980 (Shift solenoid valve S3 circuit) P0766, P0982, P0983 (Shift solenoid valve S4 circuit) P0985, P0986 (Shift solenoid valve SR circuit) AB60F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMIS... |