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The ECM calculates the "actual" transmission gear by comparing the signals from the input speed sensor (NT) and the output speed sensor (SP2). The ECM can detect many mechanical problems in the shift solenoids, valve body, transmission clutches, brakes, and gears. If the ECM detects that the actual gear position and the commanded gear position are different, it will illuminate the MIL and store the DTC. MONITOR STRATEGY Related DTCs P0781: Valve body/Functional check Required sensors/Components Valve body, Automatic transmission assembly Duration Condition (A) and (B) 0.4 seconds Condition (C) 3 seconds Condition (D) 1 second 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) P0979, P0980 (Shift solenoid valve S3 circuit) P0982, P0983 (Shift solenoid valve S4 circuit) P0985, P0986 (Shift solenoid valve SR circuit) P0748 (Shift solenoid valve SL1 circuit) P0778 (Shift solenoid valve SL2 circuit) P0115, P0116, P0117, P0118, P011B (ECT (Engine coolant temperature) sensor circuit) P0327, P0328, P032C, P032D, P0332, P0333, P033C, P033D (KCS sensor circuit) ETCS (Electric Throttle Control System) Not system down Transmission position "D" Duration time from shifting "N" to "D" 4 seconds or more ECT 40°C (104°F) or higher Spark advance from max. retard timing by KCS control 0° crankshaft angle or more Engine Starting Condition (A) AB60E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMIS... |