Mitsubishi Eclipse II technical information manual page 200

text version of content this owner's manual page from owners manual to the vehicle Mitsubishi Eclipse, year of production 1995 - 1999:

POWER TRAIN- Automatic Transaxle Inhibits and Shift Action Summary For neutral (N) and reverse (R) there are no logic body identifications are retained in theTCM’s Linhibits placed on SLP changes into or out of eithermemory to ensure that the correct schedule is used if the CCD bus fails. neutral or reverse. These gear ranges are shift lever There are four different shift schedules within each controlled modes of operation. Neutral and reverse must be immediately provided for. Also, a reverseengine set. They are selected primarily by the Shift block function is used at speeds over approximatelyLever Position input code and the transaxle operat- 10 - 15 mph by continuously venting the Low/Re-ing temperature range that is calculated. Separate verse (L/R) clutch. TheL/R clutch is also vented shift schedules exist for the following; Shift Lever Position = D, Shift Lever Position = D (supercold at speeds over 8 mph in neutral. temperature range), and Shift Lever Position = L. For drive (D), Second (2) or low (L), when speed ratio or pressure switch errors occur during transaxleA typical set of shift schedules have been plotted use, the TCM will maintain the current gear rangeout in graph form. These have been modified ‘for clarity. The shift schedules primarily use throttle to prevent potentially hazardous gear selection. angle and output shaft speed as the determining A separate set of shift schedules exist for each engine/transaxle application. The TCM knows whichfactors. The main difference between these sched- set of shift schedules to use by looking at the PCMules are as follows: identiftcation over the CCD bus. The engine and SLP = “D” Cold, Warm or Hot The “D” schedule provides first, second, third andcause earlier 4-3 downshifts when the transaxle fourth gears. This shift schedule is selected whentemperature range is cold. Throttle input is also limited to prevent high engine speeds with a cold SLP = “D” and the transaxle calculated temperature range is cold, warm or hot. It should be noted thatengine. the “D” schedule will delay the 3-4 upshift, and will I SLP = “D” (Supercold and Extreme Temperature Range) LThe supercold “D” schedule is a revised D schedule.If the calculated transaxle temperature at start-up It is selected whenever the initial calculated trans-is in the extreme cold range of - 15 degrees F. axle temperature is less than 0 degrees F. Thisor less, all the solenoids will be held off. Also, the pressure switch and speed sensor checks will ,be revised schedule prevents closely spaced shifts and part throttle kickdowns. This results in delayed (high-disabled. This action provides the same mode of er speed) upshifts, earlier closed throttle downshifts,operation as with limp-in or default (second gear and in most cases the inability to obtain either 4-2operation only, in any forward gear range selection). This is done to prevent clutch damage and inadver- or 3-1 kickdowns. The primary reason is to allow tent shutdowns by delaying all TCM operation until more time for clutch pressures to achieve their nor- supercold conditions can be met. mal in-gear condition after a shift. This should hap- pen before the next shift occurs to avoid clutch overlap (two clutches applied at the same time). SLP = L per level engine RPM to protect the engine from The L schedule also has 1-2 and 2-3 shifts but over-speed. Downshifts also occur at higher vehicle they are much more delayed. The determining factor speeds. This is done to provide the highest gear for this schedule is that engine speed is monitored ratio for maximum engine braking when descending and shifts occur at peak engine RPM. Even though the driver has selected the low position, the shiftsteep grades. schedule is designed to upshift the transaxle atup-

owners manual Mitsubishi Eclipse

owners manual Mitsubishi Eclipse - year of production: 1995, 1996, 1997, 1998, 1999 - Mitsubishi Eclipse II technical information manual EN