Mitsubishi Eclipse II technical information manual page 197

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 Random Access Memory (RAM) One of the start routine checks is to verify that the data storage bits in each RAM location are function-be written to and changed, as well as read from. ing properly. RAM is a form of memory that canCode 17 is reported with a failure of RAM. Read Only Memory (ROM) A ROM check also occurs during the start routine. in the TCM and is used to store the programs needed The check is to verffy that all of the data stored to run the system. Code 16 is reported with a failure in the ROM is valid. ROM is a permanent memory of ROM. Transmission Control Relay and Driver Circuit Continuity Checks Prior to power-up, the relay contacts should notfor each solenoid. Codes 41 through 44 are reported be passing current (relay open). Code 14 is reported with a failure of any one solenoid. with a failure of the transmission control relaycon- tacts (stuck closed). After completion of the Start Routine, all of thenec- essary control logic variables are reset prior toacti- All three pressure switch inputs should be in apower- vating the main control program. Some of thevari- off condition. Code 20 is reported with a failure ables that require resetting are clutch volumetrack- of any pressure switch (switch closed, indicating pressure when none exists). ing values set to zero, initial speed values are calcu- lated, various counters and timers are cleared, and With the above checks all valid, the TCM then closes the relay and verifies that the relay contacts areshift logic selection is set to neutral. passing current. Code 15 is reported if this failsFor the first few seconds of main program execution (relay contacts never close). following start up, the pressure switch checks are not performed. This allows time for the transaxle With the transmission control relay contacts closed, the TCM then confirms the driver circuit continuityoil pump to develop pressure and purge the air from the various hydraulic circuits. Park/Neutral Position and Transmission Range Switch Logic This logic function reads the switch positions of Reverse, N = Neutral, D = Drive, 2 = Second, and the transmission range and park neutral position L = Low. There are also some transition codes that switches on the manual lever (rooster comb) to de- termine the driver-selected operating mode.occur between switch positions that are recognized by the TCM. They are Tl, T2, and T3. An I code The primary input for shift lever position to the TCM also exists as an invalid code. comes from the transmission range and park neutral These logic output codes are then used by the Shift position switches. The logic in the TCM for theseLever Position (SLP) logic in the TCM. switches reads the four bit code determined by the NOTE switch positions. When closed, each switch provides ground for the particular circuit it is in (TI, T3, T41,The scan tool (MUT-II) does not recognize the differ- ence between transition and invalid codes. A“?” T42). The status of these switches is based on shift lever, manual valve and rooster comb positionson the display screen, of the scan tool (MUT-II), which determines the logic output code. is used to represent these codes when they are present. They can occur between shift lever posi- The output signal may be any of the following, de- pending on the logic output code. P= Park, R =tions. F4ACl Transaxle Electronics

owners manual Mitsubishi Eclipse

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