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Home >> Saturn >> 2000 >> SL2 Automatic, MP6 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Overhaul - Mp6 & Mp7 >> Performance Tests >> Actuator Quick Check

Actuator Quick Check

  1. Check level and condition of transaxle fluid. Check PCM memory for any stored DTCs. See SATURN MP6 & MP7 ELECTRONIC CONTROLS article. If no DTCs are present, go to next step. If DTCs are present, diagnose and repair all engine performance-related DTCs first. Clear PCM memory.
  2. If no DTCs are present, road test vehicle. See ROAD TEST  . During road test, record shift points. If shift point timing is incorrect or incorrect shifting occurs, check transaxle electronic control system. See SATURN MP6 & MP7 ELECTRONIC CONTROLS article.
  3. Using scan tool, ensure all gear selector switch (PRND32) positions are correct. Using scan tool, run actuator SPECIAL TEST.
  4. With ignition on, engine off, move gear selector to each gear position. This should cause a specific line actuator to operate. See LINE ACTUATOR SELECT  table.
  5. If line actuator is operating, it will audibly operate at a fixed duty cycle for 6 seconds, and then click on and off. Clicking will repeat until next gear is selected or ignition is turned off.
  6. If shifts are too harsh/soft, check hydraulic pressures. See HYDRAULIC PRESSURE TESTS  . For specific complaints, see conditions listed in SYMPTOM DIAGNOSIS  under TROUBLE SHOOTING.
LINE ACTUATOR SELECT

Selected Gear Actuator
"2" 2nd
"3" 3rd
"D" 4th
"R" TCC
"N" Or "P" Line