LEMON Manuals: Even more car manuals for everyone
Home >> Saturn >> 2000 >> LS1 Automatic >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transaxle Diagnosis - 4T40-E & 4T45-E >> Diagnostic Tests >> DTC P0757: 2-3 Shift Solenoid Performance - No 3RD Or 4TH Gear >> Diagnostic Procedure

Diagnostic Procedure

NOTE: For connector end views and component locations, see Figure -Figure . For circuit locations, see WIRING DIAGRAMS  .
  1. Ensure on-board diagnostic system check has been performed. See ON-BOARD DIAGNOSTIC SYSTEM CHECK  under DIAGNOSIS & TESTING. Go to next step.
  2. Check transaxle fluid level. Fill if necessary. See appropriate AUTOMATIC TRANSMISSION SERVICING article in TRANSMISSION SERVICING. Go to next step.
  3. Connect scan tool to DLC. Turn ignition switch to ON position. Using scan tool, record freeze frame and failure records for reference. Clear DTC. Select snapshot mode on scan tool. Record current gear and gear ratio. Drive vehicle in "D" position to obtain 2-3 shift with throttle position angle more than 8 percent and vehicle speed more than 5 MPH for 5 seconds. If 1st/4th gear ratio is not 2.87:1-3.13:1, and 2nd/3rd gear ratio is not 1.54:1-1.71:1, see DIAGNOSTIC AIDS  . If 1st/4th gear ratio is 2.87:1-3.13:1, and 2nd/3rd gear ratio is 1.54:1-1.71:1, go to next step.
  4. Repair 2-3 shift circuit. Check 2-3 shift circuit for 2-3 shift solenoid mechanically stuck off, 2-3 shift solenoid "O" ring damage or 2-3 shift valve stuck in released (downshift) position. Repair as necessary, then go to next step.
  5. After repair is complete, select DTC on scan tool. Select CLEAR INFO function. Select SPECIFIC DTC and enter DTC "P0757". Drive vehicle in "D" position. Allow transaxle to shift through all gears. Actual gear ratios must match commanded gears for .75 seconds for all gears. If DTC P0757 is not present, repair is complete. If DTC P0757 is still present, repeat test.
scientia non olet · About LEMON Manuals