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TRANSMISSION CONTROL SYSTEM (4L30–E) 7A1–75 Test Description The numbers below refer to the step numbers on the 2. This test checks the function of the range switch (mode switch). 3. This test checks for selected gear ratio vs. a ratio not obtainable under normal driving conditions. DTC P0757 Shift Solenoid B Performance (Stuck ON) Step Action Yes No 1 Were you sent here from the “Powertrain On–Board Diagnostic Go to Step 2 Go to OBD System Check Refer to Driveability and Emissions in Engine section 2 1. Install the scan tool. NOTE: Before clearing DTC(s), use the scan tool to record “Freeze 3. Record the DTC “Freeze Frame” and “Failure Records”. each transmission range DL, D2, D3, D4, N, R, and P. Does each selected transmission range match the “TR Switch” on Go to Step 3 Go to “Range Switch Logic Table” 3 1. While the engine is operating, raise the drive wheels. command 1st, 2nd, and 3rd, and 4th gears while accelerating Was a 4–3–3–4 shift pattern detected? (Road testing the vehicle Go to Step 4 Go to Diagnostic Aids 4 Check the shift solenoid/hydraulic circuit for: D One or both of the shift solenoids for an internal malfunction. D Contamination or sediment in one or both of the shift D Damaged seals on the one or both of the shift solenoids. Refer to Solenoid (Main Case Valve Body) in Automatic Was a problem found and corrected? Go to Step 5 Go to Diagnostic Aids 5 1. After the repair is complete, use the scan tool to select “DTC”, then “Clear Info” function and road test the vehicle. 2. Review the scan tool “DTC Info”. Has the last test failed or is the current DTC displayed? Begin diagnosis again Go to Step 1 Repair verified |