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TRANSMISSION CONTROL SYSTEM (4L30–E) 7A1–57 DTC P0748 Pressure Control Solenoid (PCS) (Force Motor) Circuit Electrical Step Action Yes No 1 1. Install the scan tool. NOTE: Before clearing DTC(s), use the scan tool to record “Failure 3. Record the DTC “Failure Records”. observing “PC Ref. Current” and “PC Act. Current”. Is the “PC Act. Current” reading always within 0.16 amp? Go to Diagnostic Aids Go to Step 2 2 1. Turn the ignition “off”. terminals M6–2(B) and M6–1(E). Is the resistance within 3–7 ohms? Go to Step 6 Go to Step 3 3 1. Remove the transmission oil pan. Refer to Solenoid (Adapter Case Valve Body) in Automatic Transmission (4L30–E) 2. Disconnect the internal wiring harness at the PCS. Is the resistance within 3–7 ohms? Go to Step 5 Go to Step 4 4 Replace the PCS. Is the replacement complete? Go to Step 9 — 5 Repair the internal wiring harness for an open. Is the repair complete? Go to Step 9 — 6 Inspect/repair circuits J3–E4, M6–2(B), J3–E3, and M6–1(E). Was a problem found? Go to Step 9 Go to Step 7 7 Inspect/repair circuits J3–E4, M6–2(B), J3–E3, and M6–1(E) for Was a problem found? Go to Step 9 Go to Step 8 8 Replace the PCM. Refer to Powertrain Control Module (PCM) in Is the replacement complete? Go to Step 9 — 9 1. After the repair is complete, use the scan tool to select “DTC”, then “Clear Info” function and ensure the following conditions 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 |