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7A1–70 TRANSMISSION CONTROL SYSTEM (4L30–E) Diagnostic Aids D Inspect the wiring for poor electrical connection at the D When diagnosing for a possible intermittent short or Test Description The numbers below refer to the step numbers on the solenoid from the ignition through the PCM. 3. This test checks the resistance of the transmission internal wiring harness and brake band apply 4. This test checks the ability of the PCM and wiring to control the ground circuit. DTC P1850 Brake Band Apply Solenoid Malfunction 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”. Were DTCs P0753, P0758 set? Go to Step 2 Go to Step 3 2 Using the J39200 DVOM, back probe between PCM connector Is the voltage between 10 to 12 volts? Go to Step 4 Go to Step 5 3 1. Turn the ignition “off”. PCM connector terminals J1–A16 and J3–E14. Is the resistance within 10–12 ohms? Go to Step 11 Go to Step 12 4 Using the J39200 DVOM, back probe between PCM connector Is the voltage between 10 to 12 volts? Go to Step 25 Go to Step 3 5 1. Turn the ignition “off”. terminal J3–E14 and ground. Is there a continuity? Go to Step 6 Go to Step 8 6 1. Disconnect the transmission 16–way connector H–53. H53–13 and ground. Is there a continuity? Go to Step 7 Go to Step 16 7 1. Disconnect the transmission main case connector M–7. terminal M7–2(B) and ground. Is there a continuity? Go to Step 17 Go to Step 18 8 1. Disconnect the J1 (RED) PCM Connector. PCM connector terminals J1–A16 and J3–E14. Is the resistance within 10–12 ohms? Go to Step 25 Go to Step 9 9 1. Disconnect the transmission 16–way connector H–53. terminal H53–13 and H53–15. Is the resistance within 10–12 ohms? Go to Step 16 Go to Step 10 |