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P0871-OD PRESSURE SWITCH RATIONALITY (CONTINUED) 8. CHECK IF IN PARK, NEUTRAL, OR REVERSE Ignition on, engine not running. With the scan tool, read and record the EATX DTC EVENT DATA for P0871. NOTE: Make sure to record all EATX DTC EVENT DATA stored in the scan tool for future reference in this Does the EATX DTC EVENT DATA show the OD Pressure Switch DTC set while in Park, Neutral, or Yes >> Go To 18 No >> Go To 9 9. OD PRESSURE SWITCH OPEN Refer to the EATX DTC EVENT DATA recorded earlier for P0871. Did the OD Pressure Switch read OPEN? Yes >> Go To 10 No >> Go To 15 10. LOW LINE PRESSURE Refer to the EATX DTC EVENT DATA recorded earlier and compare the Line Pressure and the Desired Line Pres- Is the Line Pressure less than 40 psi, and significantly below the Desired Line Pressure? Yes >> Repair as necessary to correct low line pressure. Check the fluid level. Check the Primary Oil Filter seal for a split, crack, or improperly installed. Refer to the Service Information for the proper installation pro- Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. No >> Go To 11 11. (T9) OD PRESSURE SWITCH SENSE CIRCUIT SHORT TO ANOTHER CIRCUIT Turn the ignition off to the lock position. Disconnect all PCM harness connectors. Disconnect the Transmission Solenoid/TRS Assembly harness connec- NOTE: Check connectors - Clean/repair as necessary. Is the resistance below 5.0 ohms between the (T9) OD Pressure Yes >> Repair the (T9) OD Pressure Switch Sense circuit for a short to another circuit(s). Perform 45RFE/545RFE TRANSMISSION VERIFICATION No >> Go To 12 21 - 564 AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS ND |