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P0876-UD PRESSURE SWITCH RATIONALITY (CONTINUED) 6. CHECK IF DTC EVENT DATA WAS SET IN PARK, NEUTRAL OR REVERSE Refer to the DTC EVENT DATA recorded earlier. Did the DTC P0876 set in Park, Neutral, or Reverse? Yes >> Go To 10 No >> Go To 7 7. CHECK FOR UD PRESSURE SWITCH STATUS Refer to the DTC EVENT DATA recorded earlier. Did the DTC P0876 set with the UD Pressure Switch closed? Yes >> Go To 10 No >> Go To 8 8. CHECK LINE PRESSURE In the EATX DTC EVENT DATA recorded earlier, compare the Line Pressure and the Desired Line Pressure. 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 fluid level and adjust as necessary. If fluid level is OK, check the Primary Oil Filter seal for a split, crack, or improperly installed. If the filter and seal are Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. No >> Go To 9 9. (T29) UD PRESSURE SWITCH SENSE CIRCUIT SHORT TO OTHER CIRCUITS Turn the ignition off to the lock position. Disconnect all PCM harness connectors. Disconnect the Transmission Solenoid/TRS Assembly harness connec- Measure the resistance between the (T29) UD Pressure Switch Sense Is the resistance below 5.0 ohms between the (T29) UD Pres- Yes >> Repair the (T29) UD Pressure Switch Sense circuit for a short to other circuit(s). Perform 45RFE/545RFE TRANSMISSION VERIFICATION No >> Replace the Transmission Solenoid/TRS Assembly per the Service Information. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. 21 - 580 AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS ND |