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P0841-LR PRESSURE SWITCH RATIONALITY (CONTINUED) 14. LOW 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 for low fluid level. Check the Primary Oil Filter seal for a split, crack, or improperly installed. Refer to the Service Information for the proper installation Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. No >> Go To 15 15. (T50) LR PRESSURE SWITCH SENSE CIRCUIT SHORT TO OTHER CIRCUITS Turn the ignition off to the lock position. Disconnect the Transmission Solenoid/TRS Assembly harness connec- Disconnect all PCM harness connectors. Measure the resistance between the (T50) LR Pressure Switch Sense Is the resistance below 5.0 ohms between the (T50) LR Pres- Yes >> Repair the (T50) LR Pressure Switch Sense circuit for a short to other circuit(s). Perform 45RFE/545RFE TRANSMISSION VERIFICATION No >> Go To 16 16. ROAD TEST THE VEHICLE With the scan tool, clear the DTC and road test the vehicle. Try to duplicate the conditions in which the DTC originally set using the EATX DTC EVENT DATA recorded earlier. Did the DTC P0841 reset? Yes >> Replace the Transmission Solenoid/TRS Assembly per the Service Information. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. No >> Go To 17 21 - 400 AUTOMATIC TRANSMISSION - 545RFE - ELECTRICAL DIAGNOSTICS DR/DH |