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2. DTC DATA SHOW CURRENT DTC With the scan tool, check the DTC EVENT DATA. Does the DTC EVENT DATA show data for DTC P0988? Yes >> Go To 3 No >> Refer to the Transmission category and perform the appropriate symptom shown in the DTC EVENT DATA. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMIS- 3. MULTIPLE DTCS PRESENT With the scan tool, check for other transmission DTC’s. Are there two or more related Pressure Switch Sense DTCs present in addition to P0988? Yes >> Go To 4 No >> Go To 7 4. RELATED DTC PRESENT With the scan tool, check the DTC EVENT DATA for P0988. NOTE: Make sure to record all DTC EVENT DATA stored in the scan tool for future reference in this test Do all the pressure switches read CLOSED in the DTC EVENT DATA for P0988? Yes >> Refer to Transmission category and perform diagnostics for the DTC P0888. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMIS- No >> Go To 5 5. DTC EVENT DATA READ OPEN In the DTC EVENT DATA recorded earlier, read the state of all pressure switches. Do all the pressure switches read OPEN? Yes >> Go To 6 No >> Go To 7 6. LOW LINE PRESSURE In the 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. (Refer to 21 - TRANSMIS- No >> Replace the Transmission Solenoid/TRS Assembly per the Service Information. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMIS- 21 - 632 AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS - (DIESEL) KJ |