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Diagnostic Test 1. CHECK IF RELATED DTCS ARE PRESENT With the scan tool, check for other transmission DTCs Are there any Transmission; solenoid, line pressure, speed sensor, and/or loss of prime DTCs present? Yes >> Refer to appropriate symptom in the Transmission category. Perform the test for P0944-LOSS OF PRIME first if it is present. No >> Go To 2 2. CHECK DTC EVENT DATA With the scan tool, read and record the DTC EVENT DATA. NOTE: Make sure to record all DTC EVENT DATA stored in the scan tool for future reference in this test Does the DTC EVENT DATA display information for the DTC P0733? Yes >> Go To 4 No >> Go To 3 3. CHECK THE TARGET GEAR IN DTC EVENT DATA In the DTC EVENT DATA, identify the DTC that was recorded earlier. Does the DTC EVENT DATA display information for the DTC P1790, with target gear = 3rd, or with both Yes >> Go To 4 No >> Go To 7 4. CHECK INPUT RPM IN DTC EVENT DATA Refer to the DTC EVENT DATA recorded earlier. Does the Input RPM read zero? Yes >> Check the input speed sensor and wiring. Refer to test P0715 and diagnose as if the DTC is current. No >> Go To 5 5. CHECK LINE PRESSURE READING Refer to the DTC EVENT DATA recorded earlier. Is the line pressure reading more than 10 psi below the desired line pressure? Yes >> Go To 6 No >> Go To 7 6. CHECK TRANSMISSION OIL FILTER Turn the ignition off to the lock position. Remove and inspect the Transmission Oil Pan for excessive debris per the Service Information. Remove and inspect the Primary Oil Filter per the Service Information. NOTE: Make sure the Primary Transmission Oil Filter and seal are properly installed and are not cracked or Does the Oil Pan contain excessive debris and/or is the Primary Oil Filter cracked, plugged or mis-in- 21 - 488 AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS - (DIESEL) KJ |