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• When Monitored: • Set Condition: Possible Causes RELATED RELAY DTC’S PRESENT LOW FLUID LEVEL NO. 2 CHECK BALL CUT OR DAMAGED LOW LINE PRESSURE CRACKED OR MISINSTALLED SUMP FILTER OR SEAL STICKING MAIN REGULATOR VALVE IN PUMP VALVE BODY (T29) UD PRESSURE SWITCH SENSE CIRCUIT OPEN (T29) UD PRESSURE SWITCH CIRCUIT SHORT TO GROUND (T29) UD PRESSURE SWITCH SENSE CIRCUIT SHORT TO ANOTHER CIRCUITS TRANSMISSION SOLENOID/TRS ASSEMBLY TRANSMISSION CONTROL MODULE Always perform the 45RFE/545RFE Pre-Diagnostic Troubleshooting Procedure before proceeding. (Refer to Theory of Operation The Transmission system uses five pressure switches to monitor the fluid pressure in the LR, 2C, 4C, UD, and OD GEAR L/R 2C 4C UD OD REVERSE OPEN OPEN OPEN OPEN OPEN P/N CLOSED** OPEN OPEN OPEN OPEN 1ST CLOSED* OPEN OPEN CLOSED OPEN 2ND OPEN CLOSED OPEN CLOSED OPEN 2ND PRIME OPEN OPEN CLOSED CLOSED OPEN 3RD OPEN OPEN OPEN CLOSED CLOSED 4TH OPEN OPEN CLOSED OPEN CLOSED 5TH OPEN CLOSED OPEN OPEN CLOSED *L/R is closed if output speed is below 100 rpm in Drive and Manual 2. L/R is closed in Manual 1. **May be open when rolling in Neutral or at low oil temperatures. Diagnostic Test 1. CHECK FOR RELATED DTCS With the scan tool, check for other transmission DTC’s. Are there any Transmission Control Relay, Line Pressure, and/or Loss of Prime DTCs present? Yes >> Refer to the Transmission category and perform the appropriate symptom. If a Loss of Prime DTC is present, perform its respective test first. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - No >> Go To 2 21 - 584 AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS - (DIESEL) KJ |