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• When Monitored: • Set Condition: Possible Causes LOSS OF PRIME P0944 PRESENT (T16) TCM POWER INPUT CIRCUIT OPEN (T9) OD PRESSURE SWITCH SENSE CIRCUIT OPEN (T9) OD PRESSURE SWITCH CIRCUIT SHORT TO GROUND (T9) OD PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE TRANSMISSION SOLENOID/PRESSURE SWITCH ASSEMBLY INTERNAL TRANSMISSION POWERTRAIN CONTROL MODULE Always perform the 42RLE Pre-Diagnostic Troubleshooting Procedure before proceeding. (Refer to 21 - PRESSURE SWITCH STATES GEAR L/R 2/4 OD R OP OP OP P/N CL OP OP 1st CL OP OP 2nd OP CL OP D OP OP CL OD OP CL CL OP = OPEN CL = CLOSED Theory of Operation Background: Pressure switches are normally off or open (no pressure applied) and read high (+12 volts). When an Diagnostic Test 1. CHECKING FOR LOSS OF PRIME DTC With the scan tool, check for other Transmission DTC’s. Is the DTC P0944 present also? Yes >> Refer to the Transmission category and perform the appropriate diagnostic procedure. No >> Go To 2 21 - 582 AUTOMATIC TRANSMISSION 42RLE - ELECTRICAL DIAGNOSTICS LX |