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P0870-OD HYDRAULIC PRESSURE TEST (CONTINUED) For the Transmission circuit diagram (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 42RLE - SCHE- For a complete wiring diagram Refer to Section 8W. • When Monitored: • Set Condition: Possible Causes LOSS OF PRIME P0944 PRESENT (T16) TRANSMISSION CONTROL RELAY OUTPUT 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 Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMIS- Theory of Operation Pressure switches are normally off or open (no pressure applied) and read high (+12 volts). When an element is Diagnostic Test 1. CHECKING FOR LOSS OF PRIME DTC With the scan tool, check for other Transmission DTCs. Is the DTC P0944 present also? Yes >> Refer to the Transmission category and perform the appropriate diagnostic procedure. Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. No >> Go To 2 21 - 180 AUTOMATIC TRANSMISSION 42RLE - ELECTRICAL DIAGNOSTICS ND |