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P0875-UD HYDRAULIC PRESSURE TEST (CONTINUED) 9. (F856) 5-VOLT SUPPLY CIRCUIT SHORT TO GROUND Measure the resistance between ground and the (F856) 5-volt Supply Is the resistance below 5.0 ohms? Yes >> Repair the (F856) 5-volt Supply circuit for a short to ground. Perform 45RFE/545RFE TRANSMISSION VERIFICATION No >> Using the schematics as a guide, check the Powertrain Control Module (PCM) terminals for corrosion, damage, or Perform 45RFE/545RFE TRANSMISSION VERIFICATION 10. COMPARE SCAN TOOL TO PRESSURE GAUGE Turn the ignition off to the lock position. Connect the Line Pressure Adapter, Miller tool #8259 and 0-300 psi Test Gauge, Miller tool #C-3293-SP. Refer to CAUTION: Apply parking brake. In the following steps, compare the scan tool Line Pressure to the Pressure Gauge readings in each gear. CAUTION: Do not overheat transmission. Firmly apply the brakes, move the gear selector into reverse, raise the RPM to 1500, and compare the line pressure Firmly apply the brakes, move the gear selector into drive, raise the RPM to 1500, and compare the line pressure Does the scan tool Line Pressure readings match the Pressure Gauge readings ± 10 psi? Yes >> Go To 11 No >> Replace the Line Pressure Sensor per the Service Information. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. HB AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS 21 - 505 |