EPC Mode (Drive Mode)

This procedure is used to increase EPC pressure while testing transmission shift operation. This function only allows EPC pressure to be increased from normal PCM commanded pressure. An increase in EPC pressure (such as value 75 or 90), should create harsher shifts. With gearshift lever in "P" position, install pressure gauge in EPC pressure port. See HYDRAULIC PRESSURE TESTS under PERFORMANCE TESTS in FORD 4R70W OVERHAUL article. Start engine. Place gearshift lever in "D" position, and ensure vehicle speed is more than 2 MPH.

• Select OSC mode.
• Select Trans-Drive mode.
• Select PIDs to be monitored.
• Monitor all selected PIDs during test.
• Select Parameter (EPC).
• Select value 00-90, and then press SEND. Values are as follows:

  1. Value 00
     
     sets EPC pressure to 0 psi (0 kPa).
  2. Value 15
     
     sets EPC pressure to 15 psi (103 kPa).
  3. Value 30
     
     sets EPC pressure to 30 psi (206 kPa).
  4. Value 45
     
     sets EPC pressure to 45 psi (310 kPa).
  5. Value 60
     
     sets EPC pressure to 60 psi (411 kPa).
  6. Value 75
     
     sets EPC pressure to 75 psi (517 kPa).
  7. Value 90
     
     sets EPC pressure to 90 psi (620 kPa).
• Reselect a value 0-90, and then press SEND.
• Select XXX, and then SEND at any time to cancel any command sent.