EPC Mode (Drive Mode)

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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 should create harsher shifts. With gearshift lever in "P" position, install pressure gauge in EPC pressure port. See Figure. Start engine. Place gearshift lever in "OD" 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 "Parameters - EPC".
Select value 0-90, then press SEND. 00 - sets EPC pressure to zero psi, 15 - sets EPC pressure to 15 psi (1.1 kg/cm² ), 30 - sets EPC pressure to 30 psi (2.1 kg/cm² ), 45 - sets EPC pressure to 45 psi (3.2 kg/cm² ), 60 - sets EPC pressure to 60 psi (4.2 kg/cm² ), 75 - sets EPC pressure to 75 psi (5.3 kg/cm² ), 90 - sets EPC pressure to 90 psi (6.3 kg/cm² ).
Re-select a value 0-90, then press SEND.
Select "XXX", then SEND at any time to cancel any command sent.