EPC In BENCH MODE: Notes

The BENCH MODE is also used to test the functionality of the transmission's electronic pressure control. During BENCH MODE, the electronic pressure control (EPC) solenoid can ramp up/down in increments of 103 kPa (15 psi) from zero to 620 kPa (90 psi) and 620 kPa (90 psi) to zero psi.

The OSC functions for the parameter EPC allows the technician to choose the following options:

• EPC - activates EPC to selected values.
• 00 - sets EPC pressure to 00 kPa (00 psi).
• 15 - sets EPC pressure to 103 kPa (15 psi).
• 30 - sets EPC pressure to 206 kPa (30 psi).
• 45 - sets EPC pressure to 310 kPa (45 psi).
• 60 - sets EPC pressure to 411 kPa (60 psi).
• 75 - sets EPC pressure to 517 kPa (75 psi).
• 90 - sets EPC pressure to 620 kPa (90 psi).

To carry out an EPC BENCH MODE pressure functionality test, install a pressure gauge in the EPC port. The following requirements are required to carry out this test:

• VSS and digital TR sensor operational
• No VSS and digital TR sensor DTCs
• Transmission range selector lever in P
• Key ON
• Engine ON
• Engine speed at least 1,500 rpm for accurate EPC pressure measurement

To carry out an EPC BENCH MODE solenoid circuit pinpoint test, the following requirements are required.

• VSS and digital TR sensor operational
• No VSS and digital TR sensor DTCs
• Transmission range selector lever in P
• Key ON
• Engine OFF