P1747**
EPC
EPC solenoid circuit failure, shorted circuit to ground.
Voltage through EPC solenoid is checked. An error will be noted if tolerance is exceeded.
Short circuit - causes minimum EPC pressure (minimum capacity) and limits engine torque (alt. firing). With zero EPC - no engagements. If engagement occurs and then EPC goes to zero, then No. 2nd, 3rd, and 5th gears. Slips in 1st and 4th with high input torque.
Go To Pinpoint Test
PINPOINT TEST D: ELECTRONIC PRESSURE CONTROL (EPC) SOLENOID
NOTE: Refer to the Transmission Vehicle Harness Connector illustration preceding these pinpoint tests.
NOTE: Refer to the Transmission Internal Harness Connector illustration preceding these pinpoint tests.
NOTE: Read and record all DTCs. All Digital TR Sensor and VSS DTCs must be repaired before entering Output State Control
Measure and record the resistance of the EPC solenoid. Resistance should be between 3.7-7.2 ohms.
D6 CHECK SOLENOID FOR SHORT TO GROUND
Check for continuity between engine GROUND and the EPC solenoid terminals with ohmmeter or other low current tester (less than 200 milliamps). Connection should show infinite resistance (no continuity).
Yes INSTALL a new solenoid and install the transmission fluid pan.
No REFER to the Diagnosis by Symptom Index in Diagnosis By Symptom for pressure concerns.
×