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Home >> Ford >> 2005 >> Escape Hybrid, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 16 (Automatic Transmission - Cd4E) >> Diagnosis And Testing >> Pinpoint Tests - Non OSC Equipped Vehicle >> Pinpoint Tests >> Pinpoint Test E: Electronic Pressure Control (EPC) Solenoid

Pinpoint Test E: Electronic Pressure Control (EPC) Solenoid

WARNING: This page is about a different variant/trim than selected.
  1. E1 ELECTRONIC DIAGNOSTICS 
    • Key in OFF position.
    • Make sure the transaxle vehicle harness connector is fully seated, terminals are fully engaged in connector and in good condition before proceeding.
    • Connect the scan tool.
    • Key in ON position.
    • Carry out KOEO Test until continuous DTCs have been displayed.
    • Enter Output Test Mode (OTM). Refer to ON-BOARD DIAGNOSTICS .
    • Select the mode ALL ON. Push START to turn outputs on. Push STOP to turn outputs off.
    • Does vehicle enter OTM? 
    1. Yes  : REMAIN in OTM. GO to E2.
    2. No  : PRESS START. If vehicle does not enter OTM, refer to INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid).
  2. E2 CHECK ELECTRICAL SIGNAL OPERATION 
    CAUTION: Do not pry on the connector. Pull up on the transaxle vehicle harness connector.
    • Key in OFF position.
    • Disconnect: Transaxle Connector.
    • Use a mirror to inspect both ends of connector for damaged or pushed-out pins, corrosion, loose wires and missing or damaged seals.
    • Key in ON position.
    • Measure the voltage between pin 8 and pin 9 of the transaxle vehicle harness connector.
      Fig 1: Measuring Voltage Between Pin 8 And Pin 9 Of Transaxle Vehicle Harness Connector
      G03900579Courtesy of FORD MOTOR CO.
    • While observing VOM, press START and STOP to cycle solenoid output on and off.
    • Does the suspect solenoid output voltage change at least 0.5 volt? 
    1. Yes  : GO to  E5.
    2. No  : GO to E3.
  3. E3 CHECK CONTINUITY OF SOLENOID SIGNAL AND VPWR HARNESS CIRCUITS 
    • Key in OFF position.
    • Disconnect: PCM.
    • Inspect for damaged or pushed-out pins, corrosion or loose wires.
    • Measure the resistance between the PCM pins C35 and C36 and the transaxle harness connector pin 9.
      Fig 2: Measuring Resistance Between PCM Pins C35 And C36 And Transaxle Harness Connector Pin 9
      G03900580Courtesy of FORD MOTOR CO.
    • Measure the resistance between the PCM pin T11 and the transaxle harness connector pin 8.
      Fig 3: Measuring Resistance Between PCM And Transaxle Harness
      G03900581Courtesy of FORD MOTOR CO.
    • Is each resistance less than 5 ohms? 
    1. Yes  : GO to E4.
    2. No  : REPAIR open circuit(s). RECONNECT all components. CLEAR the DTCs and RERUN On-Board Diagnostics.
  4. E4 CHECK HARNESS FOR SHORT TO POWER AND GROUND 
    • Key in OFF position.
    • Disconnect: Transaxle Connector.
    • Measure the resistance between the PCM pin T11 and the PCM pins C35 and C36.
      Fig 4: Measuring Resistance Between PCM Pins
      G03900582Courtesy of FORD MOTOR CO.
    • Measure the resistance between the PCM pin T11 and the PCM pins C47, C48 and C49.
      Fig 5: Measuring Resistance Between PCM Pins
      G03900583Courtesy of FORD MOTOR CO.
    • Measure the resistance between the PCM pin T11 and the PCM pin T41.
      Fig 6: Measuring Resistance Between PCM Pins
      G03900584Courtesy of FORD MOTOR CO.
    • Is each resistance greater than 10,000 ohms? 
    1. Yes  : GO to E5.
    2. No  : REPAIR short circuit(s). RECONNECT all components. CLEAR the DTCs and RERUN On-Board Diagnostics.
  5. E5 TRANSAXLE FUNCTIONAL TEST 
    NOTE: LED will turn GREEN when solenoid activates and turn OFF when deactivated. LED will turn RED if activated solenoid/harness is shorted to B+. LED will remain OFF if an activated solenoid/harness is shorted to ground or no continuity (open circuit).
    • Connect: PCM.
    • Disconnect: Transaxle Connector.
    • Install line pressure gauge at line tap on case.
    • Connect: Transmission Tester.
    • Set Bench/Drive switch to DRIVE mode.
    • Rotate gear selector switch to 1st gear position.
    • Carry out the EPC Functional Test as outlined in Transmission Tester Manual.
    • Observe line pressure on gauge while pressing the EPC switch (engine must be running).
    • Does EPC (LED) activate when EPC switch is pressed and line pressure drops? 
    1. Yes  : INSTALL a new PCM. RERUN On-Board Diagnostics.
    2. No  : GO to E6.
  6. E6 CHECK RESISTANCE OF SOLENOID/HARNESS 
    • Set Bench/Drive switch to BENCH mode.
    • Rotate gear select switch to OHMS CHECK position.
    • Measure the resistance between EPC jack and VPWR jack on the Transmission Tester.
      Fig 7: Measuring Resistance Between EPC Jack And VPWR Jack On Transmission Tester
      G03900585Courtesy of FORD MOTOR CO.
    • Is resistance between 3.75 - 5.92 ohms? 
    1. Yes  : GO to E7.
    2. No  : INSTALL a new solenoid body assembly. CLEAR the DTCs. RERUN On-Board Diagnostics tests.
  7. E7 CHECK SOLENOID/HARNESS FOR SHORT TO GROUND 
    • Measure the resistance between BAT - jack (engine ground) and EPC, and VPWR/EPC PWR on the transmission tester.
      Fig 8: Measuring Resistance Between BAT - Jack (Engine Ground) And EPC, And VPWR/EPC PWR On Transmission Tester
      G03900586Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    1. Yes  : INSTALL a new solenoid body assembly. REFER to MAIN CONTROL VALVE BODY . RECORD and CLEAR the DTCs. RERUN On-Board Diagnostics tests.
    2. No  : REFER to DIAGNOSIS BY SYMPTOM .
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