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Home >> Ford >> 2009 >> Escape Base, 2.5 7, AWD, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Pinpoint Test KP: Charge Air Cooler (CAC) Pump Through Pinpoint Test Z: Intermittent - (Except Diesel & Hybrid) >> Pinpoint Test QA: Unable To Activate Self-Test/Network Communication Error >> Test Procedure
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Test Procedure

  1. QA1 CARRY OUT A VEHICLE INSPECTION AND VERIFY THE SELF-TEST PROCEDURE 
    NOTE: If the self-test or communication concern occurred after a failed or an aborted reprogram, the module may be blank. Attempt to reprogram the module again before continuing with this pinpoint test.
    • Visually inspect the following for obvious signs of electrical damage:
      • harness wiring
      • electrical connections
    • Verify the correct procedure was used to activate the self-test for the scan tool. Refer to SCAN TOOL SETUP AND FUNCTIONALITY .

    Was the correct self-test procedure used? 

    Yes No
    GO to  QA2. REFER to SCAN TOOL SETUP AND FUNCTIONALITY .
  2. QA2 CARRY OUT THE NETWORK TEST 
    NOTE: When using Integrated Diagnostic System (IDS), the scan tool attempts to communicate with the PCM first. After establishing communication with the PCM, the scan tool then attempts to communicate with all modules on the vehicle. If an IDS session cannot be established, IDS may state no communication can be established with the PCM:
    • Choose No when the scan tool prompts whether or not to retry communication.
    • Enter a PCM part number, tear tag or calibration number to identify the vehicle and start a session. The PCM part number and 4-character tear tag are located on the PCM.
      • Ignition ON, engine OFF.
      • Carry out the network test.

    Do all modules indicate pass? 

    Yes No
    REFER to SYMPTOM CHARTS - GASOLINE MODELS article , GO to Pinpoint Test QT . If only PCM indicates fail, GO to  QA3.
    For network test or all other modules indicates fail, REFER to the appropriate Module Communications Network article , to diagnose The Powertrain Control Module (PCM)
    Does Not Respond To The Scan Tool Or No High Speed Controller Area Network (HS-CAN) Communication Symptom.
  3. QA3 CHECK FOR VREF VOLTAGE AT A SENSOR 
    • Ignition ON, engine OFF.
    • For electronic throttle control (ETC) applications,
    • ETBTPS connector disconnected.
    • Measure the voltage between:
      (+) ETBTPS Connector, Harness Side (-) ETBTPS Connector, Harness Side
      ETCREF ETCRTN
    • For all others,
    • TP Sensor connector disconnected.
    • Measure the voltage between:
    (+) TP Sensor Connector, Harness Side (-) TP Sensor Connector, Harness Side
    VREF SIGRTN

    Is the voltage between 4.5 - 5.5 V? 

    Yes No
    REFER to the appropriate Module Communications Network article to diagnose The Powertrain Control Module (PCM) Does Not Respond To The Scan Tool Or No High Speed Controller Area Network (HS-CAN) Communication Symptom. For Crown Victoria,
    Grand Marquis,
    Ranger, and
    Town Car, GO to  QA6.
    For all others, GO to  QA4.
  4. QA4 CHECK THE ISP-R VOLTAGE AT THE PCM HARNESS CONNECTOR 
    • Ignition OFF.
    • PCM connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
    (+) PCM Connector, Harness Side (-)
    ISP-R Ground

    Is the voltage greater than 10 V? 

    Yes No
    GO to  QA5 REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test
  5. QA5 CHECK THE PCM VPWR CIRCUITS FOR VOLTAGE 
    • Ignition OFF.
    • Disconnect the PCM.
    • Connect a 5 amp fused jumper wire between the following:
    Point A PCM Connector, Harness Side Point B
    PCMRC Ground
    • Ignition ON, engine OFF.
    • Measure the voltage between:
    (+) PCM Connector, Harness Side (-)
    VPWR Ground

    Are the voltages greater than 10 V? 

    Yes No
    GO to  QA7. GO to Pinpoint Test B .
  6. QA6 CHECK THE PCM VPWR CIRCUITS FOR VOLTAGE 
    • Ignition OFF.
    • Disconnect the PCM.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
    (+) PCM Connector, Harness Side (-)
    VPWR Ground

    Is the voltage greater than 10 V? 

    Yes No
    GO to  QA7. GO to Pinpoint Test B .
  7. QA7 CHECK THE PCM GROUND CIRCUITS FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between:
    (+) PCM Connector, Harness Side (-)
    PWRGND Ground

    Are the resistances less than 5 ohms? 

    Yes No
    GO to  QA8. REPAIR the open circuit. CLEAR the DTCs.
    REPEAT the self-test.
  8. QA8 CHECK FOR CORRECT PCM OPERATION 
    • Disconnect all the PCM connectors.
    • Visually inspect for:
      • pushed out pins
      • corrosion
    • Connect all the PCM connectors and make sure they seat correctly.
    • Carry out the network test and verify the concern is still present.

    Is the concern still present? 

    Yes No
    INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) , Programming the VID Block for a Replacement PCM. The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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