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Home >> Ford >> 2006 >> Focus ZX5 SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 218 (Engine Controls - Pinpoint Tests - 6.0L (99P F450/550) Diesel) >> Pinpoint Test AE: Unable to Activate Self-Test/Network Communication Error >> Test Procedure

Test Procedure

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  1. AE1 CARRY OUT A VEHICLE INSPECTION AND VERIFY THE SELF-TEST PROCEDURE 
    NOTE: The diagnostic tool resets if battery voltage is less than 9.5 volts. If carrying out repeated selftests, disable the glow plug control module (GPCM) and disregard the glow plug codes while the GPCM is disabled. If equipped with a power take-off (PTO) system, it must be disabled while carrying out the PCM self-tests.
    • Check the battery voltage. Refer to CHARGING SYSTEM - GENERAL INFORMATION .
    • Verify that the correct procedure was used to activate the self-test for the diagnostic tool. Refer to DIAGNOSTIC METHODS .

    Was the correct self-test procedure used? 

    Yes No
    GO to  AE2. REFER to DIAGNOSTIC METHODS for the correct operating procedures.
  2. AE2 CARRY OUT THE DATA LINK DIAGNOSTICS TEST 
    • Key ON, engine OFF.
    • Carry out the data link diagnostics test.

    Is system passed obtained? 

    Yes No
    REFER to QUICK TEST . If PCM no response/not equipped, GO to  AE3.
    For all electronic control units no response/not equipped or no response from the diagnostic tool, REFER to MODULE COMMUNICATIONS NETWORK to continue no response from the diagnostic tool diagnosis.
  3. AE3 CHECK THE PCM VPWR CIRCUITS FOR VOLTAGE 
    • Key in OFF position.
    • PCM connector disconnected.
    • Key ON, engine OFF.
    • Measure the voltage between:
      ( + ) PCM Connector, Harness Side ( - )
      VPWR - Pin B34, B46 Ground

    Are the voltages greater than 10.5 volts? 

    Yes No
    GO to  AE4. GO to Pinpoint Test A .
  4. AE4 CHECK THE PCM GROUND CIRCUITS FOR AN OPEN 
    • Key in OFF position.
    • Measure the resistance between:
      ( + ) PCM Connector, Harness Side ( - )
      PWRGND - Pin B10, B11, B23 Ground

    Are the resistances less than 5 ohms? 

    Yes No
    GO to  AE5. REPAIR the open circuit. CLEAR the DTCs.
    REPEAT the self-test.
  5. AE5 CHECK THE VREF CIRCUITS FOR A SHORT TO GROUND 
    • PCM connector disconnected.
    • Measure the resistance between:
      ( + ) PCM Connector, Harness Side ( - )
      VREF - Pin B29, B45, E36 Ground

    Are the resistances greater than 10K ohms? 

    Yes No
    REFER to MODULE COMMUNICATIONS NETWORK to continue no communication with the PCM diagnosis. REPAIR the short circuit. CLEAR the DTCs.
    REPEAT the self-test.
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