LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2006 >> Focus ZX5 SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1650 (Engine Controls - Pinpoint Tests - (Hybrid) - Fault Code Index, Pinpoint Tests A - DN) >> Pinpoint Test B: Powertrain Control Module (PCM) Power Relay >> Test Procedure

Test Procedure

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
  1. B1 CHECK THE VPWR CIRCUIT FOR AN OPEN IN THE HARNESS 
    • PCM connector disconnected.
    • PCMPWR Relay connector disconnected.
    • Measure the resistance between:
      ( + ) PCMPWR Relay Connector, Harness Side ( - ) PCM Connector, Harness Side
      VPWR - Pin 5 VPWR - Pin B35, B36

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  B2. REPAIR the open circuit.
  2. B2 CHECK THE B+ VOLTAGE TO PCMPR 
    • Key ON, engine OFF.
    • Measure the voltage between:
      ( + ) PCMPWR Relay Connector, Harness Side ( - )
      B+ - Pin 3 Ground
      IGN START/RUN - Pin 1 Ground

    Are the voltages greater than 10.5 V? 

    Yes No
    GO to  B3. Key in OFF position. REPAIR the open circuit.
  3. B3 CHECK THE GROUND CIRCUIT TO THE PCM POWER RELAY 
    • Measure the voltage between:
      ( + ) PCMPWR Relay Connector, Harness Side ( - ) PCMPWR Relay Connector, Harness Side
      B+ - Pin 3 GND - Pin 2

    Is the voltage greater than 10.5 V? 

    Yes No
    INSTALL a new PCMPWR relay. Key in OFF position. REPAIR the open circuit.
scientia non olet · About LEMON Manuals