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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2808 (Engine Controls - Pinpoint Tests - (Hybrid) - Pinpoint Tests QA - Z) >> Pinpoint Test QB: Keep Alive Power >> 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. QB1 DTCS P0603 AND P1633: CHECK THE 12 VOLT BATTERY TERMINALS 
    NOTE: If KAPWR is interrupted to the PCM because of a battery or PCM disconnect, a DTC can be generated on the first power-up.
    • Inspect the 12 volt battery cables for loose connections and for corrosion.

    Are the 12 volt battery terminal connections in good condition? 

    Yes No
    Key in OFF position.
    GO to  QB2.    		 REPAIR as necessary.
  2. QB2 CHECK KAPWR TO THE PCM 
    • PCM connector disconnected.
    • Measure the voltage between:
      ( + ) PCM Connector, Harness Side ( - ) Vehicle Battery
      KAPWR - Pin B45 Negative terminal

    Is the voltage less than 10.5 V? 

    Yes No
    REPAIR the circuit. GO to  QB3.
  3. QB3 CHECK FOR A REPEAT OF THE DTC 
    • PCM connector connected.
    • Clear all DTCs that may have been caused by the PCM disconnect.
    • Test drive the vehicle and allow the engine to reach normal operating temperature.
    • Check for self-test DTCs.

    Are DTCs P0603 or P1633 present? 

    Yes No
    GO to  QB4. Unable to duplicate or identify the concern at this time.
    GO to Pinpoint Test Z .
  4. QB4 INSPECT THE ENGINE COMPARTMENT FOR CORRECT WIRE ROUTING 
    • Inspect the electronic engine control (EEC) system wiring for correct wire routing.
    • Check the wiring routing to establish if any of the electrical connectors are being stressed due to poorly routed wiring. If necessary re-route and secure the wiring.
    • Visually inspect wiring and connectors.

    Are any concerns present? 

    Yes No
    REPAIR as necessary. GO to  QB5.
  5. QB5 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 PCM self-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) . The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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