LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2006 >> Focus ZX5 SE, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Pinpoint Test KE: Idle Air Control (IAC) Valve Through Pinpoint Test Z: Intermittent - (Except Diesel & Hybrid) >> Pinpoint Test QB: DTCS P0603 Or P1633: Keep Alive Power >> Test Procedure

Test Procedure

  1. QB1 CHECK THE 12-VOLT BATTERY TERMINALS 
    NOTE: If the KAPWR is interrupted to the PCM when a breakout box is installed or the battery is disconnected, DTC P0603/P1633 can be generated on the first power-up.
    NOTE: If DTC P0603 occurred right after or during a failed reprogramming of the PCM, clear the DTCs and repeat the PCM self-test. If DTC P0603 is retrieved again, continue with this pinpoint test.
    • Inspect the 12-volt battery cables for loose connections and for corrosion.

    Are the 12-volt battery terminal connections in good condition? 

    Yes No
    GO to  QB2. REPAIR as necessary.
    CLEAR the DTCs. REPEAT the self-test.
  2. QB2 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 the wiring and connectors.

    Is a concern present? 

    Yes No
    REPAIR as necessary.
    CLEAR the DTCs. REPEAT the self-test.    		 GO to  QB3.
  3. QB3 CHECK KAPWR TO THE PCM 
    • Key in OFF position.
    • PCM connector disconnected.
    • Measure the voltage between:
      ( + ) PCM Connector, Harness Side ( - ) 12 Volt Vehicle Battery
      KAPWR Negative terminal
    • While observing the multimeter, grasp the EEC harness and wiggle, shake or bend a small section while working from the battery to the PCM.

    Is the voltage greater than 10 V? 

    Yes No
    GO to  QB4. ISOLATE the concern and REPAIR as necessary.
    CLEAR the DTCs. REPEAT the self-test.
  4. QB4 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.
    • Carry out the PCM self-test.

    Is DTC P0603 or P1633 present? 

    Yes No
    GO to  QB5. Unable to duplicate or identify the concern at this time.
    GO to Pinpoint Test Z .
  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.
scientia non olet · About LEMON Manuals