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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2780 (Engine Controls - System Test JE Through Z - CNG, Flex-Fuel & Gasoline) >> Test QB: KOEO DTC P0603 Or KOEO, KOER & Continuous Memory DTC P1633 >> Testing

Test QB: KOEO DTC P0603 Or KOEO, KOER & Continuous Memory DTC P1633: Testing

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NOTE: Proceed to DTC testing steps listed in FAULT CODE SETTING CONDITION  table of fault code setting condition.
FAULT CODE SETTING CONDITION

Fault Code KOEO KOER Continuous Memory
P0603  QB1    
P1633  QB1  QB1  QB1
    NOTE: For additional testing information, see DIAGNOSTIC AIDS .
    NOTE: KAPWR is interrupted when PCM or battery is disconnected. DTC P0603 or P1633 may be generated during next PCM power-up.

  1. 1) For KOEO Only DTC P0603, & For KOEO, KOER & Continuous Memory DTC P1633: Check Battery Terminals
    Indicates the PCM has experienced an internal memory fault. However there are external items that can cause this DTC. Possible causes are:
    • Reprogramming.
    • Battery terminal corrosion.
    • KAPWR to PCM interrupt/open.
    • Loose battery connection.
    • Damaged PCM.

    Inspect battery terminals for corrosion or loose connection. Service as necessary. If battery terminals are okay, go to next step.

  2. 2) Check Engine Compartment For Proper Wire Routing

    Inspect wiring harness and connectors for damage or corrosion. Ensure wiring harness is properly routed and not too close to ignition or exhaust components. Service as necessary. If no concerns are found, go to next step.

  3. 3) Check Keep Alive Power Circuit To PCM

    Turn ignition switch to OFF position. Disconnect PCM connector(s). Inspect connector for loose, damaged or corroded terminals. Repair as necessary. Using a DVOM, measure voltage between chassis ground and KAPWR circuit at PCM harness connector. See Figure. While observing DVOM, wiggle and bend small sections of wiring harness between PCM and dash panel. If voltage is continuously 10.5 volts or more, go to next step. If at anytime voltage drops to less than 10.5 volts, isolate open in KAPWR circuit and repair as necessary.

  4. 4) Check For Repeat Of DTC P0603 Or P1633

    Reconnect PCM connector(s). Start engine and allow to idle and reach normal operating temperature. Perform KOEO ON-DEMAND SELF-TEST . Retrieve Continuous Memory DTCs. If DTC P0603 or P1633 is present, replace PCM. If DTCs are not present, unable to duplicate or identify fault at this time. Go to TEST Z, step  1).
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