LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2000 >> Contour SE, 2.0 3, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2771 (Engine Controls - Pinpoint Test KE: Idle Air Control (IAC) Valve Through Pinpoint Test QA: Unable To Activate Self-Test/Network Communication Error/DTC P1001 - CNG, Flex-Fuel & Gasoline) >> Pinpoint Test NB: Malfunction Indicator Lamp >> Test Procedure

Test Procedure

WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2004 Mercury Sable, 2004 Mercury Mountaineer, 2004 Mercury Monterey, 2004 Mercury Marauder, and 2004 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.
  1. NB1 MALFUNCTION INDICATOR LAMP ALWAYS ON (NO DTCS PRESENT) 

    Does the vehicle start? 

    Yes No
    GO to  NB2. Concern is elsewhere. RETURN to SYMPTOM CHARTS - CNG, FLEX-FUEL & GASOLINE for further direction.
  2. NB2 CHECK THE MIL CIRCUIT FOR A SHORT TO GROUND IN THE HARNESS 
    • PCM connector disconnected.
    • Measure the resistance between:
    ( + )PCM Connector, Harness Side ( - )Vehicle battery
    MIL - Pin 2 Negative terminal

    Is the resistance greater than 10K ohms? 

    Yes No
    INSTALL a new PCM.
    Refer to FLASH ELECTRICALLY ERASEABLE PROGRAMMABLE READ ONLY MEMORY - FLASH EEPROM .    		 REPAIR short circuit to GND.
  3. NB3 MALFUNCTION INDICATOR LAMP (MIL) NEVER ON 

    Does the vehicle start? 

    Yes No
    GO to  NB4. Concern is elsewhere. RETURN to SYMPTOM CHARTS - CNG, FLEX-FUEL & GASOLINE for further direction.
  4. NB4 MIL HARNESS CHECK 
    • PCM connector disconnected.
    • Key ON Engine OFF.
    • Connect a 5 amp fused jumper wire between the following:
    Point A PCM Connector, Harness Side Point B
    MIL - Pin 2 Ground
    • REMOVE jumper wire(s)

    Did the MIL Illuminate when grounded? 

    Yes No
    KEY OFF. INSTALL a new PCM. KEY OFF
    GO to  NB5.
  5. NB5 CHECK THE VOLTAGE ON THE B+ CIRCUIT 
    • PCM disconnected.
    • IC connector disconnected.
    • Key ON Engine OFF.
    • Measure the voltage between:
    ( + )IC Connector, Harness Side ( - )Vehicle battery
    B+ Negative terminal

    Is the voltage greater than 10.5 V? 

    Yes No
    KEY OFF
    GO to  NB6.    		 KEY OFF. REPAIR open circuit.
  6. NB6 CHECK FOR AN OPEN MIL CIRCUIT BETWEEN THE PCM AND INSTRUMENT CLUSTER 
    • PCM disconnected.
    • IC connector disconnected.
    • Measure the resistance between:
    ( + )PCM Connector, Harness Side ( - )IC Connector, Harness Side
    MIL - Pin 2 MIL

    Is the resistance less than 5 ohms? 

    Yes No
    Refer to the appropriate INFORMATION, GAUGES & WARNING DEVICES INSTRUMENT CLUSTER article for instrument cluster diagnostics
    If OK, REPLACE the PCM.
    Refer to FLASH ELECTRICALLY ERASEABLE PROGRAMMABLE READ ONLY MEMORY - FLASH EEPROM
    VERIFY the repair by turning the key to the ON position.    		 REPAIR open circuit
    VERIFY the repair by turning the key to the ON position.
scientia non olet · About LEMON Manuals