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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2222 (Instrument Cluster (Ic), Message Center, And Warning Chimes) >> Diagnostic Tests >> Instrument Cluster (IC) and Warning Chimes >> Pinpoint Tests >> Pinpoint Test AH: DTC U0100 - Lost Communication With ECM/PCM >> Pinpoint Test Ah: DTC U0100 - Lost Communication With ECM/Pcm

Pinpoint Test Ah: DTC U0100 - Lost Communication With ECM/Pcm

WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
  1. AH1 RETRIEVE THE RECORDED DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND INSTRUMENT CLUSTER (IC) SELF-TESTS 
    • Check for recorded instrument cluster (IC) DTCs from the continuous and on-demand self-tests.
    • Is DTC B1318 recorded? 
    1. YES  : Go to Pinpoint Test AF .
    2. NO  : Go to  AH2.
  2. AH2 CHECK THE INSTRUMENT CLUSTER (IC) CONTINUOUS MEMORY DTCs 
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Instrument Cluster (IC) Self-Test
    • Clear the DTCs. Repeat the instrument cluster (IC) self-test.
    • Is DTC U0100 retrieved again? 
    1. YES  : Go to  AH3.
    2. NO  : The system is operating correctly at this time. The DTC may have been set due to high network traffic.
  3. AH3 CHECK OTHER MODULES FOR DTC U0100 
    • Enter the following diagnostic mode on the diagnostic tool: ABS Module Self-Test
    • Carry out the self-test for other modules on the HS-CAN. The ABS module, for example, communicates on the HS-CAN.
    • Is DTC U0100 retrieved from any other module? 
    1. YES  : Go to  AH4.
    2. NO  : Go to  AH5.
  4. AH4 CHECK FOR CORRECT PCM OPERATION 
    • Disconnect all the PCM connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the PCM connectors and make sure they seat correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS - GASOLINE ENGINES article or ELECTRONIC ENGINE CONTROLS - DIESEL ENGINE article. TEST the system for normal operation.
    2. NO  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
  5. AH5 CHECK FOR CORRECT INSTRUMENT CLUSTER (IC) OPERATION 
    • Disconnect the instrument cluster (IC) connector.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect the instrument cluster (IC) connector and make sure it seats correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) . TEST the system for normal operation.
    2. NO  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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