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Inspection and Verification: Notes

WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify the customer concern.
  2. Visually inspect for obvious signs of electrical damage.
    VISUAL INSPECTION TABLE

    Electrical
    • Smart junction box (SJB) fuse 9 (20A)
    • Wiring harness
    • Connections
  3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  4. If the cause is not visually evident, connect the diagnostic tool to the data link connector (DLC) and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
    • check that the program card is correctly installed.
    • check the connections to the vehicle.
    • check the ignition switch position.
  5. If the diagnostic tool still does not communicate with the vehicle, GO to PINPOINT TEST O .
  6. GO to PINPOINT TEST PC .

Diagnostic Trouble Code (DTC) Index 

DIAGNOSTIC TROUBLE CODE (DTC) INDEX

DTC Description Source Action
U0001 High Speed Communication Bus DEM GO to PINPOINT TEST M .
U0002 High Speed Communication Bus Performance Instrument Cluster GO to PINPOINT TEST M .
U0020 Low Speed Communication Bus Performance Instrument Cluster GO to PINPOINT TEST N .
U0073 High Speed Communication Bus Transmission Control Module (TCM) GO to PINPOINT TEST M .
U0100 Lost Communication With ECM/PCM TCM - Aisin transmission CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module which fails the network test.
U0100 Lost Communication With ECM/PCM TCM - CVT transmission CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module which fails the network test.
U1900 CAN Communication Bus Fault ABS Module GO to PINPOINT TEST M .
U1900 CAN Communication Bus Fault Audio Unit GO to PINPOINT TEST N .
U1900 CAN Communication Bus Fault DSM GO to PINPOINT TEST N .
U1900 CAN Communication Bus Fault RCM GO to PINPOINT TEST M .
U1900 CAN Communication Bus Fault SJB GO to PINPOINT TEST N .
U1900 CAN Communication Bus Fault - Receive Error (High Speed CAN) Instrument Cluster GO to PINPOINT TEST M .
U1901 CAN Network #2 Communication BUS Fault - Receive Error (Medium Speed CAN) Instrument Cluster GO to PINPOINT TEST N .
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