LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mercury >> 2009 >> Sable Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1190 (Information Center) >> Diagnostic Tests >> Instrument Cluster (IC), Message Center and Warning Chimes >> Pinpoint Tests >> Pinpoint Test AI: DTC U0164 - Lost Communication With HVAC Control Module (EATC) >> Pinpoint Test Ai: DTC U0164 - Lost Communication With HVAC Control Module (EATC)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Pinpoint Test Ai: DTC U0164 - Lost Communication With HVAC Control Module (EATC)

WARNING: This page is about a different car, the 2008 Mercury Sable, 2008 Ford Taurus X, and 2008 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
  1. AI1 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 AB .
    2. NO  : Go to  AI2.
  2. AI2 RECHECK THE INSTRUMENT CLUSTER (IC) DTCs 
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Instrument Cluster (IC) Self-Test
    • Repeat the instrument cluster (IC) self-test.
    • Clear the DTCs.
    • Is DTC U0164 still present? 
    1. YES  : Go to  AI3.
    2. NO  : The system is operating correctly at this time. The DTC may have been set due to high network traffic.
  3. AI3 CHECK THE NETWORK OPERATION 
    • Enter the following diagnostic mode on the diagnostic tool: Network Test
    • Carry out the network test.
    • Does the HVAC module pass the network test? 
    1. YES  : Go to  AI4.
    2. NO  : REFER to MODULE COMMUNICATIONS NETWORK article to diagnose no communication with the ABS module.
  4. AI4 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.
scientia non olet · About LEMON Manuals