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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1302 (Data Communication System) >> Diagnostic Information and Procedures >> DTC U1500, U1511, U1512, or U1513 >> Circuit/System Testing >> Window Malfunction Test

Window Malfunction Test

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the appropriate window motor.
  2. Ignition OFF, test for less than 2.0 ohm between the ground circuit terminal 4 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 3 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. Test for 6.0-7.0 volts between the LIN circuit terminal 5 and ground.
    • If greater than the specified range, test the LIN circuit for a short to voltage. If the circuit tests normal, replace the applicable door module.
    • If less than the specified range, test the LIN circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the applicable door module.
  5. Ignition OFF, reconnect the harness connector at the window motor.
  6. Ignition ON, observe the appropriate scan tool Window Motor Fault Status parameter while raising and lower the window. The parameter should read No Fault.
    • If the parameter reads Motor Fault, Hall Fault, Memory Fault, LIN Fault, Anti-Trap Fault or Thermo Active, test or replace the appropriate power window motor.
  7. If all circuits test normal, replace the appropriate door module.
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