LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 9 (Engine Controls And Fuel - 5.3L (L83) Or 6.2L (L86) - DTC P0443 To DTC P3452 And Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> DTC P1248, P1249, P124A, P124B, P124C, P124D, P124E, P124F: Cylinder Injector High Control Circuit Shorted To Control Circuit >> Component Testing

Component Testing

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The engine coolant temperature (ECT) sensor must be between 10 - 32°C (50 - 90°F) for an accurate measurement.
  1. Ignition OFF, disconnect the harness connector at the appropriate Q17 Fuel Injector.
  2. Test for 1.06 Ω +/- 10% @ 20°C (68°F) between the terminals of the fuel injector.
    • If not within the specified range 

      Replace the Q17 Fuel Injector.

    • Go to next step: If within the specified range 
  3. Test for infinite resistance between each terminal and the fuel injector housing/case.
    • If less than infinite resistance 

      Replace the Q17 Fuel Injector.

    • Go to next step: If infinite resistance 
  4. All OK.
scientia non olet · About LEMON Manuals