Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Cadillac >> 2012 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1228 (Immobilizer System) >> Diagnostic Information and Procedures >> DTC P254F >> Component Testing

Component Testing

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Hood Ajar Switch

  1. Ignition OFF, disconnect the harness connector at the hood ajar switch.
  2. With the switch in the hood closed position, test for infinite resistance between the ground terminal C and the signal terminal A.
    • If not infinite, replace the hood ajar switch.
  3. Test for less than 2.0 ohms between the ground terminal C and the signal terminal B.
    • If greater than the specified range, replace the hood ajar switch.
  4. With the switch in the hood open position, test for infinite resistance between the ground terminal C and the signal terminal B.
    • If not infinite, replace the hood ajar switch.
  5. Test for less than 2.0 ohms between the ground terminal C and the signal terminal A.
    • If greater than the specified range, replace the hood ajar switch.
scientia non olet · About Mike's Workshop Manuals