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HOMESERVICE MANUALSOLDSMOBILE2004BRAVADA AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 26 (HVAC SYSTEMS - AUTOMATIC)DIAGNOSTIC INFORMATION AND PROCEDURESDTC P1546 (LG8): SHORT OR OPEN CONDITION IS DETECTED ON CONTROL CIRCUITTEST DESCRIPTION
2004 Oldsmobile Bravada AWD

Test Description

2004 Oldsmobile Bravada AWDSECTION Test Description
WARNING: This page is about a different car, the 2002 Buick Regal and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

The number(s) below refer to the step number(s) on the diagnostic table.

  1. 2. Listen for an audible click when the A/C compressor clutch relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
  2. 3. Tests for voltage at the coil side of the A/C compressor clutch relay.
  3. 4. Verifies that the PCM is providing ground to the A/C compressor clutch relay.
  4. 5. Tests if ground is constantly being applied to the A/C compressor clutch relay.
  5. 6. Tests for a short to voltage or an open.
  6. 12. Perform the recalibration procedure for the PCM.
Fig 1: DTC P1546 (LG8) Testing Procedures (1 of 2)
G01719992Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.