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HOMESERVICE MANUALSOLDSMOBILE2004BRAVADA AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1293 (ELECTRONIC SUSPENSION SYSTEM - AUTOMATIC LEVEL CONTROL)DIAGNOSTIC INFORMATION AND PROCEDURESAUTOMATIC LEVEL CONTROL COMPRESSOR MOTOR INOPERATIVE
2004 Oldsmobile Bravada AWD

Automatic Level Control Compressor Motor Inoperative

2004 Oldsmobile Bravada AWDSECTION Automatic Level Control Compressor Motor Inoperative
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Automatic Level Control Compressor Motor Inoperative

Step Action Yes No
Schematic Reference: Automatic Level Control Suspension Schematics 
1 Did you perform the Automatic Level Control Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Automatic Level Control 
2 Is the rear of the vehicle low? Go to Step 3  Go to TESTING FOR INTERMITTENT AND POOR CONNECTIONS in Wiring Systems
3 Inspect all air tubes and fittings for leaks.
Did you find and correct the condition?		 Go to Step 12  Go to Step 4 
4
  1. Connect a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Use the scan tool to turn ON and OFF the compressor motor.
Does the compressor turn ON and OFF with each command?		 Go to Step 5  Go to Step 7 
5
  1. Turn OFF the ignition.
  2. Disconnect the compressor motor relay.
  3. Probe the battery positive voltage circuit of the compressor relay with a test lamp that is connected to a good ground. Refer to CIRCUIT TESTING and WIRING REPAIRS in Wiring Systems.
Does the test lamp illuminate?		 Go to Step 6  Go to Step 7 
6 Connect a 20A fused jumper wire between the battery positive voltage circuit of the compressor motor relay and the compressor control circuit of the compressor motor relay.
Does the compressor motor turn on?		 Go to Step 11  Go to Step 8 
7 Test the compressor control circuit of the compressor motor relay for an open, short to ground and high resistance. Refer to CIRCUIT TESTING and WIRING REPAIRS in Wiring Systems.
Did you find and correct the condition?		 Go to Step 12  Go to Step 8 
8 Test the positive battery voltage circuit of the compressor motor for an open and high resistance. Refer to CIRCUIT TESTING and WIRING REPAIRS in Wiring Systems.
Did you find and correct the condition?		 Go to Step 12  Go to Step 9 
9 Test the ground circuit of the compressor motor for an open and high resistance. Refer to CIRCUIT TESTING and WIRING REPAIRS in Wiring Systems.
Did you find and correct the condition?		 Go to Step 12  Go to Step 10 
10 Replace the compressor leveling module. Refer to Air Compressor Replacement .
Did you complete the replacement?		 Go to Step 12  -
11 Replace the compressor motor relay.
Did you complete the replacement?		 Go to Step 12  -
12 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 3 
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.