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Home >> Chevrolet >> 2025 >> Tahoe LS, RWD >> Repair and Diagnosis >> Suspension >> Suspension Control Systems >> Suspension Controls System >> Diagnostic Information and Procedures >> DTC C1195 >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify DTC C1194 is not set in the K5 Automatic Level Control Module.
    • Go to next step: If DTC is not set 
  3. Inspect the lines between the Compressor and the Air Suspension Control Module Manifold, and the intake hose for blockage or kinks.
    • If blockage or kinks are found 

      Repair as necessary.

    • Go to next step: If blockage or kinks are not found 
    4. NOTE:

    Scan tool control functions will be inhibited by any DTC present in the K5 Automatic Level Control Module. Refer to: Diagnostic Trouble Code (DTC) List - Vehicle to resolve any DTCs necessary.

  4. Using a scan tool, perform the control function Pneumatic Connection Pressure Test.
  5. Using the scan tool, perform control functions Test Compressor Pneumatic Operation.
  6. Verify the compressor runs and passes.
    • If compressor does not run, or the test fails 
    1. Test for damage, improper seating, evidence of water/ice, or leaks using soapy water on the following components:
      • Air Suspension Control Module Manifold
      • Fittings
      • Air line from the Air Suspension Control Module Manifold to the Automatic Level Control Air Supply Reservoir
      • Automatic Level Control Air Supply Reservoir
      • If damage, improper seating, evidence of water/ice, or leaks are found

        Repair damage, improper seating, evidence of water/ice, or leaks.

      • Go to next step: If no damage, improper seating, evidence of water/ice, or leaks are found
    2. Disconnect the intake hose from the G4 Automatic Level Control Air Compressor.
    3. Using a scan tool, perform the control function Pneumatic Connection Pressure Test.
    4. Using a scan tool, perform the control function Test Compressor Pneumatic Operation.
    5. Verify compressor runs and passes.
      • If the compressor does not run or the test fails

        Replace the G4 Automatic Level Control Air Compressor.

      • Go to next step: If the compressor runs and the test passes
    6. Inspect or replace the intake hose.
    • Go to next step: If compressor runs and the test passes 
  7. Clear DTCs. Operate system under the Conditions for Running the DTC.
  8. Verify DTCs do not reset.
    • If DTC sets 

      Replace the K5 Automatic Level Control Module

    • Go to next step: If the DTC does not set 
  9. All OK.
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