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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 216 (Hydraulic Brakes - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Brake Fluid Loss

Brake Fluid Loss

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
Step Action Yes No
DEFINITION: Brake fluid level is low not related to lining wear.
1 Were you sent here from the Hydraulic Brake Symptom table? Go to Step 2  Go to Diagnostic Starting Point - Vehicle
2
  1. Inspect the following hydraulic brake system components for brake fluid leaks:
    • Flexible brake hose connections, threaded and bolted
    • Flexible brake hose crimp joints
    • Brake pipe fittings
    • Caliper piston seals
    • Master cylinder reservoir
  2. Repair or replace components as necessary. Hydraulic Brake System Diagnosis 
Did you find and correct a condition?		 Go to Step 5  Go to Step 3 
3
  1. Wipe clean the external surface of the master cylinder.
  2. Inspect the master cylinder for a brake fluid leak.
Did you find a brake fluid leak?		 Go to Step 4  Go to Diagnostic Starting Point - Vehicle
4 Replace the brake master cylinder.
Did you complete the replacement?		 Go to Step 5  -
5
  1. Install or connect components that were removed or disconnected during diagnosis.
  2. Road test the vehicle to confirm proper operation. Brake System Vehicle Road Test 
Is the condition still present?		 Go to Step 2  System OK
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