Brake Warning Indicator Always On
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
Brake Warning Indicator Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Brake Warning System Schematics Connector End View Reference: Hydraulic Brakes Connector End Views |
|||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Check the fluid level in the master cylinder brake fluid reservoir. Is the brake fluid level OK? |
Go to Step 3 | Go to Master Cylinder Reservoir Filling |
| 3 |
|
Go to Step 6 | Go to Step 4 |
| 4 |
|
Go to Step 11 | Go to Step 5 |
| 5 | Test the park brake switch signal circuit for a short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 13 | Go to Step 12 |
| 6 | With a scan tool, observe the Brake Fluid Level Switch parameter in the instrument panel data list. Does the scan tool indicate that the Brake Fluid Level Sensor parameter is OFF? |
Go to Step 10 | Go to Step 7 |
| 7 | Disconnect the brake fluid level sensor harness connector. Does the scan tool indicate that the Brake Fluid Level Switch parameter is OFF? |
Go to Step 9 | Go to Step 8 |
| 8 | Test the brake fluid level signal circuit for a short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 13 | Go to Step 10 |
| 9 | Replace the brake fluid level sensor. Refer to Master Cylinder Fluid Level Sensor Replacement . Did you complete the replacement? |
Go to Step 13 | - |
| 10 | Replace the instrument panel cluster (IPC). Refer to Control Module References
in Computer/Integrating Systems. Did you complete the replacement? |
Go to Step 13 | - |
| 11 | Replace the park brake switch. Refer to Park Brake Warning Lamp Switch Replacement
in Park Brake. Did you complete the repair? |
Go to Step 13 | - |
| 12 | Replace the body control module (BCM). Refer to Control Module References
in Computer/Integrating Systems. Did you complete the replacement? |
Go to Step 13 | - |
| 13 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |