PINPOINT TEST L : The Brake Warning Indicator is Always On: Notes
Diagnostic Overview
Refer to Instrument Cluster for schematic and connector information.
Normal Operation and Fault Conditions
Refer to Instrument Panel Cluster (IPC) , Brake Warning Indicator, Instrument Panel Cluster (IPC) , Parking Brake Position Switch and Instrument Panel Cluster (IPC) , Brake Fluid Level Switch.
If the brake warning indicator request or brake (red) warning indicator request messages are missing for less than 5 seconds, the IPC defaults the brake warning indicator to its last state (on or off) based upon the last known good message received.
If the brake warning indicator request message is missing for more than 5 seconds, the IPC sets DTC U0140:00 and defaults the brake warning indicator on.
If the IPC does not receive the brake (red) warning indicator request message from the ABS module for more than 5 seconds, the IPC sets DTC U0121:00 and defaults the ABS warning indicator on.
BCM DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| B1048:01 | Brake Fluid Level Switch: General Electrical Failure | A continuous DTC that sets in the BCM when the BCM detects an open or short to ground on the brake fluid level switch input. |
| C1D00:11 | Park Brake Apply Switch: Circuit Short To Ground | An on-demand DTC that sets in the BCM if the BCM detects a short to ground on the parking brake input circuit. |
Visual Inspection and Diagnostic Pre-checks
- Inspect the base brake system and the parking brake system for correct operation.
- Make sure the brake fluid level switch connector is connected and check for signs of connector terminal damage, corrosion or pushed out pins.
- Inspect the brake fluid level switch wiring for signs of a cut or opened circuit. Inspect the brake fluid level switch for signs of any external damage.