Brake Warning System Description and Operation DRL Equipped
Brake Warning Indicator
The Brake Warning Indicator illuminates when the when one or more of
the following occurs:
| • | The EBCM performs the bulb check. The EBCM applies ground to the
ABS pressure differential sensor signal circuit. |
| • | The brake pressure differential switch is closed by a pressure
differential between the front and rear brake circuits. The brake pressure
differential switch applies ground to the ABS pressure differential sensor
signal circuit. In turn, the DRL Control Module applies ground to the brake
warning indicator control circuit. |
| • | The park brake is engaged. The park brake warning switch applies
ground to the park brake switch signal circuit. In turn, the Daytime Running
Lamps (DRL) Control Module applies ground to the brake warning indicator
control circuit. |
| • | The ignition is turned to START. The ignition switch applies ground
to the park brake switch signal circuit. In turn, the DRL Control Module applies
ground to the brake warning indicator control circuit. |
Brake Warning System Description and Operation Without DRLs
Brake Warning Indicator
The Brake Warning Indicator illuminates when the when one or more of
the following occurs:
| • | The EBCM performs the bulb check. The EBCM applies ground to the
ABS pressure differential sensor signal circuit. |
| • | The brake pressure differential switch is closed by a pressure
differential between the front and rear brake circuits. The brake pressure
differential switch applies ground to the ABS pressure differential sensor
signal circuit. |
| • | The park brake is engaged. The park brake warning switch applies
ground to the brake warning indicator control circuit. |
