During An EPB Actuation
- If the power supply to the EPBCM decreases to less than 8.3 volts, the EPBCM continues the actuation, but stores a related fault code. If the ignition is on, the EPBCM also signals the IC to illuminate the amber parking brake warning indicator and flash the red parking brake warning indicator. On vehicles with the high line IC, a message advising there is a parking brake fault is shown in the message center. The warning indications are discontinued if the power supply voltage increases to 8.3 volts or more.
- If the power supply voltage decreases to less than 7.5 volts, the EPBCM discontinues the actuation. Actuation is automatically resumed if the power supply voltage subsequently increases to 7.5 volts or more and the EPB switch request is still valid.
- If the power supply voltage decreases below 6.5 volts, the EPB function is disabled for the remainder of the ignition cycle.
- If the power supply voltage increases to more than 18.0 volts, the EPBCM immediately disables the EPB function and stores a related fault code. If the ignition is on, the EPBCM also signals the IC to illuminate the amber parking brake warning indicator and flash the red parking brake warning indicator. On vehicles with the high line IC, a message advising that the parking brake has a fault and is not functioning is shown in the message center. The EPB function remains disabled until the power supply voltage is within 9 to 18 volts again. When the power supply voltage is within 9 to 18 volts again, the warning indications are cancelled and actuation is automatically resumed if the EPBCM is in a dynamic mode of operation with a valid EPB switch request.
NOTE:
The instrument cluster shuts down below 8 volts, so warning indications and messages are not displayed below 8 volts. CAN transmission stops if battery voltage drops below 7.0 volts and re-starts when voltage goes above 7.5 volts.