DTC 29 Or DTC 30: Hydraulic Unit BRAKELINE

DTC 29 - Right Front & Left Rear

DTC 30 - Left Front & Right Rear

1. Check hydraulic unit. See HYDRAULIC UNIT under COMPONENT TESTING  . Replace hydraulic unit as necessary. If hydraulic unit is okay, go to next step.
2. Check brake fluid level. Top off fluid as necessary. Clear DTCs and recheck system operation. If fluid level is okay, raise and support vehicle. Check for uneven brake force distribution by applying brakes and attempting to rotate tires. If brake operation is okay, go to next step. If brake operation is not okay, check for pinched, kinked or damaged conventional brakeline. Replace brakeline as necessary.
3. Release parking brake. Rotate wheels by hand and check for brake drag. If brake drag exists, check and repair parking brake system as necessary. If brake drag does not exist, no problem is indicated at this time. Clear DTCs and recheck system operation. If DTC resets, replace hydraulic unit.