Brakes - Front Brake Noises/Vibration On Low Speed Apply
NUMBER: 02-001-10GROUP: Steering
DATE: May 19, 2010
SUBJECT:
Clicking, Ticking, Grinding, Rubbing Sound and/or Vibration From Front Brakes
OVERVIEW:
This bulletin involves inspecting front hub run out and if necessary replacing the steering knuckle(s), rotors or resurfacing the rotors.
MODELS:
2010 (MK) Compass/Patriot
2010 (PM) Caliber
NOTE:
This bulletin applies to vehicles built before April 20, 2010 (MDH0421XX).
SYMPTOM/CONDITION:
Customer may experience front brake cyclic clicking, ticking, grinding, rubbing sound during low speed (<15 mph) light brake apply (noise is not present on hard braking), or vibration through steering wheel, seat, body, pedal while braking.
DIAGNOSIS:
If customer experiences a cyclic/repetitive clicking, ticking, creaking, grinding, thumping, or rubbing sound coming from the front of the vehicle during light braking typically at low speeds (<15 mph), proceed to Repair Procedure A. If customer experiences roughness/vibration during braking, felt through steering wheel, seat, brake pedal, or vehicle body, proceed to Repair Procedure B.
PARTS REQUIRED:
NOTE:
DO NOT ORDER PARTS UNTIL MAY 24, 2010 DUE TO LIMITED QUANTITIES
SPECIAL TOOLS / EQUIPMENT REQUIRED:
REPAIR PROCEDURE A:
1. Raise the vehicle on a suitable hoist. Refer to the detailed service procedures available in DealerCONNECT>Tech CONNECT>Service Info> 04 Vehicle Quick Reference> Hoisting> Standard Procedure> HOISTING.
2. Measure front hub runout, both left & right hubs. See DealerCONNECT>Tech CONNECT>Service Info>05 Brakes> Brakes, Base>Hydraulic/Mechanical>Rotor, Brake>Diagnosis & Testing>BRAKE ROTOR>ROTOR RUNOUT following steps 9 through 11.
3. Replace the right and/or left front steering knuckle with hub runout exceeding .040 mm. Refer to the detailed removal and installation procedures in DealerCONNECT>Tech CONNECT>Service Info>02 Front Suspension>Front>KNUCKLE, Steering>REMOVAL, and then INSTALLATION.
NOTE:
Be careful to not damage ABS sensor x-mas tree clip when removing from knuckle.
4. Reinstall front rotors. See DealerCONNECT>Tech CONNECT>Service Info>05 Brakes>Brakes, Base>Hydraulic/Mechanical>Rotor, Brake>Installation>Front Brake Rotor.
5. Perform alignment, see DealerCONNECT>Tech CONNECT>Service Info>02 - Front Suspension>Wheel Alignment>Standard Procedure>WHEEL ALIGNMENT.
6. Road test vehicle to verify sound issue is resolved, alignment is satisfactory, and that there is no roughness/vibration during braking. Was roughness/vibration evident?
a. Yes>>>Proceed Step # 7.
b. No>>>Proceed to Step # 8.
7. Is there a PSE Approved On-Car Brake Lathe (Hunter or Pro-Cut) available?
a. Yes>>> Resurface both front rotors using a PSE approved on-Car brake lathe.
b. No>>> Replace both front rotors. Refer to the detailed removal and installation procedures in DealerCONNECT>Tech CONNECT>Service Info>05 Brakes> Brakes, Base>Hydraulic/Mechanical>Rotor, Brake>Removal>FRONT BRAKE ROTOR, then Installation>FRONT BRAKE ROTOR.
NOTE:
Follow all resurfacing directions and procedures associated with the equipment used.
8. Return the vehicle to customer.
REPAIR PROCEDURE B:
1. Raise the vehicle on a suitable hoist. Refer to the detailed service procedures available in DealerCONNECT>Tech CONNECT>Service Info> 04 Vehicle Quick Reference> Hoisting> Standard Procedure> HOISTING.
2. Measure front hub runout, both left & right hubs. See DealerCONNECT>Tech CONNECT>Service lnfo>05 Brakes> Brakes, Base>Hydraulic/Mechanical>Rotor, Brake>Diagnosis & Testing>BRAKE ROTOR>ROTOR RUNOUT following steps 9 through 11.
3. Replace the right and/or left front steering knuckle with hub runout exceeding .040 mm. Refer to the detailed removal and installation procedures in DealerCONNECT>Tech CONNECT>Service Info>02 Front Suspension>Front>KNUCKLE, Steering>REMOVAL, and then INSTALLATION.
NOTE:
Be careful to not damage ABS sensor x-mas tree clip when removing from knuckle.
4. Is there a PSE Approved On-Car Brake Lathe (Hunter or Pro-Cut) available?
a. Yes>>> Reinstall front rotors. See DeaIerCONNECT>Tech CONNECT>Service lnfo>05 Brakes>Brakes, Base>Hydraulic/Mechanical>Rotor, Brake>lnstallation>Front Brake Rotor. Resurface both front rotors using a PSE approved on-Car brake lathe.
b. No>>> Replace both front rotors. Refer to the detailed removal and installation procedures in DealerCONNECT>Tech CONNECT>Service Info>05 Brakes> Brakes, Base>Hydraulic/Mechanical>Rotor, Brake>Removal>FRONT BRAKE ROTOR, then Installation>FRONT BRAKE ROTOR.
5. If one and/or both knuckles have been replaced perform alignment, see DealerCONNECT>Tech CONNECT>Service Info>02 - Front Suspension>Wheel Alignment>Standard Procedure>WHEEL ALIGNMENT.
6. Road test vehicle to verify roughness/vibration issue is resolved.
7. Return the vehicle to customer.
POLICY:
Reimbursable within the provisions of the warranty.
NOTE:
All expenses related to this repair, including rotor replace/resurface, should be charged to warranty under the 3136 Knuckle LOP 020530.
FAILURE CODE:
Disclaimer:
This bulletin is supplied as technical information only and is not an authorization for repair.