The numbers below refer to the step numbers on the diagnostic table:
Lubricant leaks from non-brake system components may come in contact with and contaminate brake system components.
Lubricant leaks from non-brake system components may come in contact with and contaminate brake system components.
Disc brake rotor shields/backing plates that come in contact with disc brake rotors may cause brake system noise.
Step | Action | Yes | No | ||||||||
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DEFINITION: This diagnostic table is designed to diagnose ONLY the components of the DISC brake system in order to determine if the DISC brake system is operating properly. You will be directed by the appropriate Symptom table to go to other brake system diagnostic tables as appropriate. | |||||||||||
1 | Were you sent here from a Brake Symptom table? | Go to Step 2 | |||||||||
2 | Visually inspect the disc brake pads for the following conditions: Refer to Front Disc Brake Pads Replacement.
Did you find any conditions to indicate a concern with any of the front and/or rear disc brake pads? | Go to Step 3 | Go to Step 12 | ||||||||
3 | Are any of the front and/or rear disc brake pads contaminated? | Go to Step 8 | Go to Step 4 | ||||||||
4 | Are any of the front and/or rear disc brake pads worn unevenly? | Go to Step 7 | Go to Step 5 | ||||||||
5 | Are any of the front and/or rear disc brake pads and/or pad hardware loose or damaged? | Go to Step 7 | Go to Step 6 | ||||||||
6 |
Did you complete the inspection and replacement? | Go to Step 12 | -- | ||||||||
7 |
Notice: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is separated from its mount and the hydraulic flexible brake hose is still connected. Failure to support the caliper in this manner will cause the flexible brake hose to bear the weight of the caliper, which may cause damage to the brake hose and in turn may cause a brake fluid leak. Important: Do NOT disconnect the hydraulic brake flex hoses from the calipers. Refer to Front Disc Brake Mounting and Hardware Inspection and/or Rear Disc Brake Mounting and Hardware Inspection.
Did you complete the inspection and replacement? | Go to Step 12 | -- | ||||||||
8 |
Did you find and correct the source of the leak causing contamination of the pads? | Go to Step 11 | Go to Step 9 | ||||||||
Did you find and correct the source of the leak causing contamination of the pads? | Go to Step 11 | Go to Step 10 | |||||||||
Did you find and correct the source of the leak causing contamination of the pads? | Go to Step 11 | -- | |||||||||
11 |
Notice: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is separated from its mount and the hydraulic flexible brake hose is still connected. Failure to support the caliper in this manner will cause the flexible brake hose to bear the weight of the caliper, which may cause damage to the brake hose and in turn may cause a brake fluid leak. Important: Do NOT disconnect the hydraulic brake flex hoses from the calipers. Refer to Front Disc Brake Mounting and Hardware Inspection and/or Rear Disc Brake Mounting and Hardware Inspection .
Did you complete the cleaning, inspection and replacement? | Go to Step 12 | -- | ||||||||
Visually inspect each of the disc brake rotor shields/backing plates, if equipped, for evidence of contact with the brake rotors. Are any of the brake rotor shields/backing plates contacting the brake rotors? | Go to Step 13 | Go to Step 14 | |||||||||
13 | Repair or replace the disc brake rotor shields/backing plates as required. Refer to Front Brake Shield Replacement and/or Rear Parking Brake Anchor Backing Plate Replacement. Did you complete the repair or replacement? | Go to Step 14 | -- | ||||||||
14 |
Important: Make the following determination AND ANSWER the question INDIVIDUALLY for EACH rotor. Refer to Brake Rotor Thickness Measurement. Does the disc brake rotor meet the minimum requirements for REFINISHING? | Go to Step 15 | Go to Step 18 | ||||||||
Important: Perform the following inspection AND ANSWER the question INDIVIDUALLY for EACH rotor. Inspect each of the disc brake rotors for thickness variation that exceeds the maximum acceptable level. Refer to Brake Rotor Thickness Variation Measurement. Does the brake rotor exhibit thickness variation that exceeds the maximum acceptable level? | Go to Step 17 | Go to Step 16 | |||||||||
16 |
Refer to Brake Rotor Surface and Wear Inspection .
Important: Make the following determination AND ANSWER the question INDIVIDUALLY for EACH rotor. If the brake rotor exhibits any of the conditions listed previously, it requires refinishing. Does the brake rotor require REFINISHING? | Go to Step 17 | Go to Step 22 | ||||||||
17 |
Were you able to REFINISH the brake rotor within the minimum requirements? | Go to Step 22 | Go to Step 21 | ||||||||
18 | Is the brake rotor at or below the MINIMUM THICKNESS requirements? | Go to Step 21 | Go to Step 19 | ||||||||
Important: Perform the following inspection AND ANSWER the question INDIVIDUALLY for EACH rotor. Inspect each of the disc brake rotors for thickness variation that exceeds the maximum acceptable level. Refer to Brake Rotor Thickness Variation Measurement. Does the brake rotor exhibit thickness variation that exceeds the maximum acceptable level? | Go to Step 21 | Go to Step 20 | |||||||||
20 |
Refer to Brake Rotor Surface and Wear Inspection.
Important: Make the following determination AND ANSWER the question INDIVIDUALLY for EACH rotor. If the brake rotor exhibits any of the conditions listed previously, it requires replacement. Does the brake rotor require REPLACEMENT? | Go to Step 21 | Go to Step 22 | ||||||||
21 |
Important: Whenever a brake rotor is replaced, the assembled lateral runout (LRO) of the rotor must be measured to ensure optimum performance of the disc brakes. Replace the brake rotor. Refer to Front Brake Rotor Replacement or Rear Brake Rotor Replacement. Did you complete the replacement? | Go to Step 24 | -- | ||||||||
Important: Perform the following inspection AND ANSWER the question INDIVIDUALLY for EACH rotor. Inspect each of the disc brake rotors for assembled lateral runout (LRO) that exceeds the maximum acceptable level. Refer to Brake Rotor Assembled Lateral Runout Measurement . Does the brake rotor exhibit assembled LRO that exceeds the maximum acceptable level? | Go to Step 23 | Go to Step 24 | |||||||||
23 | Correct the LRO for each brake rotor that was determined to have LRO exceeding the maximum acceptable level. Refer to Brake Rotor Assembled Lateral Runout Correction. Did you complete the operation? | Go to Step 24 | -- | ||||||||
24 | Install or connect components that were removed or disconnected during diagnosis. Did you complete the operation? | Disc Brake System OK Return to Symptom Table | -- |