Table of Contents
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4A-11 Brake Control System and Diagnosis:
Brake Pulsation
Test Description
The numbers below refers to the step numbers on the diagnostic table:
2.
Suspension components that are not operating properly may cause a disturbance to the vehicle during application of
the brake system.
3.
Antilock brake system operation could produce feedback through the brake pedal during application of the brake
system.
Step
Were you sent here from the Hydraulic Brake Symptom table?
1
Inspect the suspension system for proper operation. Refer to
2
"Diagnostic Starting Point - Suspension General Diagnosis: ".
Did you find and correct a condition?
Inspect the antilock brake system, if equipped, for proper
operation. Refer to "Diagnostic Starting Point - Antilock Brake
3
System: ".
Did you find and correct a condition?
Inspect the disc brake system for proper operation. Refer to
4
"Disc Brake System Diagnosis: ".
Did you find and correct a condition?
Inspect the hydraulic brake system for proper operation. Refer
5
to "Hydraulic Brake System Diagnosis".
Did you find and correct a condition?
Road test the vehicle in order to confirm proper operation.
6
Refer to "Brake System Vehicle Road Test".
Is the condition still present?
Brake System Noise
Step
Were you sent here from the Hydraulic Brake Symptom table?
1
Inspect the disc brake system for proper operation. Refer to
2
"Disc Brake System Diagnosis: ".
Did you find and correct a condition?
Inspect the brake assist system for proper operation. Refer to
3
"Brake Assist System Diagnosis: ".
Did you find and correct a condition?
Inspect the hydraulic brake system for proper operation. Refer
4
to "Hydraulic Brake System Diagnosis".
Did you find and correct a condition?
Is the vehicle equipped with a drum-in-rotor type of park brake
5
system?
Ensure the park brake shoes are not adjusted too tightly,
6
possibly causing a noise under certain conditions.
Are the park brake shoes adjusted too tightly?
1. Clean and inspect the park brake shoes for excessive
wear and/or damage.
2. Inspect the drum portion of the rotors for excessive wear,
blueing discoloration, heat spots, and excessive radial
runout.
7
3. If any of these conditions are present, replace the affected
components.
4. Adjust the park brake system.
Did you find and correct a condition?
Action
Action
Yes
Go to "Diagnostic
Go to Step 2
Starting Point -
Hydraulic Brakes"
Go to Step 6
Go to Step 3
Go to Step 6
Go to Step 4
Go to Step 6
Go to Step 5
Go to "Diagnostic
Go to Step 6
Starting Point -
Hydraulic Brakes"
Go to Step 2
System OK
Yes
Go to "Diagnostic
Go to Step 2
Starting Point -
Hydraulic Brakes"
Go to Step 9
Go to Step 3
Go to Step 9
Go to Step 4
Go to Step 9
Go to Step 5
Go to Step 6
Go to Step 8
Go to Step 7
Go to Step 8
Go to Step 9
Go to Step 8
No
No
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Table of Contents
Troubleshooting
