Lexus ES: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
| Symptom | Suspected Area | Link |
|---|---|---|
| Low or spongy pedal | Fluid leaks in brake system | - |
| Air in brake system | | |
| Front brake piston seals (worn or damaged) | | |
| Rear brake piston seals (worn or damaged) | | |
| Brake master cylinder sub-assembly (faulty) | | |
| Brake booster push rod (adjustment necessary) | | |
| Parking brake actuator O-ring | | |
| Brake drag | Brake pedal free play (insufficient) | |
| Parking brake actuator | | |
| Front disc brake pad (cracked or distorted) | | |
| Rear disc brake pad (cracked or distorted) | | |
| Front brake piston (stuck) | | |
| Rear brake piston (stuck) | | |
| Front brake piston (seized) | | |
| Rear brake piston (seized) | | |
| Vacuum leaks in booster system | | |
| Brake master cylinder sub-assembly (faulty) | | |
| Brake booster push rod (adjustment necessary) | | |
| Brake pull | Front brake piston (stuck) | |
| Rear brake piston (stuck) | | |
| Front disc brake pad (oily) | | |
| Rear disc brake pad (oily) | | |
| Front brake piston (seized) | | |
| Rear brake piston (seized) | | |
| Front disc (scored) | | |
| Rear disc (scored) | | |
| Front disc brake pad (cracked or distorted) | | |
| Rear disc brake pad (cracked or distorted) | | |
| Hard pedal but braking inefficient | Fluid leaks in brake system | - |
| Air in brake system | | |
| Front disc brake pad (worn) | | |
| Rear disc brake pad (worn) | | |
| Front disc brake pad (cracked or distorted) | | |
| Rear disc brake pad (cracked or distorted) | | |
| Front disc brake pad (oily) | | |
| Rear disc brake pad (oily) | | |
| Front disc brake pad (glazed) | | |
| Rear disc brake pad (glazed) | | |
| Front disc (scored) | | |
| Rear disc (scored) | | |
| Vacuum leaks in booster system | | |
| Noise from brakes | Front disc brake pad (cracked or distorted) | |
| Rear disc brake pad (cracked or distorted) | | |
| Front disc brake cylinder mounting bolt (loose) | | |
| Rear disc brake cylinder mounting bolt (loose) | | |
| Front disc (scored) | | |
| Rear disc (scored) | | |
| Front disc brake pad support plate (loose) | | |
| Rear disc brake pad support plate (loose) | | |
| Front disc brake cylinder slide pin (worn) | | |
| Rear disc brake cylinder slide pin (worn) | | |
| Front disc brake pad (dirty) | | |
| Rear disc brake pad (dirty) | | |
| Front disc brake pad (glazed) | | |
| Rear disc brake pad (glazed) | | |
| Front brake anti-squeal shim (damaged) | | |
| Rear brake anti-squeal shim (damaged) | |
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READ NEXT:
On-vehicle Inspection
ON-VEHICLE INSPECTION CAUTION / NOTICE / HINT NOTICE: DTCs may be stored during the inspection procedure. Be sure to clear the DTCs and check that no DTCs are output after the inspection is finished.
Precaution
PRECAUTION CAUTION: While the auxiliary battery is connected, even if the power switch is off, the brake control system activates when the brake pedal is depressed or the door courtesy switch is turne
SEE MORE:
Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (a) Turn the engine switch off. (b) Connect the Techstream to the DLC3. (c) Turn the engine switch on (IG). (d) Turn the Techstream on. (e) Enter the following menus: Body Electrical / Tilt & Telescopic / Trouble Codes. Body Electrical > Tilt&Telescopic > Tr
Parts Location
PARTS LOCATION ILLUSTRATION *1 FRONT CORNER ULTRASONIC SENSOR RH *2 FRONT CENTER ULTRASONIC SENSOR RH *3 FRONT CENTER ULTRASONIC SENSOR LH *4 FRONT CORNER ULTRASONIC SENSOR LH *5 REAR CORNER ULTRASONIC SENSOR RH *6 REAR CENTER ULTRASONIC SENSOR RH *7 REAR CENTER U
