For 1990-2009 cars

Table 1: | Vibration Symptoms that are Felt
Table 2: | Vibration Symptoms that are Heard

Important: Perform the following steps in sequence BEFORE using these symptom tables.

1. Begin the diagnosis of vibration concern by reviewing Diagnostic Starting Point - Vibration Diagnosis and Correction to be familiar with the correct diagnostic procedures.
2. Perform the Vibration Analysis - Road Testing before using these symptom tables to duplicate and effectively diagnose the customer's concern.

### Symptom Tables

Refer to a Vibration Analysis table as indicated in the following symptom tables, based on the most dominant characteristics of the customer's vibration concern, felt or heard, under the appropriate occurrence condition.

#### Vibration Symptoms that are Felt

Type | Description | Typical Frequency Range | Condition of Occurrence | Area of Focus
--- | --- | --- | --- | ---
Shake | Can sometimes be seen or felt in the steering wheel, seat or console. Relative Terms: shimmy, wobble, waddle, shudder, hop | 5-20 Hz | Vehicle Speed Sensitive Still occurs during coast down in NEUTRAL | Go to Vibration Analysis - Tire and Wheel
Vehicle Speed Sensitive Affected by torque/load/or steering input | Go to Vibration Analysis - Hub and/or Axle Input
Engine Speed Sensitive | Go to Vibration Analysis - Engine
Roughness | Similar to the feeling of holding a jigsaw | 20-50 Hz | Vehicle Speed Sensitive Still occurs during coast down in NEUTRAL | Go to Vibration Analysis - Tire and Wheel
Engine Speed Sensitive | Go to Vibration Analysis - Engine
Vehicle Speed Sensitive Affected by torque/load/or steering input | Go to Vibration Analysis - Hub and/or Axle Input
Buzz | Similar to the feeling of holding an electric razor May be felt through handing the steering wheel, stepping on the vehicle floor, or sitting on the seat. | 50-100 Hz | Vehicle Speed Sensitive Affected by torque/load/or steering input | Go to Vibration Analysis - Hub and/or Axle Input
Engine Speed Sensitive | Go to Vibration Analysis - Engine
Tingling | May produce a "pins and needles" sensation or may put hands or feet "to sleep" Highest vibration frequency range can still be felt. | Greater than 100 Hz | Vehicle Speed Sensitive Affected by torque/load/or steering input | Go to Vibration Analysis - Hub and/or Axle Input
Engine Speed Sensitive | Go to Vibration Analysis - Engine

#### Vibration Symptoms that are Heard

Type | Description | Typical Frequency Range | Condition of Occurrence | Area of Focus
--- | --- | --- | --- | ---
Boom | The interior noise usually heard similar to the noise of a bowling ball rolling down an alley, deep thunder, or a bass drum

• | Relative Terms - droning, growling, moaning, roaring, rumbling, humming

• | May not be accompanied by a perceptible vibration (roughness)

20-60 Hz

Vehicle Speed Sensitive

Still occurs during coast down in NEUTRAL

Go to Vibration Analysis - Tire and Wheel

Vehicle Speed Sensitive Affected by torque/load/or steering input | Go to Vibration Analysis - Hub and/or Axle Input
Moan or Droan | Similar to the sound of a bumblebee or blowing air across the top of a bottle

• | Relative Terms - humming, buzzing, resonance

• | May be accompanied by a perceptible vibration (buzz)

60-120 Hz

Vehicle Speed Sensitive

Affected by torque/load/or steering input

Go to Vibration Analysis - Hub and/or Axle Input

Engine Speed Sensitive | Go to Vibration Analysis - Engine
Howl | Similar to the sound of the wind howling | 120-300 Hz | Vehicle Speed Sensitive Affected by torque/load/or steering input | Go to Vibration Analysis - Hub and/or Axle Input
Engine Speed Sensitive | Go to Vibration Analysis - Engine
Whine | Similar to the sound of mosquitoes, turbine engines, or vacuum cleaners | 300-500 Hz | Vehicle Speed Sensitive Affected by torque/load | Go to Diagnostic Starting Point - Automatic Transmission