Pinpoint Test AE-1: Noise - During Acceleration Or Deceleration Which May Occur With Braking

Normal Operation and Fault Conditions 

Description 

• Noises when accelerating or decelerating involve parts which move during an acceleration tip-in (pressing foot on gas pedal) or parts which move during deceleration tip-out (when taking foot off gas pedal). These noises are not typically associated with the steering gear.

Pinpoint Test Applicability 

• This test applies to the following diagnostic concerns:
• Noises occurring during acceleration or deceleration which may occur with braking

This test DOES NOT apply to any other DTC or symptom.

Diagnostic Strategy 

• To visually check for obvious parts that may be damaged within parts that are in motion during this drive event, followed up by Chassis Ears usage to further define where the noise source may be while steering (turning the steering wheel) during this drive event.

Pinpoint Test Purpose 

• To search for the components contributing to steering noises during this drive event and determine if the resulting components are defective or the noise is a normally occurring noise for this vehicle type.

Possible Sources 

• Steering shaft slip joints or lower input shaft (requires lubrication)
• Roll restrictor
• Powertrain mounts
• Exhaust heat shield (tinny rattle)
• Exhaust isolators and brackets
• Subframe mounts
• Engine to chassis wiring, tubes, brackets (loose or out of position)
• Halfshafts (if equipped)
• Mid- shaft bearing (right hand halfshaft)

Pinpoint Tests AE: Front End Noise - During Acceleration (Tip-In) Or Deceleration (Tip-Out)