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7. Have an assistant start the vehicle.
8. Place the transmission in the highest forward gear.
9. Accelerate and decelerate the vehicle through the
speed range at which the vibration was first noted
during the Vibration Analysis - Road Testing
procedure.
10. If a vibration is present, note the J 38792-A reading
during acceleration or deceleration.
11. Note as to whether or not the pinion nose vibrates
under load during acceleration or deceleration.
Control Module References
Control Module
• "Diagnostic System Check - Vehicle Diagnostic Information"
• "Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Information"
• "DTC Symptom Description - Vehicle Diagnostic Information"
• "Symptoms - Vehicle Diagnostic Information"
Audio Amplifier
Auxiliary Blower Control
Module
Blower Control Module
Body Control Module
Digital Radio Receiver
Electronic Brake Control
Module (ABS)
Engine Control Module
Heated Seat Control Module
Inflatable Restraint
Passenger Presence
System
Inflatable Restraint Sensing
and Diagnostic Module
Inside Rearview Mirror
Instrument Panel Cluster
Radio
Rear Differential Clutch
Control Module
Schematic
"Radio/Navigation System
Schematics: "
"HVAC Schematics: "
"HVAC Schematics: "
"Body Control System
Schematics: "
"Radio/Navigation System
Schematics: "
"Antilock Brake System
Schematics: "
"Engine Controls
Schematics: "
"Heated/Cooled Seat
Schematics: "
"SIR Schematics: "
"SIR Schematics: "
"Inside Rearview Mirror
Schematics: "
"Instrument Cluster
Schematics: "
"Radio/Navigation System
Schematics: "
"All-Wheel Drive
Schematics: "
12. If the vibration is not reproduced, reinstall the brake
rotors and/or drums and the wheel/tire assemblies to
put an additional load on the system. Perform steps
7-11 and check the components again.
13. If the vibration is still not reproduced with rotors and/
or drums reinstalled, lightly apply the brakes to
further load the system while maintaining the
vibration concern speed.
14. If the pinion nose vibrates under acceleration or
deceleration, and other driveline components have
been eliminated as a cause, the vibration may be an
internal axle problem.
Repair Instruction
"Amplifier Replacement: "
"Auxiliary Blower Control
Module Replacement: "
"Blower Motor Control
Module Replacement: "
"Body Control Module
Replacement: "
"Digital Radio Receiver
Replacement: "
"Electronic Brake Control
Module Replacement: "
"Engine Control Module
Replacement: "
"Front Seat Heater Control
Module Replacement: "
"Inflatable Restraint
Passenger Presence
System Replacement -
Front: "
"Inflatable Restraint Sensing
and Diagnostic Module
Replacement: "
"Rearview Mirror
Replacement: "
"Instrument Cluster
Replacement: "
"Radio Replacement: "
"Rear Differential Clutch
Control Module
Replacement: "
General Information:
Programming and Setup
This device requires no
programming or setup
This device requires no
programming or setup
This device requires no
programming or setup
"Body Control Module
Programming and Setup: "
"Digital Radio Receiver
Setup: " after DRR
replacement
"Electronic Brake Control
Module Programming and
Setup: "
"Engine Control Module
Programming and Setup: "
"Service Programming
System (SPS)" after heated
seat control module
replacement
"Passenger Presence
System Programming and
Setup: "
"Inflatable Restraint Sensing
and Diagnostic Module
Programming and Setup: "
"Compass Calibration and
Magnetic Variance: " after
rear view mirror
replacement
"Instrument Cluster
Programming and Setup: "
"Radio Setup: " after radio
replacement
"Rear Differential Clutch
Control Module
Programming and Setup: "
0A-68
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Table of Contents
Troubleshooting
