Idler Arm: Testing and Inspection

Idler Arm Inspection

Special Tools
* J 35999 Spring Scale
* J 42640 Steering Column Anti-Rotation Pin
* J 45101 Hub and Wheel Runout Gauge

1. Raise the vehicle on a hoist. Support the vehicle with jackstands. Refer to Lifting and Jacking the Vehicle (Service and Repair).





Caution: With wheels of the vehicle facing straight ahead, secure the steering wheel utilizing steering column anti-rotation pin, steering column lock, or a strap to prevent rotation. Locking of the steering column will prevent damage and a possible malfunction of the SIR system. The steering wheel must be secured in position before disconnecting the following components:

* The steering column
* The intermediate shaft(s)
* The steering gear

After disconnecting these components, do not rotate the steering wheel or move the front tires and wheels. Failure to follow this procedure may cause the SIR coil assembly to become un-centered and cause possible damage to the SIR coil. If you think the SIR coil has became un-centered, refer to your specific SIR coil's centering procedure to re-center SIR Coil.

2. Position the wheels in a straight-ahead position and install the J 42640.
3. Install the dial indicator J 45101 between the idler arm and vehicle frame.
Ensure the gauge is at zero before taking a measurement.




4. Place a J 35999 near the relay rod end of the idler arm.




5. Exert a 110 Nm (25 lb) force upward, and then downward while measuring the total distance the arm moves.




6. If movement exceeds 2 mm (0.078 in) replace the idler arm.




7. Install the dial indicator at the idler arm.
8. Push the tire inward slowly with one hand to remove any lash.
Zero out the dial indicator and pull outward in order to take a reading.




9. Allow only 1 mm (0.039 in) of movement at the idler arm ball stud.
If more than 1 mm exists, replace the idler arm.
10. Lower the vehicle.