Ascender 4WD L6-4.2L (2003)
Gear Sensor/Switch: All Technical Service Bulletins
4X4 System - Binding/Crow Hop Sensation on Turns
TSB SB04-05-S005
Shudder, Rocking Motion, Binding, Feels Like Vehicle is Stuck in
4WD (Crow Hop) When Turning at Low Speeds
ISSUE DATE: MAY 2004
Affected Vehicles
2003 Isuzu Ascender models equipped with 4WD.
Service Information
Condition:
Some customers may comment that when turning, the vehicle feels like it is binding, or the vehicle feels like it is stuck in 4WD (crow hop), or that the
4WD system is not working correctly, a shudder type sensation is felt.
Possible Cause:
This intermittent condition may be difficult to duplicate, the potential is only present in the Auto Mode of the transfer case.
Correction:
Replace the Transfer Case Encoder (Sensor) and reprogram TCCM. DO NOT REPLACE THE TRANSFER CASE MOTOR.
Service Procedure
NOTE:
It is extremely important to check all of the tires before repairs are attempted for these types of customer concerns. Mismatched tires may cause these
types of customer concerns. Inspect the tires in the following areas.
1.
Ensure that the tires are inflated to the recommended tire pressure as listed on the tire placard on the driver's door.
2.
Use a tire tread depth gauge to determine the tread depth. The tire tread depth must be nearly equal on all four corners of the vehicle.
3.
Ensure that the tires are all the same brand, size, and tread design.
1.
Place the 4WD selector switch in the 2 HI position.
2.
Raise the vehicle.