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IK0500061 - CE Bus Steering Won't Return to Center
Repair Tips

IK0500061 - CE Bus Steering Won't Return to Center

oemdtc August 6, 2019 No Comments

NHTSA ID Number: 10164502

Manufacturer Communication Number: K0500061

Summary

CE Bus Steering Returnability Diagnostics. Only CE buses built during 1/29/2018 thru 6/11/2019 with Tilt Columns, ESP, and Steering Switch Controls. 2019 and 2020 Model year only

 

2 Affected Products

Vehicle

MAKE MODEL YEAR
IC BUS CE 2019-2020

DESCRIPTION

This document will guide the user through diagnosing steering wheels not returning to center without assistance on IC CE Buses.

This document only applies to CE buses built during 1/29/2018 thru 6/11/2019 with the following feature codes:

Tilt Column: 0005708 (Column part number 4095815C91 (Bendix) or 4110141C91 (Wabco))

ABS with ESP: 0004AZS (Bendix air system) or 0004JNX (Wabco hyd. system) Steering wheel Switch: 0047DNK or 0047DNU or 0047DWC

 

SYMPTOM(s)

Diagnostic Trouble Code(s) & Dashboard Indicator Light(s):

There are no fault codes associated with this failure mode.

Customer Observations or Concerns:

The customer may notice that the vehicle may have reduced return-ability without some assistance or the steering wheel may not fully return to "on center position" after a turn without some assistance.

Note: Return-ability definition - The feel and predictability of the steering system’s center return.  Steering should return towards "on center" smoothly and quickly without any binding.

 

Possible Causes of low return-ability:

Low Steering Axle Caster

Binding Kingpins

Binding Draglink Ends

Binding Tie Rod Ends

Binding Steering Gear

Binding Steering Shaft U­joints/Slip Joint

Binding Steering Column

 


Countries: CANADA, UNITED STATES,

Document ID: IK0500061

Availability: ISIS, Bus ISIS, FleetISIS, IsSIR Revision: 2
Major System: STEERING SYSTEM Created: 5/23/2019

Current Language:

English Last
Modified:

8/19/2019

Other Languages: NONE Author: David

Viewed: 425

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Title: CE Bus Steering Returnability Diagnostics
Applies To: CE Bus w/ Tilt Columns, ESP, and Steering Switch Controls

CHANGE LOG
Please refer to the change log text box below for recent changes to this article:

09/05/2019 ­ Added repair instructions and part numbers, updated author for feedback
08/19/2019 - Added production build date break
05/30/2019 - Initial Article Release


DESCRIPTION
This document will guide the user through diagnosing steering wheels not returning to center
without assistance on IC CE Buses.

This document only applies to CE buses built during 1/29/2018 thru 6/11/2019 with the following
feature codes:

ï Tilt Column: 0005708 (Column part number 4095815C91 (Bendix) or 4110141C91 (Wabco)) ï ABS with
ESP: 0004AZS (Bendix air system) or 0004JNX (Wabco hyd. system)
ï Steering wheel Switch: 0047DNK or 0047DNU or 0047DWC
SYMPTOM(s)
Diagnostic Trouble Code(s) & Dashboard Indicator Light(s):

There are no fault codes associated with this failure mode.

Customer Observations or Concerns:

The customer may notice that the vehicle may have reduced return-ability without some assistance or
the steering wheel may not
fully return to "on center position" after a turn without some assistance.

Note: Return-ability definition - The feel and predictability of the steering system's center
return. Steering should return towards
"on center" smoothly and quickly without any binding.

SPECIAL TOOL(s) / SOFTWARE

Tool Description Tool Number Comments
Instructions

Steering Wheel Puller 05-252-01
TL2900050

SERVICE PARTS INFORMATION

Kit Description Part Number Quantity Required

Notes

Modified Bare Steering Wheel Kit 6100132C91 1 5mm of material removed
from the
hub. No cover, wiring or switche

DIAGNOSTIC STEP(s)

Always wear safe eye protection when performing vehicle maintenance. Failure to do so
may result in personal injury and / or death.

Park vehicle on a hard, flat surface, turn the engine off, set the parking brake, and block the
wheels to prevent the vehicle from moving in either direction. Failure to do so may result in
property damage, personal injury, and / or death.

The return-ability procedure should be performed on a flat paved surface where greater
than a full lock turn can be performed safely.

Possible Causes of low return-ability:
ï Low Steering Axle Caster ï Binding Kingpins
ï Binding Draglink Ends ï Binding Tie Rod Ends ï Binding Steering Gear
ï Binding Steering Shaft U­joints/Slip Joint
ï Binding Steering Column

Step Action
Decision

DIAGNOSTIC:

Determine the vehicles returnability of the steering.

This procedure should be performed on a flat paved surface where greater than
a full lock turn can be performed safely.

From a full stop, turn the wheel to full lock. Take hands off the steering wheel and start to
accelerate gradually, the vehicle should be making a circle. Increase the vehicle speed to no more
than 20mph without hands on the wheel. Repeat
the test for both left and right turns.
1
Does the steering return in both directions to within 180 degrees or 1/2 turn of straight before
the bus completes two full circles with smooth and predictable steering movement?

Yes. No additional actions are needed

No. Proceed to step 2.

Step Action
Decision

DIAGNOSTIC:

Inspect for clockspring to steering wheel interference.

Remove the steering wheel and remove the clockspring.

Without reinstalling the clockspring, install the steering wheel, torque the steering
wheel nut to 55-60ft-lbs.

With the clockspring removed repeat the return-ability test in step 1.

Yes. Replace the steering wheel per the
repair solution below.

No. Reinstall the clockspring. Check
alignment, then diagnose
potential binding in the steering gear,

2 Does the steering return in both directions to within 180 degrees or 1/2 turn kingpins,
draglink/tie rod ends, or

of straight before the bus completes two full circles with smooth and
predictable steering movement?

steering shaft.

Figure 1: Steering column cut-a-way view

Figure 2: Steering column and steering wheel with covers removed for visual

REPAIR STEP(s)

Park vehicle on a hard, flat surface, turn the engine off, set the parking brake, and block the
wheels to prevent the vehicle from moving in either direction. Failure to do so may result in
property damage, personal injury, and / or death.

Always wear safe eye protection when performing vehicle maintenance. Failure to do so
may result in personal injury and / or death.

If the vehicle must be raised, do not work under the vehicle supported only by jacks. Jacks can
slip or fall over, potentially resulting in property damage, personal injury, and / or death.

 

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Step 1. Remove original steering wheel, it is to be replaced with part number 6100132C91.
Step 2. Transfer over steering wheel cover, switches, wiring harness, and horn cover retention
springs to the new wheel and
reinstall the clockspring that was previously removed.

Step 3. Install the new steering wheel and torque the to 55-60 fl-lbs.

Step 4. Validate repair by repeating returnability test in diagnostic step 1.

WARRANTY INFORMATION
Warranty Claim Coding:
Refer to the Warranty Coding Manual for Group and Noun Codes.

Standard Repair Time(s):
Refer to the SRT Manual for Repair Times

OTHER RESOURCES
Master Service Information Site


Document ID: IK0500061

Revision: 2

Last Modified: 8/19/2019

https://www.nhtsa.gov/recalls?nhtsaId=10164502

https://static.nhtsa.gov/odi/tsbs/2019/MC-10164502-0001.pdf

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Document ID: IK0500061

Revision: 0

Last Modified: 6/5/2019

https://www.nhtsa.gov/recalls?nhtsaId=10162032

https://static.nhtsa.gov/odi/tsbs/2019/MC-10162032-0001.pdf

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