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Title: Next Gen CE Bus Entrance Door Troubleshooting Tips

Applies To: Next Gen CE Bus

CHANGE LOG

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

109/1 5/2025 - update torque value for set screw 4586323c2

106/20/2025 - updated diagrams, door stop info, added info on air controls
101/15/2025 - Updated Air pressure setting

"01/10/2025 - Initial Article Release

DESCRIPTION

Countries:
Avallabllity:

Major System: BUS BODY
Current Language: English
Other Languages: NONE

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Revision:
Created:

CANADA, UNITED STATES Document ID: 1K2200156
ISIS, Bus ISIS, IsSIR

3
9/3/2024

Last Modified: 9/15/2025

Author:

Brandon Akridge

Not Helpful

This document provides guidance for troubleshooting issues with the entrance door of Next Gen CE Bus. While the primary focus is on achieving a
properly adjusted latching entrance door, it also includes additional helpful tips. Please note that this document is not exhaustive and only
addresses some common issues and their resolutions. For more detailed information, refer to Service Manual 0001283373. If this article or the
Service Manual does not cover the topic, please create a case file for more specific assistance.

SYMPTOM(s)

Symptoms covered in this article:
Door latching issues with Bus
Door is closed, but the dash shows open

Door is closed, but the step/dome lights are still on
Door is closed, but PTI (Post Trip Inspection) is not disengaging

Door latching issues with Bus Off
¢ Doors will not latch

e One or both doors do not open or close as before
e The motor is making abnormal noises

Exterior release issues

e Electric Door not closing

e Electric Door not opening

e Air Door does not dump air
Air door functionality

e Closes too fast

e Closes too slow
¢ Doors hit body

SPECIAL TOOL(s) / SOFTWARE

Red PWL (Pupil Warning Lights) activate skipping the Amber lights when the flasher system starts
N/A

SERVICE PARTS INFORMATION

Kit Description Part Number Required Notes

Set Screw, 1/4-20 Unc Thread lock 4586323c1 2 with partial red thread lock patch
Set Screw, 1/4-20 Unc Thread lock 4586323c2 2 with full blue thread lock patch
Actuator, Fwd Entr Door Motor, w/Slip Clutch 4640535c1 1

Actuator, Rear Entr Door Motor, w/Slip Clutch 4640536c1 1

To prevent personal injury and/or death, or property damage, park the vehicle

on a hard flat surface, turn the engine off, set the parking brake, and install
wheel chocks to prevent the vehicle from moving in both directions.

To prevent personal injury and/or death, always wear safe eye protection
when performing vehicle maintenance

DIAGNOSTIC STEP(s)

See below for additional information on each specific topic.

Door Latching issues with Bus

Under normal operating conditions, each door will have two audible clicks when properly latched, this a 2 stage latch design similar to most
personal vehicles door latches. When checking manually, the force required to latch is