TSB200094-042320

4/29/2020
New VGT Actuator for Transit Buses in North America and Europe for Fault Code 1894, 1897, 2449, 2634, 2634, or 2636
Technical Service Bulletin
Technical Service Bulletin: TSB200094
Released Date: 23-Apr-2020
New VGT Actuator for Transit Buses in North America and Europe for Fault Code
1894, 1897, 2449, 2634, 2634, or 2636
New VGT Actuator for Transit Buses in North
America and Europe for Fault Code 1894, 1897,
2449, 2634, 2634, or 2636
Warranty Statement
The information in this document has no effect on present warranty coverage or repair practices,
nor does it authorize TRP or Campaign actions.
Contents
Product Affected
B6.7 CM2350 B121B
B6.7 CM2350 B135B
B6.7 CM2350 B148B
ISB6.7 CM2350 B101
ISB6.7 CM2350 B103
ISB6.7 CM2350 B142
L9 CM2350 L116B
L9 CM2350 L119B
L9 CM2350 L123B
ISL9 CM2350 L101
ISL9 CM2350 L111
Applications:
24 volt applications only
Issue
Symptom:
Intermittent loss of communication between VGT actuator and engine ECM at nominal voltage
of 24-volt for 24-volt applications at early key-on of engine.
Fault Codes: 1894, 1897, 2449, 2634, 2634, or 2636 will be present
Root Cause:
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4/29/2020
New VGT Actuator for Transit Buses in North America and Europe for Fault Code 1894, 1897, 2449, 2634, 2634, or 2636
Transit bus duty cycles cause excessive heating in the electrolytic capacitor of VGT actuator,
resulting in no communication fault codes from the engine control module (ECM).
Verification
Verify Fault Codes: 1894, 1897, 2449, 2634, 2634, or 2636 is present.
Resolution
Replace VGT actuator with the corresponding new part number in Table 1 below if reuse
conditions are not met or published troubleshooting has indicated the actuator has
malfunctioned. See corresponding Service Manual. Reference 010-034 Section 10.
The electrolytic capacitor in the VGT actuator is being replaced with a dry capacitor which
does not have electrolytic fluid. The dry capacitor will reduce malfunction rate and will not
impact the customer interface with the turbocharger actuator or the turbocharger.
Service Parts Availability
Service parts are available. See Table 1 for part numbers.
Table 1, Service Parts
Part
Description
Existing
Part Number
Obsolete
Superseded
New Part
Number
Application
Kit,
Turbocharger
Actuator
5496046
Yes
Yes
5603776
Transit Bus
5608235
Option
PP90388
Only
5608236
Option
PP90389
Only
Kit,
Turbocharger
Kit,
Turbocharger
5328119
5328120
Yes
Yes
Yes
Yes
Part Inventory Action
Use existing part number inventory before using the new part number.
Document History
Date
2020-4-20
Details
Module Created
Last Modified: 23-Apr-2020
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