USP102112

Service Bulletin Details

Public Details for: USP102112
Mack defense-idtc_vcb_sch
Models from 9999
DTC:
Bulletin:
P1021-12
GDC22-201
Date:
Description:
Applies to:
April 01, 2022
See below for fault code description(s)
US ARMY VEHICLES
General Information
These repair instructions are intended to address the following fault(s):
DTC
P1021-12
Description
IDTC_VCB_SCH –
Voltage Above Normal
or Shorted High
Possible (Observable)
Symptoms
Possible Cause
•
•
•
•
Connector
Wiring harness
Short circuit in the compression
brake solenoid valve
Engine control module (ECM)
•
Reduced engine braking
since the compression brake
cannot be activated
Required Parts
Part Number
Description
Quantity
N/A
PTT, VOCOMII
1
Repair Instructions
Please reference the following file(s):
•
•
IETM, WP File Name: T00986
IETM, WP Number: 219
Additional Resources
•
For support with a warrantable fault/fault code, please submit an SF368 Product Quality Deficiency Report
(PQDR) in the Product Data Reporting & Evaluation Program (PDERP) at https://www.pdrep.csd.disa.mil/
and CC or forward the PDREP generated .pdf copy of the SF368 to appropriate Mack Defense Warranty
Managers:
Margaret Baranowski
(484)-743-7127
[email protected]
William Beard
(610)-573-4954
[email protected]
© 2022 Mack Trucks, Inc. Information is subject to change without notice.
Page 1/2
DTC:
P1021-12
Bulletin:
Date:
•
GDC22-201
April 01, 2022
For assistance with normal service or technical related questions, please contact our Contractor Logistics
Support (CLS) provider POCs:
Rich Rader
(910) 797-0903
[email protected]
Gil Esplana
(254) 404-5409
[email protected]
© 2022 Mack Trucks, Inc. Information is subject to change without notice.
Page 2/2