PIT5832A

Bulletin No.: PIT5832A
Published date: 01/26/2022
Preliminary Information
PIT5832A Diagnostic Tip: No Start Or Unable To Perform Theft
Relearn After Replacing Or Programming A Module / DTC U1962
Models
Brand:
Model:
Model Years:
VIN:
from
to
Engine:
Transmissions:
Buick
Envision
2021 - 2022
All
All
All
All
Cadillac
CT4
2020 - 2022
All
All
All
All
Cadillac
CT5
2020 - 2022
All
All
All
All
Cadillac
Escalade Models
2021 - 2022
All
All
All
All
Chevrolet
Corvette
2020 - 2022
All
All
All
All
Chevrolet
Suburban
2021 - 2022
All
All
All
All
Chevrolet
Tahoe
2021 - 2022
All
All
All
All
GMC
Yukon Models
2021 - 2022
All
All
All
All
GMC
HUMMER EV
2022
All
All
All
All
Involved Region or Country North America
Some technicians may experience one or more of the following concerns after
replacing or reprogramming a module on one of the new Vehicle Intelligence
Platforms. or VIP Vehicles
Condition
1. DTC: U1962 set current in ANY Module
2. No Start
3. Invalid Data codes with certain modules even through you can still review the
data with GDS2
4. Unable to perform a theft relearn or learn remotes back to the vehicle
5. Unable to perform Module setup or learn
6. You may also notice that the VIN number will not self-populate in GDS2
The serial Data Authentication Con guration procedure runs automatically as part of
the programming procedure.
Cause
The Serial Data Authentication Con guration is a security handshake between all the
modules on the vehicle. One of the main indicators the Serial Data Authentication
Con guration did not complete properly is DTC: U1962 is current in one or more
modules.
See Example below:
Correction:
The dealer will need to perform the Serial Data Authentication Con guration (SDAC) following Instructions in SI using
Document ID: 5404959. Be sure the vehicle is Power Moded to the OFF position before running the Serial Data
Authentication Con guration procedure.
If a vehicle will not complete the Serial Data Authentication Con guration (SDAC) after updating or replacing a
module, please perform the following:
1. If a module was replaced, make sure the new module was SPS programmed correctly or the SDAC will fail and
not complete correctly.
2. If a module such as the BCM is replaced, and the immobilizer learn needs to be completed after replacement,
the tech needs to make sure that the SDAC completes correctly, or a pop-up message like the one below will
be displayed:
3. If a vehicle will not complete the SDAC, run the SDAC (using the Serial Data Authentication selection in Techline
Connect) again. Select the box in SPS controller list in the lower right-hand corner labeled "Serial Data
Authentication Con guration".
4. The SDAC will run 3 times before it fails. When it fails, there should be a pop box that shows up on the screen
like the one below. Check and record the items listed under System and ECU. If the system box reads "Server"
then the issue is related to the SPS system server or internet connection and not related to the vehicle.
Attempt the SDAC again at a later time.
5. If the system box reads "ECU", then the Global ID of the module that is causing the concern should be able to
be obtained. In the example below, the Global ID is listed as K36, which is for the SDM. The module's name
can be found by looking at the global codes listed under "Control Module References" document in SI for the
vehicle that is being working on.
6. Sometimes the pop-up box will read "ECU" but it will not give you a Module ID in the ECU box. In this case, the
servicing dealer will have to contact Techline support and they will have to assist by getting a SPS log le from
the dealership's system. If this is the case, they must be contacted right after the SDAC failure. If any other
programming is attempted before contacting Techline, then the SPS log will be erased.
7. Once the module that caused the concern has been identi ed, pull the fuse that supplies battery power to
that module. Sometimes the fuse is a three-prong fuse that feeds other modules. In this case, the servicing
technician will need to nd a two-prong fuse to power the other module that was not involved in the SDAC
failure.
8. If the SDAC completes after removing battery power from the module in question, that module will need to be
replaced. Afterwards, verify that the SDAC completes after SPS programming of the new module.
Version History
Version
Modi ed
2
04/06/2021 - Created on
01/26/2022 - Update to add models and model years and to added to
diagnosis.
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