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NHTSA ID Number: 10163235
Manufacturer Communication Number: 19NA079
Summary
This technical bulletin provides repair information to correct a customer concern of a Propulsion Power is Reduced message displayed in the DIC and without DTCs set on higher mileage vehicles by reprogramming the HPCM 2.
5 Affected Products
Vehicles
MAKE | MODEL | YEAR |
CADILLAC | ELR | 2014-2015 |
CHEVROLET | VOLT | 2013-2015 |
SEOCONTENT-START
Service Bulletin Bulletin No.: 19-NA-079
Date: June, 2019
TECHNICAL
Subject: Propulsion Power is Reduced without DTCs on Higher Mileage Vehicles
Brand: Model:
Model Year: VIN:
Engine: Transmission:
from to from to
Cadillac ELR 2014
2015 1.4L (LUU)
4ET50
Automatic
(MKA)
Chevrolet Volt
Opel / 2013
Vauxhall Ampera
Holden Volt
Involved Region or Country North America, Australia, Europe
Condition
Some customers may comment on a Propulsion Power is Reduced message displayed in
the Driver Information Center (DIC) that was not present under the same driving
conditions previously. They may also state the engine speed was very high at the time of
the message or that the engine compartment had a hot smell.
Cause
• When the Hybrid/EV Battery Pack becomes discharged beyond expected limits, the
system will enter a Reduced Power Mode until the Hybrid/EV Battery Pack state of
charge recovers by using aggressive engine charging.
• This may be caused by a controls issue with normal wear of the Hybrid/EV Battery
Pack. Apply the Correction below.
• This may also be caused by the driver not properly using the Mountain Mode feature
when the vehicle is climbing steep, hilly or mountainous grades. The Condition may
remain until the Hybrid/EV Battery Pack state of charge has recovered.
If the customer has experienced this condition, refer them to their > Owner Manual >
Driving and Operating > Electric Vehicle Operating Modes > Driver Selected
Operating Modes > Mountain Mode regarding proper set up and use. The new
reprogramming software will not improve this experience.
• This may also be caused by extreme cold outside ambient temperatures. The
Condition may remain until the Hybrid/EV Battery Pack temperature has recovered
and stabilized. Advise the customer this could be normal vehicle behavior in extreme
cold. Plug in the vehicle to keep the Hybrid/EV Battery Pack warm during the coldest
days of the year. The new reprogramming software will not improve this experience.
Correction Perform the Service Procedure.
Service Procedure
The Correction for this Condition is the same Hybrid
Powertrain Control Module 2 Programming and Setup
with SPS procedure as identified in Campaign
#N172130462 – Customer Satisfaction Program –
Loss of Propulsion Due to Low Cell Voltage.
⇒ If #N172130462 is still “Open” in IVH, then perform
the Campaign. Refer to the Campaign bulletin for
instructions.
⇒ If #N172130462 has been “Closed” and the
customer is still experiencing the Condition, contact
the GM Technical Assistance Center (TAC) for
guidance.
Important: For this concern, after programming the
HPCM2, perform the Hybrid / EV Battery Pack Capacity
Learn in SI (Document ID# 2560214). This is
recommended to aid in the resolution of the reduced
propulsion concern. Charge the vehicle fully after the
reset and explain to the customer that the EV range will
return after a few full discharge / charge events.
Parts Information
No parts are required for this repair.
Page 2 June, 2019 Bulletin No.: 19-NA-079
Warranty Information
⇒ If #N172130462: Customer Satisfaction Program
– Loss of Propulsion Due to Low Cell Voltage for
the vehicle is currently “Open” in IVH, then use
Labor Operation 9104230 Hybrid Powertrain
Control Module 2 Programming and Setup with
SPS. Refer to the Campaign Bulletin for
instructions.
Warranty coverage code V applies to National
Coverage and E is for California emissions (RPO PCV)
for the following labor operation and is covered for
8 years or 100,000 miles (160,000 km). Reference the
Applicable Warranties section of Investigate Vehicle
History (IVH) for coverage information.
Labor
Operation
Description Labor Time
5080288* Diagnosis of Reduced
Propulsion Power
0.1 hr
*This is a unique Labor Operation for Bulletin use only.
Version 3
Modified Released April 16, 2019
May 06, 2019 – Revised the Service Procedure to refer to: #N172130462: Customer
Satisfaction Program – Loss of Propulsion Due to Low Cell Voltage and updated the
Warranty Information to change the warranty statements and Bulletin Only Labor
Operation.
June 03, 2019 – Added the Cadillac ELR model, the 2014-2015 Model Years and an
Important statement in the Service Procedure.
SEOCONTENT-END
Bulletin No.: 19-NA-079
Date: June, 2019
https://www.nhtsa.gov/recalls?nhtsaId=10163235
https://static.nhtsa.gov/odi/tsbs/2019/MC-10163235-9999.pdf
To View or Download this Document Click Here
Bulletin No.: 19-NA-079
Date: May, 2019
https://www.nhtsa.gov/recalls?nhtsaId=10161893
https://static.nhtsa.gov/odi/tsbs/2019/MC-10161893-9999.pdf
To View or Download this Document Click Here
Reprogramming
GM Diagnostic/Programming (TIS2Web)
Approved J2534 Device with TIS2WEB can reprogram 1996 and later All GM Modules.
To obtain the latest electronic controller calibration information for your vehicle, go to https://tis2web.service.gm.com/tis2web and enter the vehicle's 17 character Vehicle Identification Number (VIN) and select 'Get CAL ID’.
You can then compare the latest part number with the actual number installed on the vehicle to determine if a reprogram is needed.
The Service Programming System (SPS) application is part of the TIS2Web system. To program an ECU, the SPS application must communicate with the vehicle control modules using the proper J2534 programming interface tool.
The following are the supported interface tools:
The Tech 2 supports model years 1996 and beyond. With the addition of the CAN Diagnostic Interface (CANdi) module, Tech 2 is fully backward compatible with current Tech 2 functionality and operates transparently when diagnosing non-CAN-equipped vehicles.
Servicing the next generation Global A vehicles will require the diagnostic software, GDS2, Global Diagnostic System 2 running on a local PC device while the MDI is connected to the vehicle. The GM MDI is the Global Diagnostic tool for future vehicles starting with Global A vehicles.
The GM MDI was introduced in the fall of 2007 for Pass-Thru programming and offers faster programming speed. It can be used to perform Pass-Thru programming on all vehicles built since 1996 and into the future. Click here to view a list of GDS supported vehicles.
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