TECHNICAL SERVICE OPERATIONS

MAS003397 MCL 23-07
CIRCULAR LETTER
FROM Maserati TSO
TO Maserati Network

Battery Policy for “E-XTEQ” Maximus charger
tester
DATE: MAY 17 2023

As an essential component in the electrical system in Maserati vehicles, the battery plays a
crucial role in ensuring reliable performance and safety. To help maintain battery peak condition,
and ensure optimal performance, this bulletin covers important warranty policies, guidelines for
testing, maintenance, and diagnosis of batteries using the new E-XTEQ MAXIMUS battery
charger/tester.
Refer to the most recently published “BOL Policy” and “Prior Approval Components List” to verify if a BOL
Report is required for battery replacement.

ATTENTION:
BOL or Warranty Claims related to inconclusive Battery Test reports may be subjected to
rejection/transferred.

Operational Procedure Sections:
Follow the section guidelines below to perform conclusive documentation for battery warranty reimbursement:
1.

WARRANTY INFORMATION

2.

DIAGNOSTIC PROCEDURES
A) General Battery Pre-diagnostic Guidelines
B) Visual Inspection
C) Performing a Battery Test using the E-XTEQ MAXIMUS

3.

BATTERY MAINTENANCE AND RECHARGING
A) Battery Maintenance
B) Battery Charging-Safety
C) Battery Charging- Procedure

4.

BATTERY TYPES

5.

E-XTEQ SUPPORT

Please read and review this bulletin first before starting the procedure.
Contact your Regional AfterSales Manager (RAM) or the Technical Support Helpdesk if you have any
questions. ([email protected])

© 2023 Maserati Americas
Aftersales
www.maseratiusa.com

MAS003397

All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA

1

TECHNICAL SERVICE OPERATIONS

1. WARRANTY INFORMATION
If submitting a warranty claim for battery replacement or recharging always first verify warranty
coverage (check the White Book).
When submitting a warranty claim, the following documents must be attached:
•

One battery test printout: The Maximus Tester/Charger will produce a print-out that
provides the following: test results, date, chassis number, CCA, voltage, battery
condition, and a bad cell, yes or no.

•

Photos of the battery label showing the P/N and CCA rating along with a sticky note
showing the time and date.

•

The 15-digit warranty code provided by the tester should be entered in the notes
section of the claim

If the print option is not available all screenshots or printouts generated by the Maximus Tester with
the test results and handwritten VIN along with a signature of the service manager must be
attached to the warranty claim and saved with the vehicle service files.
IMPORTANT: Any Warranty claim submitted without any of the above information is subject to being
rejected.

Battery and printout Examples

© 2023 Maserati Americas
Aftersales
www.maseratiusa.com

MAS003397

All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA

2

TECHNICAL SERVICE OPERATIONS

2. DIAGNOSTIC PROCEDURES
A) General Battery Pre-diagnostic Inspection Guideline
In case of the first visit for a dead battery, follow the diagnostic steps below:
1.

Ask the customer about his/her habits that may cause abnormal battery discharge, such as:
•

light switch left in the “PARK” position

•

light switch left in the “LOW” beam position

•

On M15X (QP and Ghibli) only, the internal backlight rheostat left in the "ceiling lights ON"
position

•

The battery disconnected and reconnected by the customer in an area with no GPS signal
coverage. Over time, this could cause the TBM to absorb more electrical power than normal
while trying to communicate with the server.

2.

Check for aftermarket components installed in the vehicle. (Example: Devices connected to the
DLC connector such as DTC Bluetooth monitoring devices or GPS trackers…etc.)

3.

Perform a visual inspection of the battery including all components connected to it.
See Section “B) Visual Inspection” for more details below.

4.

Perform a complete vehicle scan report of all modules and save it. PDF format

5.

If DTCs are present or if there are other faults, check the components/function causing the error
and/or fault, by checking the condition of the connection/wiring/fuse relating to that specific
component.

6.

If the vehicle is in the workshop for frequent battery discharge or repeated power supply issues.
Perform a parasitic draw test (Battery drain in sleep conditions should be below 70 mA). Open a
BOL as “SUPPORT REQUEST” and attach, and report all the information collected throughout all the
above checks.

B) Visual Inspection
1.

Inspect the battery and BDU (Battery Distribution Unit) terminals for damage/corrosion, and ensure
they are properly tightened including the negative cable connected to the chassis.
(Loose contacts can visually be identified by electrical arcing burn marks or melted nylon lock nuts
which may also set DTCs and prevent proper operation and adversely affect battery life).

2.

Make sure the battery casing is not damaged and is properly fastened to the car.

C) Performing a Battery Test using the E-XTEQ MAXIMUS
Attention: The Battery MUST be disconnected from the vehicle for accurate results. Performing a
battery test with the Battery connected to the vehicle may result in unnecessary extra diagnostic and
charging times.
Note: before starting the procedure, please check for software updates. Perform the SW updates first
If they are available
NOTE: these are general guidelines please review the User Manual for detailed instructions
1.
2.

Disconnect both battery cables.
Connect the E-XTEQ cable clamps to the battery posts.
Caution: be sure the clamps are clamped to the posts securely with good contact.

3.
4.
5.

Enter the correct info into the screen (Battery type, vehicle make, and model MY)
Start the test following the prompts on the screen and wait for the test to be completed.
Print out the result.

Detailed instructions are available in the Maserati Maximus User Manual (See EXTEQ SUPPORT section on page 6)
© 2023 Maserati Americas
Aftersales
www.maseratiusa.com

MAS003397

All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA

3

A) Battery Maintenance
To preserve battery life, it is important to maintain and recharge it appropriately.
It is important to avoid operating the battery at low charge levels. Holding a battery at less than 50% of
the charge level for a long period will lead to sulphation and reduce the battery's capacity and starting
current. The battery will also become more prone to freezing. Use a digital multimeter to measure
battery open-circuit voltage; if lower than 12.40V, recharge the battery. If the car is held in stock, check
the battery voltage monthly. Before delivery to the Owner, fully recharge the battery if an open-circuit
voltage is lower than 12.50V.
Maserati recommends using a battery tender if the customer does not drive the vehicle often. Please
review the Vehicle Owner’s Manual for further details.
Note: Around 12V measured at the battery while the engine is idling may be normal due to the Smart
Alternator Management (SAM) equipped in Maserati vehicles (*non MHEV and EV vehicles). Further
details available in Maserati training material (Core vehicle electronic systems Advanced diagnosis &
repair booklet)

B) Battery Charging – Safety
Please remember that the recharging process generates hydrogen, a potentially hazardous gas. Please
wear the appropriate Personal Protective Equipment.

Always follow these precautions when recharging a battery:
•

Recharge the battery in a well-ventilated environment.

•

Never recharge a battery that has frozen.

•

Ensure that the area is well away from sparks and/or bare flames.

•

Do not interrupt the battery charge until the instrument confirms charge completion.

C) Battery charging –Procedure
When charging the vehicle’s battery using the E-XTEQ MAXIMUS, be sure to disconnect the negative
cable from the battery and connect the charger clamps as illustrated below so that the IBS can monitor
the negative charger clamp (see arrows). Any point on the chassis and IBS is acceptable with the only
exception of the clamp on the negative battery terminal. Refer to the picture below:

© 2023 Maserati Americas
Aftersales
www.maseratiusa.com

MAS003397

All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA

4

TECHNICAL SERVICE OPERATIONS

3. BATTERY MAINTENANCE AND RECHARGING

TECHNICAL SERVICE OPERATIONS

4. BATTERY TYPES
See below known battery types installed in Maserati vehicles.
Attention: when performing a battery test with the E-XTEQ, make sure the correct battery type is selected
Selecting the incorrect battery type may result in an inaccurate test result and may be subject to warranty
review
Note: “Flooded” type batteries are currently being phased out and replaced with the new AGM battery.

FLOODED

AGM

Maserati Spare PN

TYPE Specification Standard

673014605

AGM 100AH-850A

EN

Market
US

673001440

AGM 100AH-850A

EN

LATAM/CANADA

EN

N/A

673005577(discontinued) EFB

95AH-800A

Battery types:
•

A – Flooded.

•

B – AGM (Absorbed Glass Mat).

Flooded batteries can be broken down into:
•

A1 – Pb for standard applications.

•

A2 – Pb Heavy Duty for Start &Stop applications.

© 2023 Maserati Americas
Aftersales
www.maseratiusa.com

MAS003397

All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA

5

TECHNICAL SERVICE OPERATIONS

5. E-XTEQ Support

Please contact E-XTEQ SUPPORT regarding technical assistance, repairs, or replacement.
Before sending a unit back for repair, an RMA (Return Materials Authorization) number
must be obtained by contacting E-XTEQ Technical Support:
E-XTEQ will ascertain if the unit needs to come in for repair or replacement.
If the unit must be replaced, E-XTEQ will provide full instructions for the end
user to receive the replacement parts in the shortest possible time.
Please see attached User Manual (Included with the bulletin in Modis) for additional
information regarding warranty coverage. Link to download has been provided as well.

TECH SUPPORT – USA
1-877-453-3265 English
[email protected]
HOURS OF OPERATION (EST)
Monday – Friday 8 AM to 8 PM
Saturday:10 AM to 3 PM
User Manual and other info:
https://e-xteq.com/customer-documents-stl-maximus/
Warranty information is available in the Owner’s Manual

© 2023 Maserati Americas
Aftersales
www.maseratiusa.com

MAS003397

All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA

6