MAS003711 Service Bulletin/Repair Instructions

TECHNICAL SERVICE OPERATIONS
MAS003711 RU 23-37

RAPID UPDATE

FROM: Maserati TSO

TO: Maserati Network
Rapid Update 645

MC20 – Knock Sensor Check
DATE: JULY 26 2023
Certain Maserati MC20 (M240) MY22 MY23 listed in MODISCS+ are involved in a Rapid Update

to carry out a KNOCK sensor cleaning procedure.

Vehicles transported overseas may experience humidity accumulation on the sensor covers

due to the configuration of the engine hood. This, in turn, may cause the sensors not to respond

correctly, leading to problems after starting the engine.

We remind you that all the Rapid Updates must be performed within the first workshop visit,

regardless of the Mandatory setting set in Modis, as required by Maserati policies.

Also, for vehicles in Stock Dealer / PDI, it is necessary to carry out all action operations before

delivery to the end customer, as required by the White Book and explicitly reported in the Predelivery checklist.
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. (Maseratitechsupport@maserati.com)

Thank You for your continued support and cooperation.

Maserati Americas

Aftersales Dept.
© 2023 Maserati Americas

Aftersales

www.maseratiusa.com
MAS003711
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
Procedure

1. Always check ModisCS+ to see if the vehicle is involved in this action and if it has not been

previously performed.

2. Start the Engine.

3. Warm up the engine at idle for about 10 (ten) minutes, depending on the environmental

conditions

Note: Please follow the indication of the cluster to check the state of the engine.
4. Connect the EVO and continue to “Vehicle view” and wait until it has been fully updated.

5. Clear only the DTCs related to the ECM module: ▪ ECM ► DTCs ► Clear ECU DTCs

Note: The only DTC allowed is P0350 - Ignition Coil Primary/Secondary Circuit.

If other DTCs are present: Open a BOL as “support request” for further assistance.

6. ECM Diagnosis ► Active Diagnosis ► GPF Service Regeneration

Preconditions:

▪ Engine ON

▪ Gear in N or P position

▪ Engine at operating temperature (70°C < Coolant Temperature < 108°C)

▪ No pedal pressed (accelerator and brake)

▪ Vehicle Speed = 0

▪ Not excessive temperature of Exhaust component (GPF < 850°C)

The Malfunction Indicator Light (MIL) will “come ON” when the

ignition switch is in the ON position and then “Shut OFF” soon after

the engine is started (the MIL may not shut OFF immediately).

If the MIL starts flashing: The GPF service regeneration Is ready to be

performed.

If the MIL stays ON: Stop the GPF Service Regeneration

By following Steps 7 through 10 then open a BOL as “support request”

for further assistance.

© 2023 Maserati Americas

Aftersales

www.maseratiusa.com
MAS003711
All rights reserved. Reproduction or translation in

whole or in part is not permitted without

authorization from the publisher. Printed in USA
2
Wait 5 minutes.

Warning: During this phase, the engine will run at 3000 rpm.
TECHNICAL SERVICE OPERATIONS
7.
8. Interrupt the procedure after 5 (five) minutes by pressing the brake pedal.

9. Stop the engine.

10. Disconnect the EVO.

11. Procedure complete.
Warranty Claim

Fill in the relative Warranty Claims as follows:
Description
Code
Rapid Update Number
645
Warranty Code
23
Fault Code
063
Component Code

Operation Code
© 2023 Maserati Americas

Aftersales

www.maseratiusa.com
MAS003711
1.90.005

1.90.005.A (0.5h)
All rights reserved. Reproduction or translation in

whole or in part is not permitted without

authorization from the publisher. Printed in USA
3

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