Module 99 Volvo/Renault Truck EMS 2.3/2.4 ECU Service Mode

Volvo/Renault EMS 2.3/2.4 Bootloader (Test)

Volvo/Renault EMS 2.3/2.4 Bootloader FLASH (MPC5674F/MPC5777C) [Test] [RD/WR/CK]
Volvo/Renault EMS 2.3/2.4 Bootloader EEPROM (MPC5674F/MPC5777C) [Test] [RD/WR]

Caption:

RD: Read

WR: Write

CK: Checksum correction

UNLOCK: Unlock ECU

In version 1.4.7, a new module 99 “Service mode of the ECU EMS 2.3/2.4 of Volvo/Renault trucks (test)” has been added. It is designed for “benchtop” work with the FLASH and EEPROM of the ECU of Renault and Volvo trucks. Reading, writing, checking and correcting checksums are supported.

Composition:
Service mode Volvo/Renault EMS 2.3/2.4 FLASH [READ/REMOTE/COMPUTER]
Service mode Volvo/Renault EMS 2.3/2.4 EEPROM [READ/REMOTE]

Why is the module still a test? Because only a few trucks have been tested yet and some peculiarities may emerge, for example, in checksums. But, considering that in fact you have a full backup on hand and this is the service mode, there is somewhere to roll back.

Connection: Desk-mounted only, requires a 24V, 5A power supply. A cable or box supporting automatic power management is required. It won’t work with wires that are too loose. This mode is not diagnostic. The connection diagram is in downloads.

When identifying , the type of connected ECU is shown (I don’t know how to visually distinguish them):

ECU type: EMS2.3
Bootloader: TRW BOOT-01.07V

Reading:

13:08:58 Entering programming mode
13:08:58 Gaining access
13:08:58 Transferring bootloader
13:08:58 Checking
13:08:58 Identifying module
13:08:59 MCU: MPC5674F
13:08:59 Flash: 4096KB
13:10:50 Completed successfully

Writing (optimization is performed, only the difference is written):

13:11:56 Entering programming mode
13:11:56 Gaining access
13:11:56 Transferring bootloader
13:11:56 Checking
13:11:57 Identifying module
13:11:57 MCU: MPC5674F
13:11:57 Flash: 4096KB
13:11:57 Transferring data
13:11:57 Skipping 000000-003FFF
13:12:53 Completed successfully

Note: When writing, the program automatically patches the ECU software to disable file modification protection, so a message about a KS correction will appear.

Working with EEPROM: Yes. EMS2.3 uses an external 25LC1024 (128 KB), while EMS2.4 uses an internal flash area (256 KB).

Cloning: Should work, but not tested. Simply read and write FLASH (ROM) and EEPROM.

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