Address assignment table

The system diagnostic features allow a comprehensive parameter check. All the troubleshooting activities should be performed with the vehicle stationary. The diagnostic function is interrupted when:

• it is switched off
• the diagnostic phase is ended
• the instrument does not receive a command for more than 5 seconds
• the vehicle speed exceeds 5 km/h

ADDRESS ASSIGNMENT TABLE

The input torque - output current characteristic, steering sensitivity, return damping, inertia compensation, active return parameters and any generated errors are mapped in the ECU in dedicated addresses which can be accessed by the repairer by means of a diagnostic tool. Some of these parameters can only be read in the monitor RAM to prevent accidental ECU mapping deletion. The table illustrates the error meaning corresponding to the high logical levels of the bit set of the respective addresses from FE06 to FE14.

MONITOR RAM

The monitor RAM is used to check and correct the various parameters, when required.

Note: The monitor RAM must be used by skilled personnel who are informed of the various settings. Improper use of the tool can alter the ECU setting parameters and compromise device operation.

The monitor RAM switches perform the following functions:

• Power SW
• Special SW: select high addresses;
• SW2: enter data
• ADD/COM: select address
• DATA/INT: data to be entered

Observe the following procedure when using the tool:

• Power the monitor RAM by means of the power SW.
• Set addresses FE00_FEFF with the special SW to high; otherwise, for FD00_FDFF addresses the special SW should be set to low.
• Select the byte address with the ADD/COM SW: byte high with left-hand switch and byte low with right-hand switch.
• Select the data with the DATA/INT SW: byte high with the left-hand switch and byte low with the right-hand switch.
• Key in the data with SW2 and enter with DATA/INT at the DATA/COM address
• Save the data (which after entry are active but volatile) as follows:
• Select the FE22h address (special SW high and ADD/INT=22)
• DATA/INT=6F
• SW2
• DATA/INT=63
• SW2
• DATA/INT=10
• SW2

The sequence of these operations must be followed carefully to set the monitor RAM correctly.