ECM AND INSTRUMENT CLUSTER (IC) MATCHING

The security system is designed to stay active in the event the
ECM or the IC has to be replaced. The VIN, the PIN, the
security status, and the total mileage are stored in the ECM
and the IC. If either one of these components is replaced, it
learns the information from the other.

When Replacing the ECM

When the ECM is replaced, the new ECM copies the VIN and
the mileage from the existing IC. Once the VINs match, the
ECM matches the IC PIN and security setting. This works with
a used ECM as long as the ECM security is not active. If the
ECM security is active, it sees the IC as an invalid VIN and
displays THEFT ERROR on the IC.

When Replacing the Instrument Cluster (IC)

The IC can only have a VIN written to it once. It cannot learn
a new VIN if a VIN has already been written to it. Therefore,
when replacing the IC, it must be a new IC.

NOTE

When the IC is replaced, there is a 30 minute timer that counts
down before the information is written to the IC. This is done
so the technician has time to test a new cluster to determine
whether the fault is within the cluster or not before the cluster
is matched to the ECM. Once the VIN is written to the IC, it
cannot be cleared.

If the ECM is in a secure state and a new IC is installed, the
ECM will not recognize it and the message THEFT ERROR
displays on the IC. Whether or not the ECM is in a secure state,
the IC begins to match to the ECM. A 30 minute counter displays
instead of the clock on the IC. It counts down and when
the 30 minutes are up the VIN is permanently written to the IC.
This 30 minute delay is so the new IC can be tested to verify
a repair and removed if it did not resolve the issue. If the ignition
is turned off, the timer stops but stays where it is and continues
to count down when the ignition is turned back on. In order to
reset the timer back to 30 minutes, disconnect the battery
power completely from the IC.

DTC P1009 Security System Fault or THEFT ERROR Message

The ECM sets a P1009 and THEFT ERROR displays on the
IC when the security data shared between the IC and the ECM
does not match, or if there is a loss of communication between
the IC and the ECM. If there is a loss of communication while
the engine is running, COMM ERROR displays until the ignition
is turned off. When the ignition is turned back on THEFT
ERROR instead of COMM ERROR displays on the IC.

Yes, but this is only if the IC is new, those get updated by the mileage stored in the ECM.
Used IC keep their mileage and update the ECM. This is a quote from the 1125 service manual:



From the IC's point of view it's a replaced ECM if a used IC is attached to the bike.

That's how I understand it from the above...

Still no one with a clue on this issue?