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GAP Diagnostic 2019-07-15 All Rights Reserved
User Manual : Version 33, Firmware V3.0
Body Control (L319-04, L320-05)
Updating the BCM Body Control ECU adds the 3 turn flash feature. To work, it will also have to be
enabled in the Car Configuration File (CCF).
Table 40.
Risk, updating the Body Control ECU
• Re-flashing the Body Control ECU takes around 2.5 minutes.
• Good electrical connections at the OBD connector and high enough battery voltage are both
critical to the success of the BCM re-flash.
• If you do not have access to a power supply (Midtronic’s PSC-550, CTEK MXS 25 or equi
-
valent), use jump cables and another vehicle with the engine running to supply current to the
battery.
• Do not use a regular battery charger.
• Make sure you have plenty of time ahead before proceeding.
• if re-flashing fails on the first attempt, fuses 15 and 16 of the engine fuse box will have to be
removed quickly to prevent damages to latches or other devices controlled by the BCM. We
strongly recommend loosening the fuses using pliers before updating the BCM. This way, it will
be easier to remove both of them quickly in case of a failure.
Recovery Method
If a failure occurred and a second attempt is needed, select the function to re-flash the BCM and when
the message “Toggle Fuse” is displayed, reconnect fuse 15. The re-flash will start automatically and
once completed, reconnect fuse 16. If it failed on the second attempt also with only fuse 15 installed,
try again with fuse 16 only.
If the recovery method was not successful, please contact the manufacturer for additional support :
.
Figure 105.
Battery fuse holder location
Figure 106.
Fuses 15 and 16, Body Control
ECU
Risk Level
Consequences
Recovery Method
Precautions
High
Vehicle unusable, damage to
rear latch or other possible
Instructions below
Mandatory
