CITROËN DS3 R3 Max System User's Manual page 11

The GDU gear display fitting is optional. It can be ordered at the Boutique Citroën Racing under the reference
DS3R3-S1C0.OPT.010
The fitting of the additional gear display unit implies a reprogramming of your ECU.
When the GDU is fitted, the LED A to F of the main display are disabled.
Revolution Information
LED A&B flashing :
up shift rev
LED A&B fixed :
shift rev
LED A&B fixed and C&D flashing :
Engine's approaching up shift rev
LED A to D Green Fixed :
shift
LED A to D Red Fixed:
Mode and Alarm Informations
Led
Blinking : Not used
Fixed : Information or Alarm
GDU Information
Engine's approaching
Engine's approaching up
Ideal time to
Over revolution
System User Guide - 03.12.14
2. Driver System Overview
3. Dashboard Overview
LED A / LED B / LED C / LED D
LED
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