Citroen C5 Aircross Quiz
Exterior lighting / signalling

Faulty bulb detection

In this manual: Exterior lighting / signalling
AAS - Parking Aid — 8Owner's Manual Citroën C5 II — 139Citroen C5 Aircross (2017- 2024) - Owner's Manual — 143Audio system — 14Overspeed control — 7Multifunction display — 4Driver information instrument cluster — 20Navigation assistance — 8Intruder alarm — 7Mechanical specifications — 9Power supply — 8Electrical equipment — 13Lighting and electrical equipment — 3Immobiliser — 4Sunroof — 10Exterior lighting / signalling — 38Multiplexing — 7Air conditioning — 7Body — 6General specifications — 9Automatic gearbox control — 3Exterior mirrors — 10Airbags — 5Defrost — 6Underinflation — 6Interior lighting — 4Wipers / Washers — 6Window lifters — 11Cooling — 8Opening management — 7Cruise control — 5Suspension — 4Grip management — 1Paint — 2Exterior lighting control — 1Indicators (turn signals) — 1Automatic lighting systems - General recommendations — 1Wiper control — 1Special position of the front wipers — 1
~1min read

This function doubles the flashing frequency of the turn signals (left or right) if at least one faulty bulb is detected.

Detection is performed while the turn signals are operating, by reading the turn signal control current.

If the current drawn by the BSI is lower than the programmed current, operation is normal. Otherwise, the flashing frequency is doubled.

Any operating fault is recorded by the BSI so that it can be read by the diagnostic tool.

Note: When a towing bracket is fitted, 2 faulty bulbs are required for detection.

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