Driver information instrument cluster

Coolant temperature indicator

~1min read

Normal mode

Synoptique
Block diagram

Phase de fonctionnement en +APC

Operating phase when +APC is on

The coolant temperature indicator shows the driver the engine coolant temperature using a needle gauge.

The engine coolant temperature information comes from the sensor. The engine ECU encodes the measurement in a CAN frame and sends it to the BSI. The BSI converts the information into a VAN Comfort frame and sends it to the instrument cluster.

Special case: engine coolant temperature warning

The engine ECU determines the engine coolant temperature warning based on the defined threshold (118 °C). The engine ECU sends the information to the BSI, which transmits it to the instrument cluster.

Warning lights V12 and V22(*) come on.

(*) depending on equipment level.

Display

The coolant temperature is converted into needle angle according to the following diagram:

Combiné de niveau 1 avec boîte de vitesses manuelle
Level 1 instrument cluster with manual gearbox

Combiné de niveau 2-3 avec boîte de vitesses manuelle et de niveau 1-2-3 avec boîte
Level 2-3 instrument cluster with manual gearbox and level 1-2-3 with automatic gearbox

Mode dégradé

Degraded mode

If a communication error occurs on the network or an invalid value is received, the needle returns to its rest position 5 seconds after the fault appears. During this time, the last value received is displayed.

Test yourself

A quick Citroen C5 Aircross quiz: every answer comes with an explanation and a link to the manual page.