2006 Citroen C5 audio system

This unit is the RD4 or RD45 system, made by Continental.
Usually standard equipment unless another system is specified as an option. There are Single & Dual Tuner versions. RD45 features over the RD4: The RD45 has USB connectivity & integrated Bluetooth module supporting Phone & Audio Streaming.

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GiveMeABreak
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Re: 2006 Citroen C5 audio system

Post by GiveMeABreak » 15 Aug 2018, 17:49

The Head unit is held in place by 2 x Torx 10 screws. A word of advice - before undertaking any work on the head unit and before disconnecting anything, open the bonnet, and follow the battery disconnection procedure first. Allow all the ECUs to sleep before disconnecting the battery negative. Then always disconnect the large Quad lock connector FIRST, before any of the other inputs. and attach it back LAST on reconnection.

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Re: 2006 Citroen C5 audio system

Post by Takshaka » 20 Aug 2018, 20:48

Are you referring to a battery disconnection procedure specific to this car or do you just mean remove Negative then Positive? How do I know when the ECUs are asleep? Thanks

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Re: 2006 Citroen C5 audio system

Post by GiveMeABreak » 20 Aug 2018, 21:10

Modern cars especially PSA vehicles have complex electronic data networks that connect all the various electronic control units (ECUs). The main computer controls these units by sending digital data signals through the different networks. They can can stay on for a while after the vehicle is switched off and locked. Normally, they shut themselves off after a certain amount of time. If you disconnect the battery before they have gone to sleep, the ECUs may not shut down properly, leaving them in a state of limbo when the power is returned unexpectedly. Therefore we should always allow the ECUs to be properly shut down and powered up correctly to Void potential issues.

Ths is the procedure before disconnecting the battery and then for reconnecting it:

Disconnection Procedure
  • Put the driver's window down, lift the bonnet and ensure all equipment is switched off.
  • Ensure all doors are closed and remove key from the ignition.
  • Wait for 3 minutes, then disconnect the vehicle battery. Don’t allow the negative lead to accidentally touch the terminal!

Reconnection Procedure
  • Reconnect the vehicle battery, wait a further 4 minutes (do not open ant doors).
  • Switch on the side lights through the driver's window.
  • Switch on the ignition and check system's functionality, don’t start the car!
  • Hold the lock button on the key fob down for 10 seconds.
  • Remove key, then test the central locking system using the fob.
  • Now you can open the door, start the engine and complete the system's check.