Aftermarket COMAND replacements - Revision history

Ricebubbles: /* DIY Remote Wakeup Circuit */ Added modification to wake Erisin on UNLOCK and LOCK commands

2020-08-12T07:08:09Z

DIY Remote Wakeup Circuit: Added modification to wake Erisin on UNLOCK and LOCK commands

← Older revision		Revision as of 07:08, 12 August 2020
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	Note the Erisin ANT/AMP-CON (blue) wire is a source of 12V power to be used to power/control an antenna or an external audio amplifier. It has nothing to do with waking up the Erisin media unit.		Note the Erisin ANT/AMP-CON (blue) wire is a source of 12V power to be used to power/control an antenna or an external audio amplifier. It has nothing to do with waking up the Erisin media unit.
	===DIY Remote Wakeup Circuit===		===DIY Remote Wakeup Circuit===
			'''Update as of 20200812'''
			After designing, building and and installing this circuit, I discovered another issue which annoyed me immensely. Whenever the car was switched off and then returned to within say five to ten minutes, which I seem to do quite regularly, the Erisin would go through the whole startup process again, and I realised I needed to have about an hour delay for [[both]] switch on and switch off. Fortunately my original circuit described below is easily modified to do this, and what's more, is a simpler circuit. With this modification the I/P1 from the PSE SD Valve is not needed nor is the RL1 relay. To achieve this all I had to do was to bypass the RL1 normally open contact with a small piece of wire soldered in place which effectively makes the RL1 relay do nothing at all. (It could be removed completely.) Then to increase the time delay from six minutes to about one hour, just add a 10M Ohm resistor in series with the 1.5M Ohm making a timing resistor of 11.5M Ohms. Now the Erisin powers up the moment the Remote Control UNLOCK or LOCK buttons are pressed, and will stay powered on for about one hour.

			'''What follows is the original Description without the above modification.'''
	A special DIY Remote Wakeup Circuit has been designed which achieves the required function. It requires an extra connection to the Erisin to wake up the media unit and also requires a small modification to the Pneumatic Systems Equipment (PSE) Pump ECU, plus installation of an additional wire from the boot/trunk to the media unit.		A special DIY Remote Wakeup Circuit has been designed which achieves the required function. It requires an extra connection to the Erisin to wake up the media unit and also requires a small modification to the Pneumatic Systems Equipment (PSE) Pump ECU, plus installation of an additional wire from the boot/trunk to the media unit.
	[[File:PSE to Erisin Media Unit Remote Wakeup Block Diagram.JPG\|500px\|center\|thumb\|none\|PSE to Erisin Media Unit Remote Wakeup Block Diagram]]		[[File:PSE to Erisin Media Unit Remote Wakeup Block Diagram.JPG\|500px\|center\|thumb\|none\|PSE to Erisin Media Unit Remote Wakeup Block Diagram]]
	'''WARNING:''' Be aware the construction of the DIY circuit requires some electronics knowledge, but would make a good project for a beginner.		'''WARNING:''' Be aware the construction of the DIY circuit requires some electronics knowledge, but would make a good project for a beginner.

	===How It Works===		===How It Works===
	When the key unlock button is pressed to remotely unlock the car, the PSE pump produces a vacuum which is used to unlock the doors and fuel flap. A signal can be obtained from both the PSE SK Valve and the PSE TD Valve to start a timer of approximately five minutes to wake up the Erisin.		When the key unlock button is pressed to remotely unlock the car, the PSE pump produces a vacuum which is used to unlock the doors and fuel flap. A signal can be obtained from both the PSE SK Valve and the PSE TD Valve to start a timer of approximately five minutes to wake up the Erisin.

Pokseva: /* Circuit Diagram */ fixed link

2020-03-08T13:17:07Z

Circuit Diagram: fixed link

← Older revision		Revision as of 13:17, 8 March 2020
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	[[File:Erisin Remote Wakeup 02.jpg\|500px\|center\|thumb\|none\|W220 PSE Modification for Erisin Wakeup Closeup]]		[[File:Erisin Remote Wakeup 02.jpg\|500px\|center\|thumb\|none\|W220 PSE Modification for Erisin Wakeup Closeup]]
	===Circuit Diagram===		===Circuit Diagram===
	[File:Erisin Remote Wakeup Circuit Diagram.jpg\|500px\|center\|thumb\|none\|PSE to Erisin Remote Wakeup Circuit Diagram]]		[[File:Erisin Remote Wakeup Circuit Diagram.jpg\|500px\|center\|thumb\|none\|PSE to Erisin Remote Wakeup Circuit Diagram]]

	===Layout Diagrams===		===Layout Diagrams===
	[[File:Erisin Remote Wakeup 01.jpg\|500px\|center\|thumb\|none\|PSE to Erisin Remote Wakeup]]		[[File:Erisin Remote Wakeup 01.jpg\|500px\|center\|thumb\|none\|PSE to Erisin Remote Wakeup]]

Ricebubbles: /* Resources - Aftermarket COMAND replacements */ Added new section DIY Erisin Remote Wakeup System

2020-03-05T06:17:54Z

Resources - Aftermarket COMAND replacements: Added new section DIY Erisin Remote Wakeup System

← Older revision		Revision as of 06:17, 5 March 2020
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	MBWorld has several postings on options and fabulous videos on aftermarket Head Units installed in MB E-class W211 vehicles. See		MBWorld has several postings on options and fabulous videos on aftermarket Head Units installed in MB E-class W211 vehicles. See
	[https://mbworld.org/forums/e-class-w211/595334-after-market-android-4-4-4-quad-core-complete-install-vids-pics-txt.html]		[https://mbworld.org/forums/e-class-w211/595334-after-market-android-4-4-4-quad-core-complete-install-vids-pics-txt.html]

			==DIY Erisin Remote Wakeup System==
			===Preliminary===
			The Erisin ES7882S Media Unit is a favoured after-market COMAND replacement as it “looks the part” perfectly.
			[[File:After-market Erisin Head Unit in W220.jpg\|500px\|center\|thumb\|none\|After-market Erisin Head Unit in W220]]
			However, it has several annoying features, one of which is the slow boot up. The Erisin ES7882S media unit uses the CAN-Bus signals to wake up and normally no other power connections are required other than +12V and Ground.
			[[File:Erisin ES7882S.JPG\|500px\|center\|thumb\|none\|Erisin ES7882S Media Unit Retrofit Wiring Diagram in W220]]
			I was extremely disappointed with the slow switch on of the Erisin unit. The device as delivered requires the ignition key to be inserted and turned to position 1 (ACC) or 2 (IGN) before the Erisin would start to boot up after the car has been turned off. It also takes nearly a minute to boot up completely.
			To overcome this, other enthusiasts have wired the Erisin to be permanently on and to use the in-built sleep function to switch off the screen after a certain time has elapsed. They report that the current draw does not impact significantly on the state of battery charge even after a few days as long as the car is driven regularly. The author’s vehicle tends to sit unused for weeks on end and so any additional drain on a sleeping battery is not desirable, thus ruling out this option.
			Consequently, the author designed a method to remotely wakeup the Erisin as soon as the car receives an unlock command from the key fob.
			===Wakeup Options===
			Ref WIS PE82.85-P-2101-99SH Wiring diagram of cockpit management and data system (COMAND) control module for MODEL 220 as of 1.9.03 with code 352a has a Wakeup wire (bl/sw blae/schwarz blue/black) connected. On the author’s W220 S500L with A40/3 COMAND which has code 527 COMAND DVD APS WITH NAVIGATION, the wakeup blue/black wire sits at +12V until a wakeup signal is generated over the CAN-Bus. The blue/black wire then momentarily pulses towards 0V for about 0.25 secs ONLY when the Ignition is turned from Off to Accessories or to On and initiates the CAN-Bus wakeup. (Note no wakeup signal is produced when the car is unlocked manually or remotely.) The quick negative going pulse is used to wake up the OEM COMAND.
			[[File:Erisin Connectors.JPG\|500px\|center\|thumb\|none\|Erisin ES7882S Connectors]]
			The Erisin ES7882S unit has an ACC red wire as a possible input. If 12V is applied to this red wire the Erisin switches on and stays on as long as the red wire is powered or the ignition is turned on. The ACC is obviously intended for powering and waking up the Erisin using the Accessories (ACC) 12V supply available from the ignition switch. As far as the author can determine for the W220, there is no readily available OEM source of a suitable 12V supply to activate the red wire to wake up the Erisin when it is in sleep mode.
			Note the Erisin ANT/AMP-CON (blue) wire is a source of 12V power to be used to power/control an antenna or an external audio amplifier. It has nothing to do with waking up the Erisin media unit.
			===DIY Remote Wakeup Circuit===
			A special DIY Remote Wakeup Circuit has been designed which achieves the required function. It requires an extra connection to the Erisin to wake up the media unit and also requires a small modification to the Pneumatic Systems Equipment (PSE) Pump ECU, plus installation of an additional wire from the boot/trunk to the media unit.
			[[File:PSE to Erisin Media Unit Remote Wakeup Block Diagram.JPG\|500px\|center\|thumb\|none\|PSE to Erisin Media Unit Remote Wakeup Block Diagram]]
			'''WARNING:''' Be aware the construction of the DIY circuit requires some electronics knowledge, but would make a good project for a beginner.
			===How It Works===
			When the key unlock button is pressed to remotely unlock the car, the PSE pump produces a vacuum which is used to unlock the doors and fuel flap. A signal can be obtained from both the PSE SK Valve and the PSE TD Valve to start a timer of approximately five minutes to wake up the Erisin.
			The SK (Air Inlet Valve) is only activated when the PSE produces a vacuum. The TD (Fuel Flap Lock Valve) is activated during BOTH unlock (vacuum) and lock (+ve pressure) commands. If these two sources are electronically ‘ANDED’ together the only time an output signal is produced is when BOTH valves are activated, which is the unlock situation.
			Once triggered the timer produces a timed 12V output signal which is connected to the red ACC input wire on the Erisin, thus waking up the media unit for at about six minutes. This gives enough time to open the door, put on the seat belt, insert the key into the ignition and switch to on. By this time the media unit will have booted up and the functions such as reversing camera, navigation app, music app etc will be immediately available. This output 12V signal also latches the DIY circuit on for the duration of the timing period (about six minutes).
			===Modification to PSE to Access Wakeup Signals (SK and TD Valves)===
			The PSE Pump and ECU is located in the rear left side of the boot/trunk and is accessible after removing some of the internal linings.
			[[File:Pneumatic System Equipment or PSE Pump in Boot or Trunk.JPG\|500px\|center\|thumb\|none\|Pneumatic System Equipment or PSE Pump in Boot or Trunk]]
			For a thorough description of the W220 PSE Pump see [[Pneumatic System Equipment (PSE) Pump]]
			When the car is locked using the Remote Key, the PSE Pump produces +ve pressure (28Kpa or 4psi), and couples it via the TD port to the Fuel Filler Flap Solenoid which moves a pin out to lock the Fuel Filler Flap, and then returns the port to atmospheric pressure.
			When the car is unlocked using the Remote Key, the PSE Pump produces -ve pressure (8”Hg vacuum), and couples it via the TD port to the Fuel Filler Flap Solenoid which retracts the pin to unlock the Fuel Filler Flap, and then returns to atmospheric pressure. The following diagram shows the PSE pump producing -ve pressure (vacuum).
			[[File:W220 PSE Pump Internal Pneumatic Schematic in Vaccum Generating Mode.jpg\|500px\|center]]
			The SK valve is only used when the PSE Pump produces a vacuum. The SK Valve is not activated when the car is locked (when the PSE Pump produces +ve pressure.) Consequently signals from BOTH the SK Valve and the TD Valve are electronically ‘ANDED’ together to produce the required unlock trigger signal for the Timer.
			===Identifying the PSE Pump Solenoid Valves===
			The next diagram shows the PSE ECU removed from its housing with solenoid valves attached. Note it is not necessary to remove the PSE ECU to make the required connections.
			[[File:W220 PSE Pump Internal Assembly.JPG\|500px\|center]]
			Identifying the PSE Solenoid Valves circuit board connections, each of which has a coil with 34 Ohms resistance.
			[[File:W220 PSE Pump Coil Resistances.JPG\|500px\|center]]
			===Modification to the PSE Pump ECU===
			The modification to the PSE that is required is to solder a wire to the SK Valve (control side), solder a wire to the TD Valve (control side), and solder wires to the PSE +ve and the PSE Ground. These wires must be routed externally to the PSE to the DIY Remote Wakeup Circuit by cutting a small slot in the case. (The author was able to use an existing slot in the PSE case for routing the small cable to the new circuit. The author’s PSE pump has been fitted with a copper coil heat exchanger to eliminate excess heat damage to the pump’s internal ports and channels, in the event the PSE pump inadvertently locks on, for some reason. It has already saved one system from permanent damage.
			See [https://w220.ee/Pneumatic_System_Equipment_(PSE)_Pump#DIY_Add_a_Heat_Radiator_in_Output_Port_Line] for more details of this modification.)
			[[File:W220 PSE Modification for Erisin Wakeup.jpg\|500px\|center\|thumb\|none\|W220 PSE Modification for Erisin Wakeup]]
			Closeup View of DIY connections with designations.
			[[File:W220 PSE Modification for Erisin Wakeup Closeup.jpg\|500px\|center\|thumb\|none\|W220 PSE Modification for Erisin Wakeup Closeup]]
			An additional wire must be installed between the DIY Remote Wakeup Circuit (Output) in the boot/trunk and the Erisin ACC (Red) connection behind the Media Unit in the cabin. (The author found this to be quite easy by using a long plastic rod with the new wire taped to one end, and the rod poked through from the boot to the rear left seat area. The same technique was then used to progressively feed the wire under the carpets down the side of the front left seat, then finally under the front carpet and up into the centre console area.)
			===Electronic Circuit===
			The DIY Remote Wakeup Circuit was constructed on a small piece of electronics proto-typing Veroboard or strip board, which was fitted into a small plastic component box. The completed unit was installed adjacent to the PSE Pump. (The author simply wrapped the box in soft material and squeezed it into a suitable space adjacent to the PSE, and then secured it with plastic ties.)
			LEDs, although unnecessary, were used extensively in this prototype, so that it was very easy to observe the operation of the completed unit. All up the electronic components cost about $50.
			[[File:Erisin Remote Wakeup 02.jpg\|500px\|center\|thumb\|none\|W220 PSE Modification for Erisin Wakeup Closeup]]
			===Circuit Diagram===
			[File:Erisin Remote Wakeup Circuit Diagram.jpg\|500px\|center\|thumb\|none\|PSE to Erisin Remote Wakeup Circuit Diagram]]
			===Layout Diagrams===
			[[File:Erisin Remote Wakeup 01.jpg\|500px\|center\|thumb\|none\|PSE to Erisin Remote Wakeup]]
			[[File:Erisin Remote Wakeup Layout Component Side.jpg\|500px\|center\|thumb\|none\|PSE to Erisin Remote Wakeup Layout Component Side]]
			===Waveform Diagrams===
			The waveform diagrams show how the circuit only produces an output (O/P and ACC) signal when BOTH the SK valve and the TD valve are activated. (I.e. an output wakeup command is only produced when the car is unlocked using the remote key fob.)
			[[File:Erisin Remote Wakeup Waveforms.jpg\|500px\|center\|thumb\|none\|PSE to Erisin Remote Wakeup Waveforms]]
			===Bonus===
			Inspect the table on the circuit diagram which shows the current draw for each possible input and output state. The bonus with this “latching” type of circuit is that there is zero current draw in its off state. Consequently, the addition of this DIY PSE to Erisin Remote Wakeup Circuit does not increase the quiescent current draw from a sleeping battery.
			===Conclusion===
			The installation of this DIY remote wakeup for the Erisin media unit in a W220 has significantly enhanced the way the system powers up and makes the whole media unit much more useful during the starting phase. The reversing camera and radio or media player are now available immediately on starting the car and not a minute or so later driving down the road.

Ricebubbles: /* Options - Aftermarket COMAND replacements */ Added new section Resources - Aftermarket COMAND replacements

2018-05-26T12:45:07Z

Options - Aftermarket COMAND replacements: Added new section Resources - Aftermarket COMAND replacements

← Older revision		Revision as of 12:45, 26 May 2018
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	[[File:020 Replacement Erisin COMAND with modification brackets.jpg\|300px\|center]]		[[File:020 Replacement Erisin COMAND with modification brackets.jpg\|300px\|center]]


			==Resources - Aftermarket COMAND replacements==
			MBWorld has several postings on options and fabulous videos on aftermarket Head Units installed in MB E-class W211 vehicles. See
			[https://mbworld.org/forums/e-class-w211/595334-after-market-android-4-4-4-quad-core-complete-install-vids-pics-txt.html]

Ricebubbles: Added introductory words.

2018-05-26T12:02:25Z

Added introductory words.

← Older revision		Revision as of 12:02, 26 May 2018
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	==Description - Aftermarket COMAND replacements==		==Description - Aftermarket COMAND replacements==
	~~Edit required~~.		High-end aftermarket car stereo Head Units are available for Mercedes-Benz S-Class W220.

			There are several brands available and most offer the following;
			* Touch Screen Control
			* CD/DVD player (DVD/VCD/HVCD/MP4/MP3/CD/AVI/DIVX et alia).
			* Built-in Navigation.
			* Blue Tooth to connect mobile phone for hands free use.
			* SD Card slot.
			* Auxiliary input port for portable multimedia devices (video and audio).
			* Reversing Camera option.
			* Compatible with original Canbus system for steering wheel control.

			[[File:W220_aftermarket_headunit_installed.jpg\|300px\|center]]

	==Issues - Aftermarket COMAND replacements==		==Issues - Aftermarket COMAND replacements==
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	* Steering wheel controls may not work		* Steering wheel controls may not work
	* Replacement head unit may not work with the original amplifier		* Replacement head unit may not work with the original amplifier

	~~[[File:W220_aftermarket_headunit_installed.jpg\|300px\|center]]~~

	==Options - Aftermarket COMAND replacements==		==Options - Aftermarket COMAND replacements==

Ricebubbles: /* Seicane S018800w */ Added picture of Seicane Head Unit.

2018-05-26T11:51:28Z

Seicane S018800w: Added picture of Seicane Head Unit.

← Older revision		Revision as of 11:51, 26 May 2018
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	The Seicane information and installation instructions are here [https://www.seicane.com/car-dvd-player-for-mercedes-benz-s-w220-with-gps-radio-tv-bluetooth-srd-8800]		The Seicane information and installation instructions are here [https://www.seicane.com/car-dvd-player-for-mercedes-benz-s-w220-with-gps-radio-tv-bluetooth-srd-8800]

			[[File:Replacement Seicane Head Unit for W220.jpg\|300px\|center]]

	===Erisin===		===Erisin===
	BenzWorld Member Dave2302 used an Erisin head unit replacement with a good description of the ease of installation in a pre-facelift W220 (none Bose Car and no Fibre Optics). See here [http://www.benzworld.org/forums/w220-s-class/2693609-s500-resurrection-daves-thread-28.html#post17429553].		BenzWorld Member Dave2302 used an Erisin head unit replacement with a good description of the ease of installation in a pre-facelift W220 (none Bose Car and no Fibre Optics). See here [http://www.benzworld.org/forums/w220-s-class/2693609-s500-resurrection-daves-thread-28.html#post17429553].

Ricebubbles: /* Issues - Aftermarket COMAND replacements */ Added section for Options - Aftermarket COMAND replacements

2018-05-26T11:46:44Z

Issues - Aftermarket COMAND replacements: Added section for Options - Aftermarket COMAND replacements

@@ Line 11: / Line 11: @@
 [[File:W220_aftermarket_headunit_installed.jpg|300px|center]]
+==Options - Aftermarket COMAND replacements==
 {{#ev:youtube|https://www.youtube.com/watch?v=S_kIkNhw75s|320|left|COMAND replaced with Alpine INA-W910 Touchscreen system.|frame}}
 <br clear=all>

Pokseva: COMAND replaced with Alpine INA-W910 Touchscreen system

2016-01-02T19:14:05Z

COMAND replaced with Alpine INA-W910 Touchscreen system

← Older revision		Revision as of 19:14, 2 January 2016
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	[[File:W220_aftermarket_headunit_installed.jpg\|300px\|center]]		[[File:W220_aftermarket_headunit_installed.jpg\|300px\|center]]


			{{#ev:youtube\|https://www.youtube.com/watch?v=S_kIkNhw75s\|320\|left\|COMAND replaced with Alpine INA-W910 Touchscreen system.\|frame}}
			<br clear=all>

Ricebubbles at 10:48, 19 March 2015

2015-03-19T10:48:52Z

← Older revision		Revision as of 10:48, 19 March 2015
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	~~Challenges~~ installing aftermarket head units:		Back to: [[WIS 82.85 Navigation and Communication System (CNS, ICS, COMAND, FleetBoa) A40/3]]

			==Description - Aftermarket COMAND replacements==
			Edit required.

			==Issues - Aftermarket COMAND replacements==
			Be aware there are several issues related to installing aftermarket head units:
	* Steering wheel controls may not work		* Steering wheel controls may not work
	* ~~May~~ not work with original amplifier		* Replacement head unit may not work with the original amplifier

	[[File:W220_aftermarket_headunit_installed.jpg\|300px]]		[[File:W220_aftermarket_headunit_installed.jpg\|300px\|center]]

W220.ee: Created page with "Challenges installing aftermarket head units: * Steering wheel controls may not work * May not work with original amplifier File:W220_aftermarket_headunit_installed.jpg|300..."

2015-02-23T20:45:43Z

Created page with "Challenges installing aftermarket head units: * Steering wheel controls may not work * May not work with original amplifier File:W220_aftermarket_headunit_installed.jpg|300..."

← Older revision	Revision as of 20:45, 23 February 2015
(No difference)