Overhead Control Panel (OCP) (N70) - Revision history

Ricebubbles: /* DIY Procedures - Overhead Control Panel (OCP) (N70) */

2017-12-16T03:32:20Z

DIY Procedures - Overhead Control Panel (OCP) (N70)

← Older revision		Revision as of 03:32, 16 December 2017
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	==DIY Procedures - Overhead Control Panel (OCP) (N70)==		==DIY Procedures - Overhead Control Panel (OCP) (N70)==
	~~===Issues - Overhead Control Panel (OCP) (N70)===~~
	~~As the issues relating to the Overhead Control Panel (OCP) (N70) are very similar to the issues for the Pushbutton Control Module (N22) refer to section [[Pushbutton Control Module (N22)]].~~

	===Testing - Overhead Control Panel (OCP) (N70)===		===Testing - Overhead Control Panel (OCP) (N70)===
	As the testing methods for the Overhead Control Panel (OCP) (N70) are very similar to the testing methods for the Pushbutton Control Module (N22) refer to section [[Pushbutton Control Module (N22)]].		As the testing methods for the Overhead Control Panel (OCP) (N70) are very similar to the testing methods for the Pushbutton Control Module (N22) refer to section [[Pushbutton Control Module (N22)]].

	~~===DIY - Overhead Control Panel (OCP) (N70)===~~		===Removal - Overhead Control Panel (OCP) (N70)===
	====Removal - Overhead Control Panel (OCP) (N70)====
	<!-- AR82.20-P-1000M, Removing and installing overhead control panel control module -->		<!-- AR82.20-P-1000M, Removing and installing overhead control panel control module -->

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	[[File:W220 Overhead Control Panel N70 Cable Connections.JPG\|600px\|center]]		[[File:W220 Overhead Control Panel N70 Cable Connections.JPG\|600px\|center]]

	====Dismantle - Overhead Control Panel (OCP) (N70)====		===Dismantle - Overhead Control Panel (OCP) (N70)===
	Once the OCP is on a clean work bench it can be dismatled to access the aspirator fan and the thermistor temperature sensor.		Once the OCP is on a clean work bench it can be dismatled to access the aspirator fan and the thermistor temperature sensor.

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	# Reinstall in reverse order.		# Reinstall in reverse order.

	====Repair - Overhead Control Panel (OCP) (N70)====		===Repair - Overhead Control Panel (OCP) (N70)===
	The OCP has one circuit board that includes lighting control, sunroof control and the inside temperature sensor. The yellow arrow is pointing at the Air Temperature Sensor or Thermistor in the center of the mini fan.		The OCP has one circuit board that includes lighting control, sunroof control and the inside temperature sensor. The yellow arrow is pointing at the Air Temperature Sensor or Thermistor in the center of the mini fan.
	[[File:W220 Overhead Control Panel N70 Thermistor Location on PCB.jpg\|500px\|center]]		[[File:W220 Overhead Control Panel N70 Thermistor Location on PCB.jpg\|500px\|center]]

Ricebubbles at 03:29, 16 December 2017

2017-12-16T03:29:43Z

← Older revision		Revision as of 03:29, 16 December 2017
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	#: [[File:W220 Overhead Control Panel N70 Thermistor Soldering Points.jpg\|500px\|center]]		#: [[File:W220 Overhead Control Panel N70 Thermistor Soldering Points.jpg\|500px\|center]]
	# During reassembly thoroughly clean any dust from the aspirator motor and thermistor housing.		# During reassembly thoroughly clean any dust from the aspirator motor and thermistor housing.

	~~==Resistance Specification Sensor N70/b1 - Overhead Control Panel (OCP) (N70)==~~
	If replacing the thermistor refer to [[Resistance Specification - In Cabin Air Temperature Sensor]] which applies to '''both''' In Cabin Air Temperature Sensors ie Sensor N22/b1 which is in Pushbutton Control Module (N22) and Sensor N70/b1 which is in Overhead Control Panel N70. The OEM sensors were found to be not identical in appearance although their electrical properties were very similar.

	==Resistance Specification - Sensor N70/b1 which is in Overhead Control Panel N70==		==Resistance Specification - Sensor N70/b1 which is in Overhead Control Panel N70==

Ricebubbles: /* DIY Dismantle and Repair - W220 2005 S500 OCP */

2017-12-16T03:15:48Z

DIY Dismantle and Repair - W220 2005 S500 OCP

← Older revision		Revision as of 03:15, 16 December 2017
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	==DIY Procedures - Overhead Control Panel (OCP) (N70)==		==DIY Procedures - Overhead Control Panel (OCP) (N70)==
	===DIY ~~Dismantle and Repair~~ - ~~W220 2005 S500~~ OCP===		===Issues - Overhead Control Panel (OCP) (N70)===
	====~~Removing~~ OCP====		As the issues relating to the Overhead Control Panel (OCP) (N70) are very similar to the issues for the Pushbutton Control Module (N22) refer to section [[Pushbutton Control Module (N22)]].

			===Testing - Overhead Control Panel (OCP) (N70)===
			As the testing methods for the Overhead Control Panel (OCP) (N70) are very similar to the testing methods for the Pushbutton Control Module (N22) refer to section [[Pushbutton Control Module (N22)]].

			===DIY - Overhead Control Panel (OCP) (N70)===
			====Removal - Overhead Control Panel (OCP) (N70)====
	<!-- AR82.20-P-1000M, Removing and installing overhead control panel control module -->		<!-- AR82.20-P-1000M, Removing and installing overhead control panel control module -->

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	\|[[File:W220_removing_overhead_control_panel_control_module.jpg]]		\|[[File:W220_removing_overhead_control_panel_control_module.jpg]]
	\|		\|
	* 1 - Light lenses		* 1 - Light lenses
	* 2 - Electrical connectors and connections		* 2 - Electrical connectors and connections
	* N70 - Overhead control panel control module		* N70 - Overhead control panel control module
	\|}		\|}

	# Remove light lenses (1)		# Remove the two light lenses (1) off by prying from the rear. You will then see either two or four steel clips (depending on model) that hold N70 in place. See the yellow arrows in the picture.
	# ~~Press~~ clips (arrows) in direction of arrow and swing overhead control panel control module (N70) down		#: [[File:W220 Overhead Control Panel N70 Mounting Clips.jpg\|500px\|center]]
	# Disconnect electrical connectors (2) and connections (2) on ~~overhead~~ control ~~panel~~ control ~~module~~ (N70)		# Pry the steel clips towards the center of the unit and you should be able to pull it down slightly as you work around then fully down when you release the last tab. WIS says to press clips (arrows) in direction of arrow and swing overhead control panel control module (N70) down.
	# ~~Install in opposite order~~		#: [[File:W220 Overhead Control Panel N70 Cable Connections.JPG\|500px\|center]]
			#: '''Aspirator Fan Interim Test - Overhead Control Panel (OCP) (N70)'''
			#: After you have dropped the console but before you disconnect the wires, just turn the ignition to the on position and with a flashlight you can see the fan spinning in an opening at the end of the unit.
			# Disconnect electrical connectors (2) and connections (2). The two largest connectors are locked in place by levers (yellow arrow). Press the tab and move the leavers down and the connection will come out easily. The other wire connectors are friction only.
			#: [[File:W220 Overhead Control Panel N70 Cable Connections Partly Removed.JPG\|500px\|center]]
			# Reinstall in opposite order. TIP: Check position and number of cables routed through cable clamp before installing OCP. Photo shows a 2003 Update S500.
			[[File:W220 Overhead Control Panel N70 Cable Connections.JPG\|600px\|center]]

			====Dismantle - Overhead Control Panel (OCP) (N70)====
			Once the OCP is on a clean work bench it can be dismatled to access the aspirator fan and the thermistor temperature sensor.

			# Remove Light Bulbs.
			# Remove Back Cover by removing the nine torx screws.
			# Remove Circuit Board by pushing it out of the housing.
			# Reinstall in reverse order.

			====Repair - Overhead Control Panel (OCP) (N70)====
			The OCP has one circuit board that includes lighting control, sunroof control and the inside temperature sensor. The yellow arrow is pointing at the Air Temperature Sensor or Thermistor in the center of the mini fan.
			[[File:W220 Overhead Control Panel N70 Thermistor Location on PCB.jpg\|500px\|center]]

			# Inspect Fan Shroud. The fan shroud is just clipped to the fan base and is, by design, a little loose which can cause it to rattle. Not really loose, but you can jiggle it a little bit with almost no force. During reinstallation add four small blobs of silicon adhesive to each corner of the fan shroud to secure it to the pcb.
			# Inspect the thermistor which is attached by its wires which are melted in place to the fan housing. The thermistor wires are marked with yellow arrows in the photo. They are very brittle and will often be found broken thus causing an issue. The thermistor leads often break due to:
			#: * Contact with the fan (they run right up beside it).
			#: * Fatigue from micro motion of the fan cover or
			#: * Corrosion of the leads or
			#: * A combination of the above.
			#: [[File:W220 Overhead Control Panel N70 Thermistor Location in Shroud.jpg\|300px\|center]]
			# If the wires are not broken they must be unsoldered before removing the fan shroud (with the thermistor connected inside the shroud). This is very difficult to do and it is much easier to cut the wires half way along the vertical length. The thermistor wires marked with yellow arrows are soldered to the printed circuit board near the base of the fan.
			#: [[File:W220 Overhead Control Panel N70 Thermistor Soldering Points.jpg\|500px\|center]]
			# During reassembly thoroughly clean any dust from the aspirator motor and thermistor housing.

	~~Check position and number of cables routed through cable clamp before installing~~ OCP~~. Photo shows a 2003 Update S500.~~		==Resistance Specification Sensor N70/b1 - Overhead Control Panel (OCP) (N70)==
	[[~~File:W220~~ Overhead Control Panel N70 ~~Cable Connections~~.~~JPG\|600px\|center]]~~		If replacing the thermistor refer to [[Resistance Specification - In Cabin Air Temperature Sensor]] which applies to '''both''' In Cabin Air Temperature Sensors ie Sensor N22/b1 which is in Pushbutton Control Module (N22) and Sensor N70/b1 which is in Overhead Control Panel N70. The OEM sensors were found to be not identical in appearance although their electrical properties were very similar.

	==Resistance Specification - Sensor N70/b1 which is in Overhead Control Panel N70==		==Resistance Specification - Sensor N70/b1 which is in Overhead Control Panel N70==

Ricebubbles: Rearranged and added new Issue on Failed Air Temperature Sensor (N70/b1)

2017-12-16T02:11:23Z

Rearranged and added new Issue on Failed Air Temperature Sensor (N70/b1)

← Older revision		Revision as of 02:11, 16 December 2017
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	==Issues - Overhead Control Panel (OCP) (N70)==		==Issues - Overhead Control Panel (OCP) (N70)==
			===Failed Air Temperature Sensor (N70/b1) - Overhead Control Panel (OCP) (N70)===
			The Auto Climate Control (ACC) Air Temperature Sensor (N70/b1) in the Overhead Control Panel (OCP) (N70) often fails and causes the ACC to malfunction. This is easily diagnosed by utilising the ACC Hidden Menu Feature (See [[Automatic Climate Control (ACC) Service Menus]] which allows an access/review/read of the ACC actual parameter values during normal operation. Parameter NR.01: In Car Temperature Sensor (N70/b1), ACC Overhead Control Panel (OCP) (N70) should indicate the in cabin air temperature near the roof of the vehicle, eg 27C. If it reads 0C and the cabin is not freezing then there is a fault. The solution is to test the thermistor and aspirator function and then if necessary replace it. As this sensor is very similar to the In Cabin Air Temperature Sensor (N22/b1) in the Pushbutton Control Module (N22) see section [[Testing - In Cabin Air Temperature Sensor (N22/b1)]]. To replace it see section DIY Procedures - Overhead Control Panel (OCP) (N70) below.

	===Noisy Aspirator - Overhead Control Panel (OCP) (N70)===		===Noisy Aspirator - Overhead Control Panel (OCP) (N70)===
	Inside the Overhead Control Panel (OCP) (N70) is the aspirator which draws cabin air over a temperature sensor. This signal is used by the Automatic Climate Control (ACC) to condition the cabin space. Note air is also drawn over a temperature sensor in the ACC Pushbutton Cotrol Module also for ACC temperature control.		Inside the Overhead Control Panel (OCP) (N70) is the aspirator which draws cabin air over a temperature sensor. This signal is used by the Automatic Climate Control (ACC) to condition the cabin space. Note air is also drawn over a temperature sensor in the ACC Pushbutton Cotrol Module also for ACC temperature control.

Ricebubbles: Rewrote for clarity. Added cable diagrams.

2017-12-16T01:55:19Z

Rewrote for clarity. Added cable diagrams.

@@ Line 1: / Line 1: @@
 Back to: [[WIS 83.40 Automatic Climate Control (ACC) or Heating Ventilation and Air Conditioning (HVAC)]]
-== Removing Overhead Control Panel Control Module ==
+==Issues - Overhead Control Panel (OCP) (N70)==
-<!-- AR82.20-P-1000M, Removing and installing overhead control panel control module -->
+===Noisy Aspirator - Overhead Control Panel (OCP) (N70)===
+Inside the Overhead Control Panel (OCP) (N70) is the aspirator which draws cabin air over a temperature sensor. This signal is used by the Automatic Climate Control (ACC) to condition the cabin space. Note air is also drawn over a temperature sensor in the ACC Pushbutton Cotrol Module also for ACC temperature control.
-Excellent article by BenzWorld Member jwells at Post #8:
+A common issue is the aspirator housing rattles. The solution is to dismantle the OCP and add small blobs of silicon at the four corners to secure the aspirator shroud to the printed circuit board.
-http://www.benzworld.org/forums/w220-s-class/1460424-need-help-c-diag.html
+===Dirty Sensor and Aspirator - Overhead Control Panel (OCP) (N70)===
-'''Warning:''' Be aware that one of the OCP electrical connectors is particularly difficult to reinstall and if not done correctly can be a nightmare to diagnose.
+===Electrical Connector - Overhead Control Panel (OCP) (N70)===
 The connector can feel seated when it clicks into place but if not properly seated will give error codes and malfunctions.
 '''The Issue'''
-If you remove the OCP and remove the 5 electrical plugs, then reinstall the electrical plugs, you need to pay special attention to the second plug in from the left. It is the one with a light gray swing clip on it that you pull to the left to cause the plug to slide itself out. When plugging it back in, if you just plug it in and move the lever back to the right, it will not seat itself all the way back in.
+If you remove the OCP and remove the four or five electrical plugs (depending on model), then reinstall the electrical plugs, you need to pay special attention to the second plug in from the left. It is the one with a light gray swing clip on it that you pull to the left to cause the plug to slide itself out. When plugging it back in, if you just plug it in and move the lever back to the right, it will not seat itself all the way back in.
 It might look and feel like it is connected, but often it is not.
@@ Line 42: / Line 33: @@
 You MUST push in that second plug until it clicks in, then pull the lever back to the right to lock it in place. You will see on the black part of the plug a half circle tract that the light gray clip follows. The left side of that half circle must be right up against the module you are plugging into.

Pokseva: Removing Overhead Control Panel Control Module

2016-11-05T16:21:57Z

Removing Overhead Control Panel Control Module

@@ Line 1: / Line 1: @@
 Back to: [[WIS 83.40 Automatic Climate Control (ACC) or Heating Ventilation and Air Conditioning (HVAC)]]
 ==DIY Procedures - Overhead Control Panel (OCP) (N70)==
 ===DIY Dismantle and Repair - W220 2005 S500 OCP===

Ricebubbles: /* DIY Dismantle and Repair - W220 2005 S500 OCP */ Added issue and solution re OCP connector

2016-03-27T09:39:26Z

DIY Dismantle and Repair - W220 2005 S500 OCP: Added issue and solution re OCP connector

← Older revision		Revision as of 09:39, 27 March 2016
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	http://www.benzworld.org/forums/w220-s-class/1460424-need-help-c-diag.html		http://www.benzworld.org/forums/w220-s-class/1460424-need-help-c-diag.html

			'''Warning:''' Be aware that one of the OCP electrical connectors is particularly difficult to reinstall and if not done correctly can be a nightmare to diagnose.

			The connector can feel seated when it clicks into place but if not properly seated will give error codes and malfunctions.

			'''The Issue'''

			If you remove the OCP and remove the 5 electrical plugs, then reinstall the electrical plugs, you need to pay special attention to the second plug in from the left. It is the one with a light gray swing clip on it that you pull to the left to cause the plug to slide itself out. When plugging it back in, if you just plug it in and move the lever back to the right, it will not seat itself all the way back in.

			It might look and feel like it is connected, but often it is not.

			You will receive an error or malfunction warning saying "Light Sensor Visit Workshop", and it will cause three issues:
			* The headlights will stay on when in AUTO mode on the light switch, no matter if it is day or night.
			* The automatic headlight delayed shut off will not work in Auto mode, the lights just turn off when you turn off the key instead of having a delayed turn off.
			* The Rain Sensing wipers will not work in the first click position, they just act as intermittent wipers wiping every five seconds no matter how much rain is sensed.

			'''The Solution'''

			You MUST push in that second plug until it clicks in, then pull the lever back to the right to lock it in place. You will see on the black part of the plug a half circle tract that the light gray clip follows. The left side of that half circle must be right up against the module you are plugging into.

Ricebubbles at 23:38, 17 March 2015

2015-03-17T23:38:50Z

← Older revision		Revision as of 23:38, 17 March 2015
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	~~Refer~~ to: [[WIS 83.40 Automatic Climate Control (ACC) or Heating Ventilation and Air Conditioning (HVAC)]]		Back to: [[WIS 83.40 Automatic Climate Control (ACC) or Heating Ventilation and Air Conditioning (HVAC)]]
	==DIY Procedures - Overhead Control Panel (OCP) (N70)==		==DIY Procedures - Overhead Control Panel (OCP) (N70)==
	===DIY Dismantle and Repair - W220 2005 S500 OCP===		===DIY Dismantle and Repair - W220 2005 S500 OCP===

Ricebubbles at 22:52, 17 March 2015

2015-03-17T22:52:22Z

← Older revision		Revision as of 22:52, 17 March 2015
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	~~'''~~DIY W220 2005 S500 OCP ~~Dismantle and Repair'''~~		Refer to: [[WIS 83.40 Automatic Climate Control (ACC) or Heating Ventilation and Air Conditioning (HVAC)]]
			==DIY Procedures - Overhead Control Panel (OCP) (N70)==
			===DIY Dismantle and Repair - W220 2005 S500 OCP===

	Excellent article by BenzWorld Member jwells at Post #8:		Excellent article by BenzWorld Member jwells at Post #8:

	http://www.benzworld.org/forums/w220-s-class/1460424-need-help-c-diag.html		http://www.benzworld.org/forums/w220-s-class/1460424-need-help-c-diag.html

Ricebubbles: DIY W220 2005 S500 OCP Dismantle and Repair

2015-03-07T01:43:07Z

DIY W220 2005 S500 OCP Dismantle and Repair

New page

'''DIY W220 2005 S500 OCP Dismantle and Repair'''

Excellent article by BenzWorld Member jwells at Post #8:

http://www.benzworld.org/forums/w220-s-class/1460424-need-help-c-diag.html