Coolant Circulation Pump - Revision history

Pokseva: /* Diagnosis - Coolant Circulation Pump */ diagnosis in DAS

2016-11-19T21:06:56Z

Diagnosis - Coolant Circulation Pump: diagnosis in DAS

← Older revision		Revision as of 21:06, 19 November 2016
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	* Note: error code B1416 is thrown if coolant circulation pump draws >5A current.		* Note: error code B1416 is thrown if coolant circulation pump draws >5A current.

			{\|
			\|[[File:DAS_check_coolant_circulation_pump_1.jpg\|thumb\|none\|Diagnosis in [[DAS]].]]
			\|[[File:DAS_check_coolant_circulation_pump_2.jpg\|thumb\|none\|Diagnosis in [[DAS]].]]
			\|}

	==Testing - Coolant Circulation Pump==		==Testing - Coolant Circulation Pump==

Pokseva: /* Diagnosis - Coolant Circulation Pump */ error code added

2016-11-19T20:55:05Z

Diagnosis - Coolant Circulation Pump: error code added

← Older revision		Revision as of 20:55, 19 November 2016
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	==Diagnosis - Coolant Circulation Pump==		==Diagnosis - Coolant Circulation Pump==
	* Error ~~code:~~ B1416 "The component or the signal line to the component A31m1 (~~coolant~~ circulation pump) has ~~short~~ circuit to positive or ~~overload~~."		{\| class="wikitable"
			! Error Code
			! Description
			\|-
			\|B1416
			\|The component or the signal line to the component A31m1 (Coolant circulation pump) has Short circuit to positive or Overload.
			\|}

	* Note: error code B1416 is thrown if coolant circulation pump draws >5A current.		* Note: error code B1416 is thrown if coolant circulation pump draws >5A current.

Ricebubbles: /* DIY Renew Brushes in Duovalve Circulation Pump */

2016-11-18T09:45:30Z

DIY Renew Brushes in Duovalve Circulation Pump

← Older revision		Revision as of 09:45, 18 November 2016
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	Repeat for the other cotton loop thus freeing both brushes to contact the commutator.		Repeat for the other cotton loop thus freeing both brushes to contact the commutator.

	Do a bench test of the Circulation Pump Motor. It should draw about 0.4A at 12V DC ie about 5W. (Note: Do this test BEFORE crimping the motor tabs just in case you need to open up the pump again.)		Do a bench test of the Circulation Pump Motor. (Note: The Pump End Plate is marked with a '+' sign. It is shown on the right (red lead) in the next Figure.) It should draw about 0.4A at 12V DC ie about 5W. (Note: Do this test BEFORE crimping the motor tabs just in case you need to open up the pump again.)
	[[File:W220 ACC Circulation Pump Motor Bench Test.JPG\|400px\|center]]		[[File:W220 ACC Circulation Pump Motor Bench Test.JPG\|400px\|center]]

Ricebubbles: /* DIY Renew Brushes in Duovalve Circulation Pump */ Added brush re-installation method picture

2016-11-18T09:35:42Z

DIY Renew Brushes in Duovalve Circulation Pump: Added brush re-installation method picture

← Older revision		Revision as of 09:35, 18 November 2016
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	Hook the cotton loop over the curved end of the brush retaining spring and wrap the other end around the End Plate body.		Hook the cotton loop over the curved end of the brush retaining spring and wrap the other end around the End Plate body.
			[[File:W220 ACC Circulation Pump New Brush Assembly Method.JPG\|300px\|center]]

	Repeat for the other brush.		Repeat for the other brush.
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	Repeat for the other cotton loop thus freeing both brushes to contact the commutator.		Repeat for the other cotton loop thus freeing both brushes to contact the commutator.

	Do a bench test of the Circulation Pump Motor. It should draw about 0.4A at 12V DC ie about 5W. (Note: Do this test BEFORE crimping the motor tabs.		Do a bench test of the Circulation Pump Motor. It should draw about 0.4A at 12V DC ie about 5W. (Note: Do this test BEFORE crimping the motor tabs just in case you need to open up the pump again.)
	[[File:W220 ACC Circulation Pump Motor Bench Test.JPG\|400px\|center]]		[[File:W220 ACC Circulation Pump Motor Bench Test.JPG\|400px\|center]]

	Using a centre punch crimp the tabs in place to hold the End Plate on the Motor.		Using a centre punch crimp the tabs in place to hold the End Plate on the Motor.

			Reassemble the Circulation Pump to the Duo Valve Assembly and mount in the car. (A small amount of silicon grease on the anti-vibration mounts allows them to slide onto the mounting plate easily.)

	===Repair a Seized Coolant Circulation Pump===		===Repair a Seized Coolant Circulation Pump===

Ricebubbles: /* DIY Renew Brushes in Duovalve Circulation Pump */ Added more detail.

2016-11-18T09:22:55Z

DIY Renew Brushes in Duovalve Circulation Pump: Added more detail.

@@ Line 39: / Line 39: @@
 ==DIY Procedures - Coolant Circulation Pump==
 ===DIY Renew Brushes in Duovalve Circulation Pump===
-Remove the Duo Valve Assembly from the car. (See above DIY Methods for procedure.)
+Mark the wiper blade positions (parked) on masking tape on the windscreen.
 [[File:W220 ACC Circulation Pump Motor Showing End Plate.JPG|400px|center]]

Ricebubbles: /* Parts - Coolant Circulation Pump */

2016-11-18T09:11:52Z

Parts - Coolant Circulation Pump

← Older revision		Revision as of 09:11, 18 November 2016
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	==Parts - Coolant Circulation Pump==		==Parts - Coolant Circulation Pump==
	* 0 392 020 066" or 0392020066		* 0 392 020 066 or 0392020066
	* A2208350064		* A2208350064

Ricebubbles: /* DIY Procedures - Coolant Circulation Pump */ Moved from Duo Valve Section.

2016-11-18T08:39:06Z

DIY Procedures - Coolant Circulation Pump: Moved from Duo Valve Section.

@@ Line 38: / Line 38: @@
 ==DIY Procedures - Coolant Circulation Pump==
-===Repair - Coolant Circulation Pump===
+===DIY Renew Brushes in Duovalve Circulation Pump===
 Acknowledgement of contribution by BenzWorld Member, Pokseva.
 Refer to: http://www.benzworld.org/forums/showthread.php?t=1271866http://www.benzworld.org/forums/w210-e-class/1570724-my-attempt-replacing-transmission-plug.html

Ricebubbles: /* Issues - Coolant Circulation Pump */ Moved from Duo Valve Section.

2016-11-18T08:26:40Z

Issues - Coolant Circulation Pump: Moved from Duo Valve Section.

← Older revision		Revision as of 08:26, 18 November 2016
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	==Issues - Coolant Circulation Pump==		==Issues - Coolant Circulation Pump==
			A common issue is a failed circulation pump which is part of the Duo Valve Assembly.
	* It may be hard to notice that your coolant circulation pump (A31/m1) is not working properly.		* It may be hard to notice that your coolant circulation pump (A31/m1) is not working properly.
	* If the pump is dead, then in cold weather the car could not be heated more than 30C even if ACC was set to "HI".		* If the pump is dead, then in cold weather the car could not be heated more than 30C even if ACC was set to "HI".
			* Another indication is the lack of heating when the residual heat option is activated with the engine off although heating is available with the engine running. To see how to activate the residual heat option go to the Section "Residual Heating/Cooling" under Heading "Function - Automatic Climate Control (ACC)" in
			[[WIS 83.40 Automatic Climate Control (ACC) or Heating Ventilation and Air Conditioning (HVAC)]]

			Several failure mechanisms are possible for a failed circulation pump including;
			* Blown or damaged electrical circuit supplying power to the Circulation Pump.
			* Seized Circulation Pump.
			* Worn brushes in the Circulation Pump Motor.

			The next figure shows an example of a Coolant Circulation Pump with very badly worn brushes.
			[[File:W220 ACC Circulation Pump with Worn Brushes with Annotation.JPG\|400px\|center]]

			A new pump is expensive (about US$200) but a DIY fix is possible if the failure is due to worn brushes. See below.

	==Parts - Coolant Circulation Pump==		==Parts - Coolant Circulation Pump==

Ricebubbles at 23:40, 17 March 2015

2015-03-17T23:40:32Z

← Older revision		Revision as of 23:40, 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)]]
	==Description - Coolant Circulation Pump==		==Description - Coolant Circulation Pump==
	The Coolant Circulation Pump (A31/m1) is also known as - "Auxiliary Water Pump".		The Coolant Circulation Pump (A31/m1) is also known as - "Auxiliary Water Pump".

Ricebubbles at 23:10, 17 March 2015

2015-03-17T23:10:54Z

← Older revision		Revision as of 23:10, 17 March 2015
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	~~Acknowledgement of contribution by BenzWorld Member, Pokseva~~.		Refer to: [[WIS 83.40 Automatic Climate Control (ACC) or Heating Ventilation and Air Conditioning (HVAC)]]
			==Description - Coolant Circulation Pump==
	~~'''Issue with~~ Coolant Circulation Pump (A31/m1)~~'''~~		The Coolant Circulation Pump (A31/m1) is also known as - "Auxiliary Water Pump".

	~~It may be hard to notice that your "coolant circulation pump" (~~also known as - "Auxiliary Water Pump~~", "0 392 020 066" or 0392020066, A2208350064, A31m1) is not working properly.~~

	~~I have finally found that my pump was dead, and in cold weather my car could not be heated more than 30C even if AC was set to "HI~~".

	~~'''Diagnosis:'''~~		Edit required.

	~~When reading error codes with STAR I got this error code:~~		==Issues - Coolant Circulation Pump==
	~~"B1416 The component or the signal line~~ to ~~the component A31m1 (Coolant~~ circulation pump) ~~has Short circuit~~ to ~~positive or Overload~~."		* It may be hard to notice that your coolant circulation pump (A31/m1) is not working properly.
			* If the pump is dead, then in cold weather the car could not be heated more than 30C even if ACC was set to "HI".

	~~As it turns out B1416 error code is thrown if coolant circulation pump draws >5A current.~~		==Parts - Coolant Circulation Pump==
			* 0 392 020 066" or 0392020066
			* A2208350064

	~~'''Testing~~:~~'''~~		==Diagnosis - Coolant Circulation Pump==
			* Error code: B1416 "The component or the signal line to the component A31m1 (coolant circulation pump) has short circuit to positive or overload."
			* Note: error code B1416 is thrown if coolant circulation pump draws >5A current.

	I removed the pump and connected it to 12V DC. The pump did not spin at all (it was completely stuck and I could not rotate it even by hand) and the multimeter showed that it consumed 5.5A current.		==Testing - Coolant Circulation Pump==
			* I removed the pump and connected it to 12V DC. The pump did not spin at all (it was completely stuck and I could not rotate it even by hand) and the multimeter showed that it consumed 5.5A current.

	'''Conclusion:'''		'''Conclusion:'''
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	While you can buy a brand new pump for 140 EUR you might as well try to repair it. The reference shows how you can do it.		While you can buy a brand new pump for 140 EUR you might as well try to repair it. The reference shows how you can do it.

	http://www.benzworld.org/forums/showthread.php?t=1271866http://www.benzworld.org/forums/w210-e-class/1570724-my-attempt-replacing-transmission-plug.html		==DIY Procedures - Coolant Circulation Pump==
			===Repair - Coolant Circulation Pump===
			Acknowledgement of contribution by BenzWorld Member, Pokseva.

			Refer to: http://www.benzworld.org/forums/showthread.php?t=1271866http://www.benzworld.org/forums/w210-e-class/1570724-my-attempt-replacing-transmission-plug.html