00538 - Revision history

Dana: /* Special Notes */

2017-10-30T15:51:37Z

Special Notes

← Older revision		Revision as of 15:51, 30 October 2017
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	* When found in Control Module for Heating/Climate Control (J255/J301):		* When found in Control Module for Heating/Climate Control (J255/J301):
	** Disconnect the electrical Connectors to the Position Sensors one after another, erase Fault Codes and check Fault Codes again. If the "Reference Voltage" Fault Code is no longer recognized (and the Fault Code for the reappears after reconnecting), the applicable Flap Motor/Position Sensor must be replaced.		** Disconnect the electrical Connectors to the Position Sensors one after another, erase Fault Codes and check Fault Codes again. If the "Reference Voltage" Fault Code is no longer recognized (and the Fault Code for the reappears after reconnecting), the applicable Flap Motor/Position Sensor must be replaced.
			*** When additional components such as G107 (sunlight sensor) are on the same 5V reference voltage supply make sure to unplug all sensors while troubleshooting using this method.

	=== 00538 - Reference Voltage : Faulty ===		=== 00538 - Reference Voltage : Faulty ===

Dana at 18:25, 23 September 2016

2016-09-23T18:25:04Z

← Older revision		Revision as of 18:25, 23 September 2016
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	* When found in Central Electronics Control Module (J519):		* When found in Central Electronics Control Module (J519):
	** Specifically check the (Ground) Wiring from the Central Electronics Control Module (J519) to the Battery.		** Specifically check the (Ground) Wiring from the Central Electronics Control Module (J519) to the Battery.
			* When found in the Central Electronics / Body Control Module (BCM) in a [[VW Jetta (16/AJ) \| (16/AJ) chassis Jetta]] check fuse SB19.
	[[Category:Fault Codes]]		[[Category:Fault Codes]]
	__FORCETOC__		__FORCETOC__

RtWiKiSyS0p at 11:23, 11 March 2011

2011-03-11T11:23:48Z

← Older revision		Revision as of 11:23, 11 March 2011
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	~~__FORCETOC__~~		== 00538 - Reference Voltage ==
	== 00538 - Reference ~~voltage~~ ==

	=== 00538 - Reference ~~voltage~~ : Signal too large ===		=== 00538 - Reference Voltage : Signal too large ===
	=== 00538 - Reference ~~voltage~~ : Signal too small ===		=== 00538 - Reference Voltage : Signal too small ===

	==== Possible ~~Cause~~ ====		==== Possible Causes ====

	* ~~Short circuit~~ or ~~open circuit in wiring~~ or ~~connectors. Pay special attention~~ to ~~the wires from contact 8 of connector housing T16b on Climatronic control module -~~J255~~- to flap motors.<br>~~		* Common Causes
			** Fuse(s) faulty
			** Wiring and/or Connector(s) from/to Control Module faulty
			** Control Module faulty
			* Heating/Climate Control specific Causes
			** Fuse(s) faulty
			** Wiring and/or Connector(s) from/to Control Module for Heating/Climate Control (J255/J301) faulty
			** Flap Motor/Position Sensor faulty
			** Control Module for Heating/Climate Control (J255/J301) faulty

	==== Possible Solutions ====		==== Possible Solutions ====

	* Check ~~wiring~~ and ~~connectors~~ to ~~control module using wiring diagram<br>~~		* Common Solutions
	* Check ~~function of flap motors~~ for ~~regulating air conditioner using function 03~~ Output ~~Diagnostic~~ Test ~~Mode~~ (~~DTM~~)~~.<br>~~		** Check/Replace Fuse(s)
			** Check/Repair Wiring and/or Connector(s) from/to Control Module
			** Check/Replace Control Module
			* Heating/Climate Control specific Solutions
			** Check/Replace Fuse(s)
			** Check/Repair Wiring and/or Connector(s) from/to Control Module for Heating/Climate Control (J255/J301)
			** Check/Replace Flap Motor/Position Sensor
			*** Perform Output Test
			** Control Module for Heating/Climate Control (J255/J301)

	==== ~~Possible Cause~~ ====		==== Special Notes ====

	* ~~Flap position sensors -G92-~~, ~~-G112-~~, ~~-G113- or -G114- malfunctioning~~. ~~<br>~~		* When found in Control Module for Heating/Climate Control (J255/J301):
			** Disconnect the electrical Connectors to the Position Sensors one after another, erase Fault Codes and check Fault Codes again. If the "Reference Voltage" Fault Code is no longer recognized (and the Fault Code for the reappears after reconnecting), the applicable Flap Motor/Position Sensor must be replaced.

	~~==== Possible Solutions ====~~

	* Disconnect electrical connectors to listed sensors one after another, erase DTC memory and check DTC memory again. If the "Reference ~~voltage" malfunction is no longer recognized (and the DTC reappears after reconnecting), the applicable flap motor must be replaced.<br>~~		=== 00538 - Reference Voltage : Faulty ===

	==== Possible ~~Cause~~ ====		==== Possible Causes ====

	* Control ~~module malfunctioning. <br>~~		* Fuse(s) faulty
			* Wiring and/or Connector(s) from/to Battery faulty
			* Control Module faulty

	==== Possible Solutions ====		==== Possible Solutions ====

	* Replace ~~control module if necessary~~. ~~<br>~~		* Check Fuse(s)
			* Check Wiring and/or Connector(s) from/to Battery
			* Check/Replace Control Module

			==== Special Notes ====

			* When found in Central Electronics Control Module (J519):
			** Specifically check the (Ground) Wiring from the Central Electronics Control Module (J519) to the Battery.

	[[Category:Fault Codes]]		[[Category:Fault Codes]]
			__FORCETOC__

Uwe at 17:48, 22 November 2005

2005-11-22T17:48:49Z

New page

__FORCETOC__
== 00538 - Reference voltage ==

=== 00538 - Reference voltage : Signal too large ===
=== 00538 - Reference voltage : Signal too small ===

==== Possible Cause ====

* Short circuit or open circuit in wiring or connectors. Pay special attention to the wires from contact 8 of connector housing T16b on Climatronic control module -J255- to flap motors. 

==== Possible Solutions ====

* Check wiring and connectors to control module using wiring diagram 
* Check function of flap motors for regulating air conditioner using function 03 Output Diagnostic Test Mode (DTM). 

==== Possible Cause ====

* Flap position sensors -G92-, -G112-, -G113- or -G114- malfunctioning. 

==== Possible Solutions ====

* Disconnect electrical connectors to listed sensors one after another, erase DTC memory and check DTC memory again. If the "Reference voltage" malfunction is no longer recognized (and the DTC reappears after reconnecting), the applicable flap motor must be replaced. 

==== Possible Cause ====

* Control module malfunctioning. 

==== Possible Solutions ====

* Replace control module if necessary. 

[[Category:Fault Codes]]