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Volkswagen Jetta, Golf, GTI: 1999-2005, R32: 2004 (A4) 2001 volkswagen jetta vr6


Permlink Replies: 10 - Pages: 1
Last Post: May 31, 2011 10:25 AM Last Post By: combi valve
mechanic mike

Posts: 6
Registered: 03/29/10
2001 volkswagen jetta vr6
Posted: Mar 29, 2010 7:30 PM
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code po 413 secondary air valve a circuit open have no power to air injection pump
FKH161

Posts: 7,622
Registered: 12/29/05
Re: 2001 volkswagen jetta vr6
Posted: Mar 29, 2010 10:25 PM   in response to: mechanic mike in response to: mechanic mike
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The air pump gets power from the air pump relay.

The code you listed, is for the solenoid valve that directs vacuum to the combi valve. Check the harness plug at the combi valve for broken wires/bad connection.

A problem with the solenoid or wires, should not affect power to the air pump.

Check the air pump fuse and the air pump relay if the pump still does not work.
FKH161

Posts: 7,622
Registered: 12/29/05
Re: 2001 volkswagen jetta vr6
Posted: Mar 29, 2010 10:38 PM   in response to: FKH161 in response to: FKH161
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See attached image...

#1 - combi valve
#5 - vacuum switching solenoid valve
#8 - harness plug for solenoid valve
#19 - air pump
mechanic mike

Posts: 6
Registered: 03/29/10
Re: 2001 volkswagen jetta vr6
Posted: Mar 30, 2010 5:17 PM   in response to: FKH161 in response to: FKH161
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i have power to relay and power from relay to valve im thinking ecm is not energizing relay to turn on pump but no power to pump im stuck
FKH161

Posts: 7,622
Registered: 12/29/05
Re: 2001 volkswagen jetta vr6
Posted: Mar 30, 2010 9:34 PM   in response to: mechanic mike in response to: mechanic mike
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Have you tried bypassing the relay to see if the pump actually works? Or attached power & ground directly at the pump? These pumps can sometimes seize-up due to condensation build-up.

Have you got access to VAG-COM (VCDS)? With it, you can tell the ECM to perform an "output test" on the pump to see if it is able to trigger the pump.

Attached is a wiring diagram.

  • The 50A fuse for the air pump is on top of the battery (circled in red).
  • N112 (green), is the vacuum solenoid for the combi valve.
  • According to your code, the ECM detected an issue with the wiring or valve.
  • Make sure the wiring & the valve are OK
  • The blue line is the control side of the relay.

  • Remove the relay
  • Make sure you have power at #30
  • Bridge #30 & #87, the pump should run, if no, check pump ground. ground ok replace pump.
  • Attach a test light to #86
  • Start engine and let run till warm (light may or may not light up)
  • Clear codes (even if no codes are present), light should light up shortly.
  • if no, check wiring from relay pin #86 to ECM pin #46
mechanic mike

Posts: 6
Registered: 03/29/10
Re: 2001 volkswagen jetta vr6
Posted: Apr 1, 2010 9:22 PM   in response to: FKH161 in response to: FKH161
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to fkh161 thank you for your tips and advice i found that the wire from ecm to relay has no power i cut wire and powered up relay and air pump runs im going to get aused computer also the connector plug at ecm is butchered up someone was in therei will let yo know again thank you mechanic mike
mechanic mike

Posts: 6
Registered: 03/29/10
Re: 2001 volkswagen jetta vr6
Posted: Apr 2, 2010 7:01 PM   in response to: mechanic mike in response to: mechanic mike
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to fkh 161 follow up on 2001 jetta vr6 i tested the wire coming out from computer that goes directly to air pump relay my power probe reads 3.5 volts i believe computer is not signaling relay with battery voltage i have ground and power at combi valve and ground only at air pump by cutting wire coming out of computer i can power up relay and pump works what do you think computer is bad or maybe connector to ecm?
mechanic mike

Posts: 6
Registered: 03/29/10
Re: 2001 volkswagen jetta vr6
Posted: Apr 2, 2010 7:01 PM   in response to: mechanic mike in response to: mechanic mike
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to fkh 161 follow up on 2001 jetta vr6 i tested the wire coming out from computer that goes directly to air pump relay my power probe reads 3.5 volts i believe computer is not signaling relay with battery voltage i have ground and power at combi valve and ground only at air pump by cutting wire coming out of computer i can power up relay and pump works what do you think computer is bad or maybe connector to ecm?
FKH161

Posts: 7,622
Registered: 12/29/05
Re: 2001 volkswagen jetta vr6
Posted: Apr 2, 2010 7:25 PM   in response to: mechanic mike in response to: mechanic mike
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The ECM will only trigger the relay at specific times, so you may not see correct voltage at the relay control wire when you check it.

You can not guess that the ECM is bad simply because the relay is not being triggered, this is why it is best to use a scan tool with which you can tell the ECM to trigger the pump. If the ECM can trigger the pump when "asked to", then the ECM is OK.

Post your location and someone reading this forum who has VAG-COM (VCDS) might be able to lend you a hand.

You can also find someone in your area via the locator website:

http://vagcomlocator.com/tinc?key=cSZEvUVt&formname=VAGCOM
post master

Posts: 1
Registered: 07/06/10
Re: 2002 volkswagen jetta vr6
Posted: Jul 6, 2010 12:14 AM   in response to: mechanic mike in response to: mechanic mike
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my 2002 volkswagen jetter fail the emission test due to code po413 the secondary air system swcthing valve a circuit open. where is the location of the secondary air system i want to replace it.
combi valve

Posts: 1
Registered: 05/31/11
Re: 2001 volkswagen jetta vr6
Posted: May 31, 2011 10:25 AM   in response to: FKH161 in response to: FKH161
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Old thread I know but I'm looking for the attachment you attached showing where the combination valve is. Thanks!

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