Error Code - EGR
10-14-2002, 09:44 AM
#11
Senior Member
Join Date: Sep 2002
Location: Dixon Ca
Posts: 152
Originally Posted by blaze08' date='Oct 12 2002, 10:51 PM
Do we really need that EGR. What happens if we do put a relay in it and how?
im out sully
:rice:
10-14-2002, 09:55 AM
#12
Senior Member
Join Date: Sep 2002
Location: Dixon Ca
Posts: 152
answer:
With some help from spooledUP7, I have sucess using a relay to trick the ECU to think that the EGR is present! In other words, no more codes! Here is what I did.
1. Remove EGR and use a block off plate - make sure that you keep track of the wiring that originally goes to the EGR valve.
2. You need to get at the solenoid under the UIM. Note the soleniod we are talking about is the 4th one from the front of the car. I believe that it is yellow in color. If you want to make sure, please refer to any vacuum diagram that you have access to. To get at the soleniod, so I found it easier to just remove the UIM.
3. Okay now for the wiring: EGR side - The harness from the EGR needs to be tied to pins 87a and 30 of the relay. Any standard 12v relay will do. To make sure, putting a meter on these pins will give you continuity. Attach couple of female spades to the wiring an hook it to the relay.
4. Solenoid side (under the UIM) - disconnect the solenoid harness and then use 2 male spade connectors to tap into the female side of the solenoid harness. Polarity does not matter. The other side of this connection goes to pins 85 and 86 of the relay. Pin 87 of the relay does not come into play so leave it alone.
5. That is basically it. Mount the relay, reinstall the UIM and you're finished. Now would be a good time to do the hoses.
Here is how it works. With the EGR harness connected to 87a and 30, the EGR has continuity. When there is a signal from the ECU to open the EGR circuit and the relay switches from the 30/87a connection to 30/87. Since 87 is not connected there is no harm done and the ECU is tricked into thinking the EGR valve is there. Basically, the ECU believes that the relay is the EGR valve itself.
these are the instructions i used. i know they work. follow them and your in. take it easy sully
With some help from spooledUP7, I have sucess using a relay to trick the ECU to think that the EGR is present! In other words, no more codes! Here is what I did.
1. Remove EGR and use a block off plate - make sure that you keep track of the wiring that originally goes to the EGR valve.
2. You need to get at the solenoid under the UIM. Note the soleniod we are talking about is the 4th one from the front of the car. I believe that it is yellow in color. If you want to make sure, please refer to any vacuum diagram that you have access to. To get at the soleniod, so I found it easier to just remove the UIM.
3. Okay now for the wiring: EGR side - The harness from the EGR needs to be tied to pins 87a and 30 of the relay. Any standard 12v relay will do. To make sure, putting a meter on these pins will give you continuity. Attach couple of female spades to the wiring an hook it to the relay.
4. Solenoid side (under the UIM) - disconnect the solenoid harness and then use 2 male spade connectors to tap into the female side of the solenoid harness. Polarity does not matter. The other side of this connection goes to pins 85 and 86 of the relay. Pin 87 of the relay does not come into play so leave it alone.
5. That is basically it. Mount the relay, reinstall the UIM and you're finished. Now would be a good time to do the hoses.
Here is how it works. With the EGR harness connected to 87a and 30, the EGR has continuity. When there is a signal from the ECU to open the EGR circuit and the relay switches from the 30/87a connection to 30/87. Since 87 is not connected there is no harm done and the ECU is tricked into thinking the EGR valve is there. Basically, the ECU believes that the relay is the EGR valve itself.
these are the instructions i used. i know they work. follow them and your in. take it easy sully
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