How to Repair Relay Control Module (RCM) - (Mystery no Start)
re: How to Repair Relay Control Module (RCM) - (Mystery no Start)
Originally Posted by Joliet John
Also, be aware of the wattage of your soldering iron/gun. When working on PCB's, you want to avoid overheating the board or components.
Definitely avoid solder intended for plumbing as it will be lead free and have a higher melt temp.
Definitely avoid solder intended for plumbing as it will be lead free and have a higher melt temp.
re: How to Repair Relay Control Module (RCM) - (Mystery no Start)
We have a loaner RCM. PM me your address and I'll send you a loaner RCM. Once received you send me your RCM. I repair it and hold it as a loaner for the next person in need.
If you want "your" RCM back it will involve another swap at your expense (postage).
Let me know!
DJ
If you want "your" RCM back it will involve another swap at your expense (postage).
Let me know!
DJ
Originally Posted by crossfirewannabe2
I would like to send you my rcm for repair but
I cant go without it , however I would still like to send you $20 for patience and help. How do I do this ?
Until I get this rcm fixed, is there any secret to restarting the car. Im almost afraid to drive anywhere, eventhough its only died on me one time.
I cant go without it , however I would still like to send you $20 for patience and help. How do I do this ?
Until I get this rcm fixed, is there any secret to restarting the car. Im almost afraid to drive anywhere, eventhough its only died on me one time.
re: How to Repair Relay Control Module (RCM) - (Mystery no Start)
Originally Posted by crossfirewannabe2
I would like to send you my rcm for repair but
I cant go without it , however I would still like to send you $20 for patience and help. How do I do this ?
Until I get this rcm fixed, is there any secret to restarting the car. Im almost afraid to drive anywhere, eventhough its only died on me one time.
I cant go without it , however I would still like to send you $20 for patience and help. How do I do this ?
Until I get this rcm fixed, is there any secret to restarting the car. Im almost afraid to drive anywhere, eventhough its only died on me one time.
re: How to Repair Relay Control Module (RCM) - (Mystery no Start)
Originally Posted by onehundred80
Some or most solder for electronics is lead free these days. In Europe I think it is banned already.
I still have a bunch of 60/40 I use on electronics, and pretty much everything else, so I haven't had to buy any in a very long time.
re: How to Repair Relay Control Module (RCM) - (Mystery no Start)
Originally Posted by Joliet John
I've been out of the solder business for quite a while, but there was a lot of hell being raised about lead even then. I know one of the issues we had with researching a lead free alternative was the higher melt temps of lead free alloys. At the time, we were leaning more towards figuring out a good conductive adhesive.
I still have a bunch of 60/40 I use on electronics, and pretty much everything else, so I haven't had to buy any in a very long time.
I still have a bunch of 60/40 I use on electronics, and pretty much everything else, so I haven't had to buy any in a very long time.
We older geezers were weaned on leaded products, paint, gasoline etc. It did not harm us, now people suffer from all sorts of medical diagnoses etc that we did not.
re: How to Repair Relay Control Module (RCM) - (Mystery no Start)
Originally Posted by onehundred80
You have a hard time finding something as good as the leaded solders.
We older geezers were weaned on leaded products, paint, gasoline etc. It did not harm us, now people suffer from all sorts of medical diagnoses etc that we did not.
We older geezers were weaned on leaded products, paint, gasoline etc. It did not harm us, now people suffer from all sorts of medical diagnoses etc that we did not.
re: How to Repair Relay Control Module (RCM) - (Mystery no Start)
Has anyone ever took a deep down look at the schematic and try to figure out why the RCM failure causes the engine not to crank? I’ve been looking at the schematics, and assuming the only problem connector is the one shown in the how to (Connector A), I can’t see how this would cause the engine not to crank. Here are what the four pins do on connector A:
Pin 1: Air Pump Relay Control
Pin 2: Fuel Injectors, MAF, Camshaft Position Sensor
Pin 3: Upstream Oxygen Sensors, Air Pump Switchover Solenoid, EGR Solenoid, Short Runner Valve Solenoid
Pin 4: Air Pump Output
Obviously, if either pin 2 or 3 fails, which are the pins shown in earlier pictures, that will stall the engine due to the loss of sensors, injectors, etc. What I don't understand is how this prevents the engine from cranking. It seems like pin 4 in connector B would cause a no crank situation, as that would cut power to all the relays in the RCM.
If this has been covered before, please let me know. I had this happen to me recently and would just like to know a little bit more about how the RCM actually works. Without this thread I probably wouldn't have known what was going on when the car died on me.
Thanks,
-Dan-
Pin 1: Air Pump Relay Control
Pin 2: Fuel Injectors, MAF, Camshaft Position Sensor
Pin 3: Upstream Oxygen Sensors, Air Pump Switchover Solenoid, EGR Solenoid, Short Runner Valve Solenoid
Pin 4: Air Pump Output
Obviously, if either pin 2 or 3 fails, which are the pins shown in earlier pictures, that will stall the engine due to the loss of sensors, injectors, etc. What I don't understand is how this prevents the engine from cranking. It seems like pin 4 in connector B would cause a no crank situation, as that would cut power to all the relays in the RCM.
If this has been covered before, please let me know. I had this happen to me recently and would just like to know a little bit more about how the RCM actually works. Without this thread I probably wouldn't have known what was going on when the car died on me.
Thanks,
-Dan-
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re: How to Repair Relay Control Module (RCM) - (Mystery no Start)
Originally Posted by TurboDan
Has anyone ever took a deep down look at the schematic and try to figure out why the RCM failure causes the engine not to crank? I’ve been looking at the schematics, and assuming the only problem connector is the one shown in the how to (Connector A), I can’t see how this would cause the engine not to crank. Here are what the four pins do on connector A:
Pin 1: Air Pump Relay Control
Pin 2: Fuel Injectors, MAF, Camshaft Position Sensor
Pin 3: Upstream Oxygen Sensors, Air Pump Switchover Solenoid, EGR Solenoid, Short Runner Valve Solenoid
Pin 4: Air Pump Output
Obviously, if either pin 2 or 3 fails, which are the pins shown in earlier pictures, that will stall the engine due to the loss of sensors, injectors, etc. What I don't understand is how this prevents the engine from cranking. It seems like pin 4 in connector B would cause a no crank situation, as that would cut power to all the relays in the RCM.
If this has been covered before, please let me know. I had this happen to me recently and would just like to know a little bit more about how the RCM actually works. Without this thread I probably wouldn't have known what was going on when the car died on me.
Thanks,
-Dan-
Pin 1: Air Pump Relay Control
Pin 2: Fuel Injectors, MAF, Camshaft Position Sensor
Pin 3: Upstream Oxygen Sensors, Air Pump Switchover Solenoid, EGR Solenoid, Short Runner Valve Solenoid
Pin 4: Air Pump Output
Obviously, if either pin 2 or 3 fails, which are the pins shown in earlier pictures, that will stall the engine due to the loss of sensors, injectors, etc. What I don't understand is how this prevents the engine from cranking. It seems like pin 4 in connector B would cause a no crank situation, as that would cut power to all the relays in the RCM.
If this has been covered before, please let me know. I had this happen to me recently and would just like to know a little bit more about how the RCM actually works. Without this thread I probably wouldn't have known what was going on when the car died on me.
Thanks,
-Dan-
re: How to Repair Relay Control Module (RCM) - (Mystery no Start)
Couldn't agree more with that last post. My thanks to DJ for the tutorial. I finally got around to pulling the RCM and did the resolder and the "me so horny" mod. I must admit, I was a bit nervous. With my mitts for hands, this was tedious but I got er done! I owe you more than just one beer DJ, I hope I get the pleasure one day to meet up at a GTG and buy you a few. Thanks again! Bob
re: How to Repair Relay Control Module (RCM) - (Mystery no Start)
Maybe at the Colorado GTG!? You going?
Finding more and more reasons to not, not go. Was concerned cuz of the restaurant and divorce thingy but free beer and a color change (grey for blue SRTs) is just about enough reason to go!
Finding more and more reasons to not, not go. Was concerned cuz of the restaurant and divorce thingy but free beer and a color change (grey for blue SRTs) is just about enough reason to go!
re: How to Repair Relay Control Module (RCM) - (Mystery no Start)
Originally Posted by tighed1
Maybe at the Colorado GTG!? You going?
Finding more and more reasons to not, not go. Was concerned cuz of the restaurant and divorce thingy but free beer and a color change (grey for blue SRTs) is just about enough reason to go!
Finding more and more reasons to not, not go. Was concerned cuz of the restaurant and divorce thingy but free beer and a color change (grey for blue SRTs) is just about enough reason to go!
re: How to Repair Relay Control Module (RCM) - (Mystery no Start)
Thanks Tighed1 for coaching us thru the fix for this problem with great pics and instructions. After being towed from a no start and then loosing power driving one time too many I followed thru with the fix and all is well now for problem free cruising! I surprised some of my colleagues when I told them that I fix it myself. I thank my mechanic Dad for insisting girls have some mechanical knowledge and the confidence to tackle the task!
Lori-Ann
Lori-Ann
re: How to Repair Relay Control Module (RCM) - (Mystery no Start)
Over the past few weeks the Check engine light has been coming on and off so I finally brought it up to the dealership to have it checked out. The guy just called me back and said the relay control box needed to be replaced and it was going to be $604. When he says relay control box I assume he is meaning the module, is this soldering solution one that would fix my problem?
re: How to Repair Relay Control Module (RCM) - (Mystery no Start)
Originally Posted by xscape
Over the past few weeks the Check engine light has been coming on and off so I finally brought it up to the dealership to have it checked out. The guy just called me back and said the relay control box needed to be replaced and it was going to be $604. When he says relay control box I assume he is meaning the module, is this soldering solution one that would fix my problem?
The solder fix basically fixes random (and sometimes permanent) stalling. From what you have said this does not seem to be the problem. You may have air pump relay problems caused by burnt contacts, but with no code given so that is just a guess.
You should have got the code(s) and posted them before going to the stealership.
re: How to Repair Relay Control Module (RCM) - (Mystery no Start)
Originally Posted by onehundred80
What is the code that has been set? Without the code an accurate reply is not possible.
The solder fix basically fixes random (and sometimes permanent) stalling. From what you have said this does not seem to be the problem. You may have air pump relay problems caused by burnt contacts, but with no code given so that is just a guess.
You should have got the code(s) and posted them before going to the stealership.
The solder fix basically fixes random (and sometimes permanent) stalling. From what you have said this does not seem to be the problem. You may have air pump relay problems caused by burnt contacts, but with no code given so that is just a guess.
You should have got the code(s) and posted them before going to the stealership.
re: How to Repair Relay Control Module (RCM) - (Mystery no Start)
Originally Posted by xscape
Alright I just picked the car up and it threw code P410 secondary air injection relay circuit signal error. Said I need to replace relay box.
https://www.crossfireforum.org/forum...tml#post536712
Does anyone know why the contacts burn? I thought that contacts burn when there is a poor ground, I may be wrong however. This is not in my field of expertise.
Last edited by onehundred80; 08-09-2011 at 01:47 PM.
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re: How to Repair Relay Control Module (RCM) - (Mystery no Start)
180, I always thought if the contacts are not getting enough voltage to completely "make" or "break", they would get a little arcing and sparking and eventually burn. A bad ground or bad solder joint could do that. But I am certainly not an expert in that.
Tom G.
Tom G.