IPDM - ECU relay problems, symptoms and solutions - Nissan Titan Forum
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#1 Old 09-24-2010, 12:02 AM
baseballfanz
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IPDM - ECU relay problems, symptoms and solutions

As of late I have seen a lot of posts of truck not starting, sputtering or shutting off while driving. Most of these are usually because of the ECU relay failing or in some cases the whole IPDM board failing.
IPDM = Intelligence Power Distribution Module


Symptoms
- there have been lots of different symptoms but all in all the truck usually will not idle right or can't even be started.

-truck die while driving and can't be started
-sputtering like it's not getting gas
-rough idling
-usually no SES codes but might have a combination of other lights flashing or on.
-sometimes truck will die but will start up normally in a few minutes/hours than die again
-sometimes the truck crank but will not start than start normally after that (early sign of IPDM failure)
-battery usually good cause I had full lights in the truck and all other stuffs work
-I will add more to the symptoms list as I come across them

NascarJody was the first to post about swapping the ECU relay with the fog lights relay.
Note: this is a way to get you going and is not a permanent fix.
See image below


Location of IPDM box under the hood and how to remove
(you do not need to remove the IPDM out of the box but will need
to lift it up to access the lower row of relays)


Once you have swapped the relays and if the truck start right up, than you
know the ECU relay was the culprit.

FIX- couple of choices.
-Get a new ECU relay (as I say before swapping relay is not a permanent fix as the fog lights relay lacked a "protective diode", this protect the ECU from a power spike.
-Thanks to TitanBlue for finding the source of the correct relays but since it's only sold in lots of 50
-Thank you to RobKar for ordering and sending out the relays to those needed.
Relay model number: ACM33211
>>>Get ECU relays from RobKar<<<
Even those of you who have never had this problems, It would not be a bad idea to get an extra relay to keep in the truck.
Even with a new IPDM board I have some extra relays in the glove box.

-Get a new IPDM
-If you would rather get a new IPDM instead of just a relay, the part # for the new improved IPDM is 284B6-ZC00A
-I have read instance where swapping the relays did not help but the problems was solved once a new IPDM was installed.
-New IPDM cost about $100 or so, Swapping out the IPDM took me about 5 minutes in the driveway with a simple flathead screwdriver


Titan/Armada part numbers

Nissan's OBD II codes

Truetrac 305.5 WHP 370.4 ft/lbs tq.
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#2 Old 09-24-2010, 04:43 AM
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great write up. glad to see you keeping this topic alive and consolidating like 5 different threads into 1. lol.




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#3 Old 09-24-2010, 07:26 AM
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GREAT POST BBF!!!!! This one will be helping a lot of people!

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#4 Old 09-24-2010, 07:44 AM
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This is a great post... I'm pretty confident this is the problem I'm experiencing. So to get this straight if I get the correct ECU from RobKar this will be a permanant fix (unless I need to replace the entire IPDM) as opposed to what Nascarjody was proposing?
I clicked on the link to order from Robkar but there is still no additional information as to how to get the part?
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#5 Old 09-24-2010, 02:37 PM
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You have to send him a PM. He will get back to you with infos.
He's pretty quick to with shipping.
The relay swap is only meant as a quick fix to get you going.
I was stuck in the middle of nowhere at 3am when mine went out. Swapping relay got me home.

Titan/Armada part numbers

Nissan's OBD II codes

Truetrac 305.5 WHP 370.4 ft/lbs tq.
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#6 Old 10-08-2010, 09:15 AM
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Same Prob here

I had one replaced all ready and 5 months later its doing it again...... but this time i got video proof if it this time....lol back to nissna again. luckly they will warrenty this part even thought im past my warrenty...... I was getting kinda worried, due to they just put on a new fuel pump and sending unit.
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#7 Old 10-10-2010, 02:39 AM
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Angry

Hey guys! mine just started giving me problems yesterday! It has to be the IPDM. It started at night when driving home from Home Depot, my dash started blinking and my truck felt like it kicked down in gear three times! My dash lights turned off and the guages all went to zero as if the truck had been shut off, but the truck never died it just lost power. I stopped and pulled over and tried to drive again and the truck did not want to go, it felt as if the tranny was slipping and i had to rev it higher to get it to move. My dash lights came back on and so did my guages and then the engine power just kicked back in like normal but my check engine light came on! It scared the crap out of me! I finally made it home and i shut it off and waited a couple of minutes and turned it back on, my check engine light was still on but the truck seemed normal. I have a code scanner so i connected it and read the code as P0462, fuel level sensor circuit low input. I cleared the code and thought it was fine but it did it again today but the check engine light did not come on, i drove it home again like that and i just hope i did not make it worse by driving it like that. The thing is this is a 3 month old IPDM that i bought from my dealer here in Vegas, I only bought this new one because i was trying to prevent the problems that other members were having with their trucks and i never had this happen with my old IPDM. Will my dealer give a replacement? how long is the warranty? I will be installing my old one back in the truck tommorrow and if this fixes it then it means i just got a defective one from the dealer. I am looking at my invoice and it is the newer one #284B-ZC00a, i paid $103.00.
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#8 Old 10-10-2010, 12:21 PM
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With electrical components I would be very surprised if they give you a refund.
Your problems might not be the IPDM at all IMO (usually will not get a check engine light with IPDM failure).
Have you have your fuel sending unit recall done?
If the code is still on do NOT clear it, let the dealer see it.

P0462
The fuel level sensor is mounted in the fuel level sensor unit. The sensor detects a fuel level in the fuel tank and transmits a signal to the ECM or PCM.

It consists of two parts, one is mechanical float and the other side is variable resistor. Fuel level sensor output voltage changes depending on the movement of the fuel mechanical float.
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
When is the code detected?
An excessively low voltage is sent from the sensor is sent to ECM.
Possible Causes
- Fuel level sensor circuit harness or connectors is open or shorted
- Fuel level sensor may be faulty
Possible Solution
Replaced fuel level sensor.

If you still feel it's the IPDM, double check all the plugs and wires.
If one of those had came loose when you installed it problems could arise.

Titan/Armada part numbers

Nissan's OBD II codes

Truetrac 305.5 WHP 370.4 ft/lbs tq.
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#9 Old 10-10-2010, 03:44 PM
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Could this happen if you let your truck run out of gas? I thought at first it was because my fuel was low and i was driving with the low level light on before i could stop and get gas. Is the sending unit inside the tank? Has anyone replaced one? I have not seen the recall, does anyone have info regarding that? Any help would be appreciated.
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#10 Old 10-15-2010, 01:17 AM
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Hey BBF, Thanks for putting this up here too!

I am Robkar over on TT and if you send me a PM here (or there) I can get you the information for payment

Currently we know that this relay works for Armada, Frontiers, and of course the Titan. The cost is only $10 each with shipping, I still have over 100 relays and will order more when I get low.

Thanks!


My wife thinks I spend to much on my truck!!
UpRev Tuned
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