ECM

dm567 · Jan 4th, 2005, 12:08 PM

I read the above posts concerning the retreival of the codes on the ecm.

It also states that on pathfinders up to 99 the ecm in under the front passenger seat. I can't find it there? Where is it?

It also states that in 1996 they switched to OBDII so you can use a scan tool. I have a 1997 pathfinder. Do I need to use a scan tool or can I use the dial on the ecm, where ever it is?????????j

dom

lewisnc100 · Jan 4th, 2005, 01:25 PM

On your 97 Pathfinder you can use the diagnostic mode selector screw on your ECM, but it's up under the dash and difficult to reach. Search on diagnostic mode selector to find past discussions.

dm567 · Jan 4th, 2005, 01:59 PM

lewis,

Thanks for the help. I looked under the dash, after looking under the seat, and can't see it. What does it look like? Do I have to remove any part of the dash to get to it?

Thanks,
dom

**88pathoffroad** · Jan 4th, 2005, 02:16 PM

I don't think 96-up Pathfinders have an ECM code retrieval setup like the earlier ones do. They're OBD III, not II. You have to have it scanned with a scanner to find the codes.

lewisnc100 · Jan 4th, 2005, 03:43 PM

Quote:

Originally Posted by 88pathoffroad

I don't think 96-up Pathfinders have an ECM code retrieval setup like the earlier ones do. They're OBD III, not II. You have to have it scanned with a scanner to find the codes.

96 - 2000 models have the diagnostic mode selector screw, they do not require a code reader.

The 96+ Pathfinders are OBDII. Unless I've missed some recent news, OBDIII has not been installed in any vehicles and might never be used because of the transmission features and privacy issues.

**88pathoffroad** · Jan 4th, 2005, 07:21 PM

Oh, OK. My bad.

dm567 · Jan 4th, 2005, 09:36 PM

Now that I definately know its there, how can I find the ECM under the dash?

Where is it and how do I find it?

Thanks,
Dominic

dm567 · Jan 4th, 2005, 09:54 PM

I've done the search and no more specifics.

It must be right in front of my nose but I can't see it under the drivers side dash. (please don't tell me its the passenger side)

DM

lewisnc100 · Jan 5th, 2005, 07:52 AM

http://www.nissanforums.com/showthread.php?t=57119

dm567 · Jan 5th, 2005, 11:02 AM

Thanks,

NOw I found it. For future newbees, in my opinion its impossible on a 97 pathfinder to get to the screw unless you drop the ecu. Its easy but you have to take out the front portion of the dash under the steering column and then remove two bolts holding the bottom of the ecu with a long extension and a 10mm socket. Then it easily slides down and you can see the screw and remove the plactic over it. My screw was a phillips head. There is no led on the ecu.

I counted the long and short flashes of the "check engine" light and found two codes:

3 long 4 short
and
9 long and 8 short

Then I looked it up on the sticky posted at the top of this forum and fount that
34 is knock sensor
and
98 is engine coolant temperature sensor

Am I doing this right. Do I have to convert the codes???????

If I did this right,
now what? do I change both or one or should I clear them and see if they come up again?

Also, How do I clear? The directions of the posted sticky don't work on this model since there is no led.

Dominic

lewisnc100 · Jan 5th, 2005, 12:26 PM

Difficult to access without removing, but definitely not impossible and quite easy after the first time. Others that have dropped it like you have leave the bolts finger tight to allow easy access later. To clear the codes do exactly like you did, turn the screw fully and wait, turn back fully and turn off the ignition. That will clear them.

MIL 0304 = P0325 Knock Sensor - This error will not trigger the check engine light and I get it on mine everytime I connect an OBDII reader. Work on the other code.

MIL 0908 = P0125 Coolant Temp Sensor - Most likely the harness or connector or a bad temp sensor. Worst case it could point to a bad thermostat.

dm567 · Jan 5th, 2005, 10:18 PM

Difficult to access without removing, but definitely not impossible and quite easy after the first time. Others that have dropped it like you have leave the bolts finger tight to allow easy access later. To clear the codes do exactly like you did, turn the screw fully and wait, turn back fully and turn off the ignition. That will clear them.

MIL 0304 = P0325 Knock Sensor - This error will not trigger the check engine light and I get it on mine everytime I connect an OBDII reader. Work on the other code.

MIL 0908 = P0125 Coolant Temp Sensor - Most likely the harness or connector or a bad temp sensor. Worst case it could point to a bad thermostat.

What are "air lift air bags?" I noticed it under you handle.

I did exaclty that routine and it didn't erase the codes. Perhaps I'm missing something but don't you:" turn the screw fully and wait, turn back fully and turn off the ignition" every time you check the codes. Do you do it with the engine running perhaps? That would be different. Otherwise isn't that exactly the same routine you do to check the codes.

Also, Where can I find the temp sensor? by the way I cleared the codes by unplugging the battery(lost my station presets) and the light did not come back on. I've driven about 100 miles since and still not on.

dom

lewisnc100 · Jan 6th, 2005, 06:20 AM

This link explains the air bags better than I can, I got them for towing a boat with heavy tongue weight.

http://www.airliftcompany.com/al1000.htm

To read the codes you turn the screw fully, wait, then turn it back fully. Immediatly after that to clear them, you turn the screw fully again, wait, then turn it back and turn the ignition off. So you are doing it twice in a row to clear the codes, first one reads the codes, second clears them.

To find the coolant temp sensor just follow your upper rad hose backwards towards the engine, it will be about 2 or 3 inches back from where the upper rad hose connects on the right side.