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Friday, November 10th, 2023 AT 8:35 PM
BILLY WEBSTER
- MEMBER
- 31 POSTS
No scanner communication with the dlc port.
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Cranks if I jump the relay but no spark after major engine work?
JACOBANDNICKOLAS
- MECHANIC
- 108,470 POSTS
Hi,
Pin 16 in the DLC should have battery voltage at all times. Check to see if that is the case. If there is no power, check fuse 16 in the junction block. When you check the fuse, confirm there is power to and from it.
Here is a link you may find helpful:
https://www.2carpros.com/articles/how-to-check-a-car-fuse
I attached a pic of the DLC to help locate pin 16. Pic 2 below shows the fuse in the junction block.
Let me know.
Take care,
Joe
See pics below.
Pin 16 in the DLC should have battery voltage at all times. Check to see if that is the case. If there is no power, check fuse 16 in the junction block. When you check the fuse, confirm there is power to and from it.
Here is a link you may find helpful:
https://www.2carpros.com/articles/how-to-check-a-car-fuse
I attached a pic of the DLC to help locate pin 16. Pic 2 below shows the fuse in the junction block.
Let me know.
Take care,
Joe
See pics below.
Images (Click to make bigger)
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Friday, November 10th, 2023 AT 10:29 PM
BILLY WEBSTER
- MEMBER
- 31 POSTS
The pin has power.
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Tuesday, November 14th, 2023 AT 9:56 AM
BILLY WEBSTER
- MEMBER
- 31 POSTS
I don't know if this helps. Not even sure if it was making that squealing noise before now.
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Tuesday, November 14th, 2023 AT 10:18 AM
JACOBANDNICKOLAS
- MECHANIC
- 108,470 POSTS
Hi,
I believe the red flashing light indicates the immobilizer is activated. Am I correct that is the light?
Joe
I believe the red flashing light indicates the immobilizer is activated. Am I correct that is the light?
Joe
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Tuesday, November 14th, 2023 AT 2:54 PM
BILLY WEBSTER
- MEMBER
- 31 POSTS
I'm pretty sure but I haven't found much documented on it. Every other jeep light I saw had symbols not just a red light.
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Tuesday, November 14th, 2023 AT 3:10 PM
BILLY WEBSTER
- MEMBER
- 31 POSTS
It's starting to add up I think because I had a similar issue after I started working in it. I changed the timing chains and when I put it back together if I remember right I was having a no-crank issue after replacing the crank and camshaft sensors and eventually the PCM at the same time I changed the head gaskets I was stoked because I hit the key and it turned over and started for a second a few times then stalled out. I figured it was old gas but the next day I went to crank it and got nothing.
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Tuesday, November 14th, 2023 AT 3:18 PM
JACOBANDNICKOLAS
- MECHANIC
- 108,470 POSTS
Hi,
I have a 09 Dakota and that light is the same as my anti-theft light. What did you do the last time this happened? Also, have you confirmed power to the PCM?
Let me know.
Joe
I have a 09 Dakota and that light is the same as my anti-theft light. What did you do the last time this happened? Also, have you confirmed power to the PCM?
Let me know.
Joe
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Tuesday, November 14th, 2023 AT 3:54 PM
BILLY WEBSTER
- MEMBER
- 31 POSTS
The last time it happened was when I replaced the PCM. How do you test the past to the PCM? I have tested the crank and camshaft sensors, and they seem to be working although not exactly statically they were acting pretty flaky, but I figured it was my battery needing to be charged at the time.
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Tuesday, November 14th, 2023 AT 5:17 PM
BILLY WEBSTER
- MEMBER
- 31 POSTS
If you couldn't tell when it comes to electrical I'm not the most up the date on it. There are so many wires in this truck. A couple of the bunches are as thick as a baseball bat with them. It's maddening at times.
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Tuesday, November 14th, 2023 AT 5:21 PM
JACOBANDNICKOLAS
- MECHANIC
- 108,470 POSTS
As far as the PCM, you need to run a can-scan, but that can't be done with the DLC issue. Did you check the pins identified as ground in the DLC pic above?
Let me know.
Joe
Let me know.
Joe
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Tuesday, November 14th, 2023 AT 8:35 PM
BILLY WEBSTER
- MEMBER
- 31 POSTS
Yeah, I had the pis on 16 and neg on 4 and 5 and it read 12 ish for each.
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Tuesday, November 14th, 2023 AT 8:57 PM
JACOBANDNICKOLAS
- MECHANIC
- 108,470 POSTS
Hi,
Double-check all connections at the PCM. If they are good, chances are the PCM is the issue. If we have power and ground where it's needed, that is my first suspect.
I wish I had a better answer.
Joe
Double-check all connections at the PCM. If they are good, chances are the PCM is the issue. If we have power and ground where it's needed, that is my first suspect.
I wish I had a better answer.
Joe
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Wednesday, November 15th, 2023 AT 7:12 PM
BILLY WEBSTER
- MEMBER
- 31 POSTS
Do you know if there's anywhere that rents out those DRB3 scanners?
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Wednesday, November 15th, 2023 AT 9:06 PM
JACOBANDNICKOLAS
- MECHANIC
- 108,470 POSTS
Hi,
Unfortunately, I don't. That is a Chrysler scan tool. I wish I had a better answer for you.
Joe
Unfortunately, I don't. That is a Chrysler scan tool. I wish I had a better answer for you.
Joe
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Thursday, November 16th, 2023 AT 7:57 PM
BILLY WEBSTER
- MEMBER
- 31 POSTS
How do I tell if its the key or the module that messed up?
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Saturday, December 9th, 2023 AT 5:27 AM
JACOBANDNICKOLAS
- MECHANIC
- 108,470 POSTS
Hi,
The easiest thing to do is check at the relay for power and a ground supply. If there is an ignition issue, you won't have power to the primary side. If it is the PCM, chances are you won't have a ground path at the relay.
Let me know.
Joe
The easiest thing to do is check at the relay for power and a ground supply. If there is an ignition issue, you won't have power to the primary side. If it is the PCM, chances are you won't have a ground path at the relay.
Let me know.
Joe
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Saturday, December 9th, 2023 AT 10:32 PM
BILLY WEBSTER
- MEMBER
- 31 POSTS
Update- the obd2 port is not communicating with the PCM I tried to have my key reprogrammed and he couldn't do it because of this.
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Saturday, December 9th, 2023 AT 11:23 PM
JACOBANDNICKOLAS
- MECHANIC
- 108,470 POSTS
Hi,
Check to see if there is battery voltage to pin 16 at the data link connector. If there isn't, check to see if fuse 16 in the under-hood fuse box is good. See pic below.
Let me know what you find.
Joe
See pic below.
Check to see if there is battery voltage to pin 16 at the data link connector. If there isn't, check to see if fuse 16 in the under-hood fuse box is good. See pic below.
Let me know what you find.
Joe
See pic below.
Image (Click to make bigger)
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Sunday, December 10th, 2023 AT 7:18 PM
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