2nd Gen Ram Tech 1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

P1389 Code after new PCM

Thread Tools
 
Search this Thread
 
  #1  
Old 01-01-2019, 12:48 PM
Chunx89's Avatar
Chunx89
Chunx89 is offline
Professional
Thread Starter
Join Date: Feb 2017
Location: Port Saint lucie
Posts: 149
Received 0 Likes on 0 Posts
Default P1389 Code after new PCM

Accidentally burnt out my old pcm by coolant temperature sensor wires hitting 12v alt cable. The truck had a no bus on mileage and wouldn’t do anything. After purchasing a new pcm already programmed for my truck I put it in and now it cranks but won’t start. The mileage is showing back up but now I’m getting a p1389 code. I swapped wiper motor relay and cleaned the pcm ground cable up real good and still nothing. All fuses have been checked also!
The coolant temp sensor is completly shot and I’m waiting on a new connector so I just have the wires looped Incase that’s causing a no start also. The new battery is reading only 8 bolts on anometer
 

Last edited by Chunx89; 01-01-2019 at 01:10 PM.
  #2  
Old 01-01-2019, 02:04 PM
HeikIlm's Avatar
HeikIlm
HeikIlm is offline
Captain
Join Date: Sep 2012
Location: Europe
Posts: 710
Received 54 Likes on 50 Posts
Default

Have you checked the fuses from engine compartment fusebox?
Coolant sensor has nothing to do with starting.
 
  #3  
Old 01-01-2019, 03:46 PM
Chunx89's Avatar
Chunx89
Chunx89 is offline
Professional
Thread Starter
Join Date: Feb 2017
Location: Port Saint lucie
Posts: 149
Received 0 Likes on 0 Posts
Default

Originally Posted by HeikIlm
Have you checked the fuses from engine compartment fusebox?
Coolant sensor has nothing to do with starting.
Yeah I checked every fuse possible, when it did burn the pcm out it also popped the 20 amp fuse for the dash
 
  #4  
Old 01-01-2019, 09:23 PM
Chunx89's Avatar
Chunx89
Chunx89 is offline
Professional
Thread Starter
Join Date: Feb 2017
Location: Port Saint lucie
Posts: 149
Received 0 Likes on 0 Posts
Default

When I turn the key I can hear the fuel pump kicking on, it seems to be im not getting any spark. Is there a chance I have a bad crankshaft position sensor? Something else had to short out when I did that with the sensor
 
  #5  
Old 01-01-2019, 09:57 PM
MoparFanatic21's Avatar
MoparFanatic21
MoparFanatic21 is offline
Legend
Join Date: Nov 2014
Posts: 8,032
Received 306 Likes on 298 Posts
Default

Originally Posted by Chunx89
When I turn the key I can hear the fuel pump kicking on, it seems to be im not getting any spark. Is there a chance I have a bad crankshaft position sensor? Something else had to short out when I did that with the sensor
Very likely
 
  #6  
Old 01-02-2019, 04:42 PM
Chunx89's Avatar
Chunx89
Chunx89 is offline
Professional
Thread Starter
Join Date: Feb 2017
Location: Port Saint lucie
Posts: 149
Received 0 Likes on 0 Posts
Default

Wouldn’t it have a code for a crankshaft sensor? I’m stumped with this as wiring is something I’m not good at! If it ran fine until I accidentally shorted the pcm out and now I have a new pcm and it is letting me pull codes and not saying “no bus” anymore on mileage but now throwing a p1389 code and all fuses are good something else might of happened. I’m trying to read wiring diagram for grounds to pcm but I don’t really understand them
 
  #7  
Old 01-02-2019, 05:44 PM
MoparFanatic21's Avatar
MoparFanatic21
MoparFanatic21 is offline
Legend
Join Date: Nov 2014
Posts: 8,032
Received 306 Likes on 298 Posts
Default

Originally Posted by Chunx89
Wouldn’t it have a code for a crankshaft sensor? I’m stumped with this as wiring is something I’m not good at! If it ran fine until I accidentally shorted the pcm out and now I have a new pcm and it is letting me pull codes and not saying “no bus” anymore on mileage but now throwing a p1389 code and all fuses are good something else might of happened. I’m trying to read wiring diagram for grounds to pcm but I don’t really understand them
Wiring diagrams aren't hard and it can't throw a code because it didn't run and it is a new PCM.
 
  #8  
Old 01-02-2019, 05:50 PM
HeyYou's Avatar
HeyYou
HeyYou is offline
Administrator
Dodge Forum Administrator
Join Date: Apr 2010
Location: Clayton MI
Posts: 80,739
Likes: 0
Received 3,174 Likes on 2,927 Posts
Default

Basically, what its telling you is, the PCM isn't getting notice that the ASD relay is actually engaged. If you see power at the coil for a few seconds at key on, then the PCM is indeed controlling the relay, it just can't tell. May be a bad wire, may be a bad PCM. (wouldn't be the first time.)
 
  #9  
Old 01-03-2019, 04:30 PM
Chunx89's Avatar
Chunx89
Chunx89 is offline
Professional
Thread Starter
Join Date: Feb 2017
Location: Port Saint lucie
Posts: 149
Received 0 Likes on 0 Posts
Default

Pulled a plug and tested it, it’s giving off spark when trying to crank and I’m getting fuel. So that cancels out the crankshaft sensor. So I have a wiring issue most likely? All pins to pcm are clean and not burnt up
 
  #10  
Old 01-03-2019, 07:14 PM
MoparFanatic21's Avatar
MoparFanatic21
MoparFanatic21 is offline
Legend
Join Date: Nov 2014
Posts: 8,032
Received 306 Likes on 298 Posts
Default

Originally Posted by Chunx89
Pulled a plug and tested it, it’s giving off spark when trying to crank and I’m getting fuel. So that cancels out the crankshaft sensor. So I have a wiring issue most likely? All pins to pcm are clean and not burnt up
What does the sorry look like, what color?
 


Quick Reply: P1389 Code after new PCM



All times are GMT -4. The time now is 04:42 AM.