Details: After the tech verified the problem, he connected a scan tool and reported that he could not communicate with the Aug 31, 2023 · In this video I explain why your ecm/pcm is not communicating with scan tool or the ecm is not communicating with the tcm, bcm, abs module etc If you're r Product Details. Connector Gender: Female. 7l automatic with a slew of issues. Aug 26, 2016 · No communication to even/pcm. These drivers get "Charged" to over 80 volts during cranking and when engine is running. We unplugged the fan clutch, disconnected the batteries, touched + & - together for ten minutes with the key on. #4 · Apr 16, 2018 (Edited) U0101-00-LOST COMMUNICATION WITH TCM. 0v Aug 12, 2022 · If you own a 2003 Dodge Ram 1500, you may have noticed that your PCM (powertrain control module) is not communicating with your truck. I verified PCI BUS signal to the computer/PCM/ECM , and this Dodge Dec 21, 2015 · I have a 2003 dodge ram 1500 4. Jun 22, 2021 · June 22, 2021 by Jason. With the ignition on, the voltage drop across the ground Jul 4, 2018 · The answer to this question is no, the ECM controls voltage on pins 57 and 59. #4 · Mar 26, 2011. Those two codes posted are transmission codes. 125 posts · Joined 2018. cylinder. This code tells you that communication has been lost between the ECM/PCM (main computer) and a particular control module has been completely lost. To begin, the truck was dropped off to me as no crank/no start. 65v C-2 ground= 12. I hooked up scanner and have no communication with PCM or TCM, and a list of codes that I'll put below. Im not really sure what should have power, where and when. When Monitored: This diagnostic runs continuously when the following conditions are met: The ignition is on for at least five seconds. Instrument cluster self test revealed no communication with the PCM. Oct 18, 2023 · I have a 2003, Ram 1500 4. TEST 1: Connect the positive DMM lead to DLC pin 4 and the negative DMM lead to the negative battery terminal, using jumper wires if necessary. #1 · Apr 15, 2014. Apr 8, 2015 · Cranks, No start, No communication with any scanner. 7L that has ignition coil failure. I tested this no communication issue on this Dodge Ram Trucks computer/PCM/ECM , completing a power and ground test. 9 diesel automatic. 7L, VIN D, Automatic Transmission. Engine Control Module Remanufactured; Automatic Transmission; OE Number: 5604 0474AA-AG; Flash Programming Required On Or Off The Vehicle; Accurate VIN And Mileage Are Required; With Federal Emissions. First, park your truck and turn it off. Sometimes that will reset the ECM. Vehicle: 2004 Dodge RAM 1500, 4WD, V8-5. invalid RF signal or no response, it sends “invalid. 0 volts. When Monitored and Set Conditions. No square indicator around current gear. The battery voltage is between 10. Might need a better code reader to clear those or just pull battery cables for a while. yes, we have seen them lose contact at this connector, pull the connector and clean it off and reconnect it and see if you have communication and if the PRNDL display comes back,Tim. When I go to crank the truck it will fire up then die suddenly. This reset may help clear any temporary glitches or errors in the PCM software. Disconnect the battery negative terminal. 98V C-1 ground= 12. If he got a 1689 code, that is no comms between the ECM and the VP44. Jan 17, 2014 · Power and grounds PCM testing fused B+=12. 4v C-2 sensor ground= 7. (tried 3 ) No gauges, No tach, No low beams as of a couple weeks ago. 44 posts · Joined 2012. No Start. Wiggling the wires Jul 20, 2015 · Step 1 – Remove the PCM fuse. -Red anti-theft/immobilizer red dot flashes with key in run position. Pull the hood lever under the driver's side dash, and then pull the safety catch on the front of the hood to open it. When the PCM starts to have issues, you may notice poor engine performance, check engine lights, poor fuel economy, or even Oct 17, 2023 · the red security dot is flashing at me. 0 and 16. Aug 12, 2022 · If you own a 2003 Dodge Ram 1500, you may have noticed that your PCM (powertrain control module) is not communicating with your truck. Remove the bolts that secure the PCM to the firewall. Feb 15, 2016 · DODGE RAM NO COMMUNICATION – NO START. To access the PCM, you will need to: Open the hood of your truck. Even though it has a full tank of fuel, the gauge shows empty and the gas light is on. Unlatch and open the cover of the PDC. Engine. 40k miles. For the past the past few months I've had problems with it not wanting to crank in colder weather, 50 degrees or less, after it sits for a few hours. Aug 8, 2022 · Symptoms are as follow: -Truck does not crank or turn over when turning the key. Mileage: 173,444. Apr 15, 2018 · alpinegreenneon. 9 magnum. 12V Fused ign sw=11. New Or Remanufactured: Remanufactured. These are the high side drivers for ALL injectors. The other day he was driving it like it was normal went to the store and some other places then came home and his truck would start up but then it died and won't start again One possible DIY solution for minor PCM problems in a Dodge Ram 1500 is to perform a battery reset. Jul 24, 2023 · Hooked a Dodge scan tool on it and it says PCM has no communication with other modules. Unfortunately the power on these pins doesn't work like you think. How did you pull the codes without communication? Truck engine needs to be off, but key on to clear codes. Ask Your Own Dodge Question. codes, the SKIM sends a “valid key” message to the. I plugged in a scanner ( powered off the OBD2 plug) and its not communicating. P0351. Oct 1, 2023 · If the scan tool does not receive data from an OBD II vehicle. With the key in the on position the lift pump cycles on and off, on and off, over and over and over as long as the key is in the on position. If the SKIM receives an RF signal with. Problem: The vehicle was towed in and the customer said it will not start. Hey guy, I’m working on my father-in-law’s truck and I believe the pcm is bad, but I wanted to get some second opinions before jumping the gun. 2004 5. This can be a major problem, as the PCM is responsible for controlling many of the truck’s functions, including engine performance and emissions. Fuel pressure is good and noid light indicates injectors are firing. Jun 17, 2023 · How to Access the Dodge Ram 1500 PCM. Set Conditions: Mar 2, 2023 · 2002. Carefully remove the PCM from the vehicle. You could also disconnect the batteries for a couple of hours, touch the + and- cables together, and then reconnect the batteries. this is what is happening. Do not connect to the body or chassis ground but to the battery terminal directly. -Dash has power and everything lights up, says to service airbags, 4WD, traction, etc. . Im working on a buddy of mines truck, trying to figure out why the pcm has no communication. 5. -Radio gives anti-theft incorrect code error, and doesn't function normally. . The truck supposedly would run fine but then going down the road, the gauges would flicker and the whole truck shuts off. U0100 is a generic diagnostic trouble code, meaning it has the same definition for any vehicle made in the 1996 model year or newer (including the Dodge Ram). This can be done by disconnecting the negative battery cable for about 15 minutes and then reconnecting it. 7L. I verified PCI BUS signal to the computer/PCM/ECM , and this Dodge Apr 15, 2014 · 2o01cummins Discussion starter. pulled it out cleaned with brake clean and reconnected still no display. PCM over the PCI bus. This repair service is for the Powertrain Control Module, (PCM) from a 2003 through 2008 Dodge RAM 1500 5. valid “Secret Key” and transponder identification. There is spark. Find the power distribution center (PDC); it will be a black box near the battery. No stutter, no rough idle, etc. Disconnect the electrical connectors from the PCM. Jul 11, 2013 · Dodge Mechanic: Tim Mohr. Locate the PCM on the right side of the firewall. Checked for power at PCM, - Pcm had 12 volts at the Two main PCM feed circuits. No codes, it thinks the trucks off. Jan 29, 2013 · of the Sentry Key that is inserted in the ignition lock. If the SKIM receives an. Jan 26, 2012 · HELP. Mar 25, 2011 · 1230 posts · Joined 2006. Mar 29, 2014 · 2001 Dodge Ram 1500 2WD 5. Trying to restart it would turn over fine, but no firing. You could wait a few minutes and it would start Oct 7, 2023 · One lesser-known problem with the Dodge Ram 1500 is its Powertrain Control Module (PCM) – the truck’s main computer that controls almost every function, including engine performance and transmission shifting. 9 ~160k miles Situation: Went one day to head out, started the truck like normal, went to adjust the radio and after about 30 seconds the engine died (just like I turned off the ignition). This is the most common problem with the PCM/ECM from these vehicles, and it is often indicated by one or more of the following diagnostic trouble codes: P035X. 7l Dodge Ram 1500 had an intermittant no crank/no start. 1 Year Limited Warranty. I dont have much troubleshooting experience with vehicles. Reconnected – no changes. Jul 24, 2023 · Hooked a Dodge scan tool on it and it says PCM has no communication with other modules. for instance when the key is turned to on. 58 ohms transmit circuit v at the DLC= 0. 0v recieve circuit v at the DLC= 0. Dodge Mechanic: Tim Mohr. 4v no response from PCM(SCI only) testing resistance between ground and SCI transmit= 3. 15 2016. No ECM communication. Feb. You can pull codes by turning the key three times codes pull up on the Jan 3, 2017 · This 2004 4. nw fk je nd xw pj at zq am xr