NO BUS 5v Signal is present
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Joined: Aug 2021
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NO BUS 5v Signal is present
Hello, I have a dodge dakota 2002 4wd auto trans. The truck has had intermittent stalling issues since I received it. The truck one day lost all power and started to flash no bus. We have done all the diagnostics on the 5 sensors on 5v circuit as well as removing the instrument cluster, still cranks strong with no start. No fuel pump turning on, no relays clicking. Any ideas?
Registered User
Joined: Jun 2022
Posts: 1
Likes: 0
Hello, I have a dodge dakota 2002 4wd auto trans. The truck has had intermittent stalling issues since I received it. The truck one day lost all power and started to flash no bus. We have done all the diagnostics on the 5 sensors on 5v circuit as well as removing the instrument cluster, still cranks strong with no start. No fuel pump turning on, no relays clicking. Any ideas?
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Joined: May 2024
Posts: 1
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Crank no start no bus
Hello all,
A question for the minds...I have a 2002 Dakota Sport Quad Cab 4.7L 4x4. Two weeks my Dakota failed to start. I checked the fuses and relays and everything was working. Still nothing. So, I get on YouTube and find that there are several things I need to do. 5V reverence at all sensors, good continuity at the junction box, all fuses good but still no start and no bus on the dash. I replaced the TPS sensor a couple of years ago due to poor running and fluctuation in idling. I also just replaced the crank sensor for my peace of mind. Still, nothing was working. Then today I was looking at some of the wiring under the power distribution center by the battery and was checking for KOEO voltages. Still no bus on the odometer. I was standing at the passenger side of the engine compartment getting ready to do a wiggle test of the computer connections and all of a sudden, one of the relays on the Power Distribution Center buzzed for about two seconds, then clicked making a sound as though it was doing summersaults and then just stopped. I looked into the truck and the no-bus was gone and the truck started. I switched the relay with the one next to it and it still just started right up. I do not trust this enough to just button it all back together and call it good. I've been turning wrenches for 40 years but was never real good at electrical stuff like this. Most things I've seen so far are telling me to just get another PCM but I don't want to do that if that won't fix the problem. Any other ideas? Thanks in advance...
A question for the minds...I have a 2002 Dakota Sport Quad Cab 4.7L 4x4. Two weeks my Dakota failed to start. I checked the fuses and relays and everything was working. Still nothing. So, I get on YouTube and find that there are several things I need to do. 5V reverence at all sensors, good continuity at the junction box, all fuses good but still no start and no bus on the dash. I replaced the TPS sensor a couple of years ago due to poor running and fluctuation in idling. I also just replaced the crank sensor for my peace of mind. Still, nothing was working. Then today I was looking at some of the wiring under the power distribution center by the battery and was checking for KOEO voltages. Still no bus on the odometer. I was standing at the passenger side of the engine compartment getting ready to do a wiggle test of the computer connections and all of a sudden, one of the relays on the Power Distribution Center buzzed for about two seconds, then clicked making a sound as though it was doing summersaults and then just stopped. I looked into the truck and the no-bus was gone and the truck started. I switched the relay with the one next to it and it still just started right up. I do not trust this enough to just button it all back together and call it good. I've been turning wrenches for 40 years but was never real good at electrical stuff like this. Most things I've seen so far are telling me to just get another PCM but I don't want to do that if that won't fix the problem. Any other ideas? Thanks in advance...
