[jean004]

Hello:

Very little to no power to the vehicle. If I try and use a booster, I can use the remote and unlock/lock, I can put accessories on. Without it there is no power. I tried a swap with battery from Caravan and have same symptoms/will not start. Battery conditioner shows battery is fine (good voltage, capacity).

i took the car to town Sunday morning, parked it and next morning it had no power/would turn on.

I’ve been able to get it started momentarily but it stalls within a few seconds. Most of the time it won’t even start.

i ran ODB scanner and got the following codes

U0101 lost comm with TCM
U110A lost comm with SCM-CAN-C
U110F lost fuel volume message
U0131 lost comm with PSC
U0140 loss comm with BCM
U1411 implausible fuel volume signal
P0480 cooling fan 1 control circuit/open
P0123 TP sensor/APPS Circuit High Input

I’ve checked the wires which look ok from what I can see; connectors also ok. Fuses look ok and no sign of damage to most relays in fuse box.

Anyone can point me to a common problem the combination of codes would point to?

 

[Mark_]

Hello:

Very little to no power to the vehicle. If I try and use a booster, I can use the remote and unlock/lock, I can put accessories on. Without it there is no power. I tried a swap with battery from Caravan and have same symptoms/will not start. Battery conditioner shows battery is fine (good voltage, capacity).

i took the car to town Sunday morning, parked it and next morning it had no power/would turn on.

I’ve been able to get it started momentarily but it stalls within a few seconds. Most of the time it won’t even start.

i ran ODB scanner and got the following codes

U0101 lost comm with TCM
U110A lost comm with SCM-CAN-C
U110F lost fuel volume message
U0131 lost comm with PSC
U0140 loss comm with BCM
U1411 implausible fuel volume signal
P0480 cooling fan 1 control circuit/open
P0123 TP sensor/APPS Circuit High Input

I’ve checked the wires which look ok from what I can see; connectors also ok. Fuses look ok and no sign of damage to most relays in fuse box.

Anyone can point me to a common problem the combination of codes would point to?

Hi Jean, welcome to the forum

Honestly, this sounds like your battery is almost dead, especially if it's the original battery (they don,t last very long in these Cherokees...).

That said : you've tried with a Caravan battery with no luck. Maybe... the Caravan battery is not healthy enough, or powerful enough for the Cherokee. But this is just a guess, something to look into. Best to get the Cherokee battery load tested as a first t-shooting step. Less than healthy batteries in Cherokees cause all kinds of weird problems, including fault codes and malfunction lights/warnings.

 

[jean004]

Thanks Mark. The Jeep is very likely to need a new battery anyways. The caravan is a 2016 with much less mileage. I didn’t really think that battery could be an issue but it’s not far out either. I’ll try and load test the battery from Jeep on the van; and if that doesn’t work, get a replacement (it’s due soon regardless). I’m thinking it’s something else but sometimes these things are way more simple....

thanks for the reply

 

[jean004]

I replaced the battery today. It started momentarily and then stalled again after about 5-10 seconds. Neighbour suspects the fuel pump. Red security light is on and after initial start up, unable to get it to start again. This vehicle has sat quite a bit for the last few months and I can’t even remember the last time i put gas in it. So the fuel could be bad too.

 

[Flybynightcru]

I replaced the battery today. It started momentarily and then stalled again after about 5-10 seconds. Neighbour suspects the fuel pump. Red security light is on and after initial start up, unable to get it to start again. This vehicle has sat quite a bit for the last few months and I can’t even remember the last time i put gas in it. So the fuel could be bad too.

Well that's definitely not good. Sounds like it's time to plug into the big machine at the dealer....Is it still under warranty???

 

[jean004]

No unfortunately well past that time!

 

[AtlCade69]

With all the codes thrown AND a new battery, my 1st thought would be the Body Control Module or associated wiring or its fuses (the BCM can have 4 of them under the hood).

I would disconnect the battery, and while disconnected, I would pull each fuse, one at a time, and electrically check that it is good. Reseat it, go to the next one.
(obviously replace any that don't pass muster) I would also pull each relay inspect and reseat. (even test each one if possible)
Finally, if you are really up to it, I would unplug and reseat all of the connectors to the engine compartment fuse block.

After all of this, reconnect the battery and see what happens.

I was surprised at how many fuses in my '19 weren't fully seated, and sometimes just pulling them and reinserting them 180 degrees gives a good as new connection.

Sort of the modern version of pulling memory and cards from a computer and running over the connectors with a pencil eraser. Used to solve all sorts of gremlins. BTDT.

Not Jeep, but this summer my home A/C stopped working, I pulled and checked the outside circuit breaker, and it turned out that a large ant had been walking across the points when it kicked on.
Fried the ant, and stopped the relay from working. All I had to do was clean the points and was back in business!

 

[Mark_]

I replaced the battery today. It started momentarily and then stalled again after about 5-10 seconds. Neighbour suspects the fuel pump. Red security light is on and after initial start up, unable to get it to start again. This vehicle has sat quite a bit for the last few months and I can’t even remember the last time i put gas in it. So the fuel could be bad too.

Wow, Ok. So just to be sure here : does the engine crank when you try to start, or it's just dead..? This part is important because, with your added info about possible old/bad gas, I want to be sure we're not faced with two distinct problems here (no cranking vs cranking but not starting).

Because you're replacved the battery : are both connectors/terminals on tight, real tight ? They are flimsy and not easy to get on tight enough... so if you can twist them by hand on the battery post, they are too loose and could be causing issues.

 

[Desoto]

Also may have an issue with the security module, have you tried another Fob?

 

[jean004]

Also may have an issue with the security module, have you tried another Fob?

I tried both Fob. :-(

 

[jean004]

Wow, Ok. So just to be sure here : does the engine crank when you try to start, or it's just dead..? This part is important because, with your added info about possible old/bad gas, I want to be sure we're not faced with two distinct problems here (no cranking vs cranking but not starting).

Because you're replacved the battery : are both connectors/terminals on tight, real tight ? They are flimsy and not easy to get on tight enough... so if you can twist them by hand on the battery post, they are too loose and could be causing issues.

The last time I would of put fuel in it might be late November or sometime in December; I did take it for a big run in early November so the fuel system would of likely been “refreshed” throughout that run

 

[AtlCade69]

Fuel shouldn't go bad in that short of a time...

 

[Mark_]

The last time I would of put fuel in it might be late November or sometime in December; I did take it for a big run in early November so the fuel system would of likely been “refreshed” throughout that run

Ok. Now how about cranking (turning over) when you try to start it ? Anything, or just dead..?

Fuel shouldn't go bad in that short of a time...

Regular gas with some ethanol will degrade after... 4-5 months, maybe ? Shouldn't be an issue here.

 

[jean004]

I just rechecked connections, cleaned throttle body, reseated relays and fuses. Started up but shut down after a few seconds again

 

[jean004]

A bit of a pattern I think. If I disconnect the battery for a little while, on that first start up attempt the engine comes on for a few seconds and then shuts off. Any attempts after that do nothing. Accessories come on, dash is lit but engine won’t even try to start up. The red light on the dash is on with key accessories ON/Start.

 

[AtlCade69]

Hate to say, but it is sounding more and more like wiring harness damage or a module failure.

 

[jean004]

Good news. It was the anti theft on. I found an article online to get it out of that mode. It has started and working.

 

[jean004]

Thanks everyone for your replies and advice. Appreciate you replying and taking your time to try and help

 

[jean004]

Spoke to soon. I tried to take the Jeep for a drive, and was able to put it in reverse and drive. Reverse had no power, in drive it will go to 2000rpm and does not go above a certain speed. I took it around a small block and back in the driveway. It would not turn off when I took the key out. Anti theft still appears to be on.

 

[sanghill]

Refer to VEHICLE SECURITY ALARM in the Owner's Manual. Near page 19.