Dealer twice in 1 day, going back again

[ppfd]

Just wondering how does the light bar get power? If you take power from the lights will restore the network? Just spit balling since I'm halfway across the country ? but worth a try.

Plugs into the driver side marker light.
I thought about unplugging it and see what happens. Need to get it running again and try it.
Crazy if it is a simple LED light. Whats that say for other mods?
Thought about the wolf haus bed power plug. Now I'm not so sure

Sponsored

 

[9zero1790]

Just wondering how does the light bar get power? If you take power from the lights will restore the network? Just spit balling since I'm halfway across the country ? but worth a try.

beat me too it!

 

[ppfd]

This one right here:

https://customautoworksstore.com/pr...nger-lariat-raptor-style-light-kit-plug-play/

 

[9zero1790]

those are so popular i doubt its the issue but its a fair starting point. could be faulty light bar making the truck flip its lid as its getting juice from the trucks light system on the bcm pcm dcm whatever the heck power computer flippy thinggy. you know--- the thing...

 

[airline tech]

I cannot believe that the Dealer either did not address this code or dug deeper when the ABS Module was a (No-Help) attempted fix.
For me the small needle in the haystack got uncovered a bit and I can begin to see it thanks to the list of fault codes.

I believe all of the other codes are followers of the - C0051

To clarify, the Top Code:
ABS - HS2 - C0051 - 62-48 - The ABS module is the reporting module that is seeing the fault, it does not indicate that the ABS Module is Faulted, then since the ABS Module has lost the signal from the PSCM, its shutting down and Dominio effecting the other modules on the network.
Troubleshoot this code and repair and it will most likely fix all the others.
But this is a good starting point - to address the issues.

There are a few Pin-Point Tests that need done, the attached is just one of them, and they dive deeper into the code.

Possible Parts Needed:
PSCM - Power Steering Cont. Mod
EPAS - Steering Gear - (rack) - Position Sensor
Steering Colum
ABS Module (Already Replaced)


Note: On Page 2 of the PDF, there is a long list of related fault codes (Related-Followers) , there are Zero (Voltage) codes listed, they all appear to be communication and Invalid Data due to the loss of the Communication Bus with the exception of the Brake Booster and Brake Switch, but those also correlate to the communication side (so I'm not worried about those) until a Pin-Point test of the main code is complete

 

[ppfd]

I thought it was weird they handed me a list of codes. I thought "there's the list of problems to fix."

PCM, ECM, ABS, were all mentioned back when this started.
The service advisor said "we just can't go replacing parts."
LoL, its warranty work and I'd be replacing them if it were me working on it.

I miss the old days of plug wires, distributor caps and carburetors.

I'll print that off and take it to them, see what they say.

 

[Rp930]

In my experience the problem is usually in the first or second trouble code listed. They should be able to see the time each occurred. The first one is usually the culprit unless it’s a general power supply issue.

 

[navsnipe]

Disconnect all add-ons that have electrical connections and retest. I'm suprised (but not really) that the technicians didn't do this in their diagnostics or at least suggest it.

I had a very similar experience on a 2017 BMW R1200RT motorcycle with CAN bus problems after aftermarket fog lights installed. An isolation relay was needed but not used. Once the circuit was returned to stock the mysterious CAN bus problems went away.

 

[Jason B]

When you go back, bring a baseball bat, in case they say 'no problems found'.

 

[ppfd]

So for 2 days it would not start with the key or remote (key fob)
This morning it started with the key fob, key turn to run and then shift the transmission and it died numerous times.
Would not start with the key, just the key fob.
Had it hauled out

 

[Jason B]

Maybe try one more time, that's the ticket.

 

[ppfd]

Me and the tow operator were cranking the hell out of it. Maybe I'll get a new battery this time

Now to see if I can get a loaner car. Enough's enough

 

[airline tech]

I have a strong hunch, the suspect area to look at is the G-108, this is the Ground for the PSCM Module, if the PSCM Module has lost its Ground, then it's not powered, and the HSCAN2 Bus also will lose power as a result, triggering the fault long list of faults.
Please have them check this Ground Point, this is HIGHLY likely the problem. For Ground Issue

Outside The Box - Troubleshooting Here
If you only focus on the Starting Issue

On the Power Feed Side, there are (2) suspect relays and with the starting issues you are having, included with all of this I HIGHLY suspect one of these relays are not being powered.

1. PCM Power Relay - Powers PCM and also Powers the Run Start Relay.
2. Run/Start Relay - Tells the Modules the engine is Running, Including the PSCM and ABS and PCM

Side Note:
As this is one area, that has quite a few posts about it.
And that is (No-Start) issues and then all of a sudden (Starts) without anything other than waiting for a small amount of time (10 Minutes or So)

Relays can sometimes stick, when power is removed, after some time they relax to normal at rest position thus (reset themselves)
Tie in the Modules staying powered for a brief time until they enter (Sleep Mode) thus keeping power on the relays would explain this little quirk with starting issues, as once the module powers down (Sleep) its then dropping power off of the relays.

So, for those that have had the issue of (No-Start) and then magically starts, and it is a reoccurring issue, check both of these relays.

 

[9zero1790]

I have a strong hunch, the suspect area to look at is the G-108, this is the Ground for the PSCM Module, if the PSCM Module has lost its Ground, then it's not powered, and the HSCAN2 Bus also will lose power as a result, triggering the fault long list of faults.
Please have them check this Ground Point, this is HIGHLY likely the problem. For Ground Issue

Outside The Box - Troubleshooting Here
If you only focus on the Starting Issue

On the Power Feed Side, there are (2) suspect relays and with the starting issues you are having, included with all of this I HIGHLY suspect one of these relays are not being powered.

1. PCM Power Relay - Powers PCM and also Powers the Run Start Relay.
2. Run/Start Relay - Tells the Modules the engine is Running, Including the PSCM and ABS and PCM

Side Note:
As this is one area, that has quite a few posts about it.
And that is (No-Start) issues and then all of a sudden (Starts) without anything other than waiting for a small amount of time (10 Minutes or So)

Relays can sometimes stick, when power is removed, after some time they relax to normal at rest position thus (reset themselves)
Tie in the Modules staying powered for a brief time until they enter (Sleep Mode) thus keeping power on the relays would explain this little quirk with starting issues, as once the module powers down (Sleep) its then dropping power off of the relays.

So, for those that have had the issue of (No-Start) and then magically starts, and it is a reoccurring issue, check both of these relays.

this is one reason why r5g is so awesome. great info !

 

[Max Crafter]

so it cranks?
all this time i thought you got nothing at all

Sponsored