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 Post subject: Re: 05 crd limp mode problem! please help!
PostPosted: Thu Sep 14, 2017 2:36 pm 
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Started jeep with ac on, fan came on about 15 seconds later!
Not sure of speed, but it sounds like high to me.
Did this twice, did same thing both times!

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2005 Jeep LibertyCRD Limited :JEEPIN:
Blk Brush Guard/Hella's
Ironman Springs/Bilstein's
Yeti Stage4 MaxTune
Weeks ElbowKit & Battery Tray
NO FCV/EGR
Samcos/ProVent
SunCoast&Transgo
Carter Intank-pump
2mic. Sec.Fuel Filter
Flowmaster/NOcat,
V6 Airbox
GM11 blade fan / Hayden HD clutch
98 Dodge Cummins, 5"exh. Viair, Huge K&N


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 Post subject: Re: 05 crd limp mode problem! please help!
PostPosted: Thu Sep 14, 2017 8:18 pm 
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Location: Kirby WV
I started the jeep and turned on ac. No fan, Pulled relay as suggested and fan came on at low speed.....

Put it all back together.

Not sure if it is good or bad. Ran to get fuel and it runs great. Did not try the ac as my wife took it.

I would really like to know definitively what it should be doing.

Though for now I'm quite happy with it. Now the outside temps have been in the low 70s so the engine is cool.

Randy


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 Post subject: Re: 05 crd limp mode problem! please help!
PostPosted: Sat Sep 16, 2017 11:17 am 
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The ASD when energized supplies control voltage to both of the LOW and HIGH speed relays according to the FSM.
Both relays are controlled by the PCM which to the best I can figure out without a logic diagram of the PCM, looks at the following inputs to determine which relay to energize.

    1. AC clutch coil status
    2. AC high side pressure switch status
    3. Engine coolant temperature
    4. Transmission temperature

All of the above can and will activate the electric cooling fan depending on input from these items.

Now if anyone has a logic diagram of the PCM, please share, I would love to see it!!! :wink:

_________________
2005 Jeep LibertyCRD Limited :JEEPIN:
Blk Brush Guard/Hella's
Ironman Springs/Bilstein's
Yeti Stage4 MaxTune
Weeks ElbowKit & Battery Tray
NO FCV/EGR
Samcos/ProVent
SunCoast&Transgo
Carter Intank-pump
2mic. Sec.Fuel Filter
Flowmaster/NOcat,
V6 Airbox
GM11 blade fan / Hayden HD clutch
98 Dodge Cummins, 5"exh. Viair, Huge K&N


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 Post subject: Re: 05 crd limp mode problem! please help!
PostPosted: Sat Sep 16, 2017 1:13 pm 
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Joined: Sat Aug 27, 2016 9:12 pm
Posts: 1120
Location: N. Muddle Oregon Coast
Logic?
From DCJ?
Good Luck!

_________________
'06 Lbrty Sprt CRD 147Kmi

Sasquatch
DSS Turbo
CAT-elimntr
Weeks Stg1&2 EGRfix
PV-200
BLING
vent gauge mount

IDParts New
head
cams
rockers
Timing set
ARP studs
eTn1 GX2123 5v GPs

Flowmaster 942550
Carter P76611M
GM 12611872
Hayden 2986
GM 15017911
2010 Trans
Sonnax 44957
Transgo kit
AHS 45T TC
Cooper 51770

Future plans: GDE Trans&Hot-tune


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 Post subject: Re: 05 crd limp mode problem! please help!
PostPosted: Sat Sep 16, 2017 9:41 pm 
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Location: Central GA
GordnadoCRD wrote:
Logic?
From DCJ?
Good Luck!

Yea I know, but one can wish! :roll:
One (logic block control diagram) would answer so many riddles we all have trouble trying to figure out exactly how the engineers at DCJ programed certain things to function and under what circumstances or conditions...
Logic block diagrams were so very common and basic in the control world from which I was familiar with! I have drew many of them myself!

:SOMBRERO:

_________________
2005 Jeep LibertyCRD Limited :JEEPIN:
Blk Brush Guard/Hella's
Ironman Springs/Bilstein's
Yeti Stage4 MaxTune
Weeks ElbowKit & Battery Tray
NO FCV/EGR
Samcos/ProVent
SunCoast&Transgo
Carter Intank-pump
2mic. Sec.Fuel Filter
Flowmaster/NOcat,
V6 Airbox
GM11 blade fan / Hayden HD clutch
98 Dodge Cummins, 5"exh. Viair, Huge K&N


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 Post subject: Re: 05 crd limp mode problem! please help!
PostPosted: Sun Sep 17, 2017 1:42 am 
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Posts: 1120
Location: N. Muddle Oregon Coast
Yeah. There are days I'm sorely tempted to wax nostalgic about the bygone era of flowchart troubleshooting.

If / thens for Yes or No. Sometimes an 'else' thrown in...

The FSM kinda does that, but there's usually no indication of how the value is established or what it means, which is why most Dealer mechanics just hook up the scan tool, and start replacing the parts the book tells them to until they get to one that solves the problem. (maybe..hopefully)

_________________
'06 Lbrty Sprt CRD 147Kmi

Sasquatch
DSS Turbo
CAT-elimntr
Weeks Stg1&2 EGRfix
PV-200
BLING
vent gauge mount

IDParts New
head
cams
rockers
Timing set
ARP studs
eTn1 GX2123 5v GPs

Flowmaster 942550
Carter P76611M
GM 12611872
Hayden 2986
GM 15017911
2010 Trans
Sonnax 44957
Transgo kit
AHS 45T TC
Cooper 51770

Future plans: GDE Trans&Hot-tune


Top
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 Post subject: Re: 05 crd limp mode problem! please help!
PostPosted: Sun Sep 17, 2017 8:10 am 
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Posts: 2962
Location: Central GA
GordnadoCRD wrote:
Yeah. There are days I'm sorely tempted to wax nostalgic about the bygone era of flowchart troubleshooting.
If / thens for Yes or No. Sometimes an 'else' thrown in...
The FSM kinda does that, but there's usually no indication of how the value is established or what it means, which is why most Dealer mechanics just hook up the scan tool, and start replacing the parts the book tells them to until they get to one that solves the problem. (maybe..hopefully)

Ah, but if we knew what was supposed to happen and when (setpoints) and under what circumstances, troubleshooting would be so easy!
The FSM does divulge some minor logic on some things, but there are many control parameters performed by the on board computers that are simply not revealed! :banghead:
Case in point is the electric cooling fan control logic on the diesel model! We know some things energize it in either low or high speed, but exactly what, when, and at what setpoint are obscure. :roll:

_________________
2005 Jeep LibertyCRD Limited :JEEPIN:
Blk Brush Guard/Hella's
Ironman Springs/Bilstein's
Yeti Stage4 MaxTune
Weeks ElbowKit & Battery Tray
NO FCV/EGR
Samcos/ProVent
SunCoast&Transgo
Carter Intank-pump
2mic. Sec.Fuel Filter
Flowmaster/NOcat,
V6 Airbox
GM11 blade fan / Hayden HD clutch
98 Dodge Cummins, 5"exh. Viair, Huge K&N


Top
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 Post subject: Re: 05 crd limp mode problem! please help!
PostPosted: Mon Sep 18, 2017 6:20 pm 
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Joined: Wed Jul 26, 2017 8:16 am
Posts: 36
Location: Kirby WV
Well good news. When warmed up and the ac on the electric fan runs.............. I feel like celebrating. I changed the fuel filter this past weekend so I think everything is as it should be. All the Noob suggestions are complete. The check engine light is on since the MAF sensor is unplugged. It runs really well. My wife is even impressed with it.

Thanks for everyones help. I am very dismayed at the dealers inability to fix this. Especially when they billed the previous owner, a girl, thousands and fixed nothing.

I am certain I will have more questions in the future..... :wink:

Randy


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 Post subject: Re: 05 crd limp mode problem! please help!
PostPosted: Mon Sep 18, 2017 6:57 pm 
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Posts: 2957
Location: Oxford, Connecticut
Good job ...now you're a bonafide CRD fuel filter changer and if you stick with it long enough you'll inadvertently become a certified diesel mechanic.

And probably become divorced as well.

_________________
2006 Liberty Limited CRD, Deep Beryl Green, Yeti tune, Arp studs, new cams, rockers, lifters, TB. "Green Monster"
2005 Liberty Sport CRD, Deep Beryl Green, GDE Hot Tune, ARP studs. "Rocket"
1982 Fiat 124 Spider Convertible. "Fiona"


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 Post subject: Re: 05 crd limp mode problem! please help!
PostPosted: Mon Sep 18, 2017 9:11 pm 
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Joined: Sat Aug 24, 2013 11:36 pm
Posts: 2962
Location: Central GA
You will learn, LOST is your best friend and advisor on matters of importance concerning the Jeep CRD!
Most dealers do not have a frickin clue about these vehicles unfortunately! :roll:
There are some really good and knowledgeable experts on LOST when you may be in need of advice!
Most have been there done that at one time or another! :wink:

_________________
2005 Jeep LibertyCRD Limited :JEEPIN:
Blk Brush Guard/Hella's
Ironman Springs/Bilstein's
Yeti Stage4 MaxTune
Weeks ElbowKit & Battery Tray
NO FCV/EGR
Samcos/ProVent
SunCoast&Transgo
Carter Intank-pump
2mic. Sec.Fuel Filter
Flowmaster/NOcat,
V6 Airbox
GM11 blade fan / Hayden HD clutch
98 Dodge Cummins, 5"exh. Viair, Huge K&N


Top
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 Post subject: Re: 05 crd limp mode problem! please help!
PostPosted: Tue Sep 19, 2017 7:42 am 
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Joined: Sat Aug 27, 2016 9:12 pm
Posts: 1120
Location: N. Muddle Oregon Coast
Don't be too dismayed about the Dealership ignorance situation. You will become accustomed to it soon enough.

_________________
'06 Lbrty Sprt CRD 147Kmi

Sasquatch
DSS Turbo
CAT-elimntr
Weeks Stg1&2 EGRfix
PV-200
BLING
vent gauge mount

IDParts New
head
cams
rockers
Timing set
ARP studs
eTn1 GX2123 5v GPs

Flowmaster 942550
Carter P76611M
GM 12611872
Hayden 2986
GM 15017911
2010 Trans
Sonnax 44957
Transgo kit
AHS 45T TC
Cooper 51770

Future plans: GDE Trans&Hot-tune


Top
 Profile  
 
 Post subject: Re: 05 crd limp mode problem! please help!
PostPosted: Tue Sep 19, 2017 11:57 am 
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Joined: Wed Jul 26, 2017 8:16 am
Posts: 36
Location: Kirby WV
I plan to never take it to a dealer.............. Ever................ :lol:

Randy


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 Post subject: Re: 05 crd limp mode problem! please help!
PostPosted: Tue Sep 19, 2017 8:42 pm 
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Posts: 2962
Location: Central GA
Reckard wrote:
I plan to never take it to a dealer.............. Ever................ :lol:
Randy

You are a wise man! :wink:

_________________
2005 Jeep LibertyCRD Limited :JEEPIN:
Blk Brush Guard/Hella's
Ironman Springs/Bilstein's
Yeti Stage4 MaxTune
Weeks ElbowKit & Battery Tray
NO FCV/EGR
Samcos/ProVent
SunCoast&Transgo
Carter Intank-pump
2mic. Sec.Fuel Filter
Flowmaster/NOcat,
V6 Airbox
GM11 blade fan / Hayden HD clutch
98 Dodge Cummins, 5"exh. Viair, Huge K&N


Top
 Profile  
 
 Post subject: Re: 05 crd limp mode problem! please help!
PostPosted: Wed Sep 20, 2017 6:35 am 
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Joined: Wed Jul 26, 2017 8:16 am
Posts: 36
Location: Kirby WV
So I guess on my list now is Timing belt (92k currently)

And The Fun stuff;
New tires, and maybe a2.5" lift......

Randy


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