A 4-Wheels Thread About Absolutely Nothing!

[The Highlander]

yup, old OBD-I vehicles cant do any thing with misfire condition only way you can feel the shaky engine.
Many people don't understand what different is the OBD-I and OBD-II. One simple sentence for OBD-I..... OBD-I PCM is reading the sensors for open or short circuit and doesn't test cat converters.
OBD-II PCM is monitoring misfire, EVAP, cat converters, engine sensors, etc etc, can test on cat converters by monitoring front and rear O2 sensors as the PCM protect cat converters. Many times I've been see code P0420 or P0430 cat converter efficiency below threshold value bank 1 or bank 2 on the OBD-II vehicles, they were caused by misfire condition or overfilled oil in crankcase.
They can be fix by clear codes after check oil level or the root of misfire
diagnosis. If code P0420/P0430 persists, replace cat converters. Costly repairs.

Right.

Whoa! I just learned today that 96 toyota Camry have three ports for OBD I and OBD II. One OBD II near engine and OBDI and OBDII under the dashboard.

Looks like Toyota was last min to make a plan for OBD II after 1996.

 

[sequoias]

Wirelessly posted

Hmm, it sounds like the V4 mode cant be used reliabity in idling mode or city driving mode...only activates during light load, ie easing the throttle or very slow acceleration. We averaged 16 mpg on the computer...but they advertised 22 hwy...hmm.

 

[The Highlander]

Wirelessly posted

Hmm, it sounds like the V4 mode cant be used reliabity in idling mode or city driving mode...only activates during light load, ie easing the throttle or very slow acceleration. We averaged 16 mpg on the computer...but they advertised 22 hwy...hmm.

It's GM thing. You can't image how many product GM did and they failed.

Quadrasteer
Heated Wiper Fluid System
...etc I can't remember what other.

New GM vehicles, you can't removed the stock radio out or On-star, AC/heater, and headlight will disable.

 

[sequoias]

It's GM thing. You can't image how many product GM did and they failed.

Quadrasteer
Heated Wiper Fluid System
...etc I can't remember what other.

New GM vehicles, you can't removed the stock radio out or On-star, AC/heater, and headlight will disable.

Yeah....GM, FAIL! Honda Prelude had the 4 wheel steering, too.

 

[deafsmogtech]

Right.

Whoa! I just learned today that 96 toyota Camry have three ports for OBD I and OBD II. One OBD II near engine and OBDI and OBDII under the dashboard.

Looks like Toyota was last min to make a plan for OBD II after 1996.

Early OBD-II models are not 100 percent developing in PCM software that may not able to control the emission well, after 2000 model year are better and able to met the California's stringest emissions but not always, depend on the vehicle manufacture's emission design. I've been seen many P0420s, cat converter efficiency below threshold value bank 1 on Asian cars like Toyotas, Hondas, Nissans and other cars with 4 cylinder engines. Those vehicles were high mileages. Also Nissan V6s for P0420 and P0430 too. Few P0420 or P0430 on 2000 model year.

 

[deafsmogtech]

Wirelessly posted

Hmm, it sounds like the V4 mode cant be used reliabity in idling mode or city driving mode...only activates during light load, ie easing the throttle or very slow acceleration. We averaged 16 mpg on the computer...but they advertised 22 hwy...hmm.

I was not thought of my scan tool to plug the GM vehicle's OBD-II jack to see the V4 operation while driving. Someday I catch a customer's GM suv to play with my scan tool to see if it come up with a V4 functional.

 

[deafsmogtech]

It's GM thing. You can't image how many product GM did and they failed.

Quadrasteer
Heated Wiper Fluid System
...etc I can't remember what other.

New GM vehicles, you can't removed the stock radio out or On-star, AC/heater, and headlight will disable.

yeah, lot of problems but I love GM vehicles cuz the live datas or functional tests in the PCM are easy to working with scan tools and easy to fix.
You dont need a scope lab to diagnose the misfire condition, just observe the misfire counts in the live data, you pinpoint which is misfire cylinders. You can select functional test menu in scan tool to do fuel injector balance test, EGR valve test, fuel pressure test, many more tests that make you easy diagnose. Nice work, sometime they are hard to fix.

Hey, Degrade OEM accessory like radio, navigate or other things, that can be interfere the PCM communication, causes no start condition.

Same as European vehicles, I happened to a 2000ish VW Jetta that the smog machine cant communicate with the OBD-II then I grabbed my scan tool to plug the jack still no communicate. I dont understand it, somehow I overlooked the aftermarketed radio and I back to get a look at the radio. I was not sure if it caused no OBD-II communication. I checked the repair infro, then I was surprised to see the TSB that states aftermarketed radio will cause no OBDII communication even no driveability symptom. I advised a customer about it. Sad.

 

[The Highlander]

yeah, lot of problems but I love GM vehicles cuz the live datas or functional tests in the PCM are easy to working with scan tools and easy to fix.
You dont need a scope lab to diagnose the misfire condition, just observe the misfire counts in the live data, you pinpoint which is misfire cylinders. You can select functional test menu in scan tool to do fuel injector balance test, EGR valve test, fuel pressure test, many more tests that make you easy diagnose. Nice work, sometime they are hard to fix.

Hey, Degrade OEM accessory like radio, navigate or other things, that can be interfere the PCM communication, causes no start condition.

Same as European vehicles, I happened to a 2000ish VW Jetta that the smog machine cant communicate with the OBD-II then I grabbed my scan tool to plug the jack still no communicate. I dont understand it, somehow I overlooked the aftermarketed radio and I back to get a look at the radio. I was not sure if it caused no OBD-II communication. I checked the repair infro, then I was surprised to see the TSB that states aftermarketed radio will cause no OBDII communication even no driveability symptom. I advised a customer about it. Sad.

I agreed with you. We use third-party scan tool from school to plug any GM and it's nice to view on the functional and test like you said without scope tool.

I don't like some network degree. Some vehicles use token ring network for PCM and it's big risk for problem and very hard to diagnose. I like star network over token ring network for easy diagnose and less trouble.

This is star network, if one computer shut down and other computers still run fine.

This is ring netweork, if one computer shut down and whole stop work for communication.

You get a idea.

 

[Jiro]

N.J. to end auto inspections except for emissions

TRENTON — New Jersey's motor vehicle chief says the state will stop inspecting privately owned motor vehicles for mechanical defects beginning Aug. 1.

Motor Vehicle Commission Chief Administrator Raymond Martinez said Friday that vehicles will still be tested for emissions, but not until they're five years old.

Martinez said the changes will save the state about $17 million a year.

New Jersey will become the 30th state that doesn't inspect for mechanical defects.

Martinez said the MVC will continue a public education campaign to encourage motorists to take proper care of their cars and trucks. Police can still cite motorists for equipment problems such as broken headlights or tail lights.

 

[diehardbiker]

Yeah, same with bus topology, it sucks same thing with ring topology.

I agreed with you. We use third-party scan tool from school to plug any GM and it's nice to view on the functional and test like you said without scope tool.

I don't like some network degree. Some vehicles use token ring network for PCM and it's big risk for problem and very hard to diagnose. I like star network over token ring network for easy diagnose and less trouble.

This is star network, if one computer shut down and other computers still run fine.

This is ring netweork, if one computer shut down and whole stop work for communication.

You get a idea.

 

[deafsmogtech]

N.J. to end auto inspections except for emissions

Interesting. No mechanical inspections in Calif. Just emission and brake/lamp inspections.

 

[diehardbiker]

Hope NYS follows suit, eh eh.

N.J. to end auto inspections except for emissions

 

[sequoias]

You know, there are some dumb people out there. There's a guy who bought a Chevy Colorado 4 door pick up truck, but it's a 4x2 and he lives here in Iowa. It's my girlfriend's step-dad. Let's see how he can handle it in winter.

 

[The Highlander]

You know, there are some dumb people out there. There's a guy who bought a Chevy Colorado 4 door pick up truck, but it's a 4x2 and he lives here in Iowa. It's my girlfriend's step-dad. Let's see how he can handle it in winter.

My father in law own Chevy Silverado and it's a 4x2. No wonder he keeps warn to us about bad icy road and made us to go other long way without icy road but I ignored him and we drove thru bad icy road on Subaru's AWD, Ford Focus 05 without ABS and VW Rabbit's FWD ETC (electronic throttle control) and we have no problem with that. I noticed Rabbit's FWD ETC is easy than Focus's FWD without ETC.

I remembered I drive Ford F150's 4x2 thru icy road and truck almost get out of control like roll around and I had to move steer more quick than normal till it become stable. I believe RWD was my first time to drive thru icy road. I grew up with FWD without ABS and AWD for many years and no problem thru

I believe RWD without ETC is very risk for icy road. My mom do own BMW 00' and it's a RWD with ETC and she don't complained anything about snow and icy road since 2000 from Chicago. She told me that her RWD with ETC is very smooth than FWD without ETC from her old Toyota Collora 94' for heavy rain, snow, icy road, and mud.

 

[sequoias]

My father in law own Chevy Silverado and it's a 4x2. No wonder he keeps warn to us about bad icy road and made us to go other long way without icy road but I ignored him and we drove thru bad icy road on Subaru's AWD, Ford Focus 05 without ABS and VW Rabbit's FWD ETC (electronic throttle control) and we have no problem with that. I noticed Rabbit's FWD ETC is easy than Focus's FWD without ETC.

I remembered I drive Ford F150's 4x2 thru icy road and truck almost get out of control like roll around and I had to move steer more quick than normal till it become stable. I believe RWD was my first time to drive thru icy road. I grew up with FWD without ABS and AWD for many years and no problem thru

I believe RWD without ETC is very risk for icy road. My mom do own BMW 00' and it's a RWD with ETC and she don't complained anything about snow and icy road since 2000 from Chicago. She told me that her RWD with ETC is very smooth than FWD without ETC from her old Toyota Collora 94' for heavy rain, snow, icy road, and mud.

Yeah, my car has no abs and no ETC...and I'm doomed, lol. I guess his truck does have ETC because it's mid 2003 or 2004. I drove my car thru snow and ice before and made it through.

 

[The Highlander]

Yeah, my car has no abs and no ETC...and I'm doomed, lol. I guess his truck does have ETC because it's mid 2003 or 2004. I drove my car thru snow and ice before and made it through.

Hard to tell. Most european cars (not cheapass) use ETC since 80's. GM finally add ETC around five years ago. I am not sure if GM 2003 or 2004 have ETC. Most japanese vehicles finally add ETC but I played on Honda FIT's engine and I don't see any ETC at all. I guess owner is cheap since he picked very basic one.

Good news. Federal motor vehicle safety standard ESC requires that all vehicles by Sept 1, 2011. (2012 model year vehicles)


I just found it out.

http://autos.msn.com/research/vip/spec_safety.aspxyear=2004&make=Chevrolet&model=Colorado&trimid=-1

Maybe Chevy do have one but it said "Traction Control Opt."

 

[The Highlander]

Yeah, my car has no abs and no ETC...and I'm doomed, lol. I guess his truck does have ETC because it's mid 2003 or 2004. I drove my car thru snow and ice before and made it through.

We already have skill for winter then we are good to go.

I won't let anyone from southwest to drive without ABS/ETC at winter.

No wonder, Texas got lighter snow and most business and school are closed already. My Iowa college still open during four inches snow.

 

[sequoias]

Hard to tell. Most european cars (not cheapass) use ETC since 80's. GM finally add ETC around five years ago. I am not sure if GM 2003 or 2004 have ETC. Most japanese vehicles finally add ETC but I played on Honda FIT's engine and I don't see any ETC at all. I guess owner is cheap since he picked very basic one.

Good news. Federal motor vehicle safety standard ESC requires that all vehicles by Sept 1, 2011. (2012 model year vehicles)


I just found it out.

http://autos.msn.com/research/vip/spec_safety.aspxyear=2004&make=Chevrolet&model=Colorado&trimid=-1

Maybe Chevy do have one but it said "Traction Control Opt."

Interesting....yes some Chevy cars and trucks have it. My friend's 2001 VW Passat has ETC.

 

[deafsmogtech]

Hard to tell. Most european cars (not cheapass) use ETC since 80's. GM finally add ETC around five years ago. I am not sure if GM 2003 or 2004 have ETC. Most japanese vehicles finally add ETC but I played on Honda FIT's engine and I don't see any ETC at all. I guess owner is cheap since he picked very basic one.

Good news. Federal motor vehicle safety standard ESC requires that all vehicles by Sept 1, 2011. (2012 model year vehicles)


I just found it out.

http://autos.msn.com/research/vip/spec_safety.aspxyear=2004&make=Chevrolet&model=Colorado&trimid=-1

Maybe Chevy do have one but it said "Traction Control Opt."

ETCs on the euro vehicles since 80's? I dont know. Bosch developed ETC systems on some German vehicles such as MBZ or BMW in early 1995. I dont know exact what model year the ETC used.
The ETCs in the newer vehicles, use APP (accelerator pedal position) sensor and throttle sensor, both sensors have 2 or 3 potentiometers in each sensor, Why? PCM need backup or failsafe similar to limp-in in event of failed potentiometer like open or short wire or bad contacts etc. If the throttle control module detects fault sensor(s) then flag to a PCM then PCM regulate
the vehicle to limited speed. Not all vehicles.
Try google, type "Throttle-by-wire" under name of AA1CAR.com. Hope you enjoy to reading. Nice infro.

 

[The Highlander]

ETCs on the euro vehicles since 80's? I dont know. Bosch developed ETC systems on some German vehicles such as MBZ or BMW in early 1995. I dont know exact what model year the ETC used.
The ETCs in the newer vehicles, use APP (accelerator pedal position) sensor and throttle sensor, both sensors have 2 or 3 potentiometers in each sensor, Why? PCM need backup or failsafe similar to limp-in in event of failed potentiometer like open or short wire or bad contacts etc. If the throttle control module detects fault sensor(s) then flag to a PCM then PCM regulate
the vehicle to limited speed. Not all vehicles.
Try google, type "Throttle-by-wire" under name of AA1CAR.com. Hope you enjoy to reading. Nice infro.

In 1988, BMW was the first vehicle manufacturer to offer electronic throttle control on its 7-Series cars. In 1997, Chevrolet opted for "Throttle Actuator Control" (TAC) on its C5 Corvette.

Throttle-By-Wire

deafsmogtech,
Maybe you need read whole because it already answer your question.
Just Kidding.

I was wrong about GM. I don't know that GM made ESC for Corvette in 1997.