2001 Olds Alero 3400
Warning lights = dash is inop.
Computer codes: there is no communication with pcm or anything
else.
Repairs for this_problem = Switched out pcm.
Question: Can you help me find the wire or wiring I need to test?
There's no communication with PCM.
Warning lights = dash is inop.
Computer codes: there is no communication with pcm or anything
else.
Repairs for this_problem = Switched out pcm.
Question: Can you help me find the wire or wiring I need to test?
There's no communication with PCM.
Answer: The communication wire on this and most GM vehicles is a
purple wire. All modules on this car "Talk" on the same wire. It is
terminal 59 in the blue connector on the PCM. On the Alero they all
connect at a central point inside the left dash fuse block. I would say
it probably isn't a wiring problem unless you replaced the PCM to try
to fix this same no communication problem. The PCM you installed in
the car needs to be programmed to the car. Even if you got a PCM
out of a matching vehicle, it still won't work and have no
communication because the VIN is different. Assuming you purchased
a new computer, there is no operating system or information
pertaining to you vehicle on it. Attempting to communicate with it
before programming would result in an error and no information would
be given. The only way to properly program a new PCM is using the
GM computer system at a GM dealership. After programming, there
are a couple other procedures that need to be done. A Crankshaft
Variation learn procedure needs to be performed, and the oil life
monitor needs to be set to the correct percentage. That should solve
your problems.
purple wire. All modules on this car "Talk" on the same wire. It is
terminal 59 in the blue connector on the PCM. On the Alero they all
connect at a central point inside the left dash fuse block. I would say
it probably isn't a wiring problem unless you replaced the PCM to try
to fix this same no communication problem. The PCM you installed in
the car needs to be programmed to the car. Even if you got a PCM
out of a matching vehicle, it still won't work and have no
communication because the VIN is different. Assuming you purchased
a new computer, there is no operating system or information
pertaining to you vehicle on it. Attempting to communicate with it
before programming would result in an error and no information would
be given. The only way to properly program a new PCM is using the
GM computer system at a GM dealership. After programming, there
are a couple other procedures that need to be done. A Crankshaft
Variation learn procedure needs to be performed, and the oil life
monitor needs to be set to the correct percentage. That should solve
your problems.
Question: I have a 2001 Oldsmobile Alero and their is a faint knocking or ticking sound when the car is running is
that the rod or piston going bad in motor my car has a low knocking sound. What could it be.
Answer: Well, that depends on if it is a knocking or ticking. Knocking is usually a problem in the lower end of the
motor- rod or rod bearings. Ticking is usually top end- rocker arm or lifter. Is it louder when the engine is cold or
heated up?
Visitor: I think when it's cold
Tech: Louder cold on the 3.4L V6 engine is actually a normal condition on that engine. It is from what is called piston
slap and does not really do any damage. It will usually get a little quitter when it heats up.
Visitor: thats exactly what it's doing but it the first time I've really heard it since i purchased two months ago. Now all
my lights come on in my dash sometimes they off come right back on check engine light stays on my horn beep
when I lock my door some times does that mean I have a alarm. The light come on when i am driving or on and off
when i start the car sometime they go off on their own if the car heats up for 10 minutes pop back on again.
Tech: OK. Well, be sure to check the oil level. Check the coolant and make sure it does not look milky. Remove the
oil fill cap and look for milky residue. If all this looks OK, then it is not something to worry about as this is a normal
characteristic of this engine. It should either beep on the second press of the lock button, or if on the first, it should
do it every time. The check engine light on means there is a problem in the emission system and the computer
needs to be scanned for codes. This can be done for free at most of the large national parts store chains.
Okay thank you. I'm a female who doesn't know about cars.
Okay I know you understand because everything you say is what it's doing thank you .
Glad to help. Get the codes scanned and have the fluids checked like i stated above.
that the rod or piston going bad in motor my car has a low knocking sound. What could it be.
Answer: Well, that depends on if it is a knocking or ticking. Knocking is usually a problem in the lower end of the
motor- rod or rod bearings. Ticking is usually top end- rocker arm or lifter. Is it louder when the engine is cold or
heated up?
Visitor: I think when it's cold
Tech: Louder cold on the 3.4L V6 engine is actually a normal condition on that engine. It is from what is called piston
slap and does not really do any damage. It will usually get a little quitter when it heats up.
Visitor: thats exactly what it's doing but it the first time I've really heard it since i purchased two months ago. Now all
my lights come on in my dash sometimes they off come right back on check engine light stays on my horn beep
when I lock my door some times does that mean I have a alarm. The light come on when i am driving or on and off
when i start the car sometime they go off on their own if the car heats up for 10 minutes pop back on again.
Tech: OK. Well, be sure to check the oil level. Check the coolant and make sure it does not look milky. Remove the
oil fill cap and look for milky residue. If all this looks OK, then it is not something to worry about as this is a normal
characteristic of this engine. It should either beep on the second press of the lock button, or if on the first, it should
do it every time. The check engine light on means there is a problem in the emission system and the computer
needs to be scanned for codes. This can be done for free at most of the large national parts store chains.
Okay thank you. I'm a female who doesn't know about cars.
Okay I know you understand because everything you say is what it's doing thank you .
Glad to help. Get the codes scanned and have the fluids checked like i stated above.