GM Passlock Electrical Wiring Short
GM Passlock Electrical Wiring Short
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Automotive Robo Tech was called to a shop on a 2003 Chevy Van G2500, with a
4.8 liter engine, experiencing a security light on followed by a no start
situation. For some reason, the shop replaced the crank sensor. Because is
was a no start, they reason it was probably the crank sensor, and of
course, it wasn't. They eventually saw the security light on, and figured
out that it was a Pass-Lock system issue. They next replaced the Pass-Lock
key cylinder, with no luck either. At this time, the shop decided to call
me in for assistance. They simply didn't have to scan tool to access the
BCM or body module for this problem.
When I arrived at the shop, the tech gave me a briefing on the vehicle, and
also said that the vehicle would start once in a blue moon. Ok, that was
probably some kind of clue. I started my diagnostic by performing a general
code analysis. I did get code P1632, or Theft Deterrent Fuel Disable Signal
Received from the BCM. There were no other codes present. I knew it wasn't
the key cylinder, since it was already replaced. There are steps to take in
all Pass Lock diagnostics before condemning a component.
In this particular GM, the signal from the ignition system is controlled by
a resistor embedded in the Pass Lock module, which is part of the ignition
switch cylinder. In these systems, any key that will allow the cylinder to
be turned to the on position will work, the only condition that must be met
is that the cylinder must be turned to a position where a magnet engages a
hall effect switch, which connects the embedded resistor to the system,
allowing the Body Control Module to read the signal value, on the yellow
Pin A6 wire, and determine if the resistance value is correct.
I analyzed the Pass Lock calibration and determined that it was correct.
So, why was this car not starting? I started to suspect an electrical or
connector fault. So I decided to visually inspect the Pass Lock module and
wiring. Everything looked normal, so I then decided to concentrate on the
BCM. As I scanned the B C M data stream for clues, I saw that all of a
sudden I lost communications.
Was the ECM defective? Or, was it an issue with the ...... Get the whole
story right here, right now!.... Watch this video and see how it ends...
Presented using advanced software CG animation and editing technology to
help you understand. Part of our Automotive Technology series shown here on
this channel. Enjoy...
2000 Saturn LS1, Starting Defect
The anti theft system in the 2000 Saturn LS1, thinks you're trying to steal
the car sometimes. You have to wait ten minutes before the 'Security'
light stops flashing. Once the security light is not flashing you can
start the car. Trying to start the car with the security light flashing
will either burn out your starter or deplete your battery!
How to bypass GM VATS
Had to do this video over again due to problems with it. This is how to get
rid of that pesky vats thing in older GM cars. Here is information on the
The content in this video is meant to help you get out of a jam with your
security system and dont have to take it in for a "dealer" fix. This is NOT
meant to show you how to break into cars so be good.
PLEASE NOTE: This is an old video! It WILL be redone and in HD.
Some of my information has changed and will be addressed in the future
If you'd like to connect with me socially:
My buddy Eric's Channel: youtube.com/user/oOSkullRipperOo
DIY How to install replace the starter on a 1999 Saturn SL2
1996 1997 1998 1999 Saturn SL2, The starter was just clicking at the
solenoid when I turn the key. I checked the fuses and relays to see if all
ok first. Also checked all the wires from the batterry to starter and
ground. If clutch switch was bad the starter would have not made a sound,
so I know it's good. I used a Samsung HMX-W200 1080p HD Camcorder
No Crank, No Start Diagnosis - EricTheCarGuy
Visit me at
Whenever you have a no start condition when attempting to start your
vehicle it's important to make the distinction between "no crank, no start"
and "crank, no start" situations as they are treated differently. This
video covers what I do when confronted with a 'no crank, no start'
situation and in this case it's a worst case scenario so be sure to watch
till the end.
Starter diagnosis video
No start basics video
Parasitic draw video
Click below and Stay Dirty
Visit me at EricTheCarGuy.com
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GM passlock problem
2001 Impala Base 114,xxx miles.
Runs & drives perfect, except....
GM replaced BCM computer 9-09. Accomplished nothing.
I replaced ignition switch w/NAPA part 10-09-09. Worked great for 2 weeks.
Then started having the same ole trouble.
I replaced ignition key tumbler switch w/passlock sensor w/NAPA part
No problems until this week 1-13-10.
Still doing the same exact thing it was doing before I replaced anything.
Hasn't started any day this week. 10 minute wait, etc. will not work.
Starts when it wants to.
Anyone have any ideas on how to properly repair this chronic problem?
----NOTE----the problem is fixed.
Cleaned the contacts on the BCM computer fuse.
That's all it took. If your car is exhibiting symptoms exactly like mine
did, I'd try that 1st.
Cutting White Wire on Saturn Ion to Fix Starting Issue
UPDATE 3/21/2014: My car is still working fine. I still have not had a
problem with it starting since I posted this video 5 years ago. Still on
the same battery. Thanks for all the comments!
This is me showing how I cut the passlock wire on my car. My car would not
start on damp, cold mornings, often taking 30 - 40 minutes to get it to
start. After reading several forums I found users who were doing this to
"fix" the problem. I thought I would tape this for anyone who was thinking
of doing the same but doesn't know anything about cars. Like me. :)
Note: I owe thanks to meron for the post at this link
http://townhall-talk.edmunds.com/direct/view/.f1137a7/83 it is where I
first heard about this solution.
Update 10.6.2012: I added a switch, I believe it was this one
http://www.radioshack.com/product/index.jsp?productId=2062533 I installed
it with it in the off position, started the car, switched it to On while
the car was running and the service engine light went away. Car started
fine after that. I just shut it off again as it was cold one morning this
week and I had trouble getting the car started. Once I got it running,
turned it off and haven't had trouble starting it since. YMMV
2002 SATURN L100 BCM
This is my 2002 Saturn L100 2.2L with a faulty BCM (Body Control Module).
If your Saturn is doing this then a new GM part is worth over $600. I have
looked all over the internet for a video like this to confirm that this is
the problem with no luck. I figured I would show you my experience so when
a GM tech looks at you like you are retarded when you tell him the symptoms
you can say your not the only one.
how to install an alarm car security system
learn how to install an alarm in a vehicle . this how to video is very
detailed . installing an alarm is an advanced installation and should only
be attempted by someone who is has all ready had some sort of car audio
training. in the video i go over the basics of an alarm install including
how to find the wires tech notes, door lock circuits, door pins,12 volt
constant, switched ign, ground, and much more
Engine Won't Start - No Crank Diagnosis (Troubleshooting Starting System Issues)
In this video I show you how to diagnose a no crank condition on a 1997
Honda Accord but the techniques shown here can be used on any vehicle.
A no crank means when the ignition switch is turned to the start position
the starter doesn't crank the engine.
To troubleshoot this issue I cover battery testing with a load tester,
solenoid trigger wire testing, and voltage drop testing with a multimeter
on the power and ground side of the starter.
I also cover how a relay works, how the starter solenoid works, and explain
what the neutral safety switch is and how it's incorporated into different
start circuit designs.
Starter Replacement Video for this Accord:
Intro and outro music Welcome To The Show by Kevin Macleod
Due to factors beyond the control of Bushougoma, it cannot guarantee
against unauthorized modifications of this information, or improper use of
this information. Bushougoma assumes no liability for property damage or
injury incurred as a result of any of the information contained in this
video. Bushougoma recommends safe practices when working with the tools or
equipment seen or implied in this video. No information contained in this
video shall create any express or implied warranty or guarantee of any
particular result. Any injury, damage or loss that may result from improper
use of these tools, equipment, or the information contained in this video
is the sole responsibility of the user and not Bushougoma.
How to diagnose a bad starter, ignition, neutral safety switch!
The re are 3 wires or electrodes on all starters. One is the large bolt
that is attached to the main positive battery cable. One is the small wire
that is sometimes purple that is attached to the ignition switch "key". And
one is just a copper wire or electrode that supplies a ground/power to the
starter from the solenoid.
GM Pass Key II Malfunctions: Bypassing V.A.T.S System
Your car won't start? SECURITY light steady lit or flashing? More then
likely it is the Vehicle Anti Theft System (V.A.T.S) at fault. Over time
the resister pellet imbedded in your car key wears out from years of
inserting and removing from the ignition lock cylinder. Here is a cheap way
to bypass it, so you can get back on the road.
2004 Saturn ION Starting Problems
This problem occurs once in awhile and is more common in cold weather,
where the car does not want to start or even try to turn over at all. If
you wait about 20 minuets without trying to start the engine and try again
later it sometimes works, what could be the cause of this problem?
How To Test A Car Starter With A Screwdriver And Jumper Cables!
Check Out My Channel And Subscribe!!
How to test a starter with a screwdriver and jumper cables ..on and off the
car..how to troubleshoot a bad starter.. Troubleshooting DIY ... How To
Bench Test A Starter. Solenoid diagnosis . How To Test Your car starter .
Como checar el motor de arranque solenoide .. check oy my channel!!