Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Chevy

2003 saturn vue: security system, vehical..light comes..locking..doors

Customer Question
2003 saturn vue, having...
2003 saturn vue, having trouble with security system, vehical has a problem with the system, car will not always start, when the car does start it will run normal, butat times when car is started the security light comes on and the fuel pump will not turn on. (i know this is what it supposed to do). the remote works at locking and unlocking the doors (batteries have been just changed). aanother problem is that the dealer will not check out the system, because the vehical is registered to my daughter, who is currently outside the u.s., she left the vehical with my wife to use in her absence, my wife has had to stop using the vehical, because it has malfuncion leaving her stranded, at nite , my wife is in her 60s and comes from work after dark, on a old two lane mountain road. is there anyway to disarm the security system in an emergency so that she can move the vehical.
Submitted: 9 years ago.Category: Chevy
Show More
Show Less
Ask Your Own Chevy Question
Answered in 14 minutes by:
3/24/2008
Chevy Mechanic: goodwrench9124, ASE Certified Technician replied 9 years ago
goodwrench9124
goodwrench9124, ASE Certified Technician
Category: Chevy
Satisfied Customers: 3,432
Experience: Ase Master Certified, GM Master Certified Tech. Awarded GM Top performer, Hybrid certified
Verified

Hello and welcome to JA!!!, there are many things that can cause this security light to come and cause a no start. the only real way to properly diag this system is with a class two scan tool. normally done at the dealer. not sure why the dealer wont work on??? I have included how the system works and how complex it is. I have also included a relearn process that you can do yourself. this might get you out of a pinch and may correct concern. but more than likely it will need to be checked out by a dealer..

 

30 Minute Learn Procedure

 

  1. Turn ON the ignition, with the engine OFF.
  2. Attempt to start the engine, then release the key to ON, vehicle will not start.
  3. Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.
  4. Turn OFF the ignition, and wait 5 seconds.
  5. Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes, the vehicle is now ready to relearn the PasslockTM Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK.

    Important: The vehicle learns the PasslockTM Sensor Data Code and/or password XXXXX the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.

  6. Start the engine. The vehicle has now learned the PasslockTM Sensor Data Code and/or password.
  7. With a scan tool, clear any DTCs if needed. History DTCs will self clear after 100 ignition cycles.

Vehicle Theft Deterrent (VTD) Description and Operation

PasslockTM System

The theft deterrent system has been incorporated into the body control module (BCM). The theft deterrent is provided in order to prevent the vehicle operation if the correct key is not used in order to start the vehicle. The ignition key turns the lock cylinder. The cylinder rotation produces an analog voltage code in the PasslockTM sensor. This voltage code is received by the BCM. The BCM compares the voltage code to the previously learned voltage code. If the codes match, a class 2 message is sent from the BCM to the powertrain control module (PCM)/vehicle control module (VCM). The message enables the fuel injectors.

The design of the PasslockTM system is to prevent vehicle theft by disabling the engine unless the ignition lock cylinder rotates properly by engaging the correct ignition key. The system is similar in concept to the PASS-Key® system. However, the PasslockTM system eliminates the need for a key mounted resistor pellet. The components of the PasslockTM system are as follows:

The ignition lock cylinder
The ignition switch
The PasslockTM sensor
The Body control module (BCM)
The security telltale
The vehicle/powertrain control module (VCM/PCM)

Ignition Lock Cylinder and Housing

The ignition lock cylinder is located at the upper right side of the steering column. The PasslockTM sensor is in the steering column. The PasslockTM sensor is separate from the key and lock cylinder. The key and the lock cylinder work together in order to determine if the proper ignition key was used to start the vehicle.

In the event of an open Class 2 serial data line between the BCM and the VCM/PCM, the vehicle will become fail-enabled if the VCM/PCM has already received the password XXXXX the BCM for that ignition cycle, the engine is running. In this event, the following conditions occur:

The security telltale will be ON continuously.
The VCM/PCM will become fail-enabled for future ignition cycles.

If a failure in the Class 2 serial data line occurs before the ignition cycle, when the VCM/PCM is not fail-enabled, the following conditions occur:

The VCM/PCM will never receive a valid password XXXXX order to enable the fuel injectors.
The vehicle will not start.

Ignition Switch

The lock cylinder and the visible key insert portion of the ignition switch are located at the upper right side of the steering column. The electrical switching portion of the assembly is separate from the key and lock cylinder. The electrical switch portion is hidden inside the steering column. The electrical switch portion and the key and lock cylinder synchronize and work in conjunction through the action of the mechanical assembly between the 2 parts.

PasslockTM Sensor

The PasslockTM sensor is inside the ignition cylinder lock housing. The PasslockTM sensor contains 2 hall effect sensors. The tamper hall effect sensor is on the top. The security hall effect sensor is under the tamper hall effect sensor. Both of the hall effect sensors monitor the magnet of the lock cylinder through an opening. The tamper hall effect sensor is physically placed on top of the security hall effect sensor. This arrangement enables the tamper hall effect sensor to engage first if an intruder attempts to bypass the PasslockTM sensor by placing a large magnet around that area of the steering column. There is a tamper resistor inside the PasslockTM sensor in order to help prevent tamper to the system. PasslockTM equipped vehicles have a selection of 10 different security resistors ranging from 0.5K ohms up to 13.6K ohms. Installing one of the security resistors inside the PasslockTM sensor will generate a unique PasslockTM code. All 10 combinations of the PasslockTM sensor have the same part number. However, you cannot simply replace the PasslockTM sensor and expect the system to operate properly. Always start by performing the Diagnostic System Check first and following the instructions.

Body Control Module

The Body Control Module (BCM) contains the theft deterrent system logic. The BCM reads the PasslockTM data from the PasslockTM sensor. If the PasslockTM data is correct, the BCM will pass theft. The BCM will then transmit the fuel continue password XXXXX the VCM/PCM.

During the tamper mode the vehicle may start. The vehicle will then stall. If the BCM receives the wrong PasslockTM data, the VTD will immediately go into the tamper mode. The tamper mode will lock-out the vehicle fuel injectors for 10 minutes. The SECURITY indicator will flash while the VTD is in the tamper mode.

If the PasslockTM sensor sends a correct password XXXXX the BCM when the ignition is in the ON position, the BCM will send a fuel enable signal to the VCM/PCM. The VCM/PCM will not disable the fuel due to any BCM message for the remainder of the ignition cycle.

SECURITY Telltale

The SECURITY telltale appears on the message center inside the instrument cluster. If the SECURITY telltale flashes or if the SECURITY telltale lights continuously during the vehicle operation, refer to the system diagnosis.

Vehicle/Powertrain Control Module

The VCM/PCM communicates with the BCM over the Class 2 serial data line. When the BCM determines a no start condition, it sends a Class 2 serial data password XXXXX the VCM/PCM in order to disable the fuel injection system. If the BCM receives the expected voltage from the PasslockTM sensor, the BCM sends a class 2 serial data password XXXXX the VCM/PCM in order to enable the fuel injection system. The VCM/PCM then allows the vehicle to start correctly. If the Class 2 serial data password XXXXX the BCM to the VCM/PCM is not within the Vehicle Security Status Message, the fuel injectors will shut OFF during a start attempt. The SECURITY telltale will be illuminated for 10 minutes. If the VCM/PCM does not receive the same password XXXXX the BCM as the last learned one, the vehicle will start and then stalls due to the Fuel Lockout.

Fuel Lockout Cycle

The PasslockTM system has a lockout cycle of approximately 10 minutes. Once the vehicle is in the lockout cycle, the vehicle remains in the lockout cycle for 10 minutes, even if the ignition switch is turned from the RUN position to the OFF position.

The PasslockTM system uses the lockout cycle in order to synchronize all of the PasslockTM components when any PasslockTM related part is changed. The PasslockTM system requires 3 consecutive lockout cycles in order to complete the 30 minute learn procedure for a changed component.

Changing the PasslockTM Components

The design of the PasslockTM system is to prevent theft even if the various theft deterrent parts change. The parts that can no longer be changed without the possibility of going into a tamper mode are:

The PasslockTM sensor
The BCM
The VCM/PCM

If you replace any of these parts the vehicle may start and stall for 10 minutes. This is the long tamper mode. If this occurs, the system must go through a long tamper mode cycle. During this time the SECURITY telltale will be flashing for the full 10 minutes and the DTC B3031 will be set. The BCM and the VCM/PCM require the full 10 minutes in order to complete a learn cycle. The ignition switch must remain in the RUN position until the SECURITY telltale stops flashing. You will need to repeat the cycle if the ignition switch does not remain in the RUN position. When replacing any of the above parts it is recommended to perform the Programming Theft Deterrent System Components procedure.

The design of the PasslockTM system is to prevent the vehicle operation if the proper ignition key is not used in order to start the vehicle. The mechanical key, in normal operation, will turn the ignition lock cylinder. The PasslockTM sensor monitoring the position of the lock cylinder will relay the PasslockTM data to the body control module (BCM). The BCM will determine the validity of the PasslockTM data. The BCM will send a fuel continue password XXXXX the vehicle/powertrain control module (VCM/PCM). When the VCM/PCM receives the correct password XXXXX VCM/PCM allows the fuel injectors to operate normally. The PasslockTM system requires the VCM/PCM and the BCM to communicate the various functions in order to operate. These functions transmit over the class 2 serial data line. For an explanation of the class 2 serial data description and operation, refer to Data Link Communications Description and Operation in Data Link Communications.

 

goodwrench9124
goodwrench9124, ASE Certified Technician
Category: Chevy
Satisfied Customers: 3,432
Experience: Ase Master Certified, GM Master Certified Tech. Awarded GM Top performer, Hybrid certified
Verified
goodwrench9124 and 87 other Chevy Specialists are ready to help you
Ask your own question now
Ask goodwrench9124 Your Own Question
goodwrench9124
goodwrench9124
goodwrench9124, ASE Certified Technician
Category: Chevy
Satisfied Customers: 3,432
3,432 Satisfied Customers
Experience: Ase Master Certified, GM Master Certified Tech. Awarded GM Top performer, Hybrid certified

goodwrench9124 is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money.

Todd LRochester NY

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

GM Tech (Cam)

GM Tech (Cam)

Chevy Technician

15,249 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

9,196 satisfied customers

15 years GM master tech

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

8,847 satisfied customers

Have owned a repair shop for 25 yrs.

Dave Nova

Dave Nova

Chevrolet Technician

7,092 satisfied customers

ASE Master Certification. GM World Class Certification

John

John

Master A.S.E Automotive technician

4,071 satisfied customers

A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician

Don - Mo Lurch

Don - Mo Lurch

Auto Mech / Electronics

2,900 satisfied customers

Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

Ron Z.

Ron Z.

- Chevy Tech -

2,682 satisfied customers

18+yrs experience. State Inspector and Chevy Diagnostics

< Previous | Next >

Related Chevy Questions
Flashing interior/exterior lights during deceleration.
Flashing interior/exterior lights during deceleration … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
My 5.3 motor is starting to make knocking sound where the
My 5.3 motor is starting to make knocking sound where the rocker arms are in the morning. … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
3,943 satisfied customers
2003 suburban. just installed tranny and now engine in fail
2003 suburban. just installed tranny and now engine in fail safe mode … read more
Ivan Alvarez
Ivan Alvarez
Lead technician
148 satisfied customers
My transmission is jerking between 1st and 2nd and is
my transmission is jerking between 1st and 2nd and is automatic. Not noticed in regular driving but in stop and go. A little hesitaion between 2nd and 3rd. … read more
Matt
Matt
Engineer
Bachelor\u0027s Degree
5 satisfied customers
The head gasket blew and the head also got a hole in it.
The head gasket blew and the head also got a hole in it. Both were replaced but the oil pressure reads low after the engine heats up to normal temp. what do you think is the problem? … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
3,943 satisfied customers
I have a 1998 Chevy short wheel base Stepside with a 4.3 V6.
Second opinion] I have a 1998 Chevy short wheel base Stepside with a 4.3 V6 . I have lost the power if I give it gas to get up on the interstate backfires sputters acts like it don't want to go then i… read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
1995 Chevy Blazer 4.3L 4WD Have replaced fuel pump, fuel
1995 Chevy Blazer 4.3L 4WD Have replaced fuel pump, fuel pressure regulator, distributor cap and rotor, plugs and wires, and most recently the oxygen sensor (upstream). Fuel pressure is good at schrae… read more
rpmdiag
rpmdiag
High school
7,117 satisfied customers
I have a 2008 Chevy Silverado Four-door with a Duramax I
I have a 2008 Chevy Silverado Four-door with a Duramax I need to find the remote control module for my keyless entry … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
I changed the high pressure hose from the hydraboost to the
I changed the high pressure hose from the hydraboost to the steering gear on my 2004 Silverado 6.6 duramax. It is hard to turn the wheel as if the power steering is not working. Suggestions? … read more
Mechanic01
Mechanic01
1,164 satisfied customers
I have a 2006 GMC Envoy 6cyl., The check engine light is on
I have a 2006 GMC Envoy 6cyl., The check engine light is on and the analyser indicate a fan speed sensor is the problem. Is the sensor located in the clutch assembly. In other words, if I replace the … read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
I have a engine out of a 1996 Chevy 3/4 ton truck 4l80e
I have a engine out of a 1996 Chevy 3/4 ton truck 4l80e going into a 1996 Chevy 1/2 truck 4l60e do I have to change flywheel on this for different trans?… read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
97 satisfied customers
The service engine soon light came on. I changed gas
the service engine soon light came on. I changed gas stations the other day. it could be water in the tank … read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,196 satisfied customers
I have replaced the fuel pump, fuel pump relay. glow plugs,
I have replaced the fuel pump, fuel pump relay. glow plugs, on my 95 gmc 6.5 turbo, with 311,000 miles. I can get it started but it will not stay running, I opened the fuel filter housing and it is em… read more
roy
roy
Associate Degree
3 satisfied customers
I have a 2010 Chevy hhr 2.4 with a P0011 code for timing
I have a 2010 Chevy hhr 2.4 with a P0011 code for timing over advanced. Tried replacing the intake VVT solenoid already and changed oil. Code is a hard fault and cannot be cleared. Tried clearing with… read more
vwtech0405
vwtech0405
VW Technician
Associate Degree
8,868 satisfied customers
94 chevy pick up 3/4 ton turned off like it ran out of gas.
94 chevy pick up 3/4 ton turned off like it ran out of gas. Replaced gas filter and spark plugs. Gas is squirting out of tbi and I have spark. Still not starting. … read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
97 satisfied customers
I have a 1992 Chevrolet Silverado k1500, 5.7L pick up. My
I have a 1992 Chevrolet Silverado k1500, 5.7L pick up. My heat gage will not go any higher than 140 degrees. I have changed the thermostat (180 degrees) and the engine was scanned at 180 degrees. I ha… read more
Peter Bagley
Peter Bagley
master technition
Vocational, Technical or Trade School
909 satisfied customers
2008 Chevy trail blazer when you hit the brake the pedal
2008 Chevy trail blazer when you hit the brake the pedal shakes like when the abs kicks in… read more
3pac2222
3pac2222
nissan master auto tech
Associate Degree
2 satisfied customers
GMC Terrain 2012 stalled and I had to get a tow. Onstar did
GMC Terrain 2012 stalled and I had to get a tow. Onstar did a diagnostic test and it gave this: P0010 - Intake (A) Camshaft Position Actuator Circuit / Open (bank 1) how much will it cost to get that … read more
Chris (aka - Moose)
Chris (aka - Moose)
Vocational, Technical or Trade Scho
108 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x