Question about Cars & Trucks
How do I get a 1999 Blazer with an anti theft system to run after installing a new ignition.
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Posted on Jan 02, 2017
SOURCE: 1999 chevy blazer won't start
First of all make sure all your battery connections are Clean and Tight. If they are and all your dash lights come on and its not starting But its cranking over Your anti theft alarm may have gotten activated. You may have to leave your Key in the On position for 20 minutes to reset the alarm. Not cranking just in the on position, Now if its not Cranking and your hearing a clicking sound it may be your starter. I have sometimes tapped on the stater with a deadblow hammer and had someone crank it over Making sure your in park foot on brake and being EXTREMLY Carefull that you are not going to run someone over. If that don't get you going Get back to me we can do some more trouble shooting. Get that thing going for you. Thanks, Bear001
Posted on Jun 17, 2008
I Have A Seville 1990, When That Happen To Me I Got The Inginion
Replaced Problem Solved. What Is Happening Is Your Key Has A Chip And That Chip Is A Resister And When The Valve Is Not Sented To The Computer It Disengages the Fuel Pump And Than Tells You To Wait. Soon All That Will Happen Is You Will Get The Wait 3 Mins And It Will Never Start, A Good Locksmith Can Take Care Of This For You And That Will Save You Some Money. Cause If You Go To The Dealer Ouch They Will Hit You Up. But I Asure This Is How It Will Happen Cause It Is How It Happen To Me
And Sorry There Is No By Passing The Computer
Posted on Dec 25, 2008
Document ID# 803013
1999 Chevrolet Chevy K Silverado - 4WD
Security Lamp Illuminated on the IP, Engine Stalls, No Start, DTC B2960 (Security System Sensor Data Incorrect but Valid) Set (Inspect and Repair Cause of DTC B2960)
1999-2001 Chevrolet and GMC C/K Pickup and Utility Models (Silverado, Sierra, Tahoe, Suburban, Yukon, Yukon XL)
This bulletin is being revised to add information on inspecting for electrical intermittent conditions and important connector C201 tightening steps. Please discard Corporate Bulletin Number 01-08-56-002 (Section 08 -- Body and Accessories).
Some customers may comment on the following conditions. These symptoms may be intermittent.
• Security lamp illuminates while driving. The Security lamp may be On or Off when the customer brings the vehicle to the service facility.
• The engine cranks but will not start and the Security lamp is flashing.
• The engine starts then stalls and the Security lamp is flashing.
Condition(s) may be due to an incorrect Passlock™ sensor voltage received by the body control module (BCM) from the Passlock™ sensor due to the following conditions. Most intermittent conditions are caused by faulty electrical connections or wiring.
• A 7 ohm variation in the sensor ground circuit wiring, circuit 1057
• A 100 ohm variation in the Passlock™ sensor signal wiring circuit, circuit 1836
Inspect for the following items:
• Broken wiring inside the insulation.
• A poor connection between the male and female terminal at the connector. Refer to Testing for Proper Terminal Contact under Testing for Intermittent and Poor Connections in Wiring Systems for the specific procedure.
• A poor terminal to wire connection. Some conditions that fall under this description include poor crimps, poor solder joints, crimping over the wire insulation instead of the wire itself, and corrosion in the wire to terminal contact area.
• Wire insulation that is rubbed through. This causes an intermittent short as the bare area touches other wiring or parts of the vehicle.
• A poor connection between the male and female terminal at a connector. This poor connection may be the result of contamination or deformation.
- Contamination may be caused by the connector halves being improperly connected. A missing or damaged connector seal, damage to the connector itself, or exposing the terminals to moisture and dirt can also cause contamination. Contamination, usually in the underhood or underbody connectors, leads to terminal corrosion, causing an open circuit or intermittently open circuit.
• Separate the connector halves.
• Visually inspect the connector halves for contamination. Contamination may result in a white or green build-up within the connector body or between terminals. This causes high terminal resistance, intermittent contact, or an open circuit. An underhood or underbody connector that shows signs of contamination should be replaced in its entirety including the terminals, the seals, and the connector body.
- Deformation is caused by probing the mating side of a connector terminal without the proper adapter, improperly joining the connector halves, or repeatedly separating and joining the connector halves. Deformation, usually to the female terminal connector tang, can result in poor terminal contact causing an open or intermittently open circuit. Using an equivalent male terminal from the J 38125-B, test that the retention force is significantly different between an good terminal and a suspect terminal. Replace the female terminal in question.
Have any of the following components had service recently?
• The BCM
• The ignition lock cylinder case assembly
• The PCM/VCM
If any of the above components have been replaced, the Programming Theft Deterrent System Components procedure must be performed before any diagnostic procedures are performed.
To assist in diagnosis, the following steps are provided.
Does the engine start? If not, use the Engine Cranks but Does Not Run diagnostic information in the Engine Controls sub-section of the applicable Service Manual.
• The Security telltale on the message center is controlled by the vehicle theft deterrent (VTD) system and the content theft deterrent (CTD) system. The Security telltale is controlled by the BCM through the Class 2 data line.
• The VTD system portion of the BCM controls the Security telltale when the ignition switch is in the On position. The VTD system uses the Security telltale as a malfunction indicator.
• The CTD system portion of the BCM controls the Security telltale when the ignition switch is in the Off position. The CTD system uses the Security telltale to identify system status.
Observe the Security indicator lamp in the instrument panel.
Remove the key from the lock cylinder.
- Security indicator should be Flashing when the door is open.
- Security indicator should be Off when all the doors are closed.
- If the Security indicator does not come On or go Off correctly, refer to the Content Theft Deterrent System diagnostic and repair information in the applicable Service Manual.
With the Doors closed, place the key in the lock cylinder and turn to the Run position. Observe the Security indicator lamp.
- Lamp is On and does not go Off however, the engine starts. This indicates that the VTD system detected a fault when the engine was running.
- Lamp flashes On and Off. This indicates a problem has been detected by the VTD (Passlock™) system and the engine may not start this key cycle, a current condition.
Important: You must diagnose the diagnostic trouble codes (DTCs) in the order specified in the DTC table shown below. Failure to do so may result in one or more of the following conditions:
• Extended diagnostic time
• Incorrect diagnosis
• Incorrect parts replacement
Important: Before you use this table, diagnose P0601, P0602, P0604, and P0606. Refer to Diagnostic System Check - Theft Deterrent.
PXXXX Other PCM DTCs
Refer to the following procedures:
• Diagnostic System Check - Engine Controls in Engine Controls - 4.3L
• Diagnostic System Check - Engine Controls in Engine Controls - 4.8L, 5.3L, 6.0
• DTC P0192 in Engine Controls - 6.6L
• Diagnostic System Check - Engine Controls in Engine Controls - 8.1L
If none of the above items are true, proceed with the following steps:
Install seat covers.
Connect the scan tool to the diagnostic link connector (DLC).
Enter scan tool diagnostics.
Select the model year of the vehicle.
Select light truck.
Select F1, (Body).
Select "C" or "K" for Series.
Select F0, Body Control Module.
Select F0, (Diagnostic Trouble Codes (DTC)).
Select F0, (DTC information).
Select F0, (Current DTC).
Record on the repair order any current DTCs displayed. If none, skip the next step.
Is a current B2960 DTC displayed? If no, the condition is not present with this key cycle. Continue to the next step.
Select F1, (History DTC).
Are any history DTCs other than B2960 present? If so, diagnose those DTCs first using the appropriate service information, otherwise continue.
Select F1, Data Display.
Select F6, Security.
Cycle the key to the OFF position and wait 20 seconds.
Slowly turn the key to the RUN position. Be careful not to turn the key into the START position.
Observe the following values:
- Passlock™ Data Voltage should be 5.0 volts.
- Passlock™ State should be Normal.
- Passlock™ Code should be Open.
Rotate the key to the START position, and observe the following again:
- Passlock™ Data Voltage should be less than 5.0 volts. Passlock™ Data Voltage should remain steady and not fluctuate. The test vehicle used for this diagnostic procedure had a voltage value of 2.49 volts. The vehicle being worked on may be either higher or lower than this value. The key is that it has to be less than 5.0 volts.
- Passlock™ State should be "Monitor Passlock™".
- Passlock™ Code should be Valid Code.
If no trouble is found and the customer has experienced one of the symptoms or the code is a history DTC, the most likely cause is the VTD (Passlock™) wiring, specifically the wires from the VTD (Passlock™) sensor to the BCM.
Posted on May 14, 2010
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