Question about 1997 Chevrolet Blazer

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1996 chevy blazer air bag code 42 low volt sense

What are possible causes

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    2001 f450 7.3 air bag code b1921 possible causes

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Defective steering column clock spring rotating contact or battery was disconnected or changed and airbag diagnostic module not reset.

Posted on Dec 31, 2008

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2000 CHEVY IMPALA AIR BAG LIGHT ON


  • B0041
CIRCUIT DESCRIPTION
The inflatable restraint side impact module-LF deployment loop consists of the inflatable restraint side impact module-LF, the inflatable restraint side impact module wiring harness, and the side impact module-LF high and low circuits. A shorting bar used within the side impact module-LF connector shorts together the side impact module-LF high and low circuits when the connector is disconnected. This helps to prevent unwanted deployment of the inflator module during servicing. During a side or frontal crash of sufficient force the inflatable restraint Sensing and Diagnostic Module (SDM) allows current to flow through the deployment loop in order to deploy the side impact module-LF. When the ignition is turned ON, the SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a Diagnostic Trouble Code (DTC) will be stored in memory.

CONDITIONS FOR RUNNING THE DTC
Ignition 1 voltage is within the normal operating voltage range.

CONDITIONS FOR SETTING THE DTC
  • DTC B0040 will set when the side impact module-LF deployment loop resistance is less than 1.3 ohms for 500 milliseconds .
  • DTC B0041 will set when one of the following conditions occurs:
  • Side impact module-LF high circuit is less than 2.4 volts and the side impact module-LF deployment loop is more than 6 ohms for 500 milliseconds .
  • Side impact module-LF deployment loop resistance is more than 4.8 ohms for 500 milliseconds .
  • DTC B0045 will set when one of the following conditions occur:
  • Side impact module-LF high and/or low circuits is short to ground or short to voltage for 500 milliseconds .
  • Side impact module-LF high circuit is less than 2.4 volts and side impact module-LF deployment loop resistance is less than 6 ohms for 500 milliseconds .
ACTION TAKEN WHEN THE DTC SETS
The SDM commands the AIR BAG indicator ON via Class 2 serial data.

CONDITIONS FOR CLEARING THE DTC
  • The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
  • A history DTC will clear once 255 malfunction free ignition cycles have occurred.
DIAGNOSTIC AIDS
The following are possible causes of the malfunction:
  • A short between the side impact module-LF high and low circuits
  • An open or a high resistance in the side impact module-LF high or low circuits
  • A short to ground or a short to voltage in the side impact module-LF high or low circuits
  • The side impact module-LF connector
  • The SDM connector
  • A malfunctioning side impact module-LF
  • A malfunctioning SDM

Jan 29, 2013 | 2000 Chevrolet Impala

1 Answer

My 1996 Chevy Blazer blower isn't blowing air. Fuse is ok. What next?


Faulty blower motor resistor or blower motor resistor connector faulty.Wiggle blower motor resistor connector with the ignition and fan switches on.

Jun 17, 2012 | 1996 Chevrolet Blazer

1 Answer

My 96 blazer was running fine then battery light came on and abs light and air bag lights came on and then engine started missing.


Blazers aren't necessarily known for bad ignition switches (which it sounds like), but I would suggest a battery problem ( known more for this). Check the battery connections, especially the positive post. Make sure the connections are tight and no corrosion. If the battery checks out good then I'd suspect the ignition switch failing. The ABS and AIR BAG lights will come on when the battery gets low.

Apr 11, 2011 | 1996 Chevrolet Blazer

2 Answers

Air bag needs reset in 1998 chevy blazer ls. air bag comes on and goes off while driving down the road.


Chances are it's the airbag clockspring mechanism behind the horn in the steering wheel, they wear out and cause the light to flash. There is no reset for the light. If it's on, you have a short or a bad connection. The clockspring is available at most auto parts stores and installs with a few screws. Make sure you disconnect the battery before you do anything related to the airbag because you don't want it to go off while you are working on it.

Apr 08, 2010 | 1998 Chevrolet Blazer

1 Answer

Codes on my 2001 Blazer are Po452 and Po651 What do I look for?


CODE PO452 FUEL TANK PRESSURE SENSOR CIRCUIT LOW INPUT CONDITIONS.YOUR FTP OR FUEL TANK PRESSURE SENSOR FAILED. PO651 5 VOLT REFERENCE 2 CIRCUIT MALFUNCTION CONDITIONS.POSSIBLE CAUSE 5 VOLT REF.CIRCUIT IS SHORTED TO CHASSIS OR SENSOR GROUND.OR 5 VOLT REF CIRCUIT TO MAP OR TP SENSORS CIRCUIT IS SHORTED TO B+.ALSO YOUR PCM HAS FAILED.YOU PROBABLY NEED TO TAKE IT TO DEALERSHIP.THEY HAVE DIAGNOSTIC EQUIPMENT TO CHECK SENSORS AND PCM FAILURE.

Nov 10, 2009 | 2001 Chevrolet Blazer

1 Answer

Chevy Blazer 4 x 4 and Engine Light Problems


To your problem with the air bag, I was driving an 07 GMC Sierra 1500 that was doing the same thing. Next thing the charges went on the seat belt tensioners, luckily I was parked because the belts gave me a pretty violent **** back. Turns out the SDM was corroded and caused the action, and there was no reason the air bags didn't deploy as well other than pure luck. I would say get it checked by GM, you don't want to mess around with safety systems. You can visually inspect the integrity of the SDM, it's located under the driver's seat, unfortunately I think the seat has to be removed to see it. Mine had a calcium like build up all over the external casing.

Jul 14, 2009 | 1996 Chevrolet Blazer

1 Answer

Have a 1997 chevy blazer with the air bag light stuck om. Get a B1042 code reading saying low voltage low loop circle do you think clockspring or arming sensor? I get many suggestions please help!! Thank...


You will have to take this to a dealer to shut the air bag light off .. Unless it has been in a wreck at one time or another .. if it has it needs the sensor on front end replaced and the module also reset or replaced.. thanks Jerry and holler if you need more.

Apr 23, 2009 | 1997 Chevrolet Blazer

1 Answer

My battery went flat the other week! now the airbag light wont go out!! annoying!!! please help!!


suspect the air bag light came on due to it sensing a low battery voltage which woud cause the air bag to not deploy. Check to see if your battery is carging first. It should read 12 volts with engine off. it should read 14 -15 volts with engine running.
Next check for a dead cell in battery. Need to have any auto store test it for free.
If all good, check for battery drain from something still on after key is off.

Mar 11, 2009 | 1993 BMW 3 Series

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