Chevrolet Equinox manuals

Chevrolet Equinox Service Manual: #PIT5236: Diagnostic Tip: OnStar Module Does Not Support All B101D Symptom Codes - (Oct 3, 2013)

Chevrolet Equinox Service Manual / Accessories / Navigation and Telematics / #PIT5236: Diagnostic Tip: OnStar Module Does Not Support All B101D Symptom Codes - (Oct 3, 2013)

Subject:Diagnostic Tip: OnStar Module Does Not Support All B101D Symptom Codes

#PIT5236: Diagnostic Tip: OnStar Module Does Not Support All B101D Symptom Codes - (Oct 3, 2013)

Models: 2011 - 2014 All GM Passenger Car and Light Duty Trucks with RPO UE1
(Except 2011-2013 Chevrolet Corvette, 2011-2012 Chevrolet Colorado, 2011-2012 GMCCanyon)

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) describedin this PI.

Condition/Concern

Some customers may complain of various concerns, such as OnStar is inoperative and/orthat the red LED is illuminated. Upon inspection, DTC B101D will be stored in theOnStar module.  In some cases, a symptom code may be stored as well but the technicianmay find that the SI diagnosis does not list the symptom code.   At this time, theSI diagnosis for B101D only contains generic information that is used to diagnosethis DTC in variousmodules. As a result, the symptom code stored in the OnStar module may not match thoselisted in the SI diagnosis, the symptom code may not be listed in the SI diagnosis,or the SI diagnosis may not list any symptom codes at all.

Recommendation/Instructions

If this concern is experienced, the suggestions below and DTC reference table mayhelp:

If DTC-B101D is set as current in the OnStar module without any symptom codes, followSI diagnosis and repair as directed.

If DTC B101D 39, B101D 3C, or B101D F0 are stored in history, contact GM TAC withthe customer concern, this PI number, and information from the latest version of bulletin03-08-46-004. DO NOT clear the DTCs at any point as the information in the modulemay be needed for root cause analysis.

If DTC B101D 37 is stored in history, please refer to the latest version of PIC5492for suggestions.

Symptom Codes Currently Supported by OnStar Module

DTC and Symptom Code

Description

B101D  00

Electronic Control Unit Hardware Malfunction (Only Supported on 2011 Chevrolet HHRand 2011 & 2012 Malibu)

B101D  31

Electronic Control Unit Hardware Internal Checksum Error

B101D  32

Electronic Control Unit Hardware General Memory Malfunction

B101D  37

Electronic Control Unit Hardware Software Malfunction (Only Sets in History)

B101D  38

Electronic Control Unit Hardware Supervision Software Malfunction

B101D  39

Electronic Control Unit Hardware Internal Communication Malfunction (Bluetooth)

B101D  3C

Electronic Control Unit Hardware Internal Communication Malfunction (GPS)

B101D  F0

Electronic Control Unit Hardware Internal Communication Malfunction (Phone)

Please follow this diagnostic or repair process thoroughly and complete each step.If the condition exhibited is resolved without completing every step, the remainingsteps do not need to be performed.

GM bulletins are intended for use by professional technicians,NOT a "do-it-yourselfer".  They are written to inform thesetechnicians of conditions that may occur on some vehicles, or toprovide information that could assist in the proper service of avehicle.  Properly trained technicians have the equipment,tools, safety instructions, and know-how to do a job properly andsafely.  If a condition is described, DO NOT assume that thebulletin applies to your vehicle, or that your vehicle will havethat condition.  See your GM dealer for information on whetheryour vehicle may benefit from the information.

#PIT5236: Diagnostic Tip: OnStar Module Does Not Support All B101D Symptom Codes - (Oct 3, 2013)

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