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These are A.U0140 is bcm / body conto module is unable to communicate with the ECM/PCM AND B. U0155 IS controller area communication network they are related to each other and you must find the + network wire and the - network wire for pcm/ecm to bcm and from bcm to the dash either wire could be broken or corroded or the + is shorted to ground OR the opposite the - is shorted to the + //it's very rare for a module failure here check the fuses for can network/DATA LINK CONNECTOR /// a scan tool will not work because the communication network is broken and lights won't come on or shut of because there's no signal to the lighting control module //LCM YOU MUST FIND THE POSITIVE + CAN BUS WIRE AND THE NEGATIVE- FOR YOUR TRUCK USE A CONTINUITY TESTER WITH JUMPER WIRES HOME MADE TO BE LONG ENOUGH TO SEARCH FROM MODULE TO MODULE YOU CAN USE SPEAKER WIRE FOR JUMPERS AND ANY KIND OF PROBE OR SOLDERED WIRE TIP TO INSERT INTO PLUGS ///////DO NOT CUT INSULATION ON THE WIRES IT CAUSES THE WIRES TO CORRODE WHEN AIR CONTACTS THE COPPER WHICH MIGHT ALREADY BE WHAT'S WRONG HERE WHEN YOU FIND WHICH IT IS YOU MUST SEAL THE WIRE WITH HEAT SHRINK TO KEEP OXYGEN AWAY FROM THE COPPER OK PLEASE STAY CALM AND WRITE DOWN EVERYTHING AS YOU GO ALONG SECTION BY SECTION OTHERWISE THIS WILL DRIVE YOU CRAZY FROM TIGHT SPOTS AND FORGETTING FROM THE AGGRAVATING SITUATION THIS IS HARD TO DO IF YOUR A BIG GUY TRY TO GET OR LOOK AT A BOOK FOR YOUR TRUCK TO GET THE WIRE COLORS AND WHICH IS +/- THEN SEARCH AT THE + /- FOR EACH SECTION FOR CONTINUITY TO EACH ONE FIRST THE CHECK A + WIRE AND A - WIRE IN THE SAME SECTION TO SEE IF ONE IS SHORTED TO THE OTHER LIKE THIS +/+THEN -/- THEN +/- AND -/+ I'M TELLING YOU THIS BECAUSE I DON'T KNOW HOW MUCH YOU KNOW ABOUT THIS OK WHEN I SAY +/- I ALSO MEAN TO THE BODY GROUND BECAUSE THE CONNECTIONS COULD BE CORRODED OR BROKEN IN THE WIRE SO 1 WIRE FROM CONNECTOR END TO END EACH AND THEN + TO - WIRE IN THAT SECTION THEN +TO THE BODY GROUND AND TO THE NEGATIVE WIRE TO ANY + ITS NEAR AND INSPECT THEM FOR BREAKS IN THE INSULATION THAT WILL BRING YOU TO THE SOLUTION FASTER IF ONLY 1 IS TO BLAME AND BELIEVE ME THE LAST TIME THIS TWISTED MY SQUIRRELS NUTS AND I DON'T OWN ONE CHEER UP YOU WILL FIND IT ALSO CHECK THE PLUGS FOR BROKEN PIECES YOU CAN REMOVE THE ENDS AND JOIN THEM TOGETHER TEMPORARILY TILL YOU CAN GET THE PLUG FROM A JUNKYARD GOOD LUCK STEPHEN
Do you know what U code's Are ? Do you have service info. ? Any module on the vehicle can cause a no start , GMLAN Hi & Lo . 2016 Traverse No start GM Lan A sensor that is on the 5 volt ref. circuit could bring down the Data bus . Your best bet , take your vehicle to a guy like in the video . Before you repalce parts you don't need , plus the BCM would need to be programmed . Anti-theft system - key's would need to be programmed too.
HDM module ??????? No such module .
DTC U0100 00: Lost Communication With Engine/Powertrain Control Module (ECM/PCM)
DTC U0101 00: Lost Communication With Transmission Control Module (TCM)
DTC U0121 00: Lost Communication With Electronic Brake Control Module (EBCM)
DTC U0140 00: Lost Communication With Body Control Module (BCM)
DTC U0151 00: Lost Communication With Restraints Control Module
DTC U0155 00: Lost Communication With Instrument Panel Cluster (IPC) Control Module
DTC U0164 00: Lost Communication With HVAC Control Module
DTC U0168 00: Lost Communication With Vehicle Theft Deterrent (VTD) Control Module
DTC U0170 00: Lost Communication With Passenger Presence System (PPS)
DTC U0184 00: Lost Communication With Radio
DTC U0186 00: Lost Communication With Audio Amplifier
DTC U0194 00: Lost Communication With Digital Radio Receiver (DRR)
DTC U0198 00: Lost Communication With Communication Interface Module (OnStar®)
DTC U0209 00: Lost Communication With Heated Seat Module (HSM)
DTC U0214 00: Lost Communication With Remote Function Actuation (RFA)
These are all the modules onyour vehicle - no hdm module .
... V6 > Electrical > Body Control Module (BCM). 1999 CHEVROLET BLAZER 4.3L V6 : Electrical : Body Control Module (BCM), Price, Core, Total, Add to Cart ...
... V6 > Electrical > Body Control Module (BCM). 1999 CHEVROLET BLAZER 4.3L V6 : Electrical : Body Control Module (BCM), Price, Core, Total, Add to Cart ...
This generic "U" trouble code applies to all car makers and indicates
a problem between the PCM and the body control module. This is likely
the result of a problem in the data link between the two modules.
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