contact us
SRS control
body electronics
PCM control
car diagnostic
instrumentation
other electronics
 
  phone:
  (905) 673-0090
   
  fax:
  (905) 673-6912
   
  2311 Anson Dr.,
Unit B
Mississauga,
Ontario
L5S 1G1,
Canada







Chrysler
Intrepid
300m
LHS

General Motors
Buick

BMW
3 series

Mercedes
E-class
C-class

more...




The BCM controls virtually EVERY electrical function
on the vehicle and problems within the BCM (or its associated fuse box)
will cause mis-operation of vehicle electrical functions. When diagnosing electrical problems on vehicles fitted with BCM, it is vital to appreciate the relationship between the BCM and its associated electrical fuse box.

BODY CONTROL MODULE FAIL SYMPTOMS

  • Specific BCM fault symptoms include mis-operation of headlights, door locks, electric windows, fuel filler flap, indicators, sun roof . These faults may be intermittent.
  • Erroneous fuse failure codes are also symptoms of BCM failure (if fusebox has been changed).
  • Intermittent engine non-crank can a BCM failure symptom (if security system faults are eliminated).
  • The customer may experience a condition where the vehicle horn may chirp momentarily upon attempting vehicle entry. This condition may be intermittent and most likely will occur when the customer is attempting to unlock the vehicle using either the door key or the remote keyless entry (RKE) FOB.

We offer an excellent repair and reliability rebuild service for defective BCMs (Rebuilding is essential to maintaining reliability in the long term). This service has to be on an own unit rebuild basis because vehicle identity and security functions are programmed into the BCM during pre-sales dealer preparation. Rebuilding your own unit avoids programming costs! (This is a hidden cost when you fit a new BCM).

Components within the BCM are CMOS technology which are extremely vulnerable to ESD (Electro Static Discharge) damage. Merely opening the BCM can cause multiple component failures and result in the BCM becoming unrepairable. Please, please resist the temptation to remove cover and poke around inside - it could cost you a new BCM.
   

CAUTION!

Odometer mileage readings in some models are electronically stored in 2 locations on the vehicle - the instrument cluster and the BCM. System programming ensures that in the event of any mismatch between the 2 locations, the odometer will permanently display the highest mileage!!!
Danmax Merely switching on the ignition with another BCM (with higher recorded mileage) connected can cause the odometer to permanently display the higher mileage. The system CANNOT be changed back to the lower recorded mileage by reversing this procedure.

BCMs are also matched to door lock codes. Please ensure (with dealer) lock set bar and EKA codes are written down before parting with your BCM for exchange. If you can't establish these codes, be ready to spend hundreds dollars on a new lock set if you change the BCM.

CLIMATE CONTROL UNIT FAIL SYMPTOMS

  • Climate Control unit digital display is dim, dark or intermittent. Controls function OK.
  • Climate Control unit digital display is dark. Controls do not work. May work when cold.
  • Dark Display or does opposite of what it should - causes Heat when its warm outside and cool when its cold outside.
  • Electronic Climate Control dim, intermittent or non-functional.
  • Heater or airconditioner doesn't respond
  • The display readout is dead
  • The display is intermittent
  • Heater is stuck on high
  • Fan is stuck on high
  • The outside temperature reading displayed in the overhead console can, in certain low speed driving situations, display an incorrect value