Could not lock doors with door switch. Found a temporary fix is to reset the BCM by removing and replacing the IOD fuse. This worked a few times, now the "fix" is only good for maybe one lock/unlock cycle. After checking the signals that go into and come from the BCM, this looks too serious to just let it be and use the locks manually.
From past electronic repairs, my money is on electrolytic capacitors in the BCM. The repair of the module should cost under $10.00. Due to the amount of time to remove the BCM, the only viable choice is to take it to the dealer and pay their rates to replace the BCM and reflash it. This problem is discussed in many places on the web. The dealer makes out that this is a new problem to them. The door switches send a signal to the BCM to unlock the doors. My BCM is not acting on this signal. The BCM also controls the dash light levels and the exterior lights. This is still working. I do not need for the brake lights to quit because some engineer thought it was a good idea to control them through a computer. Computers have their place, but, it is NOT here.
Whoever dreamed up this complex control circuit needs to go back to school where they teach KISS. Complex controls have no place in an automotive environment. The simpler the control is the more reliable it is. Press the brake pedal and the brake lights come on, no computer. Turn on the lights and they come on, do not go through a resistive network where the resistance determines what lights the computer is to turn on. Close the door lock switch and energize a relay to operate all of the door locks. Detect car speed and energize the lock relay to lock the doors if you want. Does not require a computer. No sane person would use a computer for these controls in an automotive environment.
A D V E R T I S E M E N T S
Could not lock doors with door switch. Found a temporary fix is to reset the BCM by removing and replacing the IOD fuse. This worked a few times, now the "fix" is only good for maybe one lock/unlock cycle. After checking the signals that go into and come from the BCM, this looks too serious to just let it be and use the locks manually.
From past electronic repairs, my money is on electrolytic capacitors in the BCM. The repair of the module should cost under $10.00. Due to the amount of time to remove the BCM, the only viable choice is to take it to the dealer and pay their rates to replace the BCM and reflash it. This problem is discussed in many places on the web. The dealer makes out that this is a new problem to them. The door switches send a signal to the BCM to unlock the doors. My BCM is not acting on this signal. The BCM also controls the dash light levels and the exterior lights. This is still working. I do not need for the brake lights to quit because some engineer thought it was a good idea to control them through a computer. Computers have their place, but, it is NOT here.
Whoever dreamed up this complex control circuit needs to go back to school where they teach KISS. Complex controls have no place in an automotive environment. The simpler the control is the more reliable it is. Press the brake pedal and the brake lights come on, no computer. Turn on the lights and they come on, do not go through a resistive network where the resistance determines what lights the computer is to turn on. Close the door lock switch and energize a relay to operate all of the door locks. Detect car speed and energize the lock relay to lock the doors if you want. Does not require a computer. No sane person would use a computer for these controls in an automotive environment.
- Glenn L., Goose Creek, US