DCM DOOR control MOD problems
Thread Starter
Racer
Joined: Jun 2002
Posts: 384
Likes: 81
From: BC
DCM DOOR control MOD problems
This problem is on a 01 Z with 17k miles, always stored inside but I do live in the Northwest and the car is driven occasionally in the rain in the summer. Their has never been a problem with the door locks until now. I cannot lock the doors with the FOB or the inside cockpit control buttons but can unlock both doors . I presently hand lock the doors with the flip switches on the door and set the alarm with the FOB. When I push the FOB or the door button their is a click but the flippers do not move.
From the DIC the Codes are -Bat #1 and Bat #2 for for both DCM's and for the RDCM - loss of communication with the BCM.
The BCM shows no codes. but the RFA shows loss of communication with the BCM. They are all H codes. I have just installed a new battery as one of the diagnostic answers is the voltage. It had no effect.
I have the 3 Vol GM manuals for the 01 Vette but I would need a scan tool to figure out their diagnostic procedure. I went to a local GM dealer to discuss and he said they would put new door controllers in at a cost of 800 bucks but I am capable of taking the doors apart and doing that but am worried that its not the DCMs but some other component..
Thanks for any help or suggestions
Mike
From the DIC the Codes are -Bat #1 and Bat #2 for for both DCM's and for the RDCM - loss of communication with the BCM.
The BCM shows no codes. but the RFA shows loss of communication with the BCM. They are all H codes. I have just installed a new battery as one of the diagnostic answers is the voltage. It had no effect.
I have the 3 Vol GM manuals for the 01 Vette but I would need a scan tool to figure out their diagnostic procedure. I went to a local GM dealer to discuss and he said they would put new door controllers in at a cost of 800 bucks but I am capable of taking the doors apart and doing that but am worried that its not the DCMs but some other component..
Thanks for any help or suggestions
Mike
Pro
Joined: Mar 2008
Posts: 698
Likes: 20
From: Md
This problem is on a 01 Z with 17k miles, always stored inside but I do live in the Northwest and the car is driven occasionally in the rain in the summer. Their has never been a problem with the door locks until now. I cannot lock the doors with the FOB or the inside cockpit control buttons but can unlock both doors . I presently hand lock the doors with the flip switches on the door and set the alarm with the FOB. When I push the FOB or the door button their is a click but the flippers do not move.
From the DIC the Codes are -Bat #1 and Bat #2 for for both DCM's and for the RDCM - loss of communication with the BCM.
The BCM shows no codes. but the RFA shows loss of communication with the BCM. They are all H codes. I have just installed a new battery as one of the diagnostic answers is the voltage. It had no effect.
I have the 3 Vol GM manuals for the 01 Vette but I would need a scan tool to figure out their diagnostic procedure. I went to a local GM dealer to discuss and he said they would put new door controllers in at a cost of 800 bucks but I am capable of taking the doors apart and doing that but am worried that its not the DCMs but some other component..
Thanks for any help or suggestions
Mike
From the DIC the Codes are -Bat #1 and Bat #2 for for both DCM's and for the RDCM - loss of communication with the BCM.
The BCM shows no codes. but the RFA shows loss of communication with the BCM. They are all H codes. I have just installed a new battery as one of the diagnostic answers is the voltage. It had no effect.
I have the 3 Vol GM manuals for the 01 Vette but I would need a scan tool to figure out their diagnostic procedure. I went to a local GM dealer to discuss and he said they would put new door controllers in at a cost of 800 bucks but I am capable of taking the doors apart and doing that but am worried that its not the DCMs but some other component..
Thanks for any help or suggestions
Mike
Check the door harness connector (s) at / inside the accordian - the rubber boot from door to the body too. they are frequently loose.
RFA / BCM are recieving a signal if unlok works, right? GL!
Mark
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Disconnect the door power connector and see if the female pins are deformed and making a poor connection:
Fix any bent or deformed pins so that they make positive contact with the male pins. I have a spare male pin that I use to make sure that the female pins make good contact.
I have also seen fuses that are loose in the fuse holder. I break an old blown fuse in half and insert it into the fuse holder pins to make sure that there is good contact at the holder.
Use a meter to make sure that your getting proper voltage out of the fuse to the motor and DCM.
Bill
