skywardbound172
Member
So I have the infamous door lock problem on a 00 MKIV Jetta, dome lights wont come on when door is open, headlight dinger doesn't sound the works. Read up on all the treads and found the issue with the solder or the micro switches in the module. So I identified two doors that wouldn't signal the dome light. The drivers door and the passenger rear door. The other doors trigger the domer when the switch is in the "doors" position.
Yesterday I replaced the door lock module for the drivers door, the passenger rear is in the mail still. For about 4 seconds the car recognized the drivers door was open, domer was on, key in the ignition dinger was going off and the headlight buzzer worked, even the door flood / mud light came on. So I put the whole thing together and when I closed and opened the door it didn't work. No recognition of door. So I took it all apart to check the connector, still connected, checked the wiring in the door jam, no cracks or broken wires. The power locks work, the manual lock / unlock functions normally including the unlock drivers only or unlock all 4 doors function. My key fob battery is dead so I haven't been able to check the remote lock function yet. I'm out of ideas. It's a brand new lock module. everything is plugged in and it even worked for half a minute.
Any ideas here I'm grasping and thin air trying to figure this one out. I'm starting to wonder if I don't have a bad comfort control module? Any one know if those are "keyd" specifically to the car. I'm seeing listings on ebay that have the ECM, CCM, ignition lock cylinder and door lock cylinder and new key fob all in one package. I have another MK4 that's not running that I can swap parts from that didn't have this door lock issue.
UPDATE: I swapped the door control module (the one with the window motor attached) from the drivers door of another MK4 I have and nothing has changed. All functionality is as previously stated. I also checked continuity between the pins on the door lock module and the dor control module for the micro switches and I check ground all the way through from the door lock module and the door control module through the door jam and down to the ground stud at the base of the A pillar.
UPDATE 2: I also checked the 30A and 15A fuse above the relay panel under the dash, Bentley says those are for central locking and comfort control module and they were fine. I also checked a verified 12v at the door lock control module by probing the pins with a meter. I didn't compare the powered wires to the manual though, just figured it had power so the door control module is working at least.
Thanks
Yesterday I replaced the door lock module for the drivers door, the passenger rear is in the mail still. For about 4 seconds the car recognized the drivers door was open, domer was on, key in the ignition dinger was going off and the headlight buzzer worked, even the door flood / mud light came on. So I put the whole thing together and when I closed and opened the door it didn't work. No recognition of door. So I took it all apart to check the connector, still connected, checked the wiring in the door jam, no cracks or broken wires. The power locks work, the manual lock / unlock functions normally including the unlock drivers only or unlock all 4 doors function. My key fob battery is dead so I haven't been able to check the remote lock function yet. I'm out of ideas. It's a brand new lock module. everything is plugged in and it even worked for half a minute.
Any ideas here I'm grasping and thin air trying to figure this one out. I'm starting to wonder if I don't have a bad comfort control module? Any one know if those are "keyd" specifically to the car. I'm seeing listings on ebay that have the ECM, CCM, ignition lock cylinder and door lock cylinder and new key fob all in one package. I have another MK4 that's not running that I can swap parts from that didn't have this door lock issue.
UPDATE: I swapped the door control module (the one with the window motor attached) from the drivers door of another MK4 I have and nothing has changed. All functionality is as previously stated. I also checked continuity between the pins on the door lock module and the dor control module for the micro switches and I check ground all the way through from the door lock module and the door control module through the door jam and down to the ground stud at the base of the A pillar.
UPDATE 2: I also checked the 30A and 15A fuse above the relay panel under the dash, Bentley says those are for central locking and comfort control module and they were fine. I also checked a verified 12v at the door lock control module by probing the pins with a meter. I didn't compare the powered wires to the manual though, just figured it had power so the door control module is working at least.
Thanks
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