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Jasper_db1

Fuel Door Actuator Replacement - Fuse?

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I just replaced the fuel door actuator on my 1999 C2 and the fuel door still does not lock and I get a single beep when locking the doors with a key (remote does not work).  Is there a fuse to the actuator?  I have a Durametric and reset the codes but they return when I run the activations.  Is there a fuse to the motor?  If not, where is the relay located?  I have the Bently manual and it only addresses how to R/R the motor, not troubleshoot it.

 

61
Central locking limit position Unlock not reached
Status: present 
Occurance Counter: 1
   
 58
Tank servo motor not energized despite relay activation
Status: not present 
Occurance Counter: 2
This fault is displayed for informational purposes, it is not an indication of a problem and no repair is needed.
   
 12
Wrong door lock module
Status: present 
Occurance Counter: 1
 
 

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You have two problems...

First check fuses.

 

61 is a door lock not actuating. Could be a bad microswitch.

12 relates to a door lock also.

 

58 No current in tank servomotor despite relay actuation

Possible cause of fault
- Short circuit to ground/open circuit in the wiring between the switching element for the filler flap and the alarm system control module
- Open circuit in wire between ground point 7 and alarm system control module
- Switching element for filler flap faulty
- Control module faulty

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I just installed a new (aftermarket) door latch into the left door (drivers) along with a new right door latch and the codes persist.  It seems that the 3rd party eBay door latches have a function that is not supported by the US spec cars, causing the Code 12 condition.

 

 Is there a way to pinpoint which door lock is causing the 61?  I see other posts referencing looking at live values but I only see that under the DME in Durametric and not in the Alarm I32 section.  

Edited by Jasper_db1

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After studying the Bently wiring diagram, I believe that the Fuel Door latch not working is possibly related to the frunk latch.  I've noticed that the light in there does not always turn on when opening the lid and this thread seems to tie the two together:

 

 

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Ran through test point 53 in FSM for code 58 and everything checks out.  I tested the resistance on the old and new actuator and they were both in the min-40's so I don't think the old one was bad at all.

 

I'm going to go through test point 56 for fault code 61 next week.

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