Fault code 61: Diagnosis/troubleshooting

DIAGNOSIS/TROUBLESHOOTING (FAULT CODE 61)

Work instruction			Display OK	If not OK
1	Check coding	In menu item "Country coding", check whether the alarm system control module is correctly coded for the place of use	Step 2	Recode the alarm system control module (country coding) -> Ende
2	Check central locking switch	In the menu item "Input signals", select "Central locking system button" Actuate central locking system switch and check the statuses on the screen	Step 3	Step 5
3	Check leads between the alarm system control module and the door locks for short circuit to ground	Pull plugs A and B off the alarm system control module Pull plug off both door locks Measure resistance between plug A on alarm system control module pin 5 and ground Measure resistance between plug A on alarm system control module pin 28 and ground Measure resistance between plug A on alarm system control module pin 30 and ground Measure resistance between plug A on alarm system control module pin 32 and ground Measure resistance between plug B on alarm system control module pin 3 and ground	Step 4	Repair wiring harness -> End
4	Check leads between the alarm system control module and the door locks for open circuit	Measure resistance between plug A on alarm system control module pin 5 and pin 7 on plug of door lock on driver's side Measure resistance between plug A on alarm system control module pin 28 and pin 7 on plug of door lock on passenger's side Measure resistance between plug A on alarm system control module pin 30 and pin 3 on plug of door lock on driver's side Measure resistance between plug A on alarm system control module pin 32 and pin 3 on plug of door lock on passenger's side Measure resistance between plug B on alarm system control module pin 3 and pin 2 on plug of the driver's side and passenger's side door locks Measure resistance between plug B on alarm system control module pin 9 and ground	< 5 Step 5	Repair wiring harness -> End
5	Check micro switches of the two door locks (possible detection of faulty driver's/passenger's door lock)	Push plugs A and B back onto the alarm system control module Reconnect plugs to both door locks Close doors Vehicle not secured and not locked Select "Driver's side locked", "Passenger's side locked" "Driver's side secured" and "Passenger's side secured" in menu item "Input signals".	Driver's side not locked Passenger's side not locked Driver's side not secured (not applicable to USA vehicles) Passenger's side not secured (not applicable to USA vehicles) Step 12	Step 11
6	Check central locking switch	Remove central locking switch and pull plug off the switch Measure resistance between pins 4 and 1 on the central locking switch	Central locking switch actuated in "open" direction < 5 Central locking switch not actuated in "close" direction Step 6
7	Check central locking switch	Measure resistance between pins 4 and 2 on the central locking switch	Central locking switch actuated in "open" direction < 5 Central locking switch not actuated in "open" direction Step 7
8	Check the wire from the central locking switch to the control module for short circuit to ground	Pull plug off central locking switch Pull plug A off the alarm system control module Measure resistance between plug A on control module pin 29 and ground	Step 8
9	Check the wire from the central locking switch to the control module for open circuit	Measure resistance between plug A on control module pin 29 and plug on switch for central locking pin 1
10	Check the wire from the central locking switch to the control module for open circuit	Measure resistance between pins 1 and 2 of plug for central locking switch	approx. 180 at 20 °C Step 10
11	Check wire from fuse C 3 to central locking switch	Switch on ignition Measure voltage between plug on the central locking switch pin 4 and ground	> 11 V Step 12	Check fuse C 3 or repair wiring harness -> End
12	Depending on the test result of the input signals test in step 4, replace the driver's/passenger's door lock		-> End
13	Replace alarm system control module		-> End