Fault code 59: Diagnosis/troubleshooting

DIAGNOSIS/TROUBLESHOOTING (FAULT CODE 59)

Work instruction			Display OK	If not OK
1	Check fuse C3	Pull off and check fuse C3	Fuse C3 OK Step 2	Replace fuse C3 -> End
2	Check the wire from ground point 7 to the alarm system control module for open circuit	Switch off ignition Pull plugs A and B off the alarm system control module Measure resistance between plug B on alarm system control module pin 1 and ground	< 5 Step 3	Repair wiring harness -> End
3	Check leads from the alarm system control module to the servomotors for short circuit to ground	Pull plugs off both door locks Measure resistance between plug B on alarm system control module pin 9 and ground	Step 4	Repair wiring harness -> End
4	Check leads from the alarm system control module to the servomotors for open circuit	Measure resistance between plug B on alarm system control module pin 9 and pin 2 on plug of door lock (driver's side/passenger's side)	< 5 Step 5	Repair wiring harness -> End
5	Check leads from the alarm system control module to the servomotors for short circuit to ground	Measure resistance between plug A on alarm system control module pin 19 and ground	Step 6	Repair wiring harness -> End
6	Check leads from the alarm system control module to the servomotors for open circuit	Measure resistance between plug A on alarm system control module pin 19 and pin 9 on plug of door lock (driver's side/passenger's side)	< 5 Step 7	Repair wiring harness -> End
7	Check leads from the alarm system control module to the door locks for short circuit to ground	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	Step 8	Repair wiring harness -> End
8	Check leads from the alarm system control module to 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	< 5 Step 9	Repair wiring harness -> End
9	Check output signals of the control module	Connect special tools 9616 and 9617 to the alarm system control module Reconnect plugs to both door locks Switch on ignition Select "Secure doors" in menu item "Drive links" Carry out a drive link test and simultaneously measure the voltage on special tool 9616, pin 19 and ground	A voltage pulse can be measured with the digital multimeter Step 10	Step 11
10	Replace door lock		-> End
11	Replace alarm system control module		-> End