Diagnosis/troubleshooting for vehicles with manual transmission

NOTE: Before troubleshooting, read out the fault memory of the DME and the instrument cluster and, if necessary, remedy faults!

DIAGNOSIS TROUBLESHOOTING - FAULT CODE 5520, AS OF MY 2002 (MANUAL TRANSMISSION)

Work instruction			Display OK	If not OK
1	Visual inspection	Visual inspection of all plug contacts and leads	Step 2	Repair wiring harness -> End
2	Check control units	Ignition off Disconnect plug from DME control module D and instrument cluster A Ignition on Erase fault memory Update and read out fault memory	No display Fault code 5520 Step 6	Display Fault code 5520 present Step 3
3	Check CAN drive between ABS control unit, DME control module and instrument cluster for short circuit to B+	Ignition off Pull plug off the ABS control unit Ignition on Measure voltage between ABS control unit plug pin 24 and ground Measure voltage between ABS control unit plug pin 40 and ground	< 0.3 V Step 4	Short circuit to B+ Repair CAN wiring harness -> End
4	Check CAN drive between ABS control unit, DME control module and instrument cluster for short circuit to ground	Ignition off Measure resistance between ABS control unit plug pin 24 and ground Measure resistance between ABS control unit plug pin 40 and ground	Step 5	Short circuit to ground Repair CAN wiring harness -> End
5	Check CAN drive for short circuit with respect to each other	Ignition off Measure resistance between ABS control unit plug pin 24 and pin 40	Step 8	Short circuit with respect to each other Repair CAN wiring harness -> End
6	Check CAN drive between ABS control unit and DME control module for open circuit or incorrect allocation	Ignition off Measure resistance between ABS control unit plug pin 24 and DME control module plug D pin 36 (CAN drive high) Measure resistance between ABS control unit plug pin 40 and DME control module plug D pin 37 (CAN drive low)	< 5 Step 7	Repair open circuit in CAN wiring harness -> End
7	Check CAN drive between ABS control unit and instrument cluster for open circuit or incorrect allocation	Ignition off Measure resistance between ABS control unit plug pin 24 and instrument cluster plug A pin 15 (CAN drive high) Measure resistance between ABS control unit plug pin 40 and instrument cluster plug A pin 31 (CAN drive low)	< 5 Step 8	Repair open circuit in CAN wiring harness -> End
8	Check DME control module	Ignition off Connect plug to ABS control unit Connect plug D to DME control module Ignition on Erase fault memory Update and read out fault memory	No display Fault code 5520 Step 9	Display Fault code 5520 present Step 11 and also continue test at Step 9
9	Check instrument cluster	Ignition off Connect plug D to DME control module Connect plug A to instrument cluster Ignition on Erase fault memory Update and read out fault memory	No display Fault code 5520 Step 10	Display Fault code 5520 present Step 15
10	Replace ABS control unit		-> End
11	Replace DME control module		-> End
12	Replace instrument cluster		-> End