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Fault code 5527: Diagnosis/troubleshooting

DIAGNOSIS/TROUBLESHOOTING CHART - FAULT CODE 5527

Work instruction Display OK If not OK
1 Check CAN bus between DME control module and Tiptronic control module for short circuit to voltage
  1. Switch off ignition
  2. Pull off DME control module plug and Tiptronic control module plug
  3. Switch on ignition
  4. Measure voltage between Tiptronic control module plug pin L and ground
 < 0.3 V
Step 2		 Short circuit to voltage in the CAN wiring harness between Tiptronic control module plug pin L and DME control module plug pin B3
-> End
2 Check CAN bus between DME control module and Tiptronic control module for short circuit to voltage
  1. Measure voltage between Tiptronic control module plug pin H and ground
 < 0.3 V
Step 3		 Short circuit to voltage in the CAN wiring harness between Tiptronic control module plug pin H and DME control module plug pin B4
-> End
3 Check CAN bus between DME control module and Tiptronic control module for short circuit to ground
  1. Switch off ignition
  2. Measure resistance between Tiptronic control module plug pin H and ground
 Step 4 Short circuit to ground in the CAN wiring harness between Tiptronic control module plug pin H and DME control module plug pin B4
4 Check CAN bus between DME control module and Tiptronic control module for short circuit to ground
  1. Measure resistance between Tiptronic control module plug pin L and ground
 Step 5 Short circuit to ground in the CAN wiring harness between Tiptronic control module plug pin L and DME control module plug pin B3
5 Check CAN bus between DME control module and Tiptronic control module for short circuit
  1. Measure resistance between Tiptronic control module plug pin H and pin L
 Step 6 Short circuit in the CAN wiring harness between Tiptronic control module plug pin H and pin L and DME control module plug pin B3 and B4 -> End
6 Check CAN bus between DME control module, instrument cluster, PSM control module and PSM steering-angle sensor for short circuit to voltage
  1. Pull off the following plugs: PSM control module plug, PSM steering-angle sensor plug and instrument cluster control module plug
  2. Switch on ignition
  3. Measure voltage between DME control module plug pin D36 and ground
 < 0.3 V
Step 7		 Short circuit to voltage in CAN wiring harness between DME control module plug pin D36, instrument cluster plug pin A15, PSM control module plug pin A24 and PSM steering-angle plug pin A2
-> End
7 Check CAN bus between DME control module, instrument cluster, PSM control module and PSM steering-angle sensor for short circuit to voltage
  1. Measure voltage between DME control module plug pin D37 and ground
 < 0.3 V
Step 8		 Short circuit to voltage in CAN wiring harness between DME control module plug pin D37, instrument cluster plug pin A31, PSM control module plug pin A40 and PSM steering-angle plug pin A1
-> End
8 Check CAN bus between DME control module, instrument cluster, PSM control module and PSM steering-angle sensor for short circuit to ground
  1. Switch off ignition
  2. Measure resistance between DME control module plug pin D37 and ground
 Step 9 Short circuit to ground in CAN wiring harness between DME control module plug pin D37, instrument cluster plug pin A31, PSM control module plug pin A40 and PSM steering-angle plug pin A1
-> End
9 Check CAN bus between DME control module, instrument cluster, PSM control module and PSM steering-angle sensor for short circuit to ground
  1. Measure resistance between DME control module plug pin D36 and ground
 Step 10 Short circuit to ground in CAN wiring harness between DME control module plug pin D36, instrument cluster plug pin A15, PSM control module plug pin A24 and PSM steering-angle plug pin A2
-> End
10 Check CAN bus between DME control module, instrument cluster, PSM control module and PSM steering-angle sensor for short circuit
  1. Measure resistance between DME control module plug pin D36 and DME control module plug pin D37
 Step 11 Short circuit in CAN wiring harness
-> End
11 Check CAN bus between DME contol unit and PSM control unit for open circuit
  1. Measure resistance between DME control module plug pin D36 and PSM control module plug pin 24
 < 5
Step 12		 Open circuit in CAN wiring harness to the PSM control module
-> End
12 Check CAN bus between DME contol unit and PSM control unit for open circuit
  1. Measure resistance between DME control module plug pin D37 and PSM control module plug pin 40
 < 5
Step 13		 Open circuit in CAN wiring harness to the PSM control module
-> End
13 Check control units
  1. Push on all control module plugs
  2. Disconnect the control modules one after the other and check whether the "CAN data bus (drive)" fault has been remedied
 Replace the last control module to be disconnected
-> End
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