ECWW, Checking Program
| Test | Test Equipment | Check | Notes | Nominal | |
|---|---|---|---|---|---|
| Step | Multimeter | Value | |||
| MKM-587-A | of | between | |||
| 17 | Ohmmeter, range 20 MW | Body wiring harness | |||
| (central closing) | K37/ Ter. 20 | Ground | · Disconnect central locking control unit wiring harness plug K37 |
· Disconnect sun roof motor wiring harness plug M61
· Disconnect body/driver's door wiring harness plug X11
· Disconnect body/co-driver's door wiring harness plug X12
· Disconnect body/rear left door wiring harness plug X13
· Disconnect body/rear right door wiring harness plug X14
| greater than |
2 MW
| Ohmmeter, range 200 W | Body wiring harness | ||
|---|---|---|---|
| (central closing) | K37 Ter. 20 | · Measurement in wiring harness plug K37 |
· Connect central locking control unit wiring harness plug K37/Ter. 20 to ground
| greater than | |||
|---|---|---|---|
| 2 MW | |||
| X11/ Ter. 21 | · Measurement in wiring harness plug X11 | ||
| approx. | |||
| 0 W | |||
| X12/ Ter. 21 | · Measurement in wiring harness plug X12 | ||
| approx. |
0 W
| X13/ Ter. 1 | · Measurement in wiring harness plug X13 | |
|---|---|---|
| approx. |
0 W
| X14/ Ter. 1 | · Measurement in wiring harness plug X14 |
· After completing measurements, remove connection to wiring harness plug K37
| approx. |
0 W
| Possible Faults: |
(If nominal value is not attained)
· Interruption/short circuit in body wiring harness.
If nominal values are attained:
· Fault in wiring harness for doors or ECWW motor defective. To localise fault, carry out test steps 18-21.
· Fault in central locking control unit K37.
· Fault in sun roof motor M61 (drive unit).