ECWW, Checking Program
| Test | Test Equipment | Check | Notes | Nominal | |
|---|---|---|---|---|---|
| Step | Multimeter | Value | |||
| MKM-587-A | of | between | |||
| 12 | Ohmmeter, range 200 W | ||||
| Rear left ECWW switch S37.3 in switch S37 (console) | X13/ Ter. 5 | 2-pin/ Ter. B (SW) | · Disconnect rear left door wiring harness plug X13 | ||
| · Disconnect 2-pin wiring harness plug |
· Press "raise" on switch S37.3 and hold down
· Measurement in wiring harness plug X13 (body side) and in 2-pin plug (left)
| approx. | ||
|---|---|---|
| 0 W | ||
| X13/ |
Ter. 9
| 2-pin/ |
Ter. B
| (SW) | · Press "lower" on switch S37.3 and hold down |
· Measurement in wiring harness plug X13 (body side) and in 2-pin plug (left)
| approx. | |
|---|---|
| 0 W | |
| Possible Faults: |
(If nominal value is not attained)
· Interruption or short circuit in body wiring harness between rear left door wiring harness plug X13 and 9-pin console wiring harness plug.
· 6-pin and/or 9-pin console wiring harness plug detached.
· Interruption or short circuit between ECWW switch S37.3 and 9-pin console wiring harness plug (internally)
· Interruption or short circuit in body wiring harness between body ground and 6-pin console wiring harness plug Ter. 5.
· Interruption or short circuit in body wiring harness between body ground and rear left door wiring harness plug X13/Ter. 4.
· Ground connection corroded.
· ECWW switch S37.3 defective.