Checking Program - Electrical Circuit EGR
| Test | Test Equipment | Test | Notes | Nominal | ||
|---|---|---|---|---|---|---|
| Step | Multimeter | |||||
| MKM - 587 - A | ||||||
| of | ||||||
| between | Value | |||||
| 02 | Ohmmeter range 20 MW | Coolant temperature switch S114 | K135, ter. 3 | Ground | · Ignition "OFF" | |
| · Switch opens when temperature rises above 30 °C | > 20 MW | |||||
| · Switch closes when temperature drops below 40 °C |
· Measurements at wiring harness plug
Note:
| A detailed check of the function of the coolant temperature switch S114 is given in section 4.3 | approx. 0 W | |
|---|---|---|
| Troubleshooting: | Nominal Value: | Cause of Fault: |
| · Coolant temperature switch S114 defective |
or
· Line interrupted or short circuit to ground
from: Coolant temperature switch S114 wiring harness plug ter. 1
| to: Control unit EGR K135, wiring harness plug ter. 3 |