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 sensor P55 | K161, ter. 13 | K161, ter. 11 | · Ignition "OFF" | |
|---|---|---|---|---|---|
| · Coolant temperature 20°C / 68°F | ± 2.0 kW | ||||
| · Coolant temperature 80°C / 176°F |
· Measurements at wiring harness plug
Note:
| A detailed check of the function of the coolant temperature sensor P55 is given in section 4.3 | + 0.3 kW | |||||
|---|---|---|---|---|---|---|
| K161, ter. 13 | Ground | · Measurements at wiring harness plug | > 20 MW | |||
| Troubleshooting: | Nominal Value: | Cause of Fault: | ||||
| · Disconnect wiring harness plug from coolant temperature sensor P55 |
· Measure resistance with multimeter
from: Control unit QOS & EGR K161, wiring harness plug ter. 13
| to: Coolant temperature sensor P55, wiring harness plug ter. 2 | approx. 0 W | · Line interrupted or short circuit to voltage |
from: Control unit QOS & EGR K161, wiring harness plug ter. 13
to: Coolant temperature sensor P55, wiring harness plug ter. 2
· Measure resistance with multimeter
from: Control unit QOS & EGR K161, wiring harness plug ter. 13
| to: Ground | > 20 MW | · Short circuit to ground |
from: Control unit QOS & EGR K161, wiring harness plug ter. 13
to: Coolant temperature sensor P55, wiring harness plug ter. 2
· Measure resistance with multimeter
from: Control unit QOS & EGR K161, wiring harness plug ter. 11
| to: Coolant temperature sensor P55, wiring harness plug ter. 1 | approx. 0 W | · Line interrupted or short circuit to voltage |
from: Control unit QOS & EGR K161, wiring harness plug ter. 11
to: Coolant temperature sensor P55, wiring harness plug ter. 1
· Measure resistance with multimeter
from: Control unit QOS & EGR K161, wiring harness plug ter. 11
| to: Ground | > 20 MW | · Short circuit to ground |
from: Control unit QOS & EGR K161, wiring harness plug ter. 11
to: Coolant temperature sensor P55, wiring harness plug ter. 1
| If nominal values are attained: | · Coolant temperature sensor P55 defective |