Checking Program CSD
| Test | Test Equipment | Test | Notes | Nominal | ||
|---|---|---|---|---|---|---|
| Step | Multimeter | |||||
| MKM - 587 - A | ||||||
| of | ||||||
| between | Value | |||||
| 02a | Voltmeter range 20V, DC | Voltage supply (Frontera only) | Y51 | Ground | · Engine temperature > 7 - 13 °C | |
| · Ignition "ON" | > 11.5 V | |||||
| · Reconnect wiring harness plug to coolant temperature switch S108 | ||||||
| · Measurements at solenoid valve CSD Y51 | 0 V | |||||
| Troubleshooting: | Nominal Value: | Cause of Fault: |
· Ignition "OFF"
· Remove relay CSD K138 from relay socket
· Measure voltage with multimeter
from: Relay CSD K138, relay socket ter. 2 and ter. 4
| to: Ground | ||
|---|---|---|
| · Ignition "ON" | > 11.5 V | · Fuse F9D defective |
or
· Line interrupted
from: Fuse F9D
to: Relay CSD K138, relay socket ter. 2 and ter. 4
· Ignition "OFF"
· Disconnect wiring harness plug from control unit QOS - II K76
· Disconnect wiring harness plug from coolant temperature switch S108
· Measure resistance with multimeter
from: Relay CSD K138, relay socket ter. 6
| to: Ground | > 20 MW | · Short circuit to ground |
from: Relay CSD K138, relay socket ter. 6
to: Coolant temperature switch S108, wiring harness plug ter. 1
· Measure resistance with multimeter
from: Relay CSD K138, relay socket ter. 6
| to: Coolant temperature switch S108, wiring harness plug ter. 1 | approx. 0 W | · Line interrupted or short circuit to voltage |
from: Relay CSD K138, relay socket ter. 6
to: Coolant temperature switch S108, wiring harness plug ter. 1
· Disconnect wiring harness plug from solenoid valve CSD Y51
· Measure resistance with multimeter
from: Relay CSD K138, relay socket ter. 5
| to: Ground | > 20 MW | · Short circuit to ground |
from: Relay CSD K138, relay socket ter. 5
to: Solenoid valve CSD Y51, wiring harness plug ter. 1
· Measure resistance with multimeter
from: Relay CSD K138, relay socket ter. 5
| to: Solenoid valve CSD Y51, wiring harness plug ter. 1 | approx. 0 W | · Line interrupted or short circuit to voltage |
from: Relay CSD K138, relay socket ter. 5
to: Solenoid valve CSD Y51, wiring harness plug ter. 1
| If nominal values are attained: | · Relay CSD K138 defective |