Checking Program - Electrical Circuit QWS
| Test | Test Equipment | Test | Notes | Nominal | ||
|---|---|---|---|---|---|---|
| Step | Multimeter | |||||
| MKM - 587 - A | ||||||
| of | ||||||
| between | Value | |||||
| 05a | Voltmeter range 20V, DC | Voltage supply VSV1 Y58 (All except Campo / Brava 4JA1) | Y58, ter. 1 | Y58, ter. 2 | ||
| · Disconnect wiring harness plug from VSV1 Y58 |
· Engine running at idle speed
| · QWS switch "ON" | > 11.5 V | |
|---|---|---|
| · Briefly depress accelerator pedal fully |
· Measurements at wiring harness plug
| · Reconnect wiring harness plug after measurements | 0 V | |
|---|---|---|
| Troubleshooting: | Nominal Value: | Cause of Fault: |
· Ignition "OFF"
· Remove relay QWS K129 from relay socket
· Measure voltage with multimeter
| from: Relay QWS K129, relay socket ter. 4 (ter. 6 for Frontera) |
to: Relay QWS K129, relay socket ter. 5 (ter. 2 for Frontera)
| · Ignition "ON" | > 11.5 V | · Line interrupted |
from: Relay QWS K129, relay socket ter. 5 (ter. 2 for Frontera)
to: EGR control unit K135, wiring harness plug ter. 12 (ter 8 for Monterey as of MY'96)
| or | |
|---|---|
| · Ignition "OFF" | · EGR system defective, see section 9 or 10 (EGR) |
· Measure resistance with multimeter
from: Relay QWS K129, relay socket ter. 5 (ter. 2 for Frontera)
| to: Ground | > 20 kW | · Short circuit to ground |
from: Relay QWS K129, relay socket ter. 5 (ter. 2 for Frontera)
to: EGR control unit K135, wiring harness plug ter. 12
or
· EGR control unit K135 defective
· Disconnect wiring harness plug from VSV1 Y58
· Measure resistance with multimeter
| from: Relay QWS K129, relay socket ter. 3 (ter. 8 for Frontera) (ter. 1 for Campo) | ||
|---|---|---|
| to: VSV1 Y58, wiring harness plug ter. 1 (ter. 2 for Monterey) | approx. 0 W | · Line interrupted or short circuit to voltage |
from: Relay QWS K129, relay socket ter. 3 (ter. 8 for Frontera) (ter. 1 for Campo)
to: VSV1 Y58, wiring harness plug ter. 1 (ter. 2 for Monterey)
· Measure resistance with multimeter
from: VSV1 Y58 wiring harness plug ter. 2 (ter. 1 for Monterey)
| to: Ground | approx. 0 W | · Line interrupted |
from: VSV1 Y58, wiring harness plug ter. 2 (ter. 1 for Monterey)
to: Ground
| If nominal values are attained: | · Relay QWS K129 defective |