Checking Program QOS - III
| Test | Test Equipment | Test | Notes | Nominal | ||
|---|---|---|---|---|---|---|
| Step | Multimeter | |||||
| MKM - 587 - A | ||||||
| of | ||||||
| between | Value | |||||
| 08 | Voltmeter range 20V, DC | Speedometer frequency signal | K76, ter. 1 | K76, ter. 9 | · Ignition 'OFF' |
· Secure vehicle against rolling away
· Jack up rear of vehicle
· Ignition "ON"
· Rotate rear wheels slowly
| · Measurement at wiring harness plug | varies between < 2 V and > 11.5 V | |
|---|---|---|
| Troubleshooting: | Nominal Value: | Cause of Fault: |
| If the speedometer does not function properly: | · Check speed sensor and speedometer circuit. |
With the speedometer functioning properly:
· Measure resistance with multimeter
from: Control unit QOS - III K76, wiring harness plug ter. 9
to: Vehicle speed sensor P14 (P43)
| approx. 0 W | · Line interrupted or short circuit to voltage |
from: Control unit QOS - III K76, wiring harness plug ter. 9
| to: Vehicle speed sensor P14 (P43) |
· Measure resistance with multimeter
from: Control unit QOS - III K76, wiring harness plug ter. 9
| to: Ground | > 20 MW | · Short circuit to ground |
from: Control unit QOS - III K76, wiring harness plug ter. 9
to: Vehicle speed sensor P14 (P43)
| If nominal values are attained: | · Vehicle speed sensor P14 (P43) defective |
|---|---|
| Components codes between brackets "( )" are for Monterey only |