1) Check for continuity between the connector terminals using a DMM when the ignition switch is operated.

| Switch operation |
Terminal No. |
Continuity |
| OFF position |
- |
- |
| ACC position |
1-3 |
Yes |
| ON position |
1-3 1-4 3-4 7-8 |
|
| ST position |
1-2 1-4 2-4 6-7 6-8 7-8 |