1) Inspect for cruise control steering wheel switch illumination when the lighting switch is turned to ON.
1) Measure the resistance between the connector terminals using a DMM when the cruise control steering wheel switch is operated.

| Switch operation |
Terminal No. |
Resistance |
| Main switch pressed and held |
5-14 |
349 Ω |
| CANCEL switch pressed and held |
196 Ω |
|
| SET/- switch pressed and held |
702 Ω |
|
| SET/+ switch pressed and held |
1.2 kΩ |
|
| RES switch pressed and held |
5-15 |
11.7 kΩ |
| Inter-vehicular distance switch pressed and held |
11.2 kΩ |
|
| LKAS switch pressed and held |
12.2 kΩ |
|
| MID mode L switch pressed and held |
4-7 |
2.9 kΩ |
| MID mode confirm switch pressed and held |
461 Ω |
|
| MID mode R switch pressed and held |
9.2 kΩ |
| Switch operation |
Terminal No. |
Resistance |
| Main switch pressed and held |
6-14 |
0 Ω |
| CANCEL switch pressed and held |
5-13 |
0 Ω |
| SET/- switch pressed and held |
1 kΩ |
|
| RES/+ switch pressed and held |
3 kΩ |
|
| MID mode L switch pressed and held |
4-7 |
2.9 kΩ |
| MID mode confirm switch pressed and held |
461 Ω |
|
| MID mode R switch pressed and held |
9.2 kΩ |