1. Remove the airbag module from the steering wheel. 
2. Connect the tester as shown in the figure, then measure resistance between terminals when each switch is pressed.
|
Switch |
Resistance |
|
No switch pressed |
1 MΩ or more |
|
HOOK ON |
Approx. 330 Ω |
|
HOOK OFF |
Approx. 1010 Ω |
|
TALK |
Approx. 3.21 kΩ |
3. If resistance is out of specifications shown in the above table, a fault in switch is indicated. Replace the switch.