1. | Air bag diagnosis sensor unit B37, B237, M147 | 2. | Occupant Classification System control unit B253 | 3. | Occupant Classification System seat sensor mat
4. | Passenger air bag OFF indicator M73 |  |  |  |
A. | View with rear console assembly removed | B. | Front passenger seat |  |

Component parts | Outline of function
Occupant Classification System seat sensor mat | Detects if the passenger seat is empty or occupied
Occupant Classification System control unit | Transmits the passenger seat status (occupied or empty) to air bag diagnosis sensor unit
Front passenger air bag OFF indicator | Turns the front passenger air bag OFF indicator lamp ON when the front passenger seat is occupied by a child or a child-seat
Air bag diagnosis sensor unit | Performs the deploy judgement of passenger air bag based on the information from Occupant Classification System control unit