Mazda CX-5 Service & Repair Manual: Passenger Sensing System [Two Step Deployment Control System]
Purpose
-
The passenger sensing system detects whether or not there is an occupant on the passenger seat to control the operation (deployment) of the passenger-side air bag system corresponding to the detected condition.
Function
-
Measures the total seated weight on the passenger-side seat, determines whether there is an adult or child present (including a child-restraint seat), or that it is empty, and then controls operation (deployment) or non-operation (non-deployment) of the passenger-side air bag module, pre-tensioner seat belt and lap pre-tensioner seat belt.
Construction
-
Consists of seat weight sensors installed above the passenger-side seat rails, a seat weight sensor control module installed on the back side of the passenger-side seat cushion, the PAD indicator (information display), and SAS control module installed in the console.
Operation
1. The load on the passenger-side front seat is converted into an electric signal by the strain gauge built into the seat weight sensor, and this signal is sent to the seat weight sensor control module.
2. The electronic signals from the four seat weight sensor are used for calculation by the seat weight sensor control module, which divides the result and then determines whether there is an adult or child (including a child-restraint seat) in the passenger-side seat, or that it is empty. The determined result is sent to the SAS control module.
3. The SAS control module performs control based on this determined result as shown in the following table when the module detects a level of impact requiring operation (deployment).
?: Possible-: Not possible|
Determined result |
Determined weight |
Passenger-side air bag module operation (deployment) |
Passenger-side side air bag module operation (deployment) |
Passenger-side pre-tensioner seat belt operation (deployment) |
Passenger-side lap pre-tensioner seat belt operation (deployment) |
PAD indicator |
|
Adult |
Approx. 42 kg {93 lb} or more*1 |
? |
? |
? |
? |
Not illuminated |
|
Child (including child-restraint seat) |
Approx. 30 kg {66 lb} or less*1 |
- |
- |
- |
- |
Illuminated |
|
Empty |
Approx. 0 kg {0 lb} |
- |
- |
- |
- |
Illuminated |
NOTE:
-
The passenger-side air bag module, the passenger-side side air bag module and the passenger-side pre-tensioner seat belt system will be turned off as the total seated weight drops toward 30 kg {66 lb}
and they will be turned on again before the weight exceeds 42 kg {93 lb}
.
CAUTION:
-
If any of the following work is performed, perform the seat weight sensor calibration using the Mazda Modular Diagnostic System (M-MDS).
-
Replacement with a new seat weight sensor
-
Replacement with a new seat weight sensor control module
-
Replacement with new passenger-side seat parts
-
Disassembly of the passenger-side seat
-
If any of the following work is performed, perform the seat weight sensor inspection using the Mazda Modular Diagnostic System (M-MDS).
-
Removal of the passenger-side seat
-
Loosening and retightening of passenger-seat fixing bolts
-
Or, the vehicle is involved in a collision
Passenger Air Bag Deactivation (Pad) Indicator Light Removal/Installation [Two
Step Deployment Control System]
NOTE:
The PAD indicator light (LED) is built into the display panel.
1. Remove the climate control unit. (with full-auto air conditioner).
2. Remove the clock. (with manual air conditi ...
Passenger Side Air Bag Module Removal/Installation [Standard Deployment Control
System]
WARNING:
Handling the air bag module improperly can accidentally deploy the air bag
module, which may seriously injure you. Read the air bag system service warnings
and cautions before h ...
Other materials:
Start Stop Unit Configuration (Using As Built Data)
NOTE:
If the configuration is performed using As-Built data, the set value of the
personalization function is reset to the initial value (condition when shipped
from factory). Verify the set value with the customer and perform the personalization
function setting after performing th ...
Add-On Non-Genuine Parts and Accessories
Non-genuine parts and accessories for Mazda vehicles can be found in stores.
These may fit your vehicle, but they are not approved by Mazda for use with Mazda
vehicles. When you install non-genuine parts or accessories, they could affect your
vehicle's performance or safety systems; the Maz ...
Front Body Control Module (Fbcm) Removal/Installation
CAUTION:
If configuration is not performed when the front body control module (FBCM)
is replaced with a new one, the vehicle specification information is not stored
in the front body control module (FBCM) and the system will not operate normally.
When performing configuration, ...
