AIR BAG SYSTEM WARNING ALARM
id081000500400
Purpose
• The air bag system warning alarm notifies the driver that a malfunction occurred in the air bag system instead of the air bag/seat belt pre-tensioner system warning light.
Function
• When the SAS control module detects DTC B00D2:01 or B00D2:29 (air bag/seat belt pre-tensioner system warning light (transmission related error)), it sends an air bag system warning alarm request signal to the instrument cluster if DTCs other than DTC B00D2:01 or B00D2:29 (except DTCs which do not turn on air bag/seat belt pre-tensioner system warning light) are detected.
• When the instrument cluster receives the air bag system warning alarm request signal sent from the SAS control module via the CAN signal, the air bag system warning alarm sounds.
• The buzzer for the air bag system warning alarm has the following activation patterns as shown in the table.
Construction
• The air bag system warning alarm sounds a buzzer in the instrument cluster.
Operation
1. When the ignition is switched ON (while engine is stopped or running), the instrument cluster receives (1) the air bag system warning alarm request signal from the SAS control module.
2. The instrument cluster microcomputer turns the transistor on (2) based on the air bag system warning alarm request signal.
3. When the transistor turns on, the ground circuit of the alarm is established and the alarm sounds (3).
Fail-safe
• Not applicable
