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SRS Air Bag Warning Light
 
 
DESIGN/PURPOSE
The warning light warns the driver that SRS air bag system is not normal.
 
 
BULB CHECK
For 7 seconds after the ignition switch is turned ON.
 
 
SYSTEM DIAGRAM
note
  • *1: For DTCs of the SRS air bag system, refer to DTC Index.
  • *2: For occupant detection system control unit, malfunction signal includes the zero point reset not yet performed.
 
 
SIGNAL PATH
  • When a malfunction is detected, air bag diagnosis sensor unit transmits the warning signal to combination meter.
  • Combination meter turns SRS air bag warning light ON, according to the received signal.
 
 
LIGHTING CONDITION
When a malfunction of the following part or status is detected.
  • Deployment of air bag
  • Air bag diagnosis sensor unit
  • Combination meter
  • Circuit between air bag diagnosis sensor unit and combination meter
  • Battery voltage not normal (approximately 9 V or less, or 16 V or more)
  • Each air bag module main unit
  • Each seat belt pre-tensioner main unit
  • Crash zone sensor main unit
  • Each satellite sensor
  • Circuit between each air bag module and air bag diagnosis sensor unit
  • Circuit between each seat belt pre-tensioner and air bag diagnosis sensor unit
  • Circuit between crash zone sensor and air bag diagnosis sensor unit
  • Circuit between each satellite sensor and air bag diagnosis sensor unit
  • Occupant detection system control unit (Includes the zero point reset not yet performed.)
noteFor the relation between warning light and DTC, refer to DTC Index.
 
 
SHUTOFF CONDITION
 
 
When Being Turned ON Due to Deployment of Air Bag
Replace air bag diagnosis sensor unit.
 
 
When Turned ON Due to a Malfunction of SRS Air Bag Warning Light Circuit
Repair SRS air bag warning light circuit system.
 
 
When Turned ON Due to a Malfunction of Air Bag Module or Air Bag Module Circuit
Repair the malfunctioning part. Erase self-diagnosis result memory.
 
 
When Turned ON Due to a Malfunction of Occupant Detection System Control Unit
  • Perform the zero point reset.
  • Replace Occupant detection system control unit or the malfunction parts.
 
 
TIMING CHART