Code No.B1404: Driver’s air bag module (squib) activating circuit short-circuited
Code No.B1405: Driver’s air bag module (squib) activating circuit open-circuited
Code No.B1414: Passenger’s (front) air bag module (1st squib) activating circuit short-circuited
Code No.B1415: Passenger’s (front) air bag module (1st squib) activating circuit open-circuited
Code No.B1424: Right side-airbag module (squib) activating circuit short-circuited
Code No.B1425: Right side-airbag module (squib) activating circuit open-circuited
Code No.B1434: Left side-airbag module (squib) activating circuit short-circuited
Code No.B1435: Left side-airbag module (squib) activating circuit open-circuited
Code No.B1444: Right curtain air bag module (squib) activating circuit short-circuited
Code No.B1445: Right curtain air bag module (squib) activating circuit open-circuited
Code No.B1454: Left curtain air bag module (squib) activating circuit short-circuited
Code No.B1455: Left curtain air bag module (squib) activating circuit open-circuited
Code No.B1466: Analog G-sensor malfunction
Code No.B1478: SRS-ECU backup capacitor circuit voltage too High
Code No.B1479: SRS-ECU backup capacitor circuit voltage too Low
Code No.B1494: Passenger’s (front) air bag (2nd squib) activating circuit short-circuited
Code No.B1495: Passenger’s (front) air bag (2nd squib) activating circuit open-circuited
Code No.B1496: SRS-ECU non-volatile memory (EEPROM)
Code No.B1497: SRS-ECU application specific integrated circuit (for frontal activation)
Code No.B1498: SRS-ECU abnormal condition in ROM or RAM
Code No.B1547: Passenger’s air bag cut off activating circuit
Code No.B1557: SRS-ECU application specific integrated circuit
Code No.B1588: SRS-ECU backup capacitor system (Up converter unit)
Code No.B1589: SRS-ECU backup capacitor system (Down converter unit)
Code No.B1590: SRS-ECU backup capacitor system (capacitance big)
Code No.B1591: SRS-ECU backup capacitor system (capacitance small)
Code No.B1607: Seat belt pre-tensioner (driver’s side) activating circuit short-circuited
Code No.B1608: Seat belt pre-tensioner (driver’s side) activating circuit open-circuited
Code No.B1613: Seat belt pre-tensioner (passenger’s side) (squib) activating circuit short-circuited
Code No.B1614: Seat belt pre-tensioner (passenger’s side) (squib) activating circuit open-circuited
Code No.B1629: Front passenger’s lap pre-tensioner (squib) activating circuit short-circuited
Code No.B1630: Front passenger’s lap pre-tensioner (squib) system activating circuit open-circuited
Code No.B1635: Driver’s knee air bag (squib) activating circuit short-circuited
Code No.B1636: Driver’s knee air bag module (squib) activating circuit open-circuited


caution If diagnosis codes is set in the SRS-ECU, always diagnose the CAN main bus line.
DIAGNOSIS CODE SET CONDITIONS
PROBABLE CAUSE
Code No.
 Part/Circuit integral to SRS-ECU
 Trouble causes
B1404
 Driver’s air bag module (squib ignition drive circuit)
  • Short circuit in the squib ignition drive circuit
B1405
  • Open circuit in the squib ignition drive circuit
B1414
 Passenger’s (front) air bag module (1st squib ignition drive circuit)
  • Short circuit in the squib ignition drive circuit
B1415
  • Open circuit in the squib ignition drive circuit
B1424
 Side-airbag module (RH) (squib ignition drive circuit)
  • Short circuit in the squib ignition drive circuit
B1425
  • Open circuit in the squib ignition drive circuit
B1434
 Side-airbag module (LH) (squib ignition drive circuit)
  • Short circuit in the squib ignition drive circuit
B1435
  • Open circuit in the squib ignition drive circuit
B1444
 Curtain air bag module (RH) (squib ignition drive circuit)
  • Short circuit in the squib ignition drive circuit
B1445
  • Open circuit in the squib ignition drive circuit
B1454
 Curtain air bag module (LH) (squib ignition drive circuit)
  • Short circuit in the squib ignition drive circuit
B1455
  • Open circuit in the squib ignition drive circuit
B1466
 Analog G-sensor (front air bag)
  • When the analogue G-sensor is not operating
  • When the characteristics of the analogue G-sensor are abnormal
  • When the output from the analogue G-sensor is abnormal
B1478
 Capacitor
  • Voltage at the capacitor terminal is higher than the specified value for five seconds or more
B1479
  • Voltage at the capacitor terminal is lower than the specified value for five seconds or more (This is not detected if diagnosis code B1476 or B1477 indicating battery positive voltage drop has been set).
B1494
 Passenger’s (front) air bag module (2nd squib ignition drive circuit)
  • Short circuit in the squib ignition drive circuit
B1495
  • Open circuit in the squib ignition drive circuit
B1496
 Non-volatile memory (EEPROM)
  • When EEPROM communication error occurs
B1497
 Application specific integrated circuit (for frontal activation)
  • When the application specific integrated circuit (frontal activation) are abnormal
B1498
 ROM or RAM
  • When the ROM or RAM are abnormal
B1547
 Passenger’s air bag cut off activating circuit (squib ignition drive circuit)
  • Cut OFF (squib ignition drive circuit)
B1557
 Application specific integrated circuit
  • When the application specific integrated circuit are abnormal
B1588
 Backup capacitor system
 Backup capacitor up converter
B1589
 Backup capacitor down converter
B1590
 Backup capacitor capacitance big
B1591
 Backup capacitor capacitance small
B1607
 Seat belt pre-tensioner (driver side) (squib ignition drive circuit)
  • Short circuit in the squib ignition drive circuit
B1608
  • Open circuit in the squib ignition drive circuit
B1613
 Seat belt pre-tensioner (passenger side) (squib ignition drive circuit)
  • Short circuit in the squib ignition drive circuit
B1614
  • Open circuit in the squib ignition drive circuit
B1629
 Lap pre-tensioner (passenger side) (squib ignition drive circuit)
  • Short circuit in the squib ignition drive circuit
B1630
  • Open circuit in the squib ignition drive circuit
B1635
 Driver’s knee air bag module (squib ignition drive circuit)
  • Short circuit in the squib ignition drive circuit
B1636
  • Open circuit in the squib ignition drive circuit

DIAGNOSIS PROCEDURE
Replace the SRS-ECU.