Code No.B1404: Driver’s air bag module (squib ignition drive circuit) system detected short circuit
Code No.B1405: Driver’s air bag module (squib ignition drive circuit) system detected open circuit
Code No.B1414: Passenger’s (front) air bag module (squib ignition drive circuit) system detected short circuit
Code No.B1415: Passenger’s (front) air bag module (squib ignition drive circuit) system detected open circuit
Code No.B1424: Side-airbag module (RH) (squib ignition drive circuit) system detected short circuit
Code No.B1425: Side-airbag module (RH) (squib ignition drive circuit) system detected open circuit
Code No.B1434: Side-airbag module (LH) (squib ignition drive circuit) system detected short circuit
Code No.B1435: Side-airbag module (LH) (squib ignition drive circuit) system detected open circuit
Code No.B1444: Curtain air bag module (RH) (squib ignition drive circuit) system detected short circuit
Code No.B1445: Curtain air bag module (RH) (squib ignition drive circuit) system detected open circuit
Code No.B1454: Curtain air bag module (LH) (squib ignition drive circuit) system detected short circuit
Code No.B1455: Curtain air bag module (LH) (squib ignition drive circuit) system detected open circuit
Code No.B1466: Analog G-sensor system in the SRS-ECU (front air bag)
Code No.B1467: Safing G-sensor open circuit (front air bag)
Code No.B1468: Safing G-sensor short circuit (front air bag)
Code No.B1469: Analog G-sensor system in the SRS-ECU (side air bag)
Code No.B1478: SRS-ECU backup capacitor circuit voltage too High
Code No.B1479: SRS-ECU backup capacitor circuit voltage too Low
Code No.B1496: SRS-ECU non-volatile memory (EEPROM)
Code No.B1498: SRS-ECU abnormal condition in ROM or RAM
Code No.B1550: SRS warning lamp drive circuit malfunction
Code No.B1557: SRS-ECU application specific integrated circuit
Code No.B1607: Seat belt pre-tensioner (driver’s side) (squib ignition drive circuit) system detected short circuit
Code No.B1608: Seat belt pre-tensioner (driver’s side) (squib ignition drive circuit) system detected open circuit
Code No.B1613: Seat belt pre-tensioner (passenger’s side) (squib ignition drive circuit) system detected short circuit
Code No.B1614: Seat belt pre-tensioner (passenger’s side) (squib ignition drive circuit) system detected open circuit
Code No.B1616: Safing G-sensor failure (front air bag)

TROUBLE JUDGEMENT

These diagnosis code are set when a fault is detected in the SRS-ECU. The most likely causes for this code to be set are shown in the table below:

PROBABLE CAUSE

Malfunction of the SRS-ECU

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	Driver’s air bag module (squib ignition drive circuit)	Open circuit in the squib ignition drive circuit
B1414	Passenger’s (front) air bag module (ignition drive circuit)	Short circuit in the squib ignition drive circuit
B1415	Passenger’s (front) air bag module (ignition drive circuit)	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	Side-airbag module (RH) (squib ignition drive circuit)	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	Side-airbag module (LH) (squib ignition drive circuit)	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	Curtain air bag module (RH) (squib ignition drive circuit)	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	Curtain air bag module (LH) (squib ignition drive circuit)	Open circuit in the squib ignition drive circuit
B1466	Analog G-sensor (front air bag)	When the analog G-sensor is not operating When the characteristics of the analog G-sensor are abnormal When the output from the analog G-sensor is abnormal
B1467	Safing G-sensor (front air bag)	Open circuit in the safing G-sensor
B1468	Safing G-sensor (front air bag)	Short circuit in the safing G-sensor
B1469	Analog G-sensor (side-airbag)	When the analog G-sensor is not operating When the characteristics of the analog G-sensor are abnormal When the output from the analog G-sensor is abnormal
B1478	Backup capacitor	Voltage at the capacitor terminal is higher than the specified value for five seconds or more
B1479	Backup capacitor	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).
B1496	Non-volatile memory (EEPROM)	When EEPROM communication error occurs
B1498	ROM or RAM	When the ROM or RAM are abnormal
B1550	SRS warning lamp drive circuit	Failure in SRS warning lamp drive circuit
B1557	Application specific integrated circuit	When the application specific integrated circuit are abnormal
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
B1615	Safing G-sensor (front air bag)	Safing sensor failure
B1616	Safing G-sensor (front air bag)	Safing circuit failure

DIAGNOSIS PROCEDURE

Replace the SRS-ECU (Refer to

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