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 activating circuit short-circuited
Code No.B1415: Passenger’s (front) air bag module 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: Analogue 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.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.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.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 stored in the SRS-ECU, always diagnose the CAN main bus line.

DIAGNOSIS CODE SET CONDITIONS

These diagnosis code are stored when a fault is detected in the SRS-ECU. The most likely causes for this code to be stored 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 (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	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	Analogue 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	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 stored).
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
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
B1635	Driver’s knee air bag module (squib ignition drive circuit)	Short circuit in the squib ignition drive circuit
B1636	Driver’s knee air bag module (squib ignition drive circuit)	Open circuit in the squib ignition drive circuit

DIAGNOSIS PROCEDURE

Replace the SRS-ECU.