SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-209
DTC B1404: Driver's Air Bag Module (1st Squib Ignition Drive Circuit) System Detected Short Circuit
DTC B1405: Driver's Air Bag Module (1st Squib Ignition Drive Circuit) System Detected Open Circuit
DTC B1414: Passenger’s (Front) Air Bag Module (1st Squib Ignition Drive Circuit) System Detected
Short Circuit DTC B1415: Passenger’s (Front) Air Bag Module (1st Squib Ignition Drive Circuit)
System Detected Open Circuit DTC B1424: Side-Airbag Module (RH) (Squib) System Detected Short
Circuit DTC B1425: Side-Airbag Module (RH) (Squib) System Detected Open Circuit DTC B1434:
Side-Airbag Module (LH) (Squib) System Fault 3 for Ignition Drive Circuit DTC B1435: Side-Airbag
Module (LH) (Squib) System Fault 4 for Ignition Drive Circuit DTC B1464: Seat Belt Pre-tensioner (RH)
(Squib Ignition Drive Circuit) System Detected Short Circuit DTC B1465: Seat Belt Pre-tensioner (RH)
(Squib Ignition Drive Circuit) System Detected Open Circuit DTC B1466: Analog G-Sensor System in
the SRS-ECU DTC B1467: Safing G-Sensor Open Circuit DTC B1468: Safing G-Sensor Short Circuit
DTC B1469: Safing G-Sensor for Side Air Bag Faults DTC B1474: Seat Belt Pre-tensioner (LH) (Squib
Ignition Drive Circuit) System Detected Short Circuit DTC B1475: Seat Belt Pre-tensioner (LH) (Squib
Ignition Drive Circuit) System Detected Open Circuit DTC B1478: SRS-ECU Capacitor Circuit Voltage
too High DTC B1479: SRS-ECU Capacitor Circuit Voltage too Low DTC B1484: Driver's Air Bag Module
(2nd Squib Ignition Drive Circuit) System Detected Short Circuit DTC B1485: Driver's Air Bag Module
(2nd Squib Ignition Drive Circuit) System Detected Open Circuit DTC B1494: Passenger’s (Front) Air
Bag Module (2nd Squib Ignition Drive Circuit) System Detected Short Circuit DTC B1495: Passenger’s
(Front) Air Bag Module (2nd Squib Ignition Drive Circuit) System Detected Open Circuit DTC B1496:
SRS-ECU Non-Volatile Memory (EEPROM) DTC B1497: SRS-ECU ASIC (for frontal activation) DTC
B1498: SRS-ECU ROM or RAM DTC B1552: Changing Circuit Shorted DTC B1553: Changig Circuit
open DTC B1554: SG BY-PASS Circuit Malfunction DTC B1555: SG BY-PASS Circuit (FET) Open DTC
B1557: SRS-ECU ASIC
CAUTION
If DTCs is set in the SRS-ECU, always diagnose
the CAN main bus line.
DTC SET CONDITIONS
• These DTC 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:
TROUBLESHOOTING HINTS
• Malfunction of the SRS-ECU
CODE NO.
PART/CIRCUIT INTEGRAL TO
SRS-ECU
SYMPTOM
B1404
Driver's air bag module (1st squib
ignition drive circuit)
• Short circuit in the squib ignition drive circuit
B1405
• Open circuit in the squib ignition drive circuit
B1414
Front passenger's 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
B1464
Seat belt pre-tensioner (RH)
(squib ignition drive circuit)
• Short circuit in the squib ignition drive circuit
B1465
• Open circuit in the squib ignition drive circuit
B1466
Analog G-sensor
• 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