Code No.B1404: Driver’s Air Bag Module (1st Squib Ignition Drive Circuit) System Detected Short Circuit
Code No.B1405: Driver’s Air Bag Module (1st Squib Ignition Drive Circuit) System Detected Open Circuit
Code No.B1414: Passenger’s (Front) Air Bag Module (1st Squib Ignition Drive Circuit) System Detected Short Circuit
Code No.B1415: Passenger’s (Front) Air Bag Module (1st Squib Ignition Drive Circuit) System Detected Open Circuit
Code No.B1424: Side-Airbag Module (RH) (Squib) System Detected Short Circuit
Code No.B1425: Side-Airbag Module (RH) (Squib) System Detected Open Circuit
Code No.B1434: Side-Airbag Module (LH) (Squib) System Fault 3 for Ignition Drive Circuit
Code No.B1435: Side-Airbag Module (LH) (Squib) System Fault 4 for Ignition Drive Circuit
Code No.B1444: Curtain air bag Module (RH) (Squib) System Fault 3 for Ignition Drive Circuit
Code No.B1445: Curtain air bag Module (RH) (Squib) System Fault 4 for Ignition Drive Circuit
Code No.B1454: Curtain air bag Module (LH) (Squib) System Fault 3 for Ignition Drive Circuit
Code No.B1455: Curtain air bag Module (LH) (Squib) System Fault 4 for Ignition Drive Circuit
Code No.B1464: Seat Belt Pre-tensioner (RH) (Squib Ignition Drive Circuit) System Detected Short Circuit
Code No.B1465: Seat Belt Pre-tensioner (RH) (Squib Ignition Drive Circuit) System Detected Open Circuit
Code No.B1466: Analog G-Sensor System in the SRS-ECU
Code No.B1467: Safing G-Sensor Open Circuit
Code No.B1468: Safing G-Sensor Short Circuit
Code No.B1469: Safing G-Sensor for Side Air Bag Faults
Code No.B1474: Seat Belt Pre-tensioner (LH) (Squib Ignition Drive Circuit) System Detected Short Circuit
Code No.B1475: Seat Belt Pre-tensioner (LH) (Squib Ignition Drive Circuit) System Detected Open Circuit
Code No.B1478: SRS-ECU Capacitor Circuit Voltage too High
Code No.B1479: SRS-ECU Capacitor Circuit Voltage too Low
Code No.B1484: Driver’s Air Bag Module (2nd Squib Ignition Drive Circuit) System Detected Short Circuit
Code No.B1485: Driver’s Air Bag Module (2nd Squib Ignition Drive Circuit) System Detected Open Circuit
Code No.B1494: Passenger’s (Front) Air Bag Module (2nd Squib Ignition Drive Circuit) System Detected Short Circuit
Code No.B1495: Passenger’s (Front) Air Bag Module (2nd Squib Ignition Drive Circuit) System Detected Open Circuit
Code No.B1496: SRS-ECU Non-Volatile Memory (EEPROM)
Code No.B1497: SRS-ECU ASIC (for frontal activation)
Code No.B1498: SRS-ECU ROM or RAM
Code No.B1548: CAN Communication Malfunction
Code No.B1549: CAN Communication error
Code No.B1552: Changing Circuit shorted
Code No.B1553: Changinmg Circuit open
Code No.B1554: SG BY-PASS Circuit Malfunction
Code No.B1555: SG BY-PASS Circuit (FET) Open
Code No.B1557: SRS-ECU ASIC


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 (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
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
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
B1467
 Safing G-sensor (front air bag)
  • Open circuit in the safing G-sensor
B1468
  • Short circuit in the safing G-sensor
B1469
 Safing G-sensor (side-airbag)
  • When the safing G-sensor is not operating
  • When the characteristics of the safing G-sensor are abnormal
  • When the output from the safing G-sensor is abnormal
B1474
 Seat belt pre-tensioner (LH) (squib ignition drive circuit)
  • Short circuit in the squib ignition drive circuit
B1475
  • Open circuit in the squib ignition drive circuit
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 No.41 or 42 indicating battery positive voltage drop has been set).
B1484
 Driver’s air bag module (2nd squib ignition drive circuit)
  • Short circuit in the squib ignition drive circuit
B1485
  • Open circuit in the squib ignition drive circuit
B1494
 Front passenger’s 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 the non-volatile memory (EEPROM) are abnormal
B1497
 ASIC (for frontal activation)
  • When the ASIC (frontal activation) are abnormal
B1498
 ROM or RAM
  • When the ROM or RAM are abnormal
B1548
 CAN communication
  • When the CAN communication are abnormal
B1549
  • When the CAN communication are error
B1552
 Changing of Power Supply
  • Short circuit in the changing circuit
B1553
  • Open circuit in the changing circuit
B1554
 SG-BYPASS
  • When the ASIC (frontal activation) are abnormal
B1555
  • When the ROM or RAM are abnormal
B1557
 ASIC
  • When the ASIC are abnormal

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54F, Diagnosis ).

STEP 2. Check whether the diagnosis code is reset.
Check again if the diagnosis code is set.
(1)Erase the diagnosis code.
(2)Ignition: LOCK (OFF) position to ON
(3)On completion, check that the diagnosis code is not reset.

Q. Is the diagnosis codes set?
Replace the SRS-ECU (Refer to ).
There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).