Code No.B1405: Driver’s air bag module (squib) activating circuit open-circuited
Code No.B1415: Passenger’s (front) air bag module (squib) activating circuit open-circuited
Code No.B1425: Side-airbag module (RH) (squib) activating circuit open-circuited
Code No.B1435: Side-airbag module (LH) (squib) activating circuit open-circuited
Code No.B1445: Curtain air bag module (RH) (squib) activating circuit open-circuited
Code No.B1455: Curtain air bag module (LH) (squib) activating circuit open-circuited
Code No.B1465: Seat belt pre-tensioner (RH) activating circuit open-circuited
Code No.B1466: Analogue G-sensor malfunction
Code No.B1467: Safing G-sensor open-circuited (for frontal collision)
Code No.B1469: Safing G-sensor malfunction (for side collision)
Code No.B1475: Seat belt pre-tensioner (LH) activating circuit open-circuited
Code No.B1478: SRS-ECU capacitor circuit voltage too high
Code No.B1479: SRS-ECU capacitor circuit voltage too low
Code No.B1496: SRS-ECU non-volatile memory (EEPROM)
Code No.B1497: SRS-ECU ASIC (for frontal activation)
Code No.B1498: RS-ECU ROM or RAM
Code No.B1588: SRS-ECU up converter unit
Code No.B1589: SRS-ECU down converter unit
Code No.B1590: SRS-ECU ER capacitance big
Code No.B1591: SRS-ECU ER capacitance small
Code No.B1592: SRS-ECU front air bag analog G-sensor failure
Code No.B1594: SRS-ECU ASIC (for side activation)

caution

If diagnosis code is set in the SRS-ECU, always diagnose the CAN main bus line.

DIAGNOSIS CODE SET CONDITIONS

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:

Code NO.	Part/circuit integral to SRS-ECU	Symptom
B1405	Driver’s air bag module (squib ignition drive circuit)	Open circuit in the squib ignition drive circuit
B1415	Front passenger’s air bag module (squib ignition drive circuit)	Open circuit in the squib ignition drive circuit
B1425	Side-airbag module (RH) (squib ignition drive circuit)	Open circuit in the squib ignition drive circuit
B1435	Side-airbag module (LH) (squib ignition drive circuit)	Open circuit in the squib ignition drive circuit
B1445	Curtain airbag module (RH) (squib ignition drive circuit)	Open circuit in the squib ignition drive circuit
B1455	Curtain airbag module (LH) (squib ignition drive circuit)	Open circuit in the squib ignition drive circuit
B1465	Seat belt pre-tensioner (RH) (squib ignition drive circuit)	Open circuit in the squib ignition drive circuit
B1466	Analogue G-sensor	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
B1467	Safing G-sensor (front air bag)	Open 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
B1475	Seat belt pre-tensioner (LH) (squib ignition drive circuit)	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	Capacitor	Voltage at the capacitor terminal is lower than the specified value for five seconds or more (This is not detected if diagnosis code No.B1476 or B1477 indicating battery positive voltage drop has been set).
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
B1588	Backup capacitor system	Up converter unit
B1589	Backup capacitor system	Down converter unit
B1590	Backup capacitor system	ER capacitance big
B1591	Backup capacitor system	ER capacitance small
B1592	Front air bag analog G-sensor	Sensor failure
B1594	Control unit	When the ASIC (side activation) are abnormal

PROBABLE CAUSES

Malfunction of the SRS-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics.

warning

Since the radiator fan rotates during CAN bus line diagnostics, make sure that no one is servicing the engine compartment before diagnosing the CAN bus line. Since the CAN communication stops when diagnosing the CAN bus line, the ETACS-ECU detects the time-out of the engine-ECU, and activates the radiator fan to prevent overheating as fail-safe.

Use the M.U.T.-III to check the CAN bus lines.

Q. Is the CAN bus line found to be normal?

	Go to Step 2.

	Repair the CAN bus line (Refer to GROUP 54C, Troubleshooting - Can Bus Diagnosis Table Diagnosis ).

STEP 2. Check whether the diagnosis code is reset.

Check again if the diagnosis code is set.

(1)Erase the diagnosis code.

(2)Turn the ignition switch to the "ON" position.

(3)Check if the diagnosis code is set.

(4)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Is the diagnosis code 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 ).