B1615

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1615/14: Front Airbag Sensor LH Circuit Malfunction

DTC B1615/14 - Front Airbag Sensor LH Circuit Malfunction

DESCRIPTION

The front airbag sensor LH consists of the diagnostic circuit, the frontal deceleration sensor, etc.
If the center airbag sensor receives signals from the frontal deceleration sensor, it determines whether or not the SRS should be activated.
DTC B1615/14 is recorded when a malfunction is detected in the front airbag sensor LH circuit.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTC




(a) Turn the ignition switch OFF.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(d) Turn the ignition switch ON, and wait for at least 60 seconds.
(e) Clear the DTCs stored in memory Reading and Clearing Diagnostic Trouble Codes.
(f) Turn the ignition switch OFF.
(g) Turn the ignition switch ON, and wait for at least 60 seconds.
(h) Check the DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC B1615/14 is not output.
HINT: Codes other than DTC B1615/14 may be output at this time, but they are not related to this check.

OK -- USE SIMULATION METHOD TO CHECK
NG -- Continue to next step.
2. CHECK CONNECTION OF CONNECTOR
(a) Turn the ignition switch OFF.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Check that the connector is properly connected to the center airbag sensor and the front airbag sensor LH.
OK:
The connectors are connected.
NG -- CONNECT CONNECTORS
OK -- Continue to next step.
3. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (OPEN)




(a) Disconnect the connectors from the center airbag sensor and the front airbag sensor LH.
(b) Using a service wire, connect terminals A21-30 (+SL) and A21-28 (-SL) of connector "B".
NOTE:
Do not forcibly insert a service wire into the terminals of the connector when connecting.
(c) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- CHECK ENGINE ROOM MAIN WIRE
OK -- Continue to next step.
4. CHECK FRONT AIRBAG SENSOR LH




(a) Disconnect the service wire from connector "B".
(b) Connect the connectors to the center airbag sensor.
(c) Interchange the front airbag sensor RH with LH and connect the connectors to them.
(d) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(e) Turn the ignition switch OFF, and wait for at least 60 seconds.
(f) Clear the DTCs stored in memory Reading and Clearing Diagnostic Trouble Codes.
(g) Turn the ignition switch OFF.
(h) Turn the ignition switch ON, and wait for at least 60 seconds.
(i) Check the DTCs Reading and Clearing Diagnostic Trouble Codes.

Result





HINT: Codes other than DTC B1610/13 and B1615/14 may be output at this time, but they are not related to this check.

B -- REPLACE FRONT AIRBAG SENSOR LH
A -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY
C -- USE SIMULATION METHOD TO CHECK
5. CHECK ENGINE ROOM MAIN WIRE




(a) Disconnect the service wire from connector "B".
(b) Disconnect the engine room main wire connector from the instrument panel wire.
(c) Using a service wire, connect terminals IB1-2 (+SL) and IB1-1 (-SL) of connector "D".
NOTE:
Do not forcibly insert a service wire into the terminals of the connector when connecting.
(d) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPAIR OR REPLACE ENGINE ROOM MAIN WIRE
OK -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE