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 and the front deceleration sensor.
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 power switch ON (IG), and wait for at least 60 seconds.




(b) Clear the DTCs DTC Check / Clear.
(c) Turn the power switch OFF.
(d) Turn the power switch ON (IG), and wait for at least 60 seconds.
(e) Check for DTCs DTC Check / Clear.
OK:
DTC B1615/14 is not output.
HINT: DTCs 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 power switch OFF.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Check that the connectors are properly connected to the center airbag sensor and the front airbag sensor LH.
OK:
The connectors are properly connected.
NG -- CONNECT CONNECTOR
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 A18-30 (+SL) and A18-28 (-SL) of connector B.
NOTE: Do not forcibly insert a service wire into the terminals of the connector.
(c) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- CHECK ENGINE ROOM MAIN WIRE (OPEN)
OK -- Continue to next step.

4. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (SHORT)




(a) Disconnect the service wire from connector B.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- CHECK ENGINE ROOM MAIN WIRE (SHORT)
OK -- Continue to next step.

5. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (TO B+)




(a) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(b) Turn the power switch ON (IG).
(c) Measure the voltage of the wire harness side connector.
Standard voltage:






NG -- CHECK ENGINE ROOM MAIN WIRE (TO B+)
OK -- Continue to next step.

6. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (TO GROUND)




(a) Turn the power switch OFF.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- CHECK ENGINE ROOM MAIN WIRE (TO GROUND)
OK -- Continue to next step.

7. CHECK FRONT AIRBAG SENSOR LH




(a) Connect the connectors to the center airbag sensor.
(b) Interchange the front airbag sensor LH with the front airbag sensor RH and connect the connectors to them.
(c) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(d) Turn the power switch ON (IG), and wait for at least 60 seconds.
(e) Clear the DTCs DTC Check / Clear.
(f) Turn the power switch OFF.
(g) Turn the power switch ON (IG), and wait for at least 60 seconds.
(h) Check for DTCs DTC Check / Clear.

Result





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

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




(a) Disconnect the service wire from connector B.
(b) Disconnect the instrument panel wire connector from the engine room main wire.
(c) Using a service wire, connect terminals F1-2 (+SL) and F1-1 (-SL) of connector E.
NOTE: Do not forcibly insert a service wire into the terminals of the connector.
(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
9. CHECK ENGINE ROOM MAIN WIRE (SHORT)




(a) Disconnect the engine room main wire connector from the instrument panel wire.
(b) 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
10. CHECK ENGINE ROOM MAIN WIRE (TO B+)




(a) Turn the power switch OFF.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Disconnect the engine room main wire connector from the instrument panel wire.
(d) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(e) Turn the power switch ON (IG).
(f) Measure the voltage of the wire harness side connector.
Standard voltage:






NG -- REPAIR OR REPLACE ENGINE ROOM MAIN WIRE
OK -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
11. CHECK ENGINE ROOM MAIN WIRE (TO GROUND)




(a) Disconnect the engine room main wire connector from the instrument panel wire.
(b) 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