DTC    B1615/14    Front Airbag Sensor LH Circuit Malfunction

for Preparation Click here


SYSTEM DESCRIPTION

The front airbag sensor LH consists of the diagnostic circuit and front deceleration sensor. The center airbag sensor receives signals from the front deceleration sensor, and 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.

DTC No.
DTC Detection Condition
Trouble Area
B1615/14
When one of following conditions is met:
  1. When center airbag sensor assembly receives line short signal, open signal, short to ground signal or B+ short signal in front airbag sensor LH circuit for 2 seconds
  2. Front airbag sensor LH malfunction
  3. Center airbag sensor assembly malfunction
  1. Front airbag sensor LH
  2. Center airbag sensor assembly
  3. Instrument panel wire
  4. Engine room main wire

WIRING DIAGRAM


H100359E05


INSPECTION PROCEDURE

1.CHECK FOR DTC
H100360E04

  1. Turn the ignition switch ON, and wait for at least 60 seconds.

  1. Clear the DTCs stored in memory (Click here).

  1. Turn the ignition switch OFF.

  1. Turn the ignition switch ON, and wait for at least 60 seconds.

  1. Check for DTCs (Click here).

    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.



NG
Go to step 2
OK

USE SIMULATION METHOD TO CHECK 

2.CHECK CONNECTION OF CONNECTORS

  1. Turn the ignition switch OFF.

  1. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

  1. Check that the connectors are properly connected to the center airbag sensor and front airbag sensor LH.

    OK:
    Connectors are connected.



NG
CONNECT CONNECTORS, THEN GO TO STEP 1
OK


3.CHECK FRONT AIRBAG SENSOR LH CIRCUIT (OPEN)
H100399E02

  1. Disconnect the connectors from the center airbag sensor and front airbag sensor LH.

  1. Using a service wire, connect terminals A14-28 (-SL) and A14-30 (+SL) of connector B.

    NOTICE:
    Do not forcibly insert a service wire into the terminals of the connector.

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    A5-2 (+SL) - A5-1 (-SL)
    		Below 1 Ω



NG
Go to step 8
OK


4.CHECK FRONT AIRBAG SENSOR LH CIRCUIT (SHORT)
H100362E06

  1. Disconnect the service wire from connector B.

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    A5-2 (+SL) - A5-1 (-SL)
    		1 MΩ or higher



NG
Go to step 9
OK


5.CHECK FRONT AIRBAG SENSOR LH CIRCUIT (TO B+)
H100362E06

  1. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

  1. Turn the ignition switch ON.

  1. Measure the voltage of the wire harness side connector.

    Standard voltage:
    Tester Connection
    		Specified Condition
    A5-2 (+SL) - Body ground
    		Below 1 V
    A5-1 (-SL) - Body ground
    		Below 1 V



NG
Go to step 10
OK


6.CHECK FRONT AIRBAG SENSOR LH CIRCUIT (TO GROUND)
H100362E06

  1. Turn the ignition switch OFF.

  1. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    A5-2 (+SL) - Body ground
    		1 MΩ or higher
    A5-1 (-SL) - Body ground
    		1 MΩ or higher



NG
Go to step 11
OK


7.CHECK FRONT AIRBAG SENSOR LH
H100363E04

  1. Connect the connectors to the center airbag sensor.

  1. Interchange the front airbag sensor LH with the front airbag sensor RH and connect the connectors to them.

  1. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

  1. Turn the ignition switch ON, and wait for at least 60 seconds.

  1. Clear the DTCs (Click here).

  1. Turn the ignition switch OFF.

  1. Turn the ignition switch ON, and wait for at least 60 seconds.

  1. Check for DTCs (Click here).

    Result:
    Result
    		Proceed to
    DTC B1615/14 is output
    		A
    DTC B1610/13 is output
    		B
    DTC B1610/13 and B1615/14 are not output
    		C



A
REPLACE CENTER AIRBAG SENSOR ASSEMBLY

B
REPLACE FRONT AIRBAG SENSOR LH
C

USE SIMULATION METHOD TO CHECK 

8.CHECK ENGINE ROOM MAIN WIRE (OPEN)
H100364E05

  1. Disconnect the engine room main wire connector from the instrument panel wire.

  1. Using a service wire, connect terminals A5-1 (-SL) and A5-2 (+SL) of connector B.

    NOTICE:
    Do not forcibly insert a service wire into the terminals of the connector.

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    IF1-3 (+SL) - IF1-4 (-SL)
    		Below 1 Ω



NG
REPAIR OR REPLACE ENGINE ROOM MAIN WIRE
OK

REPAIR OR REPLACE INSTRUMENT PANEL WIRE 

9.CHECK ENGINE ROOM MAIN WIRE (SHORT)
H100365E06

  1. Disconnect the engine room main wire connector from the instrument panel wire.

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    IF1-3 (+SL) - IF1-4 (-SL)
    		1 MΩ or higher



NG
REPAIR OR REPLACE ENGINE ROOM MAIN WIRE
OK

REPAIR OR REPLACE INSTRUMENT PANEL WIRE 

10.CHECK ENGINE ROOM MAIN WIRE (TO B+)
H100365E06

  1. Turn the ignition switch OFF.

  1. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

  1. Disconnect the engine room main wire connector from the instrument panel wire.

  1. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

  1. Turn the ignition switch ON.

  1. Measure the voltage of the wire harness side connector.

    Standard voltage:
    Tester Connection
    		Specified Condition
    IF1-3 (+SL) - Body ground
    		Below 1 V
    IF1-4 (-SL) - Body ground
    		Below 1 V



NG
REPAIR OR REPLACE ENGINE ROOM MAIN WIRE
OK

REPAIR OR REPLACE INSTRUMENT PANEL WIRE 

11.CHECK ENGINE ROOM MAIN WIRE (TO GROUND)
H100365E06

  1. Disconnect the engine room main wire connector from the instrument panel wire.

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    IF1-3 (+SL) - Body ground
    		1 MΩ or higher
    IF1-4 (-SL) - Body ground
    		1 MΩ or higher



NG
REPAIR OR REPLACE ENGINE ROOM MAIN WIRE
OK

REPAIR OR REPLACE INSTRUMENT PANEL WIRE