Lexus IS250 · Service Manual RESTRAINTS

B1610/13

Diagnostic trouble codes

DESCRIPTION

The front airbag sensor RH consists of the diagnostic circuit, the frontal deceleration sensor, etc.
If the center airbag sensor assembly receives signals from the frontal deceleration sensor, it determines whether or not the SRS should be activated.
DTC B1610/13 is recorded when a malfunction is detected in the front airbag sensor RH circuit.
DTC No.
 DTC Detecting Condition
 Trouble Area
B1610/13
  1. The airbag sensor assembly center receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the front airbag sensor RH circuit for 2 seconds.
  2. Front airbag sensor RH malfunction
  3. Center airbag sensor assembly malfunction
  1. Instrument panel wire
  2. Engine room main wire
  3. Front airbag sensor RH
  4. Center airbag sensor assembly

WIRING DIAGRAM

H016901E10

INSPECTION PROCEDURE


1. CHECK DTC

  1. C114779E01
    Turn the engine switch on (IG), and wait for at least 60 seconds.

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

  1. Turn the engine switch off.

  1. Turn the engine switch on (IG), and wait for at least 60 seconds.

  1. Check for DTCs (Click here).

    OK:
    DTC B1610/13 is not output.

    HINT:
    Codes other than DTC B1610/13 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 engine switch off.

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

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

    OK:
    The connectors are properly connected.



 NG
CONNECT CONNECTORS, THEN GO TO STEP 1
OK


3. CHECK FRONT AIRBAG SENSOR RH CIRCUIT (OPEN)

  1. C114792E02
    Disconnect the connectors from the center airbag sensor assembly and the front airbag sensor RH.

  1. Using a service wire, connect J47-29 (+SR) and J47-27 (-SR) of connector "B".

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

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester connection
    		 Condition
    		 Specified condition
    A41-2 (+SR) - A41-1 (-SR)
    		 Always
    		 Below 1 Ω



NG
Go to step 8
OK


4. CHECK FRONT AIRBAG SENSOR RH CIRCUIT (SHORT)

  1. C114791E03
    Disconnect the service wire from connector "B".

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester connection
    		 Condition
    		 Specified condition
    A41-2 (+SR) - A41-1 (-SR)
    		 Always
    		 1 MΩ or higher



NG
Go to step 9
OK


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

  1. C114791E03
    Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

  1. Turn the ignition switch on (IG).

  1. Measure the voltage according to the value(s) in the table below.

    Standard voltage:
    Tester connection
    		 Condition
    		 Specified condition
    A41-2 (+SR) - Body ground
    		 Engine switch on (IG)
    		 Below 1 V
    A41-1 (-SR) - Body ground
    		 Engine switch on (IG)
    		 Below 1 V



NG
Go to step 10
OK


6. CHECK FRONT AIRBAG SENSOR RH CIRCUIT (SHORT TO GROUND)

  1. C114791E03
    Turn the engine switch off.

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

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester connection
    		 Condition
    		 Specified condition
    A41-2 (+SR) - Body ground
    		 Always
    		 1 MΩ or higher
    A41-1 (-SR) - Body ground
    		 Always
    		 1 MΩ or higher



NG
Go to step 11
OK


7. CHECK FRONT AIRBAG SENSOR RH

  1. C114793E01
    Connect the connectors to the center airbag sensor assembly.

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

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

  1. Turn the engine switch on (IG), and wait for at least 60 seconds.

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

  1. Turn the engine switch off.

  1. Turn the engine switch on (IG), and wait for at least 60 seconds.

  1. Check for DTCs (Click here).

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

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



 A
REPLACE CENTER AIRBAG SENSOR ASSEMBLY

B
REPLACE FRONT AIRBAG SENSOR RH
C

USE SIMULATION METHOD TO CHECK

8. CHECK INSTRUMENT PANEL WIRE (OPEN)

  1. C114794E02
    Disconnect the instrument panel wire connector from the engine room main wire.

    HINT:
    The service wire has already been inserted into connector "B".

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester connection
    		 Condition
    		 Specified condition
    JA5-2 (+SR) - JA5-1 (-SR)
    		 Always
    		 Below 1 Ω



NG
REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK

REPAIR OR REPLACE ENGINE ROOM MAIN WIRE

9. CHECK INSTRUMENT PANEL WIRE (SHORT)

  1. C114795E05
    Disconnect the instrument panel wire connector from the engine room main wire.

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester connection
    		 Condition
    		 Specified condition
    JA5-2 (+SR) - JA5-1 (-SR)
    		 Always
    		 1 MΩor higher



NG
REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK

REPAIR OR REPLACE ENGINE ROOM MAIN WIRE

10. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)

  1. C114795E05
    Turn the engine switch off.

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

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

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

  1. Turn the engine switch on (IG).

  1. Measure the voltage according to the value(s) in the table below.

    Standard voltage:
    Tester connection
    		 Condition
    		 Specified condition
    JA5-2 (+SR) - Body ground
    		 Engine switch on (IG)
    		 Below 1 V
    JA5-1 (-SR) - Body ground
    		 Engine switch on (IG)
    		 Below 1 V



NG
REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK

REPAIR OR REPLACE ENGINE ROOM MAIN WIRE

11. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

  1. C114795E05
    Disconnect the instrument panel wire connector from the engine room main wire.

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester connection
    		 Condition
    		 Specified condition
    JA5-2 (+SR) - Body ground
    		 Always
    		 1 MΩ or higher
    JA5-1 (-SR) - Body ground
    		 Always
    		 1 MΩ or higher



NG
REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK

REPAIR OR REPLACE ENGINE ROOM MAIN WIRE


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