Dtc B1835/58 Short In Front Passenger Side Curtain Shield Squib Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CURTAIN SHIELD AIRBAG ASSEMBLY LH (CURTAIN SHIELD SQUIB LH)

CHECK CONNECTOR

CHECK FLOOR WIRE

CHECK CENTER AIRBAG SENSOR ASSEMBLY

DTC B1835/58 Short in Front Passenger Side Curtain Shield Squib Circuit

DTC B1836/58 Open in Front Passenger Side Curtain Shield Squib Circuit

DTC B1837/58 Short to GND in Front Passenger Side Curtain Shield Squib Circuit

DTC B1838/58 Short to B+ in Front Passenger Side Curtain Shield Squib Circuit


DESCRIPTION

The front passenger side curtain shield squib circuit consists of the center airbag sensor and the front passenger side curtain shield airbag.
The circuit instructs the SRS to deploy when the deployment conditions are met.
These DTCs are recorded when a malfunction is detected in the front passenger side curtain shield squib circuit.

DTC Code
Detection Condition
Trouble Area
B1835/58
When all conditions below are met:
  1. The center airbag sensor receives a line short circuit signal 5 times in the front passenger side curtain shield squib circuit during primary check.
  2. Front passenger side curtain shield squib malfunction
  3. Center airbag sensor malfunction
  1. Floor wire
  2. Curtain shield airbag assembly LH
  3. Center airbag sensor assembly
B1836/58
When all conditions below are met:
  1. The center airbag sensor receives an open circuit signal in the front passenger side curtain shield squib circuit for 2 seconds.
  2. Front passenger side curtain shield squib malfunction
  3. Center airbag sensor malfunction
  1. Floor wire
  2. Curtain shield airbag assembly LH
  3. Center airbag sensor assembly
B1837/58
When all conditions below are met:
  1. The center airbag sensor receives a short circuit to ground signal in the front passenger side curtain shield squib circuit for 0.5 seconds.
  2. Front passenger side curtain shield squib malfunction
  3. Center airbag sensor malfunction
  1. Floor wire
  2. Curtain shield airbag assembly LH
  3. Center airbag sensor assembly
B1838/58
When all conditions below are met:
  1. The center airbag sensor receives a short circuit to B+ signal in the front passenger side curtain shield squib circuit for 0.5 seconds.
  2. Front passenger side curtain shield squib malfunction
  3. Center airbag sensor malfunction
  1. Floor wire
  2. Curtain shield airbag assembly LH
  3. Center airbag sensor assembly

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Supplemental Restraint System.Airbag System. Dtc B1835/58 Short In Front Passenger Side Curtain Shield Squib Circuit


INSPECTION PROCEDURE

HINT:
  1. Perform the simulation method by selecting "check mode" (signal check) with the intelligent tester (Toyota Fortuner RM000000YVZ008X.html).
  2. After selecting "check mode" (signal check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on various types of roads (Toyota Fortuner RM000000XFD0EGX.html).
1.CHECK CURTAIN SHIELD AIRBAG ASSEMBLY LH (CURTAIN SHIELD SQUIB LH)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Supplemental Restraint System.Airbag System. Dtc B1835/58 Short In Front Passenger Side Curtain Shield Squib Circuit

  1. Turn the ignition switch OFF.

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

  1. Disconnect the connector from the curtain shield airbag RH.

  1. Connect the white wire side of SST (resistance: 2.1 Ω) to connector C.

    CAUTION:
    Never connect the tester to the curtain shield airbag RH (curtain shield squib RH) for measurement, as this may lead to a serious injury due to airbag deployment.
    NOTICE:
    1. Do not forcibly insert SST into the terminals of the connector when connecting SST.
    2. Insert SST straight into the terminals of the connector.
SST
09843-18061

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

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

  1. Clear the DTCs (Toyota Fortuner RM000000YVY008X.html).

  1. Turn the ignition switch OFF.

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

  1. Check for DTCs (Toyota Fortuner RM000000YVY008X.html).

    OK:
    DTC B1835, B1836, B1837 or B1838 is not output.
    HINT:
    Codes other than DTC B1835, B1836, B1837, B1838 may be output at this time, but they are not related to this check.


NG
Go to step 2
OK

REPLACE CURTAIN SHIELD AIRBAG ASSEMBLY LH

2.CHECK CONNECTOR

  1. Turn the ignition switch OFF.

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

  1. Disconnect SST from connector C.

  1. Check that the floor wire connector (on the curtain shield airbag LH side) is not damaged.

    OK:
    The lock button is not disengaged, or the claw of the lock is not deformed or damaged.


NG
REPLACE FLOOR WIRE
OK


3.CHECK FLOOR WIRE
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Supplemental Restraint System.Airbag System. Dtc B1835/58 Short In Front Passenger Side Curtain Shield Squib Circuit

  1. Disconnect the connectors from the center airbag sensor.

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

  1. Turn the ignition switch ON.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    C24-2 (ICL-) - Body ground
    		Ignition switch ON
    		Below 1 V
    C24-1 (ICL+) - Body ground

  1. Turn the ignition 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
    C24-2 (ICL-) - C24-1 (ICL+)
    		Always
    		Below 1 Ω

  1. Release the activation prevention mechanism built into connector B (Toyota Fortuner RM000000XFD0EGX.html).

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    C24-2 (ICL-) - C24-1 (ICL+)
    		Always
    		1 MΩ or higher
    C24-2 (ICL-) - Body ground
    C24-1 (ICL+) - Body ground


NG
REPLACE FLOOR WIRE
OK


4.CHECK CENTER AIRBAG SENSOR ASSEMBLY
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Supplemental Restraint System.Airbag System. Dtc B1835/58 Short In Front Passenger Side Curtain Shield Squib Circuit

  1. Connect the connectors to the curtain shield airbag LH and the center airbag sensor.

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

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

  1. Clear the DTCs (Toyota Fortuner RM000000YVY008X.html).

  1. Turn the ignition switch OFF.

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

  1. Check for DTCs (Toyota Fortuner RM000000YVY008X.html).

    OK:
    DTC B1835, B1836, B1837 or B1838 is not output
    HINT:
    Codes other than DTC B1835, B1836, B1837, B1838 may be output at this time, but they are not related to this check.


NG
REPLACE CENTER AIRBAG SENSOR ASSEMBLY
OK

USE SIMULATION METHOD TO CHECK