Dtc B1860/64 Short In Driver Side Knee Airbag Squib Circuit

Restraints. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
Supplemental Restraint System. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DRIVER SIDE KNEE AIRBAG ASSEMBLY (DRIVER SIDE KNEE AIRBAG SQUIB)

CHECK CONNECTOR

CHECK INSTRUMENT PANEL WIRE (DRIVER SIDE KNEE AIRBAG SQUIB CIRCUIT)

DTC B1860/64 Short in Driver Side Knee Airbag Squib Circuit

DTC B1861/64 Open in Driver Side Knee Airbag Squib Circuit

DTC B1862/64 Short to GND in Driver Side Knee Airbag Squib Circuit

DTC B1863/64 Short to B+ in Driver Side Knee Airbag Squib Circuit


DESCRIPTION

The driver side knee airbag squib circuit consists of the center airbag sensor and the driver side knee airbag.
This circuit signals the SRS to deploy when the deployment conditions are met.
These DTCs are recorded when a malfunction is detected in the driver side knee airbag squib circuit.

DTC No.
DTC Detection Condition
Trouble Area
B1860/64
Center airbag sensor detects line short signal 5 times in driver side knee airbag squib circuit during primary check.
  1. Instrument panel wire
  2. Driver side knee airbag (Driver side knee airbag squib)
  3. Center airbag sensor
B1861/64
Center airbag sensor detects open signal in driver side knee airbag squib circuit for 2 seconds.
  1. Instrument panel wire
  2. Driver side knee airbag (Driver side knee airbag squib)
  3. Center airbag sensor
B1862/64
Center airbag sensor detects short to ground signal in knee airbag (D side) squib circuit for 0.5 seconds.
  1. Instrument panel wire
  2. Driver side knee airbag (Driver side knee airbag squib)
  3. Center airbag sensor
B1863/64
Center airbag sensor detects short to B+ signal in knee airbag (D side) squib circuit for 0.5 seconds.
  1. Instrument panel wire
  2. Driver side knee airbag (Driver side knee airbag squib)
  3. Center airbag sensor

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1860/64 Short In Driver Side Knee Airbag Squib Circuit


INSPECTION PROCEDURE

HINT:
  1. Perform the simulation method by selecting the "Check Mode" (signal check) with the intelligent tester (RAV4_ACA30 RM000000XFF05JX.html).
  2. After selecting the "Check Mode" (signal check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city or rough road (RAV4_ACA30 RM000000XFF05JX.html).
1.CHECK DRIVER SIDE KNEE AIRBAG ASSEMBLY (DRIVER SIDE KNEE AIRBAG SQUIB)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1860/64 Short In Driver Side Knee Airbag Squib Circuit

  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 connector from the driver side knee airbag.

  1. Connect SST (resistance 2.1 Ω) to connector C.

    CAUTION:
    Never connect a tester to the driver side knee airbag (drive side knee airbag squib) 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.
    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 (IG), and wait for at least 60 seconds.

  1. Clear the DTCs (RAV4_ACA30 RM000000XFE06SX.html).

  1. Turn the ignition switch off.

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

  1. Check the DTCs (RAV4_ACA30 RM000000XFE06SX.html).

    OK:
    DTC B1860, B1861, B1862, B1863 and 64 are not output.
    HINT:
    DTCs other than DTC B1860, B1861, B1862, B1863 and 64 may be output at this time, but they are not related to this check.


OK
REPLACE DRIVER SIDE KNEE AIRBAG ASSEMBLY
NG


2.CHECK CONNECTOR

  1. Turn the ignition switch off.

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

  1. Disconnect SST from connector C.

  1. Check that the instrument panel wire connector (on the driver side knee airbag side) is not damaged.

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


NG
REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK


3.CHECK INSTRUMENT PANEL WIRE (DRIVER SIDE KNEE AIRBAG SQUIB CIRCUIT)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1860/64 Short In Driver Side Knee Airbag Squib Circuit

  1. Disconnect the connectors from the center airbag sensor.

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

  1. Turn the ignition switch on (IG).

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

    Standard voltage:
    Tester Connection
    		Specified Condition
    E39-1 (DK+) - Body ground
    		Below 1 V
    E39-2 (DK-) - Body ground
    		Below 1 V

  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
    E39-1 (DK+) - E39-2 (DK-)
    		Below 1 Ω
    E39-1 (DK+) - Body ground
    		1 MΩ or higher
    E39-2 (DK-) - Body ground
    		1 MΩ or higher

  1. Release the activation prevention mechanism built into connector B (RAV4_ACA30 RM000000XFD06JX.html).

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    E39-1 (DK+) - E39-2 (DK-)
    		1 MΩ or higher


NG
REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK

REPLACE CENTER AIRBAG SENSOR ASSEMBLY