Toyota RAV4 manuals

Toyota Sienna Service Manual: Short in Rear Curtain Shield Squib LH Circuit

DTC B1635/87 Short in Rear Curtain Shield Squib LH Circuit

DESCRIPTION

The rear curtain shield squib LH circuit consists of the center airbag sensor assembly and the curtain shield airbag assembly LH.

The circuit instructs the SRS to deploy when deployment conditions are met.

DTC B1635/87 is recorded when a short circuit is detected in the rear curtain shield squib LH circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B1635/87

  • Short circuit between ICL+ wire harness and ICLwire harness of rear curtain shield squib LH
  •  Rear curtain shield squib LH malfunction
  •  Center airbag sensor assembly malfunction
  • Curtain shield airbag assembly LH (Rear curtain shield squib LH)
  • Center airbag sensor assembly
  • Floor wire

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

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

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

  1. Turn the ignition switch to the LOCK position.
  2.  Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
  3.  Disconnect the connectors from the curtain shield airbag assembly LH.
  4.  Connect the white wire side of SST (resistance 2.1 Ω) to the floor wire.

CAUTION: Never connect a tester to the curtain shield airbag assembly LH (Rear curtain shield squib LH) for measurement, as this may lead to a serious injury due to airbag deployment.

NOTICE: Do not forcibly insert the SST into the terminals of the connector when connecting.

Insert the SST straight into the terminals of the connector.

SST 09843-18060

  1.  Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
  2.  Turn the ignition switch to the ON position, and wait for at least 60 seconds.
  3.  Clear the DTCs stored in memory (5).
  4.  Turn the ignition switch to the LOCK position.
  5.  Turn the ignition switch to the ON position, and wait for at least 60 seconds.
  6.  Check the DTCs (5).

OK: DTC B1635/87 is not output. HINT: Codes other than DTC B1635/87 may be output at this time, but they are not related to this check.

Go to step 2

REPLACE CURTAIN SHIELD AIRBAG ASSEMBLY LH

2 CHECK CONNECTORS

  1. Turn the ignition switch to the LOCK position.
  2.  Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
  3.  Disconnect the SST (resistance 2.1 Ω) from the floor wire.
  4. Check that the floor wire connectors (on the curtain shield airbag assembly LH side) are not damaged.

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

REPAIR OR REPLACE FLOOR WIRE

3 CHECK FLOOR WIRE (REAR CURTAIN SHIELD SQUIB LH CIRCUIT)

CHECK FLOOR WIRE (REAR CURTAIN SHIELD SQUIB LH CIRCUIT)

  1. Disconnect the connector from the center airbag sensor assembly.
  2.  Release the activation prevention mechanism built into connector "B" (7).
  3.  Measure the resistance according to the value(s) in the table below.

Resistance

Resistance

REPAIR OR REPLACE FLOOR WIRE

4 CHECK CENTER AIRBAG SENSOR ASSEMBLY

CHECK CENTER AIRBAG SENSOR ASSEMBLY

  1. Connect the connectors to the curtain shield airbag assembly LH and the center airbag sensor assembly.
  2.  Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
  3.  Turn the ignition switch to the ON position, and wait for at least 60 seconds.
  4.  Clear the DTCs stored in memory (5).
  5.  Turn the ignition switch to the LOCK position.
  6.  Turn the ignition switch to the ON position, and wait for at least 60 seconds.
  7.  Check the DTCs (5).

OK: DTC B1635/87 is not output. HINT: Codes other than DTC B1635/87 may be output at this time, but they are not related to this check.

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

USE SIMULATION METHOD TO CHECK

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Other materials:

Initialization
1. RESET  When the battery is reconnected: The back door is locked and therefore cannot be opened. Therefore, it is necessary to unlock the back door using the door control switch or transmitter switch.  Reset the power back door system: The power back door ECU records the ...

Installation
1. INSTALL FRONT SEAT ASSEMBLY RH  Place the seat assembly in the cabin. NOTICE: Be careful not to damage the body.  Connect the connectors under the seat assembly.  Tighten the 2 bolts on the front side of the seat assembly. Torque: 37 N*m (375 kgf*cm, 27 ft.*lbf) ...

Removal
1. Remove windshield wiper motor assembly hint: (see page ww-4) 2. Remove front outer cowl top panel subassembly (see page em-27) 3. Drain engine coolant (see page co-6) 4. Remove v-bank cover sub-assembly (see page em-28) 5. Remove no. 2 Air cleaner inlet (see page em- 28) 6. Remove no. 1 ...

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