RX400h · Service Manual RESTRAINTS

B1180/17

Diagnostic trouble codes

DESCRIPTION

The driver side squib 2nd step circuit consists of the center airbag sensor assembly, the spiral cable and the steering pad.
The circuit instructs the SRS to deploy when deployment conditions are met.
DTC B1180/17 is recorded when a short circuit is detected in the driver side squib 2nd step circuit.
DTC No.
 DTC Detecting Condition
 Trouble Area
B1180/17
  1. Short circuit between D2+ wire harness and D2- wire harness of driver side squib 2nd step
  2. Driver side squib 2nd step malfunction
  3. Spiral cable malfunction
  4. Center airbag sensor assembly malfunction
  1. Steering pad (Driver side squib 2nd step)
  2. Spiral cable
  3. Center airbag sensor assembly
  4. Instrument panel wire

WIRING DIAGRAM

C110382E06

INSPECTION PROCEDURE


1. CHECK STEERING PAD (DRIVER SIDE SQUIB 2ND STEP)

  1. C111690E01
    Turn the ignition switch to the LOCK position.

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

  1. Disconnect the connectors from the steering pad.

  1. Connect the white wire side of SST (resistance 2.1 Ω) to the spiral cable.

    CAUTION:
    Never connect a tester to the steering pad (Driver side squib 2nd step) 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.

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

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

  1. Turn the ignition switch to the LOCK position.

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

  1. Check the DTCs (Click here).

    OK:
    DTC B1180/17 is not output.

    HINT:
    Codes other than DTC B1180/17 may be output at this time, but they are not related to this check.



 NG
Go to step 2
OK

REPLACE STEERING PAD

2. CHECK CONNECTORS

  1. Turn the ignition switch to the LOCK position.

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

  1. Disconnect the SST (resistance 2.1 Ω) from the spiral cable.

  1. Check that the spiral cable connectors (on the steering pad side) are not damaged.

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



 NG
REPLACE SPIRAL CABLE
OK


3. CHECK DRIVER SIDE SQUIB 2ND STEP CIRCUIT

  1. C111719E01
    Disconnect the connector from the center airbag sensor assembly.

  1. Release the activation prevention mechanism built into connector "B" (Click here).

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

    Resistance:
    Tester connection
    		 Condition
    		 Specified condition
    D2+ - D2-
    		 Always
    		 1 MΩ or higher



NG
Go to step 5
OK


4. CHECK CENTER AIRBAG SENSOR ASSEMBLY

  1. H042137E02
    Connect the connectors to the steering pad and the center airbag sensor assembly.

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

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

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

  1. Turn the ignition switch to the LOCK position.

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

  1. Check the DTCs (Click here).

    OK:
    DTC B1180/17 is not output.

    HINT:
    Codes other than DTC B1180/17 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

5. CHECK INSTRUMENT PANEL WIRE

  1. C110388E10
    Disconnect the instrument panel wire connector from the spiral cable.

    HINT:
    The activation prevention mechanism of connector "B" has already been released.

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

    Resistance:
    Tester connection
    		 Condition
    		 Specified condition
    A26-4 (D2+) -
    A26-3 (D2-)
    		 Always
    		 1 MΩ or higher



NG
REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK


6. CHECK SPIRAL CABLE

  1. C111718E01
    Release the activation prevention mechanism built into connector "D" (Click here).

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

    Resistance:
    Tester connection
    		 Condition
    		 Specified condition
    D2+ - D2-
    		 Always
    		 1 MΩ or higher



NG
REPLACE SPIRAL CABLE
OK

USE SIMULATION METHOD TO CHECK


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