AIRBAG SYSTEM, Diagnostic DTC:B1805/52,B1806/52,B1807/52 and B1808/52

DESCRIPTION

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK CONNECTORS

   1. 

      *1	Instrument Panel Passenger Airbag Assembly
      *2	Airbag Sensor Assembly
      *3	No. 2 Instrument Panel Wire
      *4	Instrument Panel Wire

      Turn the ignition switch off.

   2. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

   3. Check that the connectors are properly connected to the instrument panel passenger airbag assembly and airbag sensor assembly. Also check that the connectors that link the instrument panel wire and No. 2 instrument panel wire are properly connected.

      OK

      The connectors are properly connected.

      Tip:

      If the connectors are not properly connected, reconnect the connectors and proceed to the next inspection.

   4. Disconnect the connectors from the instrument panel passenger airbag assembly and airbag sensor assembly. Also disconnect the instrument panel wire from the No. 2 instrument panel wire.

   5. Check that the terminals of connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

   6. Check that the No. 2 instrument panel wire connector (on the instrument panel passenger airbag assembly side) is not damaged.

      OK

      The connector locking button is not disengaged, or the claw of the lock is not deformed or damaged.

   7. Check that the short springs for the instrument panel wire and No. 2 instrument panel wire with the activation prevention mechanism are not deformed or damaged.

      OK

      The short springs are not deformed or damaged.

   Result

   Proceed to
   OK
   NG

   NG

   REPLACE WIRE HARNESS

   OK

2. CHECK INSTRUMENT PANEL PASSENGER AIRBAG ASSEMBLY (FRONT PASSENGER SIDE SQUIB)

   1. 

      *1	Instrument Panel Passenger Airbag Assembly
      *2	Airbag Sensor Assembly
      *a	Front view of wire harness connector (to Instrument Panel Passenger Airbag Assembly)

      Connect the instrument panel wire to the No. 2 instrument panel wire and airbag sensor assembly.

   2. Connect SST (resistance 2.1 Ω) to connector E.

      CAUTION:

      Never connect a tester to the instrument panel passenger airbag assembly (front passenger side squib) for measurement, as this may lead to a serious injury due to airbag deployment.

      Note:

      • Do not forcibly insert SST into the terminals of the connector when connecting it.

      • Insert SST straight into the terminals of the connector.

   3. Connect the cable to the negative (-) battery terminal.

   4. Clear the DTCs stored in memory.

      Click here

      Body Electrical > SRS Airbag > Clear DTCs

   5. Turn the ignition switch off.

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

   7. Check for DTCs.

      Click here

      Body Electrical > SRS Airbag > Trouble Codes

      OK

      DTC B1805/52, B1806/52, B1807/52 or B1808/52 is not output.

      Tip:

      Codes other than DTCs B1805/52, B1806/52, B1807/52 and B1808/52 may be output at this time, but they are not related to this check.

   8. Turn the ignition switch off.

   9. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

   10. Disconnect SST from connector E.

   09843-18061

   Result

   Proceed to
   OK
   NG

   OK

   REPLACE INSTRUMENT PANEL PASSENGER AIRBAG ASSEMBLY

   Click hereClick hereClick hereClick here

   NG

3. CHECK FRONT PASSENGER SIDE SQUIB CIRCUIT

   1. 

      *1	Instrument Panel Passenger Airbag Assembly
      *2	Airbag Sensor Assembly
      *a	Front view of wire harness connector (to Instrument Panel Passenger Airbag Assembly)

      Disconnect the instrument panel wire from the airbag sensor assembly.

   2. Check for a short to B+ in the circuit.

      1. Connect the cable to the negative (-) battery terminal.

      2. Turn the ignition switch to ON.

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

         Standard Voltage

         Tester Connection	Condition	Specified Condition
         d1-2 (P+) - Body ground	Ignition switch ON	Below 1 V
         d1-1 (P-) - Body ground	Ignition switch ON	Below 1 V

      4. Turn the ignition switch off.

      5. Disconnect the cable from the negative (-) battery terminal.

         CAUTION:

         Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

   3. Check for an open in the circuit.

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

         Standard Resistance

         Tester Connection	Condition	Specified Condition
         d1-2 (P+) - d1-1 (P-)	Always	Below 1 Ω

   4. Check for a short to ground in the circuit.

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

         Standard Resistance

         Tester Connection	Condition	Specified Condition
         d1-2 (P+) - Body ground	Always	1 MΩ or higher
         d1-1 (P-) - Body ground	Always	1 MΩ or higher

   5. Check for a short in the circuit.

      1. Release the activation prevention mechanism built into connector B.

         Click hereClick hereClick hereClick here

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

         Standard Resistance

         Tester Connection	Condition	Specified Condition
         d1-2 (P+) - d1-1 (P-)	Always	1 MΩ or higher

      3. Restore the released activation prevention mechanism of connector B to the original condition.

   Result

   Proceed to
   OK
   NG

   NG

   CHECK INSTRUMENT PANEL WIREClick here

   OK

4. CHECK DTC

   1. 

      *1	Instrument Panel Passenger Airbag Assembly
      *2	Airbag Sensor Assembly

      Connect the connectors to the instrument panel passenger airbag assembly and airbag sensor assembly.

   2. Connect the cable to the negative (-) battery terminal.

   3. Clear the DTCs stored in memory.

      Click here

      Body Electrical > SRS Airbag > Clear DTCs

   4. Turn the ignition switch off.

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

   6. Check for DTCs.

      Click here

      Body Electrical > SRS Airbag > Trouble Codes

      OK

      DTC B1805/52, B1806/52, B1807/52 or B1808/52 is not output.

      Tip:

      Codes other than DTCs B1805/52, B1806/52, B1807/52 and B1808/52 may be output at this time, but they are not related to this check.

   Result

   Proceed to
   OK
   NG

   OK

   USE SIMULATION METHOD TO CHECK

   Click hereClick hereClick hereClick hereClick hereClick hereClick here

   NG

   REPLACE AIRBAG SENSOR ASSEMBLY

   Click hereClick here

5. CHECK INSTRUMENT PANEL WIRE

   1. 

      *1	Instrument Panel Passenger Airbag Assembly
      *2	Airbag Sensor Assembly
      *3	No. 2 Instrument Panel Wire
      *4	Instrument Panel Wire
      *a	Front view of wire harness connector (to No. 2 Instrument Panel Wire)

      Disconnect the No. 2 instrument panel wire from the instrument panel wire.

   2. Check for a short to B+ in the circuit.

      1. Connect the cable to the negative (-) battery terminal.

      2. Turn the ignition switch to ON.

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

         Standard Voltage

         Tester Connection	Condition	Specified Condition
         Ed1-1 (P+) - Body ground	Ignition switch ON	Below 1 V
         Ed1-2 (P-) - Body ground	Ignition switch ON	Below 1 V

      4. Turn the ignition switch off.

      5. Disconnect the cable from the negative (-) battery terminal.

         CAUTION:

         Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

   3. Check for an open in the circuit.

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

         Standard Resistance

         Tester Connection	Condition	Specified Condition
         Ed1-1 (P+) - Ed1-2 (P-)	Always	Below 1 Ω

   4. Check for a short to ground in the circuit.

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

         Standard Resistance

         Tester Connection	Condition	Specified Condition
         Ed1-1 (P+) - Body ground	Always	1 MΩ or higher
         Ed1-2 (P-) - Body ground	Always	1 MΩ or higher

   5. Check for a short in the circuit.

      1. Release the activation prevention mechanism built into connector B.

         Click hereClick hereClick hereClick here

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

         Standard Resistance

         Tester Connection	Condition	Specified Condition
         Ed1-1 (P+) - Ed1-2 (P-)	Always	1 MΩ or higher

      3. Restore the released activation prevention mechanism of connector B to the original condition.

   Result

   Proceed to
   OK
   NG

   NG

   REPLACE INSTRUMENT PANEL WIRE

   OK

6. CHECK NO. 2 INSTRUMENT PANEL WIRE

   1. 

      *1	Instrument Panel Passenger Airbag Assembly
      *2	Airbag Sensor Assembly
      *3	No. 2 Instrument Panel Wire
      *4	Instrument Panel Wire
      *a	Front view of wire harness connector (to Instrument Panel Passenger Airbag Assembly)

      Check for a short to B+ in the circuit.

      1. Connect the cable to the negative (-) battery terminal.

      2. Turn the ignition switch to ON.

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

         Standard Voltage

         Tester Connection	Condition	Specified Condition
         d1-2 (P+) - Body ground	Ignition switch ON	Below 1 V
         d1-1 (P-) - Body ground	Ignition switch ON	Below 1 V

      4. Turn the ignition switch off.

      5. Disconnect the cable from the negative (-) battery terminal.

         CAUTION:

         Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

   2. Check for an open in the circuit.

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

         Standard Resistance

         Tester Connection	Condition	Specified Condition
         d1-2 (P+) - d1-1 (P-)	Always	Below 1 Ω

   3. Check for a short to ground in the circuit.

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

         Standard Resistance

         Tester Connection	Condition	Specified Condition
         d1-2 (P+) - Body ground	Always	1 MΩ or higher
         d1-1 (P-) - Body ground	Always	1 MΩ or higher

   4. Check for a short in the circuit.

      1. Release the activation prevention mechanism built into connector D.

         Click hereClick hereClick hereClick here

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

         Standard Resistance

         Tester Connection	Condition	Specified Condition
         d1-2 (P+) - d1-1 (P-)	Always	1 MΩ or higher

      3. Restore the released activation prevention mechanism of connector D to the original condition.

   Result

   Proceed to
   OK
   NG

   OK

   USE SIMULATION METHOD TO CHECK

   Click hereClick hereClick hereClick hereClick hereClick hereClick here

   NG

   REPLACE NO. 2 INSTRUMENT PANEL WIRE