AIRBAG SYSTEM, Diagnostic DTC:B1800/51, B1801/51, B1802/51, B1803/51

DESCRIPTION

• The driver side squib 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.

• These DTCs are recorded when a malfunction is detected in the driver side squib circuit.

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   CHECK CONNECTORS

   
   
   1. 

      Turn the ignition switch off.

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

   3. Check that the connectors are properly connected to the steering pad, spiral cable and center airbag sensor assembly.

      OK
      The connectors are properly connected.

      Tip:

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

   4. Disconnect the connectors from the steering pad, spiral cable and center airbag sensor assembly.

   5. Check that the connector terminals are not damaged.

      OK
      The terminals are not deformed or damaged.

   6. Check that the spiral cable connector (on the steering pad side) is not damaged.

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

   
   
   • OKClick here
   • NGClick here
2. Click here

   CHECK STEERING PAD (DRIVER SIDE SQUIB)

   
   
   1. 

      Connect the instrument panel wire to the center airbag sensor assembly and spiral cable.

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

      CAUTION:

      Never connect the tester to the steering pad (driver 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.

      • Insert SST straight into the terminals of the connector.

      09843-18061

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

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

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

   6. Turn the ignition switch off.

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

   8. Check for DTCs (Click here).

      OK
      DTC B1800, B1801, B1802, B1803, or 51 is not output.

      Tip:

      Codes other than DTC B1800, B1801, B1802, B1803, and 51 may be output at this time, but they are not related to this check.

   
   
   • OKClick here
   • NGClick here
3. Click here

   REPLACE STEERING PADClick here

4. Click here

   CHECK DRIVER SIDE SQUIB CIRCUIT

   
   
   1. 

      Turn the ignition switch off.

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

   3. Disconnect SST from connector E.

   4. Disconnect the instrument panel wire from the center airbag sensor assembly.

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

      
      

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

      2. Turn the ignition switch on (IG).

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

         Standard voltage
         Tester Connection Switch Condition Specified Condition z3-1 (D-) - Body ground Ignition switch on (IG) Below 1 V z3-2 (D+) - Body ground Ignition switch on (IG) Below 1 V

   6. Check for an open in the circuit.

      
      

      1. Turn the ignition switch off.

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

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

         Standard resistance
         Tester Connection Switch Condition Specified Condition z3-1 (D-) - z3-2 (D+) Always Below 1 Ω

   7. 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 Switch Condition Specified Condition z3-1 (D-) - Body ground Always 1 MΩ or higher z3-2 (D+) - Body ground Always 1 MΩ or higher

   8. Check for a short in the circuit.

      
      

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

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

         Standard resistance
         Tester Connection Switch Condition Specified Condition z3-1 (D-) - z3-2 (D+) Always 1 MΩ or higher

   
   
   • OKClick here
   • NGClick here
5. Click here

   CHECK CENTER AIRBAG SENSOR ASSEMBLY

   
   
   1. 

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

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

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

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

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

   6. Turn the ignition switch off.

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

   8. Check for DTCs (Click here).

      OK
      DTC B1800, B1801, B1802, B1803, or 51 is not output.

      Tip:

      Codes other than DTC B1800, B1801, B1802, B1803, and 51 may be output at this time, but they are not related to this check.

   
   
   • OKClick here
   • NGClick here
6. Click here

   CHECK INSTRUMENT PANEL WIRE

   
   
   1. 

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

   2. Disconnect the instrument panel wire from the spiral cable.

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

      
      

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

      2. Turn the ignition switch on (IG).

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

         Standard voltage
         Tester Connection Switch Condition Specified Condition D52-1 (D+) - Body ground Ignition switch on (IG) Below 1 V D52-2 (D-) - Body ground Ignition switch on (IG) Below 1 V

   4. Check for an open in the circuit.

      
      

      1. Turn the ignition switch off.

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

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

         Standard resistance
         Tester Connection Switch Condition Specified Condition D52-1 (D+) - D52-2 (D-) Always Below 1 Ω

   5. 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 Switch Condition Specified Condition D52-1 (D+) - Body ground Always 1 MΩ or higher D52-2 (D-) - Body ground Always 1 MΩ or higher

   6. Check for a short in the circuit.

      
      

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

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

         Standard resistance
         Tester Connection Switch Condition Specified Condition D52-1 (D+) - D52-2 (D-) Always 1 MΩ or higher

   
   
   • OKClick here
   • NGClick here
7. Click here

   CHECK SPIRAL CABLE

   
   
   1. 

      Check for a short to B+ in the circuit.

      
      

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

      2. Turn the ignition switch on (IG).

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

         Standard voltage
         Tester Connection Switch Condition Specified Condition z3-1 (D-) - Body ground Ignition switch on (IG) Below 1 V z3-2 (D+) - Body ground Ignition switch on (IG) Below 1 V

   2. Check for an open in the circuit.

      
      

      1. Turn the ignition switch off.

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

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

         Standard resistance
         Tester Connection Switch Condition Specified Condition z3-1 (D-) - z3-2 (D+) 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 Switch Condition Specified Condition z3-1 (D-) - Body ground Always 1 MΩ or higher z3-2 (D+) - 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 here).

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

         Standard resistance
         Tester Connection Switch Condition Specified Condition z3-1 (D-) - z3-2 (D+) Always 1 MΩ or higher

   
   
   • OKClick here
   • NGClick here
8. Click here

   REPLACE WIRE HARNESS

9. Click here

   REPLACE CENTER AIRBAG SENSOR ASSEMBLYClick here

10. Click here

    USE SIMULATION METHOD TO CHECKClick here

11. Click here

    REPLACE INSTRUMENT PANEL WIRE

12. Click here

    REPLACE SPIRAL CABLEClick here