Dtc B1800/51 Short In Driver Side Squib Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK STEERING PAD (DRIVER SIDE SQUIB)

CHECK CONNECTOR

CHECK DRIVER SIDE SQUIB CIRCUIT

CHECK CENTER AIRBAG SENSOR ASSEMBLY

CHECK INSTRUMENT PANEL WIRE

CHECK SPIRAL CABLE

DESCRIPTION

1. The driver side squib circuit consists of the center airbag sensor assembly, the spiral cable and the steering pad.
   
2. The circuit instructs the SRS to deploy when deployment conditions are met.
   
3. These DTCs are recorded when a malfunction is detected in the driver side squib circuit.
   

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

1. Perform the simulation method by selecting the "check mode" (signal check) with the intelligent tester (CAMRY_ACV40 RM000000XFF00YX.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 (CAMRY_ACV40 RM000000XFF00YX.html).
   

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 steering pad.
   

4. Connect the white wire side of 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.

   NOTICE:

   1. Do not forcibly insert the SST into the terminals of the connector when connecting.
      
   2. Insert straight the SST into the terminals of the connector.
      

SST

09843-18061

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

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

7. Clear the DTCs stored in the memory (CAMRY_ACV40 RM000000XFE059X.html).
   

8. Turn the ignition switch to the LOCK position.
   

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

10. Check the DTCs (CAMRY_ACV40 RM000000XFE059X.html).
    

    OK:

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

    HINT:

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

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 from connector E.
   

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

   OK:

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

1. Disconnect the connectors from the center airbag sensor assembly.
   

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

   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.
      

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

      Standard voltage:

      Tester Connection	Condition	Specified Condition
      D+ - Body ground	Ignition switch ON	Below 1 V
      D- - Body ground	Ignition switch ON	Below 1 V

3. Check for an open in the circuit.
   

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

      Standard resistance:

      Tester Connection	Condition	Specified Condition
      D+ - D-	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
      D+ - Body ground	Always	1 MΩ or higher
      D- - 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 (CAMRY_ACV40 RM000000XFD050X.html).
      

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

      Standard resistance:

      Tester Connection	Condition	Specified Condition
      D+ - D-	Always	1 MΩ or higher

1. Connect the connectors to the steering pad 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 the memory (CAMRY_ACV40 RM000000XFE059X.html).
   

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 (CAMRY_ACV40 RM000000XFE059X.html).
   

   OK:

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

   HINT:

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

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

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

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

   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.
      

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

      Standard voltage:

      Tester Connection	Condition	Specified Condition
      E16-1 (D+) - Body ground	Ignition switch ON	Below 1 V
      E16-2 (D-) - Body ground	Ignition switch ON	Below 1 V

4. Check for an open in the circuit.
   

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

      Standard resistance:

      Tester Connection	Condition	Specified Condition
      E16-1 (D+) - E16-2 (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	Condition	Specified Condition
      E16-1 (D+) - Body ground	Always	1 MΩ or higher
      E16-2 (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 (CAMRY_ACV40 RM000000XFD050X.html).
      

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

      Standard resistance:

      Tester Connection	Condition	Specified Condition
      E16-1 (D+) - E16-2 (D-)	Always	1 MΩ or higher

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

   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.
      

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

      Standard voltage:

      Tester Connection	Condition	Specified Condition
      D+ - Body ground	Ignition switch ON	Below 1 V
      D- - Body ground	Ignition switch ON	Below 1 V

2. Check for an open in the circuit.
   

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

      Standard resistance:

      Tester Connection	Condition	Specified Condition
      D+ - 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	Condition	Specified Condition
      D+ - Body ground	Always	1 MΩ or higher
      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 (CAMRY_ACV40 RM000000XFD050X.html).
      

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

      Standard resistance:

      Tester Connection	Condition	Specified Condition
      D+ - D-	Always	1 MΩ or higher