GSIC - Global Service Information Center

### DTC B1805/52 Short in Front Passenger Side Squib Circuit

### DTC B1806/52 Open in Front Passenger Side Squib Circuit

### DTC B1807/52 Short to GND in Front Passenger Side Squib Circuit

### DTC B1808/52 Short to B+ in Front Passenger Side Squib Circuit

## for Preparation Click here

## SYSTEM DESCRIPTION

The front passenger side squib circuit consists of the center airbag sensor and front passenger airbag. The circuit instructs the SRS to deploy when deployment conditions are met. These DTCs are recorded when a malfunction is detected in the front passenger side squib circuit.

DTC No. | DTC Detection Condition | Trouble Area

B1805/52

Center airbag sensor assembly receives line short circuit signal 5 times in passenger squib circuit during primary check

1. Front passenger airbag assembly (Passenger squib)
2. Center airbag sensor assembly
3. Instrument panel wire

B1806/52

Center airbag sensor assembly receives open circuit signal in passenger squib circuit for 2 seconds

1. Front passenger airbag assembly (Passenger squib)
2. Center airbag sensor assembly
3. Instrument panel wire

B1807/52

Center airbag sensor assembly receives short circuit to ground signal in passenger squib circuit for 0.5 seconds

1. Front passenger airbag assembly (Passenger squib)
2. Center airbag sensor assembly
3. Instrument panel wire

B1808/52

Center airbag sensor assembly receives B+ short circuit signal in passenger squib circuit for 0.5 seconds

1. Front passenger airbag assembly (Passenger squib)
2. Center airbag sensor assembly
3. Instrument panel wire

## WIRING DIAGRAM

## INSPECTION PROCEDURE

1.CHECK FOR DTC

1. Proceed to each step according to DTC readings.

   1. If using the intelligent tester (read the 5 digit DTC):
      Check for DTCs (Click here).

      Result:
      Result | Proceed to
      DTC B1805 is output | A
      DTC B1806 is output | B
      DTC B1807 is output | C
      DTC B1808 is output | D

   2. If not using the intelligent tester (read the 2 digit DTC):
      Check for DTC (Click here).

      Result:
      Result | Proceed to
      DTC 52 is output | E

| B |

Go to step 4

| C |

Go to step 5

| D |

Go to step 6

| E |

Go to step 7

A |

2.CHECK CONNECTOR

1. Turn the ignition switch OFF.

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

1. Check that the instrument panel wire connectors (on the front passenger side airbag) are not damaged.

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

| NG |

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

OK |

3.CHECK INSTRUMENT PANEL WIRE (SHORT)

1. Disconnect the connectors from the center airbag sensor and front passenger airbag.

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

1. Measure the resistance of the wire harness side connector.

   Standard resistance:

     Tester Connection | Specified Condition
     A23-1 (P+) - A23-2 (P-) | 1 MΩ or higher

| NG |

Go to step 13

| OK |

Go to step 10

4.CHECK INSTRUMENT PANEL WIRE (OPEN)

1. Disconnect the connectors from the center airbag sensor and front passenger airbag.

1. Measure the resistance of the wire harness side connector.

   Standard resistance:

     Tester Connection | Specified Condition
     A23-1 (P+) - A23-2 (P-) | Below 1 Ω

| NG |

Go to step 15

| OK |

Go to step 11

5.CHECK INSTRUMENT PANEL WIRE (TO GROUND)

1. Disconnect the connectors from the center airbag sensor and front passenger airbag.

1. Measure the resistance of the wire harness side connector.

   Standard resistance:

     Tester Connection | Specified Condition
     A23-1 (P+) - Body ground | 1 MΩ or higher
     A23-2 (P-) - Body ground | 1 MΩ or higher

| NG |

Go to step 17

| OK |

Go to step 11

6.CHECK INSTRUMENT PANEL WIRE (TO B+)

1. Disconnect the connectors from the center airbag sensor and front passenger airbag.

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

1. Turn the ignition switch ON.

1. Measure the voltage of the wire harness side connector.

   Standard voltage:

     Tester Connection | Specified Condition
     A23-1 (P+) - Body ground | Below 1 V
     A23-2 (P-) - Body ground | Below 1 V

   Before proceeding to the next step, perform the following procedures.

   1. Turn the ignition switch OFF.

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

| NG |

Go to step 19

| OK |

Go to step 11

7.CHECK CONNECTOR

1. Check that the instrument panel wire connectors (on the front passenger airbag side) are not damaged.

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

| NG |

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

OK |

8.CHECK INSTRUMENT PANEL WIRE (PASSENGER SQUIB CIRCUIT)

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

1. Turn the ignition switch ON.

1. Measure the voltage of the wire harness side connector.

   Standard voltage:

     Tester Connection | Specified Condition
     A23-1 (P+) - Body ground | Below 1 V
     A23-2 (P-) - Body ground | Below 1 V

1. Turn the ignition switch OFF.

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

1. Measure the resistance of the wire harness side connector.

   Standard resistance:

     Tester Connection | Specified Condition
     A23-1 (P+) - A23-2 (P-) | Below 1 Ω
     A23-1 (P+) - Body ground | 1 MΩ or higher
     A23-2 (P-) - Body ground | 1 MΩ or higher

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

1. Measure the resistance of the wire harness side connector.

   Standard resistance:

     Tester Connection | Specified Condition
     A23-1 (P+) - A23-2 (P-) | 1 MΩ or higher

| NG |

Go to step 21

OK |

9.REPLACE FRONT PASSENGER AIRBAG ASSEMBLY (PASSENGER SQUIB)

1. Replace the front passenger airbag (Click here).

1. Connect the connectors to the center airbag sensor.

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

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

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

1. Turn the ignition switch OFF.

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

1. Check for DTCs (Click here).

   OK:
     DTC 52 is not output.

   HINT:
     DTCs other than DTC 52 may be output at this time, but they are not related to this check.

| NG |

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

OK |

END

10.CHECK CENTER AIRBAG SENSOR ASSEMBLY

1. Connect the connectors to the center airbag sensor.

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

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

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

1. Turn the ignition switch OFF.

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

1. Check for DTCs (Click here).

   OK:
     DTC B1805 is not output.

   HINT:
     DTCs other than DTC B1805 may be output at this time, but they are not related to this check.
   Before proceeding to the next step, perform the following procedures.

   1. Turn the ignition switch OFF.

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

| OK |

Go to step 12

NG |

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

11.CHECK CENTER AIRBAG SENSOR ASSEMBLY

1. Connect the connectors to the center airbag sensor.

1. Using a service wire, connect terminals A23-1 (P+) and A23-2 (P-) of connector E.

   NOTICE:
   1. Twist the end of the service wire in order to insert it into the connector.
   2. Do not forcibly insert the twisted service wire into the terminals of the connector.

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

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

1. Clear the DTCs (Click here).

1. Turn the ignition switch OFF.

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

1. Check for DTCs (Click here).

   OK:
     DTC B1806, B1807 or B1808 is not output.

   HINT:
     DTCs other than DTC B1806, B1807 or B1808 may be output at this time, but they are not related to this check.

| NG |

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

OK |

12.CHECK FRONT PASSENGER AIRBAG ASSEMBLY (PASSENGER SQUIB)

1. Disconnect the service wire from connector E.

1. Connect the connectors to the front passenger airbag.

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

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

1. Clear the DTCs (Click here).

1. Turn the ignition switch OFF.

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

1. Check for DTCs (Click here).

   OK:
     DTC B1805, B1806, B1807 or B1808 is not output.

   HINT:
     DTCs other than DTC B1805, B1806, B1807 or B1808 may be output at this time, but they are not related to this check.

| NG |

REPLACE FRONT PASSENGER AIRBAG ASSEMBLY

OK |

USE SIMULATION METHOD TO CHECK

13.CHECK INSTRUMENT PANEL WIRE (SHORT)

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

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

1. Measure the resistance of the wire harness side connector.

   Standard resistance:

     Tester Connection | Specified Condition
     IL1-1 - IL1-2 | 1 MΩ or higher

| NG |

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

OK |

14.CHECK NO. 2 INSTRUMENT PANEL WIRE (SHORT)

1. Measure the resistance of the wire harness side connector.

   Standard resistance:

     Tester Connection | Specified Condition
     A23-1 (P+) - A23-2 (P-) | 1 MΩ or higher

| NG |

REPAIR OR REPLACE NO. 2 INSTRUMENT PANEL WIRE

OK |

USE SIMULATION METHOD TO CHECK

15.CHECK INSTRUMENT PANEL WIRE (OPEN)

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

1. Measure the resistance of the wire harness side connector.

   Standard resistance:

     Tester Connection | Specified Condition
     IL1-1 - IL1-2 | Below 1 Ω

| NG |

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

OK |

16.CHECK NO. 2 INSTRUMENT PANEL WIRE (OPEN)

1. Measure the resistance of the wire harness side connectors.

   Standard resistance:

     Tester Connection | Specified Condition
     A23-1 (P+) - IL1-2 | Below 1 Ω
     A23-2 (P-) - IL1-1 | Below 1 Ω

| NG |

REPAIR OR REPLACE NO. 2 INSTRUMENT PANEL WIRE

OK |

USE SIMULATION METHOD TO CHECK

17.CHECK INSTRUMENT PANEL WIRE (TO GROUND)

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

1. Measure the resistance of the wire harness side connector.

   Standard resistance:

     Tester Connection | Specified Condition
     IL1-1 - Body ground | 1 MΩ or higher
     IL1-2 - Body ground | 1 MΩ or higher

| NG |

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

OK |

18.CHECK NO. 2 INSTRUMENT PANEL WIRE (TO GROUND)

1. Measure the resistance of the wire harness side connector.

   Standard resistance:

     Tester Connection | Specified Condition
     A23-1 (P+) - Body ground | 1 MΩ or higher
     A23-2 (P-) - Body ground | 1 MΩ or higher

| NG |

REPAIR OR REPLACE NO. 2 INSTRUMENT PANEL WIRE

OK |

USE SIMULATION METHOD TO CHECK

19.CHECK INSTRUMENT PANEL WIRE (TO B+)

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

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

1. Turn the ignition switch ON.

1. Measure the voltage of the wire harness side connector.

   Standard voltage:

     Tester Connection | Specified Condition
     IL1-1 - Body ground | Below 1 V
     IL1-2 - Body ground | Below 1 V

| NG |

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

OK |

20.CHECK NO. 2 INSTRUMENT PANEL WIRE (TO B+)

1. Measure the voltage of the wire harness side connector.

   Standard voltage:

     Tester Connection | Specified Condition
     A23-1 (P+) - Body ground | Below 1 V
     A23-2 (P-) - Body ground | Below 1 V

| NG |

REPAIR OR REPLACE NO. 2 INSTRUMENT PANEL WIRE

OK |

USE SIMULATION METHOD TO CHECK

21.CHECK INSTRUMENT PANEL WIRE

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

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

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

1. Turn the ignition switch ON.

1. Measure the voltage of the wire harness side connector.

   Standard voltage:

     Tester Connection | Specified Condition
     IL1-1 - Body ground | Below 1 V
     IL1-2 - Body ground | Below 1 V

1. Turn the ignition switch OFF.

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

1. Measure the resistance of the wire harness side connector.

   Standard resistance:

     Tester Connection | Specified Condition
     IL1-1 - IL1-2 | Below 1 Ω
     IL1-1 - Body ground | 1 MΩ or higher
     IL1-2 - Body ground | 1 MΩ or higher

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

1. Measure the resistance of the wire harness side connector.

   Standard resistance:

     Tester Connection | Specified Condition
     IL1-1 - IL1-2 | 1 MΩ or higher

| NG |

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

OK |

22.CHECK NO. 2 INSTRUMENT PANEL WIRE

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

1. Turn the ignition switch ON.

1. Measure the voltage of the wire harness side connector.

   Standard voltage:

     Tester Connection | Specified Condition
     A23-1 (P+) - Body ground | Below 1 V
     A23-2 (P-) - Body ground | Below 1 V

1. Turn the ignition switch OFF.

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

1. Measure the resistance of the wire harness side connector.

   Standard resistance:

     Tester Connection | Specified Condition
     A23-1 (P+) - IL1-2 | Below 1 Ω
     A23-2 (P-) - IL1-1 | Below 1 Ω
     A23-1 (P+) - Body ground | 1 MΩ or higher
     A23-2 (P-) - Body ground | 1 MΩ or higher

1. Measure the resistance of the wire harness side connector.

   Standard resistance:

     Tester Connection | Specified Condition
     A23-1 (P+) - A23-2 (P-) | 1 MΩ or higher

| NG |

REPAIR OR REPLACE NO. 2 INSTRUMENT PANEL WIRE

OK |

USE SIMULATION METHOD TO CHECK