DTC 55

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1820/55-B1823/55: Short in Front Driver Side - Side Squib Circuit
B1823/55 - Short to B+ in Front Driver Side - Side Squib Circuit

DESCRIPTION

The driver side - side squib circuit consists of the center airbag sensor and the front seat side airbag LH.

This circuit instructs the SRS to deploy when the deployment conditions are met.

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





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
* Perform the simulation method by selecting the "CHECK MODE" (signal check) with the Techstream Check Mode Procedure.
* After selecting the "CHECK MODE" (signal check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on various types of roads Check Mode Procedure.

PROCEDURE

1. CHECK FRONT SEAT SIDE AIRBAG ASSEMBLY LH (DRIVER SIDE - SIDE SQUIB)





(a) Turn the ignition switch off.

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

(c) Disconnect the connector from the front seat side airbag LH.

(d) Connect SST (resistance 2.1 Ohms) to connector C.

CAUTION:
Never connect a tester to the front seat side airbag LH (driver side - side squib) for measurement, as this may lead to a serious injury due to airbag deployment.

NOTICE:
* Do not forcibly insert SST into the terminals of the connector when connecting.
* Insert SST straight into the terminals of the connector.

SST : 09843-18061

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

(f) Turn the ignition switch to ON, and wait for at least 60 seconds.

(g) Clear the DTCs DTC Check / Clear.

(h) Turn the ignition switch off.

(i) Turn the ignition switch to ON, and wait for at least 60 seconds.

(j) Check the DTCs DTC Check / Clear.

OK:

DTC B1820, B1821, B1822, B1823 or 55 is not output.

HINT
DTCs other than DTC B1820, B1821, B1822, B1823 or 55 may be output at this time, but they are not related to this check.

OK -- REPLACE FRONT SEAT SIDE AIRBAG ASSEMBLY LH
NG -- Continue to next step.

2. CHECK CONNECTOR

(a) Turn the ignition switch off.

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

(c) Disconnect SST from connector C.

(d) Check that the floor wire connectors (on the driver side - side squib) are not damaged.

OK:

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

NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.

3. CHECK FLOOR WIRE (DRIVER SIDE - SIDE SQUIB CIRCUIT)





(a) Disconnect the connector from the center airbag sensor.

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

(c) Turn the ignition switch to ON.

(d) Measure the voltage of the wire harness side connector.

Standard voltage:





(e) Turn the ignition switch off.

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

(g) Measure the resistance of the wire harness side connector.

Standard resistance:





(h) Release the activation prevention mechanism built into connector B Diagnosis System.

(i) Measure the resistance of the wire harness side connector.

Standard resistance:





NG -- REPAIR OR REPLACE FLOOR WIRE

OK -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY