B1823

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


DESCRIPTION

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

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

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





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
- Perform the simulation method by selecting "check mode" (signal check) with the Techstream Check Mode Procedure.
- After selecting "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 Diagnosis System.

PROCEDURE

1. CHECK FRONT SEAT SIDE AIRBAG LH (SIDE SQUIB LH)





(a) Turn the ignition switch OFF.

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

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

(d) Connect the red wire side of SST (resistance: 2.1 Ohms) to connector C.

CAUTION:
Never connect the tester to the front seat side airbag LH (side squib LH) 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 SST.
- Insert SST straight into the terminals of the connector.

SST : 09843-18061

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

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

(j) Check for DTCs DTC Check / Clear.

Result





HINT
Codes other than DTC B1820, B1821, B1822, B1823 maybe output at this time, but they are not related to this check.

B -- REPLACE FRONT SEAT SIDE AIRBAG ASSEMBLY LH Removal

A -- REPLACE FRONT SEAT SIDE AIRBAG ASSEMBLY LH Removal
C -- Continue to next step.

2. CHECK FLOOR WIRE (SIDE SQUIB LH CIRCUIT)





(a) Turn the ignition switch OFF.

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

(c) Disconnect SST from connector C.

(d) Disconnect the connectors from the center airbag sensor.

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

(f) Turn the ignition switch ON.

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

Standard voltage:





(h) Turn the ignition switch OFF.

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

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

Standard resistance:





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

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

Standard resistance:





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

3. CHECK CENTER AIRBAG SENSOR





(a) Connect the connectors to the front seat side airbag LH and the center airbag sensor.

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

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

(d) Clear the DTCs DTC Check / Clear.

(e) Turn the ignition switch OFF.

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

(g) Check for DTCs DTC Check / Clear.

Result





HINT
Codes other than DTC B1820, B1821, B1822, B1823 maybe output at this time, but they are not related to this check.

B -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

A -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

C -- USE SIMULATION METHOD TO CHECK Diagnosis System