B1821

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

DESCRIPTION

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

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

These DTCs are stored when a malfunction is detected in the side squib RH circuit.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.

HINT
To perform the simulation method, enter check mode (signal check) with the Techstream Check Mode Procedure, and then wiggle each connector of the airbag system or drive the vehicle on various types of road Diagnosis System.

PROCEDURE

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

(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 RH.

(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 RH (side squib RH) 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 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 for DTCs DTC Check / Clear.

OK:

DTC B1820, B1821, B1822 or B1823 is output

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

Text in Illustration





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

2. CHECK FLOOR WIRE (SIDE SQUIB RH CIRCUIT)

(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) Disconnect the connectors from the center airbag sensor.

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

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

Standard Voltage:





(g) Turn the ignition switch off.

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

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

Standard Resistance:





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

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

Standard Resistance:





Text in Illustration





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

3. CHECK CENTER AIRBAG SENSOR

(a) Connect the connectors to the front seat side airbag RH and 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, 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 to ON, and wait for at least 60 seconds.

(g) Check for DTCs DTC Check / Clear.

OK:

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

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

Text in Illustration





NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

OK -- USE SIMULATION METHOD TO CHECK Diagnosis System