B1852

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1850/62-B1853/62: Short in Rear Side Squib RH Circuit
B1853/62 - Short to B+ in Rear Side Squib RH Circuit

DESCRIPTION

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

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

These DTCs are stored when a malfunction is detected in the rear side squib RH 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 a city or rough road Diagnosis System.

PROCEDURE

1. CHECK REAR SEAT SIDE AIRBAG ASSEMBLY RH (REAR SIDE SQUIB RH)

(a) Turn the engine switch off.





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

(c) Disconnect the connector from the rear seat side airbag assembly RH.

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

CAUTION:
Never connect a tester to the rear seat side airbag assembly RH (rear 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.
* 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 engine switch on (IG), and wait for at least 60 seconds.

(g) Clear the DTCs stored in the memory Reading and Clearing Diagnostic Trouble Codes.

(h) Turn the engine switch off.

(i) Turn the engine switch on (IG), and wait for at least 60 seconds.

(j) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

OK:

DTC B1850, B1851, B1852, B1853, or 62 is not output.

HINT
Codes other than DTC B1850, B1851, B1852, B1853, and 62 may be output at this time, but they are not related to this check.

NG -- CHECK FLOOR WIRE NO. 2 (REAR SIDE SQUIB RH CIRCUIT)

OK -- REPLACE REAR SEAT SIDE AIRBAG ASSEMBLY RH Removal

2. CHECK FLOOR WIRE NO. 2 (REAR SIDE SQUIB RH CIRCUIT)

(a) Turn the engine switch off.





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

(c) Disconnect SST (resistance 2.1 Ohms) from the floor wire No. 2.

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

(e) 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 engine switch on (IG).

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

Standard voltage:





(f) Check for an open in the circuit.

(1) Turn the engine switch off.

(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:





(g) Check for a short to ground in the circuit.

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

Standard resistance:





(h) Check for a short in the circuit.

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

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

Standard resistance:





NG -- REPLACE FLOOR WIRE NO. 2
OK -- Continue to next step.

3. CHECK CENTER AIRBAG SENSOR ASSEMBLY

(a) Restore the released activation prevention mechanism of connector B to the original condition.





(b) Connect the connectors to the rear seat side airbag assembly RH and the center airbag sensor assembly.

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

(d) Turn the engine switch on (IG), and wait for at least 60 seconds.

(e) Clear the DTCs stored in the memory Reading and Clearing Diagnostic Trouble Codes.

(f) Turn the engine switch off.

(g) Turn the engine switch on (IG), and wait for at least 60 seconds.

(h) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

OK:

DTC B1850, B1851, B1852, B1853, or 62 is not output.

HINT
Codes other than DTC B1850, B1851, B1852, B1853, and 62 may be output at this time, but they are not related to this check.

NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

OK -- USE SIMULATION METHOD TO CHECK Diagnosis System