B1852

SUPPLEMENTAL RESTRAINT SYSTEMS: 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 and the rear 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 rear side squib RH circuit.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* W/ Navigation System:
* After the engine switch is turned off, the display and navigation module display (navigation system) records various types of memory and settings. As a result, after turning the engine switch off, be sure to wait for the time specified in the following table before disconnecting the cable from the negative (-) battery terminal.

Waiting Time before Disconnecting Cable from Negative (-) Battery Terminal:





* 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 the 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 REAR SEAT SIDE AIRBAG RH (REAR SIDE SQUIB RH)





(a) Turn the engine switch off.

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

(c) Disconnect the connector from the rear 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 rear seat side airbag 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 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 engine switch on (IG), and wait for at least 60 seconds.

(g) Clear the DTCs DTC Check / Clear.

(h) Turn the engine switch off.

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

(j) Check for DTCs DTC Check / Clear.

Result





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

Text in Illustration





B -- REPLACE REAR SEATBACK ASSEMBLY RH Removal

A -- REPLACE REAR SEATBACK ASSEMBLY RH Removal
C -- Continue to next step.

2. CHECK CONNECTOR

(a) Turn the engine 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 connector (on the rear seat side airbag RH side) is not damaged.

OK:

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





Text in Illustration





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

3. CHECK FLOOR WIRE (REAR SIDE SQUIB RH CIRCUIT)

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





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

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

Standard Voltage:





(d) Turn the engine switch off.

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

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

Standard Resistance:





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

(h) 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.

4. CHECK CENTER AIRBAG SENSOR





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

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

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

(d) Clear the DTCs DTC Check / Clear.

(e) Turn the engine switch off.

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

(g) Check for DTCs DTC Check / Clear.

OK:

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

HINT
Codes other than DTC B1850, B1851, B1852 and B1853 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