B1880
SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1880/68-B1883/68: Short in Seat Cushion Squib RH Circuit
B1883/68 - Short to B+ in Seat Cushion Squib RH Circuit
DESCRIPTION
The seat cushion squib RH circuit consists of the center airbag sensor and the seat cushion squib RH.
The circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are recorded when a malfunction is detected in the seat cushion squib RH circuit.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
* w/ Navigation System (for HDD):
After the power switch is turned OFF, the display and navigation module display (HDD navigation system) records various types of memory and settings. As a result, after turning the power 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, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.
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 SEAT CUSHION AIRBAG RH (SEAT CUSHION SQUIB RH)
(a) Turn the power switch OFF.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Disconnect the connectors from the seat cushion airbag RH.
(d) Connect the black wire side of SST (resistance: 2.1 Ohms) to connector E.
CAUTION:
Never connect the tester to the seat cushion airbag RH (seat cushion 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 negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(f) Turn the power switch ON (IG), and wait for at least 60 seconds.
(g) Clear the DTCs DTC Check / Clear.
(h) Turn the power switch OFF.
(i) Turn the power switch ON (IG), and wait for at least 60 seconds.
(j) Check for DTCs DTC Check / Clear.
OK:
DTC B1880, B1881, B1882 or B1883 is not output.
HINT
Codes other than DTC B1880, B1881, B1882 and B1883 may be output at this time, but they are not related to this check.
NG -- CHECK CONNECTOR
OK -- REPLACE SEAT CUSHION AIRBAG RH Removal
2. CHECK CONNECTOR
(a) Turn the power switch OFF.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Disconnect SST from connector E.
(d) Check that the floor wire and rear seat wire connectors (on the seat cushion airbag RH side) are not damaged.
OK:
The lock button is not disengaged, or the claw of the lock is not damaged or deformed.
NG -- REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.
3. CHECK SEAT CUSHION AIRBAG RH CIRCUIT
(a) Disconnect the connectors from the center airbag sensor.
(b) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(c) Turn the power switch ON (IG).
(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:
(e) Turn the power switch OFF.
(f) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(g) Measure the resistance according to the value(s) in the table below.
Standard resistance:
(h) Release the activation prevention mechanism built into connector B Diagnosis System.
(i) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- CHECK REAR SEAT WIRE RH
OK -- Continue to next step.
4. CHECK CENTER AIRBAG SENSOR
(a) Connect the connectors to the seat cushion airbag RH and the center airbag sensor.
(b) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(c) Turn the power switch ON (IG), and wait for at least 60 seconds.
(d) Clear the DTCs DTC Check / Clear.
(e) Turn the power switch OFF.
(f) Turn the power switch ON (IG), and wait for at least 60 seconds.
(g) Check for DTCs DTC Check / Clear.
OK:
DTC B1880, B1881, B1882 or B1883 is not output.
HINT
Codes other than DTC B1880, B1881, B1882 and B1883 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
5. CHECK REAR SEAT WIRE RH
(a) Restore the released activation prevention mechanism of connector B to its original condition.
(b) Disconnect the floor wire connector from the rear seat wire.
(c) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(d) Turn the power switch ON (IG).
(e) Measure the voltage according to the value(s) in the table below.
Standard voltage:
(f) Turn the power switch OFF.
(g) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(h) Measure the resistance according to the value(s) in the table below.
Standard resistance:
(i) Release the activation prevention mechanism built into connector D Diagnosis System.
(j) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPLACE REAR SEAT WIRE RH
OK -- REPLACE FLOOR WIRE