B1860

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1860/64-B1863/64: Short in Driver Side Knee Airbag Squib Circuit


DESCRIPTION

The driver side knee airbag squib circuit consists of the center airbag sensor and driver side knee airbag.

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

These DTCs are stored when a malfunction is detected in the driver side knee airbag squib 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 DRIVER SIDE KNEE AIRBAG (DRIVER SIDE KNEE SQUIB)





(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 driver side knee airbag.

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

CAUTION:
Never connect the tester to the driver side knee airbag (driver side knee squib) 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 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.

OK:

DTC B1860, B1861, B1862 or B1863 is not output.

HINT
Codes other than DTC B1860, B1861, B1862 and B1863 may be output at this time, but they are not related to this check.

NG -- CHECK CONNECTOR

OK -- REPLACE DRIVER SIDE KNEE AIRBAG ASSEMBLY Removal

2. CHECK CONNECTOR

(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) Check that the instrument panel wire connector (on the driver side knee airbag side) is not damaged.

OK:

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

NG -- REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.

3. CHECK INSTRUMENT PANEL WIRE (DRIVER SIDE KNEE AIRBAG 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 ignition 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:





NG -- REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.

4. CHECK CENTER AIRBAG SENSOR





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

(b) Connect the connectors to the driver side knee airbag and center airbag sensor.

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

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

(e) Clear the DTCs DTC Check / Clear.

(f) Turn the ignition switch OFF.

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

(h) Check for DTCs DTC Check / Clear.

OK:

DTC B1860, B1861, B1862 or B1863 is not output.

HINT
Codes other than DTC B1860, B1861, B1862 and B1863 may be output at this time, but they are not related to this check.

Result





B -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

A -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

C -- USE SIMULATION METHOD TO CHECK Diagnosis System