DTC Code | DTC Name |
---|---|
B1860/64 | Short in Driver Side Knee Airbag Squib Circuit |
B1861/64 | Open in Driver Side Knee Airbag Squib Circuit |
B1862/64 | Short to GND in Driver Side Knee Airbag Squib Circuit |
B1863/64 | Short to B+ in Driver Side Knee Airbag Squib Circuit |
DESCRIPTION
The driver side knee squib circuit consists of the airbag sensor assembly and lower No. 1 instrument panel airbag assembly.
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 squib circuit.
DTC Code | DTC Detection Condition | Trouble Area |
---|---|---|
B1860/64 | One of the following conditions is met:
|
|
B1861/64 | One of the following conditions is met:
|
|
B1862/64 | One of the following conditions is met:
|
|
B1863/64 | One of the following conditions is met:
|
WIRING DIAGRAM
*a | Lower No. 1 Instrument Panel Airbag Assembly (Driver Side Knee Squib) |
*b | Airbag Sensor Assembly |
CAUTION / NOTICE / HINT
Note
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work Click here.
When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected Click here.
Tech Tips
To perform the simulation method, enter check mode (signal check) with the GTS (See page ), and then wiggle each connector of the airbag system or drive the vehicle on various types of road Click here.
PROCEDURE
CHECK LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY (DRIVER SIDE KNEE SQUIB)
*1 | Driver Side Knee Squib |
*2 | Airbag Sensor Assembly |
*3 | Connector C |
*4 | SST |
*a | Front view of wire harness connector (to Driver Side Knee Squib) |
Turn the ignition switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Disconnect the connector from the lower No. 1 instrument panel airbag assembly.
Connect the white wire side of SST (resistance: 2.1 Ω) to connector C.
CAUTION:
Never connect the tester to the lower No. 1 instrument panel airbag assembly (driver side knee squib) for measurement, as this may lead to a serious injury due to airbag deployment.
Note
Do not forcibly insert SST into the terminals of the connector when connecting SST.
Insert SST straight into the terminals of the connector.
Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
Turn the ignition switch to ON, and wait for at least 60 seconds.
Clear the DTCs Click here.
Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 60 seconds.
Check for DTCs Click here.
OK |
---|
DTC B1860/64, B1861/64, B1862/64 or B1863/64 is not output. |
Tech Tips
Codes other than DTC B1860/64, B1861/64, B1862/64 and B1863/64 may be output at this time, but they are not related to this check.
Turn the ignition switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Disconnect SST from connector C.
OK |
REPLACE LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY Click here |
NG |
CHECK CONNECTORS
Disconnect the connectors from the airbag sensor assembly.
*1 | Driver Side Knee Squib |
*2 | Instrument Panel Wire |
*3 | Airbag Sensor Assembly |
Check that the connectors (on the airbag sensor assembly side and lower No. 1 instrument panel airbag assembly side) are 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 |
CHECK INSTRUMENT PANEL WIRE
*1 | Driver Side Knee Squib |
*2 | Instrument Panel Wire |
*3 | Airbag Sensor Assembly |
*4 | Connector C |
*a | Front view of wire harness connector (to Driver Side Knee Squib) |
Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Turn the ignition switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
Release the activation prevention mechanism built into connector B Click here.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Restore the released activation prevention mechanism of connector B to its original condition.
NG |
REPLACE INSTRUMENT PANEL WIRE |
OK |
CHECK FOR DTC
*1 | Driver Side Knee Squib |
*2 | Airbag Sensor Assembly |
Connect the connectors to the lower No. 1 instrument panel airbag assembly and airbag sensor assembly.
Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
Turn the ignition switch to ON, and wait for at least 60 seconds.
Clear the DTCs Click here.
Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 60 seconds.
Check for DTCs Click here.
OK |
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DTC B1860/64, B1861/64, B1862/64 or B1863/64 is not output. |
Tech Tips
Codes other than DTC B1860/64, B1861/64, B1862/64 and B1863/64 may be output at this time, but they are not related to this check.
OK |
USE SIMULATION METHOD TO CHECK Click here |
NG |
REPLACE AIRBAG SENSOR ASSEMBLY Click here |