DESCRIPTION
The airbag cut-off switch circuit consists of the airbag sensor assembly and airbag cut-off switch.
The front passenger airbag can be optionally deactivated via this circuit by turning the airbag cut-off switch to the OFF position.
If the front passenger airbag is deactivated, the passenger airbag ON/OFF indicator ("OFF") comes on to inform the passengers.
DTC B1651/33 is stored when a malfunction is detected in the airbag cut-off switch circuit.
DTC No. | DTC Detecting Condition | Trouble Area |
---|---|---|
B1651/33 | Any of the following conditions is met:
|
|
WIRING DIAGRAM
*a | Airbag Cut-off Switch |
*b | Airbag Sensor Assembly |
CAUTION / NOTICE / HINT
Tech Tips
Terminals F14-11 (MSW+) and F14-12 (MSW-) of the airbag sensor assembly in this circuit have an activation prevention mechanism.
This mechanism can be used to check for an open circuit in the wire harness. In case of other checks (check for short, short to ground or short to B+), this mechanism should be released.
PROCEDURE
CHECK CONNECTORS
Turn the ignition switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.
Check that the connectors are properly connected to the airbag sensor assembly and airbag cut-off switch.
OK |
---|
The connectors are properly connected. |
Tech Tips
If the connector is not connected securely, reconnect the connector and proceed to the next inspection.
Disconnect the connectors from the airbag sensor assembly and airbag cut-off switch.
Check that the terminals of the connectors are not damaged.
OK |
---|
The terminals are not deformed or damaged. |
Check that the short spring for the instrument panel wire connector with the activation prevention mechanism is not deformed or damaged.
OK |
---|
The short spring is not deformed or damaged. |
NG |
REPLACE INSTRUMENT PANEL WIRE |
OK |
CHECK INSTRUMENT PANEL WIRE (OPEN)
*A | w/ Curtain Shield Airbag |
*B | w/o Curtain Shield Airbag |
*1 | Airbag Cut-off Switch |
*2 | Airbag Sensor Assembly |
*3 | Instrument Panel Wire |
*4 | Connector B |
*5 | Connector C |
*6 | Service Wire |
*a | Front view of wire harness connector (to Airbag Sensor Assembly) |
*b | Front view of wire harness connector (to Airbag Cut-off Switch) |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPLACE INSTRUMENT PANEL WIRE |
OK |
CHECK INSTRUMENT PANEL WIRE (SHORT)
*A | w/ Curtain Shield Airbag |
*B | w/o Curtain Shield Airbag |
*1 | Airbag Cut-off Switch |
*2 | Airbag Sensor Assembly |
*3 | Instrument Panel Wire |
*4 | Connector C |
*a | Front view of wire harness connector (to Airbag Cut-off Switch) |
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 the original condition.
NG |
REPLACE INSTRUMENT PANEL WIRE |
OK |
CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)
*A | w/ Curtain Shield Airbag |
*B | w/o Curtain Shield Airbag |
*1 | Airbag Cut-off Switch |
*2 | Airbag Sensor Assembly |
*3 | Instrument Panel Wire |
*4 | Connector C |
*a | Front view of wire harness connector (to Airbag Cut-off Switch) |
Connect the cable to the negative (-) auxiliary battery terminal.
Turn the ignition switch to ON (IG).
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 (-) auxiliary battery terminal.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.
NG |
REPLACE INSTRUMENT PANEL WIRE |
OK |
CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)
*A | w/ Curtain Shield Airbag |
*B | w/o Curtain Shield Airbag |
*1 | Airbag Cut-off Switch |
*2 | Airbag Sensor Assembly |
*3 | Instrument Panel Wire |
*4 | Connector C |
*a | Front view of wire harness connector (to Airbag Cut-off Switch) |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
NG |
REPLACE INSTRUMENT PANEL WIRE |
OK |
CHECK AIRBAG CUT-OFF SWITCH
*a | Component without harness connected (Airbag Cut-off Switch) |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
NG |
REPLACE AIRBAG CUT-OFF SWITCH Click here |
OK |
CHECK AIRBAG SENSOR ASSEMBLY
Connect the connectors to the airbag sensor assembly and airbag cut-off switch.
Connect the cable to the negative (-) auxiliary battery terminal.
Turn the ignition switch to ON (IG), and wait for at least 60 seconds.
Clear the DTCs stored in the memory Click here.
Turn the ignition switch off.
Turn the ignition switch to ON (IG), and wait for at least 60 seconds.
Check for DTCs Click here.
OK |
---|
DTC B1651/33 is not output. |
Tech Tips
Codes other than DTC B1651/33 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 |