DTC Code | DTC Name |
---|---|
B1805/52 | Short in Front Passenger Side Squib Circuit |
B1806/52 | Open in Front Passenger Side Squib Circuit |
B1807/52 | Short to GND in Front Passenger Side Squib Circuit |
B1808/52 | Short to B+ in Front Passenger Side Squib Circuit |
DESCRIPTION
The front passenger side squib circuit consists of the center airbag sensor assembly and instrument panel passenger airbag.
The circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are stored when a malfunction is detected in the front passenger side squib circuit.
DTC Code | DTC Detection Condition | Trouble Area |
---|---|---|
B1805/52 | One of the following conditions is met:
|
|
B1806/52 | One of the following conditions is met:
|
|
B1807/52 | One of the following conditions is met:
|
|
B1808/52 | One of the following conditions is met:
|
WIRING DIAGRAM
INSPECTION PROCEDURE
Note
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work Click here.
When disconnecting the cable from the negative (-) auxiliary 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 Click here, and then wiggle each connector of the airbag system or drive the vehicle on various types of road Click here.
PROCEDURE
CHECK INSTRUMENT PANEL PASSENGER AIRBAG ASSEMBLY (FRONT PASSENGER SIDE SQUIB)
*1 | Front Passenger Side Squib |
*2 | Center Airbag Sensor Assembly |
*3 | Connector E |
*4 | SST |
*a | Front view of wire harness connector (to Front Passenger Side Squib) |
*b | Color: Orange |
Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
Disconnect the connectors from the instrument panel passenger airbag.
Connect the white wire side of SST (resistance: 2.1 Ω) to connector E (orange connector).
CAUTION:
Never connect the tester to the instrument panel passenger airbag (front passenger side 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 (-) auxiliary battery terminal, and wait for at least 2 seconds.
Turn the power switch on (IG), and wait for at least 60 seconds.
Clear the DTCs Click here.
Turn the power switch off.
Turn the power switch on (IG), and wait for at least 60 seconds.
Check for DTCs Click here.
OK |
---|
DTC B1805/52, B1806/52, B1807/52 or B1808/52 is not output. |
Tech Tips
Codes other than DTC B1805/52, B1806/52, B1807/52 and B1808/52 may be output at this time, but they are not related to this check.
Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
Disconnect SST from connector E.
NG |
CHECK CONNECTOR Click here |
OK |
REPLACE INSTRUMENT PANEL PASSENGER AIRBAG ASSEMBLY Click here
CHECK CONNECTOR
Disconnect the connectors from the center airbag sensor assembly.
*1 | Front Passenger Side Squib |
*2 | Center Airbag Sensor Assembly |
Check that the connectors (on the center airbag sensor assembly side and instrument panel passenger airbag side) are not damaged.
OK |
---|
The lock button is not disengaged, and the claw of the lock is not deformed or damaged. |
NG |
REPLACE HARNESS AND CONNECTOR |
OK |
CHECK FRONT PASSENGER SIDE SQUIB CIRCUIT
*1 | Front Passenger Side Squib |
*2 | Center Airbag Sensor Assembly |
*3 | Connector E |
*a | Front view of wire harness connector (to Front Passenger Side Squib) |
*b | Color: Orange |
Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
Turn the power switch on (IG).
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary 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 |
CHECK INSTRUMENT PANEL WIRE Click here |
OK |
CHECK CENTER AIRBAG SENSOR ASSEMBLY
*1 | Front Passenger Side Squib |
*2 | Center Airbag Sensor Assembly |
Connect the connectors to the instrument panel passenger airbag and center airbag sensor assembly.
Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
Turn the power switch on (IG), and wait for at least 60 seconds.
Clear the DTCs Click here.
Turn the power switch off.
Turn the power switch on (IG), and wait for at least 60 seconds.
Check for DTCs Click here.
OK |
---|
DTC B1805/52, B1806/52, B1807/52 or B1808/52 is not output. |
Tech Tips
Codes other than DTC B1805/52, B1806/52, B1807/52 and B1808/52 may be output at this time, but they are not related to this check.
NG |
REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here |
OK |
USE SIMULATION METHOD TO CHECK Click here
CHECK INSTRUMENT PANEL WIRE
*1 | Front Passenger Side Squib |
*2 | No. 2 Instrument Panel Wire |
*3 | Instrument Panel Wire |
*4 | Center Airbag Sensor Assembly |
*5 | Connector C |
*a | Front view of wire harness connector (to No. 2 Instrument Panel Wire) |
Disconnect the instrument panel wire connector from the No. 2 instrument panel wire.
Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
Turn the power switch on (IG).
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary 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 |
REPLACE NO. 2 INSTRUMENT PANEL WIRE