DESCRIPTION
The front passenger side squib 2nd step circuit consists of the center airbag sensor 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 2nd step circuit.
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
B1815/54 |
One of the following conditions is met:
|
|
B1816/54 |
One of the following conditions is met:
|
|
B1817/54 |
One of the following conditions is met:
|
|
B1818/54 |
One of the following conditions is met:
|
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
When disconnecting the cable from the negative (-) battery terminal while performing
repairs, some systems need to be initialized after the cable is reconnected (See
page ).
HINT:
To perform the simulation method, enter check mode (signal check) with the Techstream
(See page ), and then wiggle each connector of
the airbag system or drive the vehicle on various types of road (See page
).
PROCEDURE
1. |
CHECK INSTRUMENT PANEL PASSENGER AIRBAG (FRONT PASSENGER SIDE SQUIB 2ND STEP) |
(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 connectors from the instrument panel passenger airbag.
(d) Connect the white wire side of SST (resistance: 2.1 Ω) to connector E (black connector).
CAUTION:
Never connect the tester to the instrument panel passenger airbag (front passenger side squib 2nd step) for measurement, as this may lead to a serious injury due to airbag deployment.
NOTICE:
SST: 09843-18061
(e) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(f) Turn the ignition switch to ON, and wait for at least 60 seconds.
(g) Clear the DTCs (See page ).
(h) Turn the ignition switch off.
(i) Turn the ignition switch to ON, and wait for at least 60 seconds.
(j) Check for DTCs (See page ).
OK:
DTC B1815, B1816, B1817 or B1818 is not output.
HINT:
Codes other than DTC B1815, B1816, B1817 and B1818 may be output at this time, but they are not related to this check.
Text in Illustration
*1 |
Front Passenger Side Squib 2nd Step |
*2 |
Center Airbag Sensor |
*3 |
Connector E |
*4 |
SST |
*a |
Front view of wire harness connector (to Front Passenger Side Squib 2nd Step) |
*b |
Color: Black |
OK | ![]() |
REPLACE INSTRUMENT PANEL PASSENGER AIRBAG ASSEMBLY |
|
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 E.
(d) Check that the instrument panel wire connectors (on the instrument panel passenger airbag side) are not damaged. OK: The lock button is not disengaged, and the claw of the lock is not damaged or deformed. Text in Illustration
|
|
NG | ![]() |
REPLACE NO. 2 INSTRUMENT PANEL WIRE |
|
3. |
CHECK FRONT PASSENGER SIDE SQUIB 2ND STEP 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:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
z2-1 (P2+) - Body ground |
Ignition switch ON |
Below 1 V |
z2-2 (P2-) - Body ground |
Ignition switch ON |
Below 1 V |
(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:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
z2-1 (P2+) - z2-2 (P2-) |
Always |
Below 1 Ω |
(g) Release the activation prevention mechanism built into connector B (See page
).
(h) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
z2-1 (P2+) - z2-2 (P2-) |
Always |
1 MΩ or higher |
z2-1 (P2+) - Body ground |
Always |
1 MΩ or higher |
z2-2 (P2-) - Body ground |
Always |
1 MΩ or higher |
*1 |
Front Passenger Side Squib 2nd Step |
*2 |
Center Airbag Sensor |
*3 |
Connector E |
*a |
Front view of wire harness connector (to Front Passenger Side Squib 2nd Step) |
*b |
Color: Black |
NG | ![]() |
GO TO STEP 5 |
|
4. |
CHECK CENTER AIRBAG SENSOR |
(a) Connect the connectors to the instrument panel passenger airbag and center airbag sensor. |
|
(b) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(c) Turn the ignition switch to ON, and wait for at least 60 seconds.
(d) Clear the DTCs (See page ).
(e) Turn the ignition switch off.
(f) Turn the ignition switch to ON, and wait for at least 60 seconds.
(g) Check for DTCs (See page ).
OK:
DTC B1815, B1816, B1817 or B1818 is not output.
HINT:
Codes other than DTC B1815, B1816, B1817 and B1818 may be output at this time, but they are not related to this check.
Text in Illustration
*1 |
Front Passenger Side Squib 2nd Step |
*2 |
Center Airbag Sensor |
OK | ![]() |
USE SIMULATION METHOD TO CHECK |
NG | ![]() |
REPLACE CENTER AIRBAG SENSOR ASSEMBLY |
5. |
CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - NO. 2 INSTRUMENT PANEL WIRE) |
(a) Restore the released activation prevention mechanism of connector B to its original condition. |
|
(b) Disconnect the instrument panel wire connector from the No. 2 instrument panel wire.
(c) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
Fz1-3 - Body ground |
Ignition switch ON |
Below 1 V |
Fz1-4 - Body ground |
Ignition switch ON |
Below 1 V |
(e) Turn the ignition switch off.
(f) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(g) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
Fz1-3 - Fz1-4 |
Always |
Below 1 Ω |
(h) Release the activation prevention mechanism built into connector B (See page
).
(i) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
Fz1-3 - Fz1-4 |
Always |
1 MΩ or higher |
Fz1-3 - Body ground |
Always |
1 MΩ or higher |
Fz1-4 - Body ground |
Always |
1 MΩ or higher |
*1 |
Front Passenger Side Squib 2nd Step |
*2 |
No. 2 Instrument Panel Wire |
*3 |
Instrument Panel Wire |
*4 |
Center Airbag Sensor |
*5 |
Connector C |
*a |
Front view of wire harness connector (to No. 2 Instrument Panel Wire) |
OK | ![]() |
REPLACE NO. 2 INSTRUMENT PANEL WIRE |
NG | ![]() |
REPLACE INSTRUMENT PANEL WIRE |
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
HINT:
If a trouble code is output during the DTC check, inspect the trouble
areas listed for that code. For details of the code, refer to the "See page"
below.
*: The air conditioning amplifier stor ...
Washer Fluid Level Warning Switch Circuit
DESCRIPTION
When the volume of washer fluid decreases to below a certain level (when the
level warning switch is turned on), the multi-information display in the combination
meter assembly displays "LOW WASHER FLUID" to warn the driver.
WIRING ...