DESCRIPTION
The driver side squib 2nd step circuit consists of the airbag sensor assembly,
spiral with sensor cable sub-assembly and horn button assembly.
The circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are stored when a malfunction is detected in the driver side squib
2nd step circuit.
|
DTC No.
|
Detection Item
|
DTC Detection Condition
|
Trouble Area
|
Warning Indicate
|
Test Mode / Check Mode
|
|
B1810
|
Short in D Squib (Dual Stage - 2nd Step) Circuit
|
One of the following conditions is met:
- The airbag sensor assembly detects a line short circuit signal 5
times in the driver side squib 2nd step circuit during the primary check.
- A horn button assembly (driver side squib 2nd step) malfunction.
- A spiral with sensor cable sub-assembly malfunction.
- An airbag sensor assembly malfunction.
|
- Instrument panel wire
- Spiral with sensor cable sub-assembly
- Horn button assembly (driver side squib 2nd step)
- Airbag sensor assembly
|
Comes on
|
Applicable
|
|
B1811
|
Open in D Squib (Dual Stage - 2nd Step) Circuit
|
One of the following conditions is met:
- The airbag sensor assembly detects an open circuit signal in the
driver side squib 2nd step circuit for 2 seconds.
- A horn button assembly (driver side squib 2nd step) malfunction.
- A spiral with sensor cable sub-assembly malfunction.
- An airbag sensor assembly malfunction.
|
- Instrument panel wire
- Spiral with sensor cable sub-assembly
- Horn button assembly (driver side squib 2nd step)
- Airbag sensor assembly
|
Comes on
|
Applicable
|
|
B1812
|
Short in D Squib (Dual Stage - 2nd Step) Circuit (to Ground)
|
One of the following conditions is met:
- The airbag sensor assembly detects a short circuit to ground signal
in the driver side 2nd step circuit for 0.5 seconds.
- A horn button assembly (driver side squib 2nd step) malfunction.
- A spiral with sensor cable sub-assembly malfunction.
- An airbag sensor assembly malfunction.
|
- Instrument panel wire
- Spiral with sensor cable sub-assembly
- Horn button assembly (driver side squib 2nd step)
- Airbag sensor assembly
|
Comes on
|
Applicable
|
|
B1813
|
Short in D Squib (Dual Stage - 2nd Step) Circuit (to +B)
|
One of the following conditions is met:
- The airbag sensor assembly detects a short circuit to B+ signal
in the driver side squib 2nd step circuit for 0.5 seconds.
- A horn button assembly (driver side squib 2nd step) malfunction.
- A spiral with sensor cable sub-assembly malfunction.
- An airbag sensor assembly malfunction.
|
- Instrument panel wire
- Spiral with sensor cable sub-assembly
- Horn button assembly (driver side squib 2nd step)
- Airbag sensor assembly
|
Comes on
|
Applicable
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- When installing the spiral with sensor cable sub-assembly and steering wheel,
be sure to adjust the spiral with sensor cable sub-assembly as it may break
if the steering wheel is turned before adjusting the spiral with sensor cable
sub-assembly.
Click here 
- 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
HINT:
To perform the simulation method, enter check mode (signal check) with the Techstream
(Click here ), and then wiggle each connector of
the airbag system or drive the vehicle on various types of road (Click here
).
PROCEDURE
|
(a) Turn the ignition switch off.
|
 |
|
*1
|
Horn Button Assembly (Driver Side Squib 2nd Step)
|
|
*2
|
Airbag Sensor Assembly
|
|
*3
|
Spiral with Sensor Cable Sub-assembly
|
|
*4
|
Instrument Panel Wire
|
|
|
(b) Disconnect the cable from the negative (-) battery terminal, and wait for
at least 90 seconds.
(c) Check that the connectors are properly connected to the horn button assembly
(driver side squib 2nd step), spiral with sensor cable sub-assembly and airbag sensor
assembly.
OK:
The connectors are properly connected.
HINT:
If the connectors are not properly connected, reconnect the connectors and proceed
to the next inspection.
(d) Disconnect the connectors from the horn button assembly (driver side squib
2nd step), spiral with sensor cable sub-assembly and airbag sensor assembly.
(e) Check that the terminals of the connectors are not deformed or damaged.
OK:
The terminals are not deformed or damaged.
(f) Check that the spiral with sensor cable sub-assembly connector (on the horn
button assembly [driver side squib 2nd step] side) is not loose, deformed or damaged.
OK:
The connector locking button is not disengaged, and the claw of the lock is not
deformed or damaged.
(g) Check that the short springs of the activation prevention mechanisms of the
instrument panel wire connector and spiral with sensor cable sub-assembly connector
are not deformed or damaged.
OK:
The short springs are not deformed or damaged.
| NG |
 |
REPLACE INSTRUMENT PANEL WIRE OR SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY
|
| OK |
|
|
|
2.
|
CHECK HORN BUTTON ASSEMBLY (DRIVER SIDE SQUIB 2ND STEP)
|
|
(a) Connect the instrument panel wire to the airbag sensor assembly and
spiral with sensor cable sub-assembly.
|
|
|
*1
|
Horn Button Assembly (Driver Side Squib 2nd Step)
|
|
*2
|
Airbag Sensor Assembly
|
|
*3
|
Spiral with Sensor Cable Sub-assembly
|
|
*4
|
SST
|
|
*a
|
Front view of wire harness connector
(to Horn Button Assembly [Driver Side Squib 2nd Step])
|
|
*b
|
Color: Black
|
|
|
(b) Connect the white wire side of SST (resistance: 2.1 Ω) to connector E (black
connector).
CAUTION:
Never connect the tester to the horn button assembly (driver side squib 2nd step)
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
(c) Connect the cable to the negative (-) battery terminal, and wait for at least
2 seconds.
(d) Turn the ignition switch to ON, and wait for at least 60 seconds.
(e) Clear the DTCs.
Click here
(f) Turn the ignition switch off.
(g) Turn the ignition switch to ON, and wait for at least 60 seconds.
(h) Check for DTCs.
Click here
|
Result
|
Proceed to
|
|
DTC B1810, B1811, B1812 or B1813 is not output
|
A
|
|
DTC B1810, B1811, B1812 or B1813 is output
|
B
|
HINT:
Codes other than DTC B1810, B1811, B1812 and B1813 may be output at this time,
but they are not related to this check.
(i) Turn the ignition switch off.
(j) Disconnect the cable from the negative (-) battery terminal, and wait for
at least 90 seconds.
(k) Disconnect SST from connector E.
| A |
|
REPLACE HORN BUTTON ASSEMBLY
|
| B |
|
|
|
|
3.
|
CHECK DRIVER SIDE SQUIB 2ND STEP CIRCUIT
|
(a) Disconnect the instrument panel wire from the airbag sensor assembly.
|
*1
|
Horn Button Assembly (Driver Side Squib 2nd Step)
|
|
*2
|
Airbag Sensor Assembly
|
|
*3
|
Spiral with Sensor Cable Sub-assembly
|
|
*4
|
Instrument Panel Wire
|
|
*a
|
Front view of wire harness connector
(to Horn Button Assembly [Driver Side Squib 2nd Step])
|
|
*b
|
Color: Black
|
 |
Release the activation prevention mechanism
|
(b) Check for a short to B+ in the circuit.
(1) Connect the cable to the negative (-) battery terminal, and wait for at least
2 seconds.
(2) Turn the ignition switch to ON.
(3) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection
|
Switch Condition
|
Specified Condition
|
|
z5-2 (D2+) - Body ground
|
Ignition switch ON
|
Below 1 V
|
|
z5-1 (D2-) - Body ground
|
Ignition switch ON
|
Below 1 V
|
(4) Turn the ignition switch off.
(5) Disconnect the cable from the negative (-) battery terminal, and wait for
at least 90 seconds.
(c) Check for an open in the circuit.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection
|
Condition
|
Specified Condition
|
|
z5-2 (D2+) - z5-1 (D2-)
|
Always
|
Below 1 Ω
|
(d) Check for a short to ground in the circuit.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection
|
Condition
|
Specified Condition
|
|
z5-2 (D2+) - Body ground
|
Always
|
1 MΩ or higher
|
|
z5-1 (D2-) - Body ground
|
Always
|
1 MΩ or higher
|
(e) Check for a short in the circuit.
(1) Release the activation prevention mechanism built into connector B.
Click here
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection
|
Condition
|
Specified Condition
|
|
z5-2 (D2+) - z5-1 (D2-)
|
Always
|
1 MΩ or higher
|
(3) Restore the released activation prevention mechanism of connector B to the
original condition.
| NG |
|
GO TO STEP 5
|
| OK |
|
|
|
|
(a) Connect the connectors to the horn button assembly (driver side squib
2nd step) and airbag sensor assembly.
|
|
|
*1
|
Horn Button Assembly (Driver Side Squib 2nd Step)
|
|
*2
|
Airbag Sensor Assembly
|
|
*3
|
Spiral with Sensor Cable Sub-assembly
|
|
|
(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.
Click here
(e) Turn the ignition switch off.
(f) Turn the ignition switch to ON, and wait for at least 60 seconds.
(g) Check for DTCs.
Click here
|
Result
|
Proceed to
|
|
DTC B1810, B1811, B1812 or B1813 is not output
|
A
|
|
DTC B1810, B1811, B1812 or B1813 is output
|
B
|
HINT:
Codes other than DTC B1810, B1811, B1812 and B1813 may be output at this time,
but they are not related to this check.
| A |
|
USE SIMULATION METHOD TO CHECK
|
| B |
|
REPLACE AIRBAG SENSOR ASSEMBLY
|
|
5.
|
CHECK INSTRUMENT PANEL WIRE
|
(a) Disconnect the instrument panel wire from the spiral with sensor cable sub-assembly.
|
*1
|
Horn Button Assembly (Driver Side Squib 2nd Step)
|
|
*2
|
Airbag Sensor Assembly
|
|
*3
|
Spiral with Sensor Cable Sub-assembly
|
|
*4
|
Instrument Panel Wire
|
|
*a
|
Front view of wire harness connector
(to Spiral with Sensor Cable Sub-assembly)
|
|
|
Release the activation prevention mechanism
|
(b) Check for a short to B+ in the circuit.
(1) Connect the cable to the negative (-) battery terminal, and wait for at least
2 seconds.
(2) Turn the ignition switch to ON.
(3) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection
|
Switch Condition
|
Specified Condition
|
|
J11-4 (D2+) - Body ground
|
Ignition switch ON
|
Below 1 V
|
|
J11-3 (D2-) - Body ground
|
Ignition switch ON
|
Below 1 V
|
(4) Turn the ignition switch off.
(5) Disconnect the cable from the negative (-) battery terminal, and wait for
at least 90 seconds.
(c) Check for an open in the circuit.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection
|
Condition
|
Specified Condition
|
|
J11-4 (D2+) - J11-3 (D2-)
|
Always
|
Below 1 Ω
|
(d) Check for a short to ground in the circuit.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection
|
Condition
|
Specified Condition
|
|
J11-4 (D2+) - Body ground
|
Always
|
1 MΩ or higher
|
|
J11-3 (D2-) - Body ground
|
Always
|
1 MΩ or higher
|
(e) Check for a short in the circuit.
(1) Release the activation prevention mechanism built into connector B.
Click here
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection
|
Condition
|
Specified Condition
|
|
J11-4 (D2+) - J11-3 (D2-)
|
Always
|
1 MΩ or higher
|
(3) Restore the released activation prevention mechanism of connector B to the
original condition.
| OK |
|
REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY
|
| NG |
|
REPLACE INSTRUMENT PANEL WIRE
|
| 
