DESCRIPTION
The driver side squib 2nd step circuit consists of the center airbag sensor assembly, spiral cable and steering pad.
The center airbag sensor assembly uses this circuit to deploy the airbag when deployment conditions are met.
These DTCs are stored when a malfunction is detected in the driver side squib 2nd step circuit.
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
B1810/53 |
|
|
B1811/53 |
|
|
B1812/53 |
|
|
B1813/53 |
|
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
HINT:
PROCEDURE
1. |
CHECK CONNECTORS |
(a) Turn the ignition switch off. |
|
(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 steering pad, spiral cable and center airbag sensor assembly.
OK:
The connectors are properly connected.
HINT:
If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.
(d) Disconnect the connectors from the steering pad, spiral cable and center airbag sensor assembly.
(e) Check that the terminals of the connectors are not damaged.
OK:
The terminals are not deformed or damaged.
(f) Check that the spiral cable connector (on the steering pad side) is not damaged.
OK:
The lock button is not disengaged, and the claw of the lock is not deformed or damaged.
(g) Check that the short springs for the instrument panel wire and spiral cable with the activation prevention mechanism are not deformed or damaged.
OK:
The short springs are not deformed or damaged.
Text in Illustration
*1 |
Driver Side Squib 2nd Step |
*2 |
Spiral Cable |
*3 |
Center Airbag Sensor Assembly |
*4 |
Instrument Panel Wire |
NG |
REPLACE WIRE HARNESS |
|
2. |
CHECK STEERING PAD (DRIVER SIDE SQUIB 2ND STEP) |
(a) Connect the instrument panel wire to the center airbag sensor assembly and spiral cable. |
|
(b) Connect SST (resistance 2.1 Ω) to connector E (black connector).
CAUTION:
Never connect an electrical tester to the steering pad (driver side squib 2nd step) for measurement, as this may lead to a serious injury due to airbag deployment.
NOTICE:
SST: 09843-18061
(c) Connect the cable to the negative (-) battery terminal.
(d) Turn the ignition switch to ON, and wait for at least 60 seconds.
(e) Clear the DTCs stored in memory (See page ).
(f) Turn the ignition switch off.
(g) Turn the ignition switch to ON, and wait for at least 60 seconds.
(h) Check for DTCs (See page ).
OK:
DTCs B1810, B1811, B1812, B1813 or 53 is not output.
Text in Illustration
*1 |
Driver Side Squib 2nd Step |
*2 |
Spiral Cable |
*3 |
Center Airbag Sensor Assembly |
*4 |
Front view of wire harness connector (to Steering Pad) |
*5 |
Connector E |
*6 |
Color: Black |
HINT:
Codes other than DTCs B1810, B1811, B1812, B1813 and 53 may be output at this time, but they are not related to this check.
OK |
REPLACE STEERING PAD |
|
3. |
CHECK DRIVER SIDE SQUIB 2ND STEP CIRCUIT |
(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) Disconnect the instrument panel wire from the center airbag sensor assembly.
(e) Check for a short to B+ in the circuit.
(1) Connect the cable to the negative (-) battery terminal.
(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 |
---|---|---|
z2-2 (D2+) - Body ground |
Ignition switch ON |
Below 1 V |
z2-1 (D2-) - Body ground |
Ignition switch ON |
Below 1 V |
(f) Check for an open in the circuit.
(1) Turn the ignition switch off.
(2) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(3) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
z2-2 (D2+) - z2-1 (D2-) |
Always |
Below 1 Ω |
(g) 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 |
---|---|---|
z2-2 (D2+) - Body ground |
Always |
1 MΩ or higher |
z2-1 (D2-) - Body ground |
Always |
1 MΩ or higher |
(h) Check for a short in the circuit.
(1) Release the activation prevention mechanism built into connector B (See page ).
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
z2-2 (D2+) - z2-1 (D2-) |
Always |
1 MΩ or higher |
*1 |
Driver Side Squib 2nd Step |
*2 |
Spiral Cable |
*3 |
Center Airbag Sensor Assembly |
*4 |
Front view of wire harness connector (to Steering Pad) |
*5 |
Connector E |
*6 |
Color: Black |
NG |
GO TO STEP 5 |
|
4. |
CHECK CENTER AIRBAG SENSOR ASSEMBLY |
(a) Restore the released activation prevention mechanism of connector B to the original condition. |
|
(b) Connect the connectors to the steering pad and center airbag sensor assembly.
(c) Connect the cable to the negative (-) battery terminal.
(d) Turn the ignition switch to ON, and wait for at least 60 seconds.
(e) Clear the DTCs stored in memory (See page ).
(f) Turn the ignition switch off.
(g) Turn the ignition switch to ON, and wait for at least 60 seconds.
(h) Check for DTCs (See page ).
OK:
DTC B1810, B1811, B1812, B1813 or 53 is not output.
Text in Illustration
*1 |
Driver Side Squib 2nd Step |
*2 |
Spiral Cable |
*3 |
Center Airbag Sensor Assembly |
HINT:
Codes other than DTCs B1810, B1811, B1812, B1813 and 53 may be output at this time, but they are not related to this check.
OK |
USE SIMULATION METHOD TO CHECK |
NG |
REPLACE CENTER AIRBAG SENSOR ASSEMBLY |
5. |
CHECK INSTRUMENT PANEL WIRE |
(a) Restore the release activation prevention mechanism of connector B to the original condition. |
|
(b) Disconnect the instrument panel wire from spiral cable.
(c) Check for a short to B+ in the circuit.
(1) Connect the cable to the negative (-) battery terminal.
(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 |
---|---|---|
D7-4 (D2+) - Body ground |
Ignition switch ON |
Below 1 V |
D7-3 (D2-) - Body ground |
Ignition switch ON |
Below 1 V |
(d) Check for an open in the circuit.
(1) Turn the ignition switch off.
(2) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(3) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D7-4 (D2+) - D7-3 (D2-) |
Always |
Below 1 Ω |
(e) 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 |
---|---|---|
D7-4 (D2+) - Body ground |
Always |
1 MΩ or higher |
D7-3 (D2-) - Body ground |
Always |
1 MΩ or higher |
(f) Check for a short in the circuit.
(1) Release the activation prevention mechanism built into connector B (See page ).
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D7-4 (D2+) - D7-3 (D2-) |
Always |
1 MΩ or higher |
*1 |
Driver Side Squib 2nd Step |
*2 |
Spiral Cable |
*3 |
Center Airbag Sensor Assembly |
*4 |
Instrument Panel Wire |
*5 |
Front view of wire harness connector (to Spiral Cable) |
*6 |
Connector C |
NG |
REPLACE INSTRUMENT PANEL WIRE |
|
6. |
CHECK SPIRAL CABLE |
(a) Check for a short to B+ in the circuit. (1) Connect the cable to the negative (-) battery terminal. (2) Turn the ignition switch to ON. (3) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
(b) Check for an open in the circuit.
(1) Turn the ignition switch off.
(2) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(3) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
z2-2 (D2+) - z2-1 (D2-) |
Always |
Below 1 Ω |
(c) 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 |
---|---|---|
z2-2 (D2+) - Body ground |
Always |
1 MΩ or higher |
z2-1 (D2-) - Body ground |
Always |
1 MΩ or higher |
(d) Check for a short in the circuit.
(1) Release the activation prevention mechanism built into connector D (See page ).
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
z2-2 (D2+) - z2-1 (D2-) |
Always |
1 MΩ or higher |
*1 |
Driver Side Squib 2nd Step |
*2 |
Spiral Cable |
*3 |
Center Airbag Sensor Assembly |
*4 |
Instrument Panel Wire |
*5 |
Front view of wire harness connector (to Steering Pad) |
*6 |
Connector E |
*7 |
Color: Black |
OK |
USE SIMULATION METHOD TO CHECK |
NG |
REPLACE SPIRAL CABLE |
System Diagram
SYSTEM DIAGRAM
Communication Table
Transmitting ECU
Receiving ECU
Signal
Communication Method
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