RM3660EC _58 Vehicle Interior _080741 SUPPLEMENTAL RESTRAINT SYSTEMS _0610731 AIRBAG SYSTEM(for NR Series Engine) C

SUPPLEMENTAL RESTRAINT SYSTEMS AIRBAG SYSTEM(for NR Series Engine) B1810 Short in D Squib (Dual Stage - 2nd Step) Circuit B1811 Open in D Squib (Dual Stage - 2nd Step) Circuit B1812 Short in D Squib (Dual Stage - 2nd Step) Circuit (to Ground) B1813 Short in D Squib (Dual Stage - 2nd Step) Circuit (to +B)

DESCRIPTION

The driver squib 2nd step circuit consists of the airbag sensor with ECU assembly, spiral cable sub-assembly and horn button assembly.

The airbag sensor with ECU 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 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	· The airbag sensor with ECU assembly detects a line short in the driver squib 2nd step circuit during the primary check. · Spiral cable sub-assembly malfunction · Driver squib 2nd step malfunction · Airbag sensor with ECU assembly malfunction	· Instrument panel wire · Spiral cable sub-assembly · Driver squib 2nd step (Horn button assembly) · Airbag sensor with ECU assembly	Comes on	Applies to check mode
B1811	Open in D Squib (Dual Stage - 2nd Step) Circuit	· The airbag sensor with ECU assembly detects an open in the driver squib 2nd step circuit. · Spiral cable sub-assembly malfunction · Driver squib 2nd step malfunction · Airbag sensor with ECU assembly malfunction	· Instrument panel wire · Spiral cable sub-assembly · Driver squib 2nd step (Horn button assembly) · Airbag sensor with ECU assembly	Comes on	Applies to check mode
B1812	Short in D Squib (Dual Stage - 2nd Step) Circuit (to Ground)	· The airbag sensor with ECU assembly detects a short to ground in the driver squib 2nd step circuit. · Spiral cable sub-assembly malfunction · Driver squib 2nd step malfunction · Airbag sensor with ECU assembly malfunction	· Instrument panel wire · Spiral cable sub-assembly · Driver squib 2nd step (Horn button assembly) · Airbag sensor with ECU assembly	Comes on	Applies to check mode
B1813	Short in D Squib (Dual Stage - 2nd Step) Circuit (to +B)	· The airbag sensor with ECU assembly detects a short to B+ in the driver squib 2nd step circuit. · Spiral cable sub-assembly malfunction · Driver squib 2nd step malfunction · Airbag sensor with ECU assembly malfunction	· Instrument panel wire · Spiral cable sub-assembly · Driver squib 2nd step (Horn button assembly) · Airbag sensor with ECU assembly	Comes on	Applies to check mode

WIRING DIAGRAM

4.948,1.344 5.333,1.625 0.385,0.281 10 false D2+ 4.948,1.896 5.333,2.177 0.385,0.281 10 false D2- 4.771,1.344 5.156,1.625 0.385,0.281 10 false 9 4.771,1.896 5.156,2.177 0.385,0.281 10 false 8 4.917,2.917 5.427,3.219 0.51,0.302 10 false I47 4.927,3.094 7.104,3.313 2.177,0.219 10 false Airbag Sensor with ECU Assembly 3.25,1.438 3.76,1.74 0.51,0.302 10 false I22 3.24,2 3.75,2.302 0.51,0.302 10 false I22 3.302,1.229 3.813,1.531 0.51,0.302 10 false 4 3.302,1.781 3.813,2.083 0.51,0.302 10 false 3 2.396,2.406 3.365,2.854 0.969,0.448 10 false Spiral Cable Sub-assembly 2.854,1.344 3.344,1.646 0.49,0.302 10 false D2+ 2.875,1.896 3.26,2.177 0.385,0.281 10 false D2- 2.458,1.344 2.844,1.625 0.385,0.281 10 false D2+ 2.458,1.896 2.844,2.177 0.385,0.281 10 false D2- 2.104,1.438 2.615,1.74 0.51,0.302 10 false z16 2.104,1.99 2.615,2.292 0.51,0.302 10 false z16 1.729,1.344 2.115,1.625 0.385,0.281 10 false D2+ 1.75,1.896 2.135,2.177 0.385,0.281 10 false D2- 0.865,2.417 2.083,2.99 1.219,0.573 10 false Driver Squib 2nd Step (Horn Button Assembly) 2.177,1.229 2.688,1.531 0.51,0.302 10 false 2 2.177,1.781 2.688,2.083 0.51,0.302 10 false 1

CAUTION / NOTICE / HINT

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) battery terminal.

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HINT:: When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.; Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>AUTOMATIC LEARNING CHART202304,999999,_V1,_143216,_0598315,RM100000002B3MJ,

HINT:: ·

Perform the simulation method by selecting check mode (Signal Check) using the GTS.

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·

After selecting check mode (Signal Check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city road or rough road.

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PROCEDURE

1.CHECK CONNECTORS

1.979,1.083 1.979,1.469 false 0.271,1.083 0.271,1.469 false 0.208,1.49 0.729,1.844 0.521,0.354 10 false *1 1.052,0.948 1.563,1.292 0.51,0.344 10 false *2 2.75,0.969 3.229,1.292 0.479,0.323 10 false *3 1.906,1.49 2.323,1.792 0.417,0.302 10 false *4 2.365,0.938 2.74,1.323 0.375,0.385 10 false A 2.104,0.938 2.448,1.438 0.344,0.5 10 false B 1.76,0.948 2.135,1.229 0.375,0.281 10 false C 1.5,0.948 1.948,1.333 0.448,0.385 10 false D 0.656,0.948 1.344,1.49 0.688,0.542 10 false E 0.396,0.948 1,1.323 0.604,0.375 10 false F

*1	Horn Button Assembly
*2	Spiral Cable Sub-assembly
*3	Airbag Sensor with ECU Assembly
*4	Instrument Panel Wire

Turn the ignition switch off.

Disconnect the cable from the negative (-) battery terminal.

CAUTION:: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

Check that the connectors are properly connected to the horn button assembly, spiral cable sub-assembly and airbag sensor with ECU assembly.

OK:: The connectors are properly connected.

HINT:: If the connectors are not properly connected, reconnect the connectors and proceed to the next inspection.

Disconnect the connectors from the horn button assembly, spiral cable sub-assembly and airbag sensor with ECU assembly.

Check that the terminals of the connectors are not deformed or damaged.

OK:: The terminals are not deformed or damaged.

Check that the spiral cable sub-assembly connector (on the horn button assembly side) is not loose, deformed or damaged.

OK:: The airbag connector locking button is not disengaged, and the claw of the lock is not deformed or damaged.

Check that the short springs of the activation prevention mechanisms of the instrument panel wire connector and spiral cable sub-assembly connector are not deformed or damaged.

OK:: The short springs are not deformed or damaged.

Result:

Proceed to
OK
NG

2.CHECK HORN BUTTON ASSEMBLY

REPLACE WIRE HARNESS

2.CHECK HORN BUTTON ASSEMBLY

0.365,2.146 0.688,2.385 0.323,0.24 0.323,1.104 0.323,0.771 false 1.979,2.333 1.729,2.333 false 1.167,2.292 0.667,2.688 true 0.26,1.125 0.594,1.417 0.333,0.292 10 false *1 1.146,0.625 1.531,0.948 0.385,0.323 10 false *2 2.719,0.615 3.104,1 0.385,0.385 10 false *3 0.333,1.708 0.708,2.198 0.375,0.49 10 false *a 0.51,2.615 0.938,3 0.427,0.385 10 false *b 2.333,0.615 2.719,1 0.385,0.385 10 false A 2.177,0.615 2.563,1 0.385,0.385 10 false B 1.75,0.615 2.135,1 0.385,0.385 10 false C 1.594,0.615 1.979,1 0.385,0.385 10 false D 0.75,0.615 1.135,1 0.385,0.385 10 false E 0.438,0.615 0.823,1 0.385,0.385 10 false F 0.417,2.188 0.792,2.677 0.375,0.49 10 false z16 2.021,2.25 2.448,2.635 0.427,0.385 10 false SST

*1	Horn Button Assembly
*2	Spiral Cable Sub-assembly
*3	Airbag Sensor with ECU Assembly
*a	Front view of wire harness connector (to Horn Button Assembly)
*b	Color: Black

Connect the instrument panel wire to the airbag sensor with ECU assembly and spiral cable sub-assembly.

Connect SST (resistance 2.1 Ω) to connector E (black connector).

CAUTION:: Never connect a tester to the horn button assembly 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 it.

·

Insert SST straight into the terminals of the connector.

SST: 09843-18061

Connect the cable to the negative (-) battery terminal.

Turn the ignition switch to ON, and wait for at least 60 seconds.

Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs: 50002 188

Turn the ignition switch off.

Turn the ignition switch to ON, and wait for at least 60 seconds.

Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes: 50001 188

OK:: DTC B1810, B1811, B1812 or B1813 is not output.

HINT:: Codes other than DTCs B1810, B1811, B1812 and B1813 may be output at this time, but they are not related to this check.

Turn the ignition switch off.

Disconnect the cable from the negative (-) battery terminal.

CAUTION:: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

Disconnect SST from connector E.

Result:

Proceed to
OK
NG

REPLACE HORN BUTTON ASSEMBLY

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3.CHECK DRIVER SQUIB 2ND STEP CIRCUIT

0.552,2.177 0.896,2.417 0.344,0.24 0.26,1.198 0.26,0.865 false 1,1.833 1.302,2.083 true 1.802,1.833 1.469,2.083 true 0.865,2.625 1.26,2.323 true 0.198,1.208 0.594,1.656 0.396,0.448 10 false *1 1.094,0.719 1.5,1.063 0.406,0.344 10 false *2 2.75,0.729 3.188,1.469 0.438,0.74 10 false *3 0.313,1.688 0.802,2.302 0.49,0.615 10 false *a 0.708,2.531 1.271,2.917 0.563,0.385 10 false *b 0.615,2.219 1.01,2.667 0.396,0.448 10 false z16 1.844,1.75 2.24,2.198 0.396,0.448 10 false D2+ 0.75,1.75 1.146,2.198 0.396,0.448 10 false D2- 2.385,0.729 2.823,1.469 0.438,0.74 10 false A 2.063,0.729 2.5,1.469 0.438,0.74 10 false B 1.708,0.729 2.146,1.469 0.438,0.74 10 false C 1.552,0.729 1.99,1.469 0.438,0.74 10 false D 0.698,0.729 1.135,1.469 0.438,0.74 10 false E 0.375,0.729 0.813,1.469 0.438,0.74 10 false F

*1	Horn Button Assembly
*2	Spiral Cable Sub-assembly
*3	Airbag Sensor with ECU Assembly
*a	Front view of wire harness connector (to Horn Button Assembly)
*b	Color: Black

Disconnect the instrument panel wire from the airbag sensor with ECU assembly.

Check for a short to B+ in the circuit.

Connect the cable to the negative (-) battery terminal.

ii.

Turn the ignition switch to ON.

iii.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
z16-2 (D2+) - Body ground	Ignition switch ON	Below 1 V
z16-1 (D2-) - Body ground	Ignition switch ON	Below 1 V

iv.

Turn the ignition switch off.

Disconnect the cable from the negative (-) battery terminal.

CAUTION:: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

Check for an open in the circuit.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
z16-2 (D2+) - z16-1 (D2-)	Always	Below 1 Ω

Check for a short to ground in the circuit.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
z16-2 (D2+) - Body ground	Always	1 MΩ or higher
z16-1 (D2-) - Body ground	Always	1 MΩ or higher

Check for a short in the circuit.

Release the activation prevention mechanism built into connector B.

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ii.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
z16-2 (D2+) - z16-1 (D2-)	Always	1 MΩ or higher

iii.

Restore the released activation prevention mechanism of connector B to the original condition.

Result:

Proceed to
OK
NG

4.CHECK DTC

5.CHECK INSTRUMENT PANEL WIRE

4.CHECK DTC

0.313,1.01 0.313,0.344 0.313,0.344 0.563,0.344 false 0.594,0.26 1.063,0.521 0.469,0.26 10 false *1 0.427,1.01 1.031,1.688 0.604,0.677 10 false F 0.583,1.01 1.021,1.573 0.438,0.563 10 false E 1.51,1.01 1.729,1.385 0.219,0.375 10 false D 1.667,1.01 1.917,1.375 0.25,0.365 10 false C 2.094,1.01 2.49,1.354 0.396,0.344 10 false B 2.25,1.01 2.542,1.292 0.292,0.281 10 false A 1,1.01 1.49,1.656 0.49,0.646 10 false *2 2.667,1.021 2.979,1.365 0.313,0.344 10 false *3

*1	Horn Button Assembly
*2	Spiral Cable Sub-assembly
*3	Airbag Sensor with ECU Assembly

Connect the connectors to the horn button assembly and airbag sensor with ECU assembly.

Connect the cable to the negative (-) battery terminal.

Turn the ignition switch to ON, and wait for at least 60 seconds.

Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs: 50002 188

Turn the ignition switch off.

Turn the ignition switch to ON, and wait for at least 60 seconds.

Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes: 50001 188

OK:: DTC B1810, B1811, B1812 or B1813 is not output.

HINT:: Codes other than DTCs B1810, B1811, B1812 and B1813 may be output at this time, but they are not related to this check.

Result:

Proceed to
OK
NG

USE SIMULATION METHOD TO CHECK

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REPLACE AIRBAG SENSOR WITH ECU ASSEMBLY

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5.CHECK INSTRUMENT PANEL WIRE

0.521,2.417 0.885,2.656 0.365,0.24 0.281,0.948 0.281,1.229 false 1.531,2.625 1.313,2.958 true 1.729,2.615 1.938,2.958 true 1.969,0.823 1.969,0.396 1.969,0.396 1.802,0.396 false 0.615,2.458 0.99,2.875 0.375,0.417 10 false I22 0.396,0.802 0.615,1.115 0.219,0.313 10 false F 0.667,0.813 0.927,1.156 0.26,0.344 10 false E 1.49,0.813 1.771,1.083 0.281,0.271 10 false D 1.75,0.813 2,1.094 0.25,0.281 10 false C 2.104,0.813 2.344,1.083 0.24,0.271 10 false B 2.375,0.802 2.677,1.156 0.302,0.354 10 false A 1.042,0.813 1.375,1.177 0.333,0.365 10 false *2 0.208,1.25 0.49,1.563 0.281,0.313 10 false *1 2.74,0.823 3.094,1.167 0.354,0.344 10 false *3 0.333,1.969 0.604,2.188 0.271,0.219 10 false *a 1.208,2.979 1.646,3.198 0.438,0.219 10 false D2- 1.646,0.313 1.948,0.583 0.302,0.271 10 false *4 1.875,2.979 2.302,3.198 0.427,0.219 10 false D2+

*1	Horn Button Assembly
*2	Spiral Cable Sub-assembly
*3	Airbag Sensor with ECU Assembly
*4	Instrument Panel Wire
*a	Front view of wire harness connector (to Spiral Cable Sub-assembly)

Disconnect the instrument panel wire from the spiral cable sub-assembly.

Check for a short to B+ in the circuit.

Connect the cable to the negative (-) battery terminal.

ii.

Turn the ignition switch to ON.

iii.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
I22-4 (D2+) - Body ground	Ignition switch ON	Below 1 V
I22-3 (D2-) - Body ground	Ignition switch ON	Below 1 V

iv.

Turn the ignition switch off.

Disconnect the cable from the negative (-) battery terminal.

CAUTION:: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

Check for an open in the circuit.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I22-4 (D2+) - I22-3 (D2-)	Always	Below 1 Ω

Check for a short to ground in the circuit.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I22-4 (D2+) - Body ground	Always	1 MΩ or higher
I22-3 (D2-) - Body ground	Always	1 MΩ or higher

Check for a short in the circuit.

Release the activation prevention mechanism built into connector B.

ii.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I22-4 (D2+) - I22-3 (D2-)	Always	1 MΩ or higher

iii.

Restore the released activation prevention mechanism of connector B to the original condition.

Result:

Proceed to
OK
NG

6.CHECK SPIRAL CABLE SUB-ASSEMBLY

REPLACE INSTRUMENT PANEL WIRE

6.CHECK SPIRAL CABLE SUB-ASSEMBLY

0.563,2.146 0.896,2.375 0.333,0.229 0.26,1.208 0.26,0.875 false 1.969,0.74 1.969,0.323 1.969,0.323 1.802,0.323 false 0.865,2.604 1.24,2.333 true 1.01,1.823 1.313,2.104 true 1.771,1.833 1.49,2.094 true 0.198,1.219 0.615,1.552 0.417,0.333 10 false *1 1.042,0.729 1.521,1.219 0.479,0.49 10 false *2 2.781,0.729 3.198,1.323 0.417,0.594 10 false *3 1.656,0.25 2.01,0.573 0.354,0.323 10 false *4 0.333,1.708 0.729,2.198 0.396,0.49 10 false *a 0.708,2.531 1.104,2.948 0.396,0.417 10 false *b 2.385,0.729 2.802,1.323 0.417,0.594 10 false A 2.104,0.729 2.521,1.323 0.417,0.594 10 false B 1.76,0.729 2.177,1.323 0.417,0.594 10 false C 1.479,0.729 1.896,1.323 0.417,0.594 10 false D 0.656,0.729 1.073,1.323 0.417,0.594 10 false E 0.375,0.729 0.792,1.323 0.417,0.594 10 false F 0.625,2.177 1.021,2.594 0.396,0.417 10 false z16 0.76,1.75 1.156,2.167 0.396,0.417 10 false D2- 1.823,1.75 2.219,2.167 0.396,0.417 10 false D2+

*1	Horn Button Assembly
*2	Spiral Cable Sub-assembly
*3	Airbag Sensor with ECU Assembly
*4	Instrument Panel Wire
*a	Front view of wire harness connector (to Horn Button Assembly)
*b	Color: Black

Check for a short to B+ in the circuit.

Connect the cable to the negative (-) battery terminal.

ii.

Turn the ignition switch to ON.

iii.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
z16-2 (D2+) - Body ground	Ignition switch ON	Below 1 V
z16-1 (D2-) - Body ground	Ignition switch ON	Below 1 V

iv.

Turn the ignition switch off.

Disconnect the cable from the negative (-) battery terminal.

CAUTION:: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

Check for an open in the circuit.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
z16-2 (D2+) - z16-1 (D2-)	Always	Below 1 Ω

Check for a short to ground in the circuit.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
z16-2 (D2+) - Body ground	Always	1 MΩ or higher
z16-1 (D2-) - Body ground	Always	1 MΩ or higher

Check for a short in the circuit.

Release the activation prevention mechanism built into connector D.

ii.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
z16-2 (D2+) - z16-1 (D2-)	Always	1 MΩ or higher

iii.

Restore the released activation prevention mechanism of connector D to the original condition.

Result:

Proceed to
OK
NG

USE SIMULATION METHOD TO CHECK

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REPLACE SPIRAL CABLE SUB-ASSEMBLY

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