RM35X0E _58 Vehicle Interior _079257 SUPPLEMENTAL RESTRAINT SYSTEMS _0385034 AIRBAG SYSTEM(for Type B) C

SUPPLEMENTAL RESTRAINT SYSTEMS AIRBAG SYSTEM(for Type B) B1800 Short in D Squib Circuit B1801 Open in D Squib Circuit B1802 Short in D Squib Circuit (to Ground) B1803 Short in D Squib Circuit (to +B)

DESCRIPTION

The driver side squib circuit consists of the airbag sensor assembly, spiral 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 circuit.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Warning Indicate	Test Mode / Check Mode
B1800	Short in D Squib 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 circuit during the primary check. · A horn button assembly malfunction. · A spiral cable sub-assembly malfunction. · An airbag sensor assembly malfunction.	· Instrument panel wire · Spiral cable sub-assembly · Horn button assembly · Airbag sensor assembly	Comes on	Applicable
B1801	Open in D Squib Circuit	One of the following conditions is met: · The airbag sensor assembly detects an open circuit signal in the driver side squib circuit for 2 seconds. · A horn button assembly malfunction. · A spiral cable sub-assembly malfunction. · An airbag sensor assembly malfunction.	· Instrument panel wire · Spiral cable sub-assembly · Horn button assembly · Airbag sensor assembly	Comes on	Applicable
B1802	Short in D Squib 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 squib circuit for 0.5 seconds. · A horn button assembly malfunction. · A spiral cable sub-assembly malfunction. · An airbag sensor assembly malfunction.	· Instrument panel wire · Spiral cable sub-assembly · Horn button assembly · Airbag sensor assembly	Comes on	Applicable
B1803	Short in D Squib 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 circuit for 0.5 seconds. · A horn button assembly malfunction. · A spiral cable sub-assembly malfunction. · An airbag sensor assembly malfunction.	· Instrument panel wire · Spiral cable sub-assembly · Horn button assembly · Airbag sensor assembly	Comes on	Applicable

WIRING DIAGRAM

5.24,0.396 5.344,0.542 0.104,0.146 10 false 6 5.24,1.219 5.344,1.365 0.104,0.146 10 false 7 3.073,0.396 3.177,0.542 0.104,0.146 10 false 1 3.073,1.219 3.177,1.365 0.104,0.146 10 false 2 1.99,1.229 2.094,1.375 0.104,0.146 10 false 2 1.99,0.396 2.094,0.542 0.104,0.146 10 false 1 5.448,0.479 5.781,0.646 0.333,0.167 10 false D+ 5.448,1.323 5.948,1.51 0.5,0.188 10 false D- 2.781,0.396 3.031,0.583 0.25,0.188 10 false D+ 2.802,1.219 3.094,1.417 0.292,0.198 10 false D- 5.271,1.719 7.063,1.896 1.792,0.177 10 false N45 0.375,1.698 0.719,1.865 0.344,0.167 10 false z5 1.969,1.719 3.292,2.073 1.323,0.354 10 false N17 0.354,1.875 1.865,2.146 1.51,0.271 10 false Horn Button Assembly 5.271,1.885 7.063,2.063 1.792,0.177 10 false Airbag Sensor Assembly 1.979,1.906 4.01,2.281 2.031,0.375 10 false Spiral Cable Sub-assembly

CAUTION / NOTICE / HINT

NOTICE:

When installing the spiral cable sub-assembly and steering wheel, be sure to adjust the spiral cable sub-assembly as it may break if the steering wheel is turned before adjusting the spiral cable sub-assembly.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>SPIRAL CABLE>INSTALLATION201902,201906,_58,_079257,_0384936,RM100000001GJ82,201906,999999,_58,_079257,_0384936,RM100000001INDW,

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

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>BEFORE DISCONNECTING BATTERY201902,999999,_V1,_081196,_0393338,RM100000001HX6Q,

When disconnecting and reconnecting the battery

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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 CHART201902,201906,_V1,_081196,_0393338,RM100000001HX6S,201906,999999,_V1,_081196,_0393338,RM100000001IWEY,

After replacing the airbag sensor assembly, refer to initialization.

Click hereGeneral>SETUP>WHEN REPLACING OR REMOVING/INSTALLING PARTS>WORK PROCEDURE201902,201906,_V1,_081196,_0393339,RM100000001HX6U,201906,202005,_V1,_081196,_0393339,RM100000001IWEZ,202005,202107,_V1,_081196,_0393339,RM100000001M43S,202107,202208,_V1,_081196,_0393339,RM100000001WMAF,202208,999999,_V1,_081196,_0393339,RM1000000024IQN,

HINT:: To perform the simulation method, enter check mode (signal check) with the GTS (Click here Vehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for Type B)>CHECK MODE PROCEDURE201902,999999,_58,_079257,_0385034,RM100000001GJQ0,), and then wiggle each connector of the airbag system or drive the vehicle on various types of road (Click here General>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING201902,999999,_V1,_078841,_0386803,RM100000001GTWY,).

PROCEDURE

1.CHECK CONNECTORS

0.198,0.813 0.51,1.01 0.313,0.198 10 false *1 1.052,1.375 1.365,1.573 0.313,0.198 10 false *3 2.781,1.583 3.094,1.781 0.313,0.198 10 false *2 1.979,0.823 2.292,1.021 0.313,0.198 10 false *4

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

Turn the ignition switch off.

Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

Check that the connectors are properly connected to the horn button assembly, spiral 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.

Disconnect the connectors from the horn button assembly, spiral cable sub-assembly and airbag sensor 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 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 INSTRUMENT PANEL WIRE OR SPIRAL CABLE SUB-ASSEMBLY

2.CHECK HORN BUTTON ASSEMBLY

0.417,2.156 0.75,2.385 0.333,0.229 1.469,2.74 1.771,3.052 1.771,3.052 1.948,3.052 true 1.719,2.229 1.854,2.115 1.854,2.115 1.979,2.115 true 0.229,0.885 0.625,1.188 0.396,0.302 10 false *1 2.729,1.271 3.177,1.656 0.448,0.385 10 false *2 1.115,1.01 1.563,1.365 0.448,0.354 10 false *3 0.302,1.677 0.698,2.167 0.396,0.49 10 false *a 2,2.948 2.313,3.104 0.313,0.156 10 false *b 2.021,2.01 2.5,2.427 0.479,0.417 10 false *4 0.49,2.177 0.854,2.479 0.365,0.302 10 false z5 2.344,0.615 2.792,0.969 0.448,0.354 10 false A 2.177,0.615 2.625,0.969 0.448,0.354 10 false B 1.76,0.615 2.208,0.969 0.448,0.354 10 false C 1.594,0.615 2.042,0.969 0.448,0.354 10 false D 0.75,0.615 1.198,0.969 0.448,0.354 10 false E 0.438,0.615 0.885,0.969 0.448,0.354 10 false F

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

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

Connect the white wire side of SST (resistance: 2.1 Ω) to connector E (green connector).

CAUTION:: Never connect the 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 SST.

·

Insert SST straight into the terminals of the connector.

SST: 09843-18061

Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

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

Clear the DTCs stored in memory.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for Type B)>DTC CHECK / CLEAR201902,999999,_58,_079257,_0385034,RM100000001GJPZ,

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.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for Type B)>DTC CHECK / CLEAR201902,999999,_58,_079257,_0385034,RM100000001GJPZ,

Body Electrical > SRS Airbag > Trouble Codes: 50001 188

Result:

Proceed to
DTCs B1800, B1801, B1802 and B1803 are not output
DTC B1800, B1801, B1802 or B1803 is output

HINT:: Codes other than DTC B1800, B1801, B1802 and B1803 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, and wait for at least 90 seconds.

Disconnect SST from connector E.

DTCs B1800, B1801, B1802 and B1803 are not output

REPLACE HORN BUTTON ASSEMBLY

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DTC B1800, B1801, B1802 or B1803 is output

3.CHECK DRIVER SIDE SQUIB CIRCUIT

0.406,2.292 0.74,2.521 0.333,0.229 1.896,2.719 1.708,2.719 1.708,2.719 1.573,2.573 true 2.521,0.531 2.76,0.844 0.24,0.313 10 false A 2.208,0.542 2.448,0.854 0.24,0.313 10 false B 1.76,0.531 2,0.844 0.24,0.313 10 false C 1.604,0.531 1.844,0.844 0.24,0.313 10 false D 0.76,0.542 1,0.854 0.24,0.313 10 false E 0.448,0.542 0.688,0.854 0.24,0.313 10 false F 0.25,1.635 0.698,1.948 0.448,0.313 10 false *a 0.49,2.323 0.938,2.635 0.448,0.313 10 false z5 1.969,2.656 2.417,2.969 0.448,0.313 10 false *b 0.167,0.313 0.396,0.51 0.229,0.198 10 false *1 2.792,1.146 3.24,1.458 0.448,0.313 10 false *2 1.156,0.906 1.604,1.219 0.448,0.313 10 false *3

*1	Horn Button Assembly
*2	Airbag Sensor Assembly
*3	Spiral Cable Sub-assembly
*a	Front view of wire harness connector (to Horn Button Assembly)
*b	Color: Green
	Release the activation prevention mechanism

Disconnect the instrument panel wire from the airbag sensor assembly.

Check for a short to B+ in the circuit.

Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

ii.

Turn the ignition switch to ON.

iii.

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
z5-1 - Body ground	Ignition switch ON	Below 1 V
z5-2 - Body ground	Ignition switch ON	Below 1 V

iv.

Turn the ignition switch off.

Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

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
z5-1 - z5-2	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
z5-1 - Body ground	Always	1 MΩ or higher
z5-2 - Body ground	Always	1 MΩ or higher

Check for a short in the circuit.

Release the activation prevention mechanism built into connector B.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for Type B)>SYSTEM DESCRIPTION201902,999999,_58,_079257,_0385034,RM100000001GJPU,

ii.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
z5-1 - z5-2	Always	1 MΩ or higher

iii.

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

Result:

Proceed to
OK
NG

4.CHECK DTC

5.CHECK INSTRUMENT PANEL WIRE

4.CHECK DTC

0.313,0.823 0.625,1.021 0.313,0.198 10 false *1 2.583,1.583 2.896,1.781 0.313,0.198 10 false *2 1.146,1.344 1.458,1.542 0.313,0.198 10 false *3

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

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

Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

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

Clear the DTCs stored in memory.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for Type B)>DTC CHECK / CLEAR201902,999999,_58,_079257,_0385034,RM100000001GJPZ,

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.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for Type B)>DTC CHECK / CLEAR201902,999999,_58,_079257,_0385034,RM100000001GJPZ,

Body Electrical > SRS Airbag > Trouble Codes: 50001 188

Result:

Proceed to
DTCs B1800, B1801, B1802 and B1803 are not output
DTC B1800, B1801, B1802 or B1803 is output

HINT:: Codes other than DTC B1800, B1801, B1802 and B1803 may be output at this time, but they are not related to this check.

DTCs B1800, B1801, B1802 and B1803 are not output

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING201902,999999,_V1,_078841,_0386803,RM100000001GTWY,

DTC B1800, B1801, B1802 or B1803 is output

REPLACE AIRBAG SENSOR ASSEMBLY

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>CENTER AIRBAG SENSOR ASSEMBLY>REMOVAL201902,201906,_58,_079257,_0384942,RM100000001GJ8V,201906,999999,_58,_079257,_0384942,RM100000001IN22,

5.CHECK INSTRUMENT PANEL WIRE

0.438,2.406 0.823,2.604 0.385,0.198 0.99,2.99 1.115,2.99 1.115,2.99 1.26,2.635 true 1.76,3.01 1.625,3.01 1.625,3.01 1.448,2.625 true 0.146,0.615 0.458,0.813 0.313,0.198 10 false *1 1.906,0.604 2.219,0.802 0.313,0.198 10 false *4 2.74,1.469 3.052,1.667 0.313,0.198 10 false *2 1.031,1.177 1.344,1.375 0.313,0.198 10 false *3 0.344,1.979 0.656,2.177 0.313,0.198 10 false *a 0.74,2.917 1.094,3.104 0.354,0.188 10 false D+ 1.823,2.938 2.156,3.135 0.333,0.198 10 false D- 0.521,2.427 1.125,2.677 0.604,0.25 10 false N17 2.365,0.802 2.677,1 0.313,0.198 10 false A 2.104,0.813 2.417,1.01 0.313,0.198 10 false B 1.76,0.823 2.073,1.021 0.313,0.198 10 false C 1.479,0.823 1.792,1.021 0.313,0.198 10 false D 0.656,0.813 0.969,1.01 0.313,0.198 10 false E 0.396,0.813 0.708,1.01 0.313,0.198 10 false F

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

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, and wait for at least 2 seconds.

ii.

Turn the ignition switch to ON.

iii.

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
N17-1 (D+) - Body ground	Ignition switch ON	Below 1 V
N17-2 (D-) - Body ground	Ignition switch ON	Below 1 V

iv.

Turn the ignition switch off.

Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

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
N17-1 (D+) - N17-2 (D-)	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
N17-1 (D+) - Body ground	Always	1 MΩ or higher
N17-2 (D-) - Body ground	Always	1 MΩ or higher

Check for a short in the circuit.

Release the activation prevention mechanism built into connector B.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for Type B)>SYSTEM DESCRIPTION201902,999999,_58,_079257,_0385034,RM100000001GJPU,

ii.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
N17-1 (D+) - N17-2 (D-)	Always	1 MΩ or higher

iii.

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

Result:

Proceed to
OK
NG

REPLACE SPIRAL CABLE SUB-ASSEMBLY

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REPLACE INSTRUMENT PANEL WIRE