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

SUPPLEMENTAL RESTRAINT SYSTEMS AIRBAG SYSTEM(for Type B) B1637 Curtain Shield Airbag Sensor Lost Communication (LH) B1638 Curtain Shield Airbag Sensor Initialization Error (LH)

DESCRIPTION

The side collision sensor LH circuit consists of the airbag sensor assembly, No. 2 side airbag sensor LH and No. 1 side airbag sensor LH.

The No. 2 side airbag sensor LH detects impacts to the vehicle and sends signals to the airbag sensor assembly to determine if the SRS should be deployed.

These DTCs are stored when a malfunction is detected in the side collision sensor LH circuit.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Warning Indicate	Test Mode / Check Mode
B1637	Curtain Shield Airbag Sensor Lost Communication (LH)	One of the following conditions is met: · The airbag sensor assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the circuit for the side collision sensor LH for 2 seconds. · A No. 2 side airbag sensor LH malfunction. · An airbag sensor assembly malfunction.	· Floor wire · No. 2 side airbag sensor LH · No. 1 Side airbag sensor LH · Airbag sensor assembly	Comes on	Not applicable
B1638	Curtain Shield Airbag Sensor Initialization Error (LH)	One of the following conditions is met: · The airbag sensor assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the circuit for the side collision sensor LH for 2 seconds. · A No. 2 side airbag sensor LH malfunction. · An airbag sensor assembly malfunction.	· Floor wire · No. 2 side airbag sensor LH · No. 1 Side airbag sensor LH · Airbag sensor assembly	Comes on	Not applicable

WIRING DIAGRAM

5.354,2.115 7.021,2.5 1.667,0.385 10 false Airbag Sensor Assembly 0.469,4.052 2.396,4.448 1.927,0.396 10 false No. 1 Side Airbag Sensor LH 3.854,3.99 5.708,4.219 1.854,0.229 10 false No. 2 Side Airbag Sensor LH 5.719,0.833 6.333,1.031 0.615,0.198 10 false BCL+ 5.719,1.49 6.333,1.688 0.615,0.198 10 false BCL- 1.083,0.833 1.698,1.031 0.615,0.198 10 false BFL+ 1.094,1.458 1.708,1.656 0.615,0.198 10 false BFL- 1.083,2.802 1.698,3 0.615,0.198 10 false BEL+ 1.073,3.344 1.688,3.542 0.615,0.198 10 false BEL- 4.167,2.802 4.781,3 0.615,0.198 10 false BEL+ 4.167,3.344 4.781,3.542 0.615,0.198 10 false BEL- 5.354,0.719 5.833,1.25 0.479,0.531 10 false 29 5.365,1.313 5.844,1.844 0.479,0.531 10 false 30 1.667,0.698 2.313,1.417 0.646,0.719 10 false 4 1.667,1.333 2.531,2.75 0.865,1.417 10 false 3 1.646,2.656 2.417,3.542 0.771,0.885 10 false 1 1.635,3.198 2.271,4.01 0.635,0.813 10 false 2 3.844,3.219 4.615,4.104 0.771,0.885 10 false 1 3.844,2.646 4.479,3.458 0.635,0.813 10 false 2 5.354,1.896 5.813,2.094 0.458,0.198 10 false V1 0.458,3.854 0.917,4.052 0.458,0.198 10 false V7 3.854,3.792 4.313,3.99 0.458,0.198 10 false V8

CAUTION / NOTICE / HINT

NOTICE:

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

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>WORK PROCEDURE201902,201906,_V1,_081196,_0393338,RM100000001HX6R,201906,999999,_V1,_081196,_0393338,RM100000001JBY9,

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,

PROCEDURE

1.CHECK CONNECTION OF CONNECTORS

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 No. 2 side airbag sensor LH and No. 1 side airbag sensor LH.

Result:

Proceed to
The connectors are properly connected
The connectors are not properly connected

The connectors are properly connected

2.CHECK CONNECTORS

The connectors are not properly connected

CONNECT CONNECTORS PROPERLY

2.CHECK CONNECTORS

0.604,1.458 0.917,1.615 0.313,0.156 10 false *1 2.573,1.469 2.885,1.625 0.313,0.156 10 false *2 1.521,1.094 1.833,1.25 0.313,0.156 10 false *3

*1	No. 2 Side Airbag Sensor LH
*2	No. 1 Side Airbag Sensor LH
*3	Floor Wire

Disconnect the connectors from the No. 2 side airbag sensor LH and No. 1 side airbag sensor LH.

Check that the connectors (on the No. 2 side airbag sensor LH side and No. 1 side airbag sensor LH side) are not damaged.

Result:

Proceed to
The connectors are not deformed or damaged
The connectors are deformed or damaged

The connectors are not deformed or damaged

3.CHECK FLOOR WIRE

The connectors are deformed or damaged

REPLACE FRONT DOOR WIRE LH OR FLOOR WIRE

3.CHECK FLOOR WIRE

0.74,0.813 1.125,1.063 0.385,0.25 2.469,2.917 2.885,3.125 0.417,0.208 1.49,1.479 1.656,1.479 1.656,1.479 1.896,1.031 true 2.573,1.5 2.406,1.5 2.406,1.5 2.083,1.031 true 1.01,3.521 1.156,3.521 1.156,3.521 1.646,3.719 true 1.5,3.073 1.615,3.073 1.615,3.073 1.813,3.698 true 1.927,4.188 2.146,4.333 2.146,4.333 2.302,4.333 true 0.448,2.583 0.76,2.74 0.313,0.156 10 false *1 2.635,2.583 2.948,2.74 0.313,0.156 10 false *2 1.552,2.375 1.865,2.531 0.313,0.156 10 false *3 0.76,0.292 1.073,0.448 0.313,0.156 10 false *a 0.531,2.906 0.844,3.063 0.313,0.156 10 false *b 0.854,0.854 1.167,1.01 0.313,0.156 10 false V8 2.396,2.125 2.708,2.281 0.313,0.156 10 false A 2.073,2.125 2.385,2.281 0.313,0.156 10 false B 1.031,2.115 1.344,2.271 0.313,0.156 10 false C 0.719,2.115 1.031,2.271 0.313,0.156 10 false D 2.552,2.938 2.865,3.094 0.313,0.156 10 false V7 2.635,1.406 3.198,1.667 0.563,0.26 10 false BEL+ 1.115,1.396 1.677,1.656 0.563,0.26 10 false BEL- 1.115,3 1.677,3.26 0.563,0.26 10 false BEL- 0.604,3.438 1.167,3.698 0.563,0.26 10 false BEL+ 2.354,4.25 2.667,4.406 0.313,0.156 10 false *4

*1	No. 2 Side Airbag Sensor LH
*2	No. 1 Side Airbag Sensor LH
*3	Floor Wire
*4	Service Wire
*a	Front view of wire harness connector (to No. 2 Side Airbag Sensor LH)
*b	Front view of wire harness connector (to No. 1 Side Airbag Sensor LH)

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

Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
V8-2 (BEL+) - Body ground	Ignition switch ON	Below 1 V
V8-1 (BEL-) - Body ground	Ignition switch ON	Below 1 V

Turn the ignition switch off.

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

Using a service wire, connect terminals 1 (BEL+) and 2 (BEL-) of connector B.

NOTICE:: Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
V8-2 (BEL+) - V8-1 (BEL-)	Always	Below 1 Ω

Disconnect the service wire from connector B.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
V8-2 (BEL+) - V8-1 (BEL-)	Always	1 MΩ or higher
V8-2 (BEL+) - Body ground	Always	1 MΩ or higher
V8-1 (BEL-) - Body ground	Always	1 MΩ or higher

Result:

Proceed to
OK
NG

4.CHECK NO. 2 SIDE AIRBAG SENSOR LH

REPLACE FLOOR WIRE

4.CHECK NO. 2 SIDE AIRBAG SENSOR LH

0.979,1.51 1.292,1.708 0.313,0.198 10 false *1 2.26,1.521 2.573,1.719 0.313,0.198 10 false *2

*1	No. 2 Side Airbag Sensor RH
*2	No. 1 Side Airbag Sensor LH

Connect the connector to the No. 1 side airbag sensor LH.

Interchange the No. 2 side airbag sensor LH with RH and connect the connectors to them.

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
DTC B1637 or B1638 is output
DTC B1632 or B1633 is output
DTCs B1632, B1633, B1637 and B1638 are not output

HINT:: Codes other than DTC B1632, B1633, B1637 and B1638 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.

Return the No. 2 side airbag sensor RH and LH to their original positions and connect the connectors to them.

DTC B1637 or B1638 is output

5.CHECK NO. 1 SIDE AIRBAG SENSOR LH

DTC B1632 or B1633 is output

REPLACE NO. 2 SIDE AIRBAG SENSOR LH

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DTCs B1632, B1633, B1637 and B1638 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,

5.CHECK NO. 1 SIDE AIRBAG SENSOR LH

Interchange the No. 1 side airbag sensor LH with RH and connect the connectors to them.

0.875,0.938 1.188,1.135 0.313,0.198 10 false *1 2.406,1.313 2.719,1.51 0.313,0.198 10 false *2

*1	No. 1 Side Airbag Sensor RH
*2	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
DTC B1637 or B1638 is output
DTC B1632 or B1633 is output
DTCs B1632, B1633, B1637 and B1638 are not output

HINT:: Codes other than DTC B1632, B1633, B1637 and B1638 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.

Return the No. 1 side airbag sensor RH and LH to their original positions and connect the connectors to them.

DTC B1637 or B1638 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,

DTC B1632 or B1633 is output

REPLACE NO. 1 SIDE AIRBAG SENSOR LH

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>SIDE AIRBAG SENSOR (for Center Pillar)>REMOVAL201902,201906,_58,_079257,_0384945,RM100000001GJ98,201906,999999,_58,_079257,_0384945,RM100000001IIRP,

DTCs B1632, B1633, B1637 and B1638 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,