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)  B1638  Curtain Shield Airbag Sensor Initialization Error (LH)  


DESCRIPTION

The side collision sensor LH circuit (bus 1) consists of the airbag sensor with ECU assembly, side airbag pressure sensor LH and side No. 2 airbag sensor LH.

The side airbag pressure sensor LH and side No. 2 airbag sensor LH detect impacts to the vehicle and send signals to the airbag sensor with ECU assembly to determine if the airbags and pretensioners should be deployed.

DTC B1638 is stored when a malfunction is detected in the side collision sensor LH circuit (bus 1).

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B1638 Curtain Shield Airbag Sensor Initialization Error (LH)
·

The airbag sensor with ECU assembly detects a line short, short to ground or B+, or an open in the side collision sensor LH circuit (bus 1).

·

Side No. 2 airbag sensor LH malfunction

·

Airbag sensor with ECU assembly malfunction


·

Floor wire

·

Front door wire LH

·

Side No. 2 airbag sensor LH

·

Airbag sensor with ECU assembly


Comes on Does not apply to test/check mode

WIRING DIAGRAM

B473433E89
4.594,1.99 6.823,2.26 2.229,0.271 10 false Airbag Sensor with ECU Assembly 4.594,1.823 6.26,2.188 1.667,0.365 10 false O1 5.219,0.948 5.844,1.271 0.625,0.323 10 false Interface 1.656,2.531 2.281,2.854 0.625,0.323 10 false Interface 4.927,3.229 6.51,3.573 1.583,0.344 10 false Interface 0.771,2.542 1.406,2.833 0.635,0.292 10 false Element 5.865,3.229 6.5,3.521 0.635,0.292 10 false Element 4.646,0.51 6.313,0.875 1.667,0.365 10 false BBL+ 4.646,1.177 6.313,1.542 1.667,0.365 10 false BBL- 4.396,0.51 4.979,0.875 0.583,0.365 10 false 32 4.396,1.177 6.063,1.542 1.667,0.365 10 false 31 2.406,1.427 4.073,1.792 1.667,0.365 10 false BCL+ 2.854,1.427 4.521,1.792 1.667,0.365 10 false 4 2.427,2.094 4.094,2.458 1.667,0.365 10 false BCL- 2.854,2.094 4.521,2.458 1.667,0.365 10 false 3 2.417,2.781 4.083,3.146 1.667,0.365 10 false BDL+ 2.844,2.781 4.51,3.146 1.667,0.365 10 false 1 2.427,3.458 4.094,3.823 1.667,0.365 10 false BDL- 2.844,3.469 4.51,3.833 1.667,0.365 10 false 2 3.438,2.885 5.104,3.25 1.667,0.365 10 false LO1 3.438,3.573 5.104,3.938 1.667,0.365 10 false LO1 3.49,2.688 5.156,3.052 1.667,0.365 10 false 22 3.49,3.375 5.156,3.74 1.667,0.365 10 false 40 4.208,2.781 5.875,3.146 1.667,0.365 10 false 2 4.208,3.458 5.875,3.823 1.667,0.365 10 false 1 4.375,2.781 6.042,3.146 1.667,0.365 10 false BDL+ 4.375,3.458 6.042,3.823 1.667,0.365 10 false BDL- 0.563,4.125 2.229,4.49 1.667,0.365 10 false O11 0.563,4.302 2.646,4.615 2.083,0.313 10 false Side No. 2 Airbag Sensor LH 4.333,4.125 6,4.49 1.667,0.365 10 false L6 4.333,4.302 6.448,4.563 2.115,0.26 10 false Side Airbag Pressure Sensor LH

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 BATTERY

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 CHART




PROCEDURE

1.CHECK HISTORY DTC
a.

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


b.

Check for history DTCs.

Body Electrical > SRS Airbag > Trouble Codes
50001 188
HINT:

Codes other than history DTC B1637 may be output at this time, but they are not related to this check.



Result:
Result Proceed to
History DTC B1637 is not output. A
History DTC B1637 is output. B



A

2.CHECK CONNECTION OF CONNECTORS

B

GO TO DTC B1637

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for NR Series Engine)>B1635


2.CHECK CONNECTION OF CONNECTORS
a.

Turn the ignition switch off.


b.

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.



c.

Check that the connectors are properly connected to the airbag sensor with ECU assembly, side airbag pressure sensor LH and side No. 2 airbag sensor LH. Also check that the connectors that link the floor wire and front door wire LH are properly connected.

OK:

The connectors are properly connected.



Result:
Proceed to
OK
NG



OK

3.CHECK CONNECTORS

NG

CONNECT CONNECTORS PROPERLY

3.CHECK CONNECTORS
a.

Disconnect the connectors from the airbag sensor with ECU assembly, side airbag pressure sensor LH and side No. 2 airbag sensor LH. Also disconnect the connectors that link the floor wire and front door wire LH.


b.

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

OK:

The terminals are not deformed or damaged.



Result:
Proceed to
OK
NG



OK

4.CHECK FLOOR WIRE

NG

REPLACE FLOOR WIRE OR FRONT DOOR WIRE LH

4.CHECK FLOOR WIRE
a.
B474703C05
0.854,0.844 1.188,1.073 0.333,0.229 0.833,3.75 1.198,3.99 0.365,0.24 2.125,1.802 2.125,1.677 false 1.74,1.708 2.073,1.292 false 2.552,1.708 2.188,1.292 false 1.635,2.927 1.635,2.51 false 2.354,4.271 2.042,3.854 false 1.646,4.271 1.917,3.854 false 0.75,2.375 1.188,2.792 0.438,0.417 10 false *1 2.531,2.656 2.958,3.083 0.427,0.427 10 false *2 1.563,2.938 1.99,3.313 0.427,0.375 10 false *3 2.063,1.813 2.594,2.281 0.531,0.469 10 false *4 0.667,0.198 1.313,0.792 0.646,0.594 10 false *a 0.708,3.438 1.167,3.854 0.458,0.417 10 false *b 2.188,2.385 2.615,2.813 0.427,0.427 10 false A 1.885,2.385 2.313,2.813 0.427,0.427 10 false B 1.292,2.375 1.719,2.802 0.427,0.427 10 false C 0.979,2.375 1.406,2.802 0.427,0.427 10 false D 0.927,0.875 1.354,1.302 0.427,0.427 10 false O1 0.896,3.781 1.323,4.208 0.427,0.427 10 false O11 2.427,1.708 2.979,2.188 0.552,0.479 10 false BBL+ 1.594,1.719 2.771,2.146 1.177,0.427 10 false BBL- 2.219,4.281 2.771,4.542 0.552,0.26 10 false BCL+ 1.5,4.281 2.052,4.542 0.552,0.26 10 false BCL-
*1 Side No. 2 Airbag Sensor LH
*2 Airbag Sensor with ECU Assembly
*3 Floor Wire
*4 Service Wire
*a Front view of wire harness connector
(to Airbag Sensor with ECU Assembly)
*b Front view of wire harness connector
(to Side No. 2 Airbag Sensor LH)


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


b.

Turn the ignition switch to ON.


c.

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

Standard Voltage:
Tester Connection Condition Specified Condition
O11-4 (BCL+) - Body ground Ignition switch ON Below 1 V
O11-3 (BCL-) - Body ground Ignition switch ON Below 1 V



d.

Turn the ignition switch off.


e.

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.



f.

Using a service wire, connect terminals 32 (BBL+) and 31 (BBL-) of connector B.

NOTICE:

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



g.

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

Standard Resistance:
Tester Connection Condition Specified Condition
O11-4 (BCL+) - O11-3 (BCL-) Always Below 1 Ω



h.

Disconnect the service wire from connector B.


i.

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

Standard Resistance:
Tester Connection Condition Specified Condition
O11-4 (BCL+) - O11-3 (BCL-) Always 1 MΩ or higher
O11-4 (BCL+) - Body ground Always 1 MΩ or higher
O11-3 (BCL-) - Body ground Always 1 MΩ or higher



Result:
Proceed to
OK
NG



OK

5.CHECK WIRE HARNESS

NG

REPLACE FLOOR WIRE

5.CHECK WIRE HARNESS
a.
C295812C16
0.844,0.635 1.229,0.865 0.385,0.229 0.552,3.615 0.885,3.833 0.333,0.219 1.958,2.854 1.958,2.469 false 2.052,4.167 1.656,3.76 false 1.531,4.385 1.531,4.219 false 1.448,1.24 1.76,0.781 false 2.219,1.24 1.938,0.781 false 1.448,2.344 1.448,1.771 1.448,1.771 1.271,1.771 false 0.938,4.156 1.375,3.75 false 0.552,2.333 1.042,2.781 0.49,0.448 10 false *1 2.719,2.333 3.208,2.802 0.49,0.469 10 false *2 1.469,4.385 1.854,4.667 0.385,0.281 10 false *5 0.635,0.177 1.073,0.656 0.438,0.479 10 false *a 0.354,3.167 0.792,3.813 0.438,0.646 10 false *b 2.385,2.333 2.875,2.802 0.49,0.469 10 false A 2.083,2.333 2.573,2.802 0.49,0.469 10 false B 1.74,2.333 2.229,2.802 0.49,0.469 10 false C 1.583,2.333 2.073,2.802 0.49,0.469 10 false D 1.229,2.333 1.719,2.802 0.49,0.469 10 false E 0.927,2.333 1.417,2.802 0.49,0.469 10 false F 1.302,1.25 1.844,1.521 0.542,0.271 10 false BDL+ 2.083,1.25 2.75,1.667 0.667,0.417 10 false BDL- 1.906,4.167 2.406,4.635 0.5,0.469 10 false BDL+ 0.792,4.167 1.292,4.5 0.5,0.333 10 false BDL- 0.917,0.667 1.458,0.938 0.542,0.271 10 false O11 0.656,3.646 1.198,3.917 0.542,0.271 10 false L6 1.104,1.688 1.604,2.021 0.5,0.333 10 false *3 1.896,2.875 2.396,3.208 0.5,0.333 10 false *4
*1 Side Airbag Pressure Sensor LH
*2 Side No. 2 Airbag Sensor LH
*3 Front Door Wire LH
*4 Floor Wire
*5 Service Wire
*a Front view of wire harness connector
(to Side No. 2 Airbag Sensor LH)
*b Front view of wire harness connector
(to Side Airbag Pressure Sensor LH)


Connect the connectors that link the floor wire and front door wire LH.


b.

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


c.

Turn the ignition switch to ON.


d.

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

Standard Voltage:
Tester Connection Condition Specified Condition
O11-1 (BDL+) - Body ground Ignition switch ON Below 1 V
O11-2 (BDL-) - Body ground Ignition switch ON Below 1 V



e.

Turn the ignition switch off.


f.

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.



g.

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

NOTICE:

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



h.

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

Standard Resistance:
Tester Connection Condition Specified Condition
O11-1 (BDL+) - O11-2 (BDL-) Always Below 1 Ω



i.

Disconnect the service wire from connector E.


j.

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

Standard Resistance:
Tester Connection Condition Specified Condition
O11-1 (BDL+) - O11-2 (BDL-) Always 1 MΩ or higher
O11-1 (BDL+) - Body ground Always 1 MΩ or higher
O11-2 (BDL-) - Body ground Always 1 MΩ or higher



Result:
Proceed to
OK
NG



OK

6.CHECK SIDE NO. 2 AIRBAG SENSOR LH

NG

7.CHECK FLOOR WIRE
6.CHECK SIDE NO. 2 AIRBAG SENSOR LH
a.
C238328C01
0.719,0.813 1.073,1.24 0.354,0.427 10 false *1 1.104,0.813 1.354,1.25 0.25,0.438 10 false D 1.26,0.813 1.573,1.167 0.313,0.354 10 false C 1.729,0.813 2.031,1.073 0.302,0.26 10 false B 1.885,0.813 2.135,1.073 0.25,0.26 10 false A 2.323,1.135 2.646,1.385 0.323,0.25 10 false *2
*1 Side No. 2 Airbag Sensor RH
*2 Airbag Sensor with ECU Assembly


Connect the connectors to the side airbag pressure sensor LH and airbag sensor with ECU assembly.


b.

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


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.

Body Electrical > SRS Airbag > Clear DTCs
50002 188

f.

Turn the ignition switch off.


g.

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


h.

Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes
50001 188
HINT:

Codes other than DTCs B1633 and B1638 may be output at this time, but they are not related to this check.



Result:
Result Proceed to
DTC B1638 is output. A
DTC B1633 is output. B
DTCs B1633 and B1638 are not output. C


i.

Turn the ignition switch off.


j.

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.



k.

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



A

REPLACE AIRBAG SENSOR WITH ECU ASSEMBLY

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>CENTER AIRBAG SENSOR ASSEMBLY>REMOVAL


B

REPLACE SIDE NO. 2 AIRBAG SENSOR LH

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>REAR AIRBAG SENSOR>REMOVAL


C

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


7.CHECK FLOOR WIRE
a.
C284681C40
0.833,0.563 1.208,0.813 0.375,0.25 0.469,2.833 0.854,3.052 0.385,0.219 1.646,4.292 1.417,3.781 false 1.844,1.344 1.844,1.094 false 1.333,1.167 1.771,0.667 false 2.333,1.167 1.917,0.667 false 1.333,2.229 1.333,2.479 false 1.906,1.771 2.073,1.771 2.073,1.771 2.073,2.104 false 1.01,4.292 1.396,3.625 false 0.417,2.083 0.813,2.49 0.396,0.406 10 false *1 2.865,2.094 3.26,2.667 0.396,0.573 10 false *2 1.271,2.479 1.604,2.719 0.333,0.24 10 false *3 1.75,1.698 2.146,2.031 0.396,0.333 10 false *4 1.781,1.354 2.198,1.677 0.417,0.323 10 false *5 0.604,0.167 1,0.583 0.396,0.417 10 false *a 0.156,2.833 0.552,3.24 0.396,0.406 10 false *b 2.542,2.083 2.938,2.656 0.396,0.573 10 false A 2.24,2.083 2.635,2.656 0.396,0.573 10 false B 1.813,2.083 2.208,2.656 0.396,0.573 10 false C 1.521,2.083 1.917,2.656 0.396,0.573 10 false D 1.094,2.083 1.49,2.656 0.396,0.573 10 false E 0.792,2.083 1.188,2.656 0.396,0.573 10 false F 1.177,1.167 1.677,1.5 0.5,0.333 10 false BDL+ 2.198,1.167 2.698,1.5 0.5,0.333 10 false BDL- 0.854,4.302 1.708,4.542 0.854,0.24 10 false BDL+ 1.521,4.302 2.021,4.635 0.5,0.333 10 false BDL- 0.906,0.604 1.406,0.938 0.5,0.333 10 false O11 0.542,2.865 1.042,3.198 0.5,0.333 10 false LO1
*1 Side Airbag Pressure Sensor LH
*2 Side No. 2 Airbag Sensor LH
*3 Front Door Wire LH
*4 Floor Wire
*5 Service Wire
*a Front view of wire harness connector
(to Side No. 2 Airbag Sensor LH)
*b Front view of wire harness connector
(to Front Door Wire LH)


Disconnect the floor wire connector from the front door wire LH.


b.

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


c.

Turn the ignition switch to ON.


d.

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

Standard Voltage:
Tester Connection Condition Specified Condition
LO1-22 (BDL+) - Body ground Ignition switch ON Below 1 V
LO1-40 (BDL-) - Body ground Ignition switch ON Below 1 V



e.

Turn the ignition switch off.


f.

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.



g.

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

NOTICE:

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



h.

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

Standard Resistance:
Tester Connection Condition Specified Condition
LO1-22 (BDL+) - LO1-40 (BDL-) Always Below 1 Ω



i.

Disconnect the service wire from connector B.


j.

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

Standard Resistance:
Tester Connection Condition Specified Condition
LO1-22 (BDL+) - LO1-40 (BDL-) Always 1 MΩ or higher
LO1-22 (BDL+) - Body ground Always 1 MΩ or higher
LO1-40 (BDL-) - Body ground Always 1 MΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE FRONT DOOR WIRE LH

NG

REPLACE FLOOR WIRE