RM35X0E _58 Vehicle Interior _079257 SUPPLEMENTAL RESTRAINT SYSTEMS _0396679 AIRBAG SYSTEM(for Type C) C

SUPPLEMENTAL RESTRAINT SYSTEMS  AIRBAG SYSTEM(for Type C)  B18F5  Short in Curtain Shield Airbag (LH) Squib (Triple Stage - 3rd Step) Circuit  B18F6  Open in Curtain Shield Airbag (LH) Squib (Triple Stage - 3rd Step) Circuit  B18F7  Short in Curtain Shield Airbag (LH) Squib (Triple Stage - 3rd Step) Circuit (to Ground)  B18F8  Short in Curtain Shield Airbag (LH) Squib (Triple Stage - 3rd Step) Circuit (to +B)  


DESCRIPTION

The curtain shield squib LH circuit consists of the airbag sensor assembly and rear curtain shield airbag assembly LH (2nd step).

The circuit instructs the SRS to deploy when deployment conditions are met.

These DTCs are stored when a malfunction is detected in the curtain shield squib LH circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B18F5 Short in Curtain Shield Airbag (LH) Squib (Triple Stage - 3rd Step) Circuit One of the following conditions is met:
·

The airbag sensor assembly detects a line short circuit signal 5 times in the curtain shield squib LH circuit during the primary check.

·

A rear curtain shield airbag assembly LH (2nd step) malfunction.

·

An airbag sensor assembly malfunction.


·

Floor wire

·

Rear curtain shield airbag assembly LH (2nd step)

·

Airbag sensor assembly


Comes on Applicable
B18F6 Open in Curtain Shield Airbag (LH) Squib (Triple Stage - 3rd Step) Circuit One of the following conditions is met:
·

The airbag sensor assembly detects an open circuit signal in the curtain shield squib LH circuit for 2 seconds.

·

A rear curtain shield airbag assembly LH (2nd step) malfunction.

·

An airbag sensor assembly malfunction.


·

Floor wire

·

Rear curtain shield airbag assembly LH (2nd step)

·

Airbag sensor assembly


Comes on Applicable
B18F7 Short in Curtain Shield Airbag (LH) Squib (Triple Stage - 3rd Step) Circuit (to Ground) One of the following conditions is met:
·

The airbag sensor assembly detects a short circuit to ground signal in the curtain shield squib LH circuit for 0.5 seconds.

·

A rear curtain shield airbag assembly LH (2nd step) malfunction.

·

An airbag sensor assembly malfunction.


·

Floor wire

·

Rear curtain shield airbag assembly LH (2nd step)

·

Airbag sensor assembly


Comes on Applicable
B18F8 Short in Curtain Shield Airbag (LH) Squib (Triple Stage - 3rd Step) Circuit (to +B) One of the following conditions is met:
·

The airbag sensor assembly detects a short circuit to B+ signal in the curtain shield squib LH circuit for 0.5 seconds.

·

A rear curtain shield airbag assembly LH (2nd step) malfunction.

·

An airbag sensor assembly malfunction.


·

Floor wire

·

Rear curtain shield airbag assembly LH (2nd step)

·

Airbag sensor assembly


Comes on Applicable

WIRING DIAGRAM

C409613
0.49,1.698 0.948,1.896 0.458,0.198 10 false V23 0.49,1.865 2.167,2.396 1.677,0.531 10 false Rear Curtain Shield Airbag Assembly LH (2nd Step) 1.26,1.104 1.625,1.302 0.365,0.198 10 false ICL- 1.281,0.333 1.646,0.531 0.365,0.198 10 false ICL+ 1.698,0.313 1.844,0.49 0.146,0.177 10 false 1 1.688,1.115 1.833,1.292 0.146,0.177 10 false 2 5.323,0.344 5.573,0.594 0.25,0.25 10 false 12 5.313,1.115 5.563,1.344 0.25,0.229 10 false 11 5.594,0.448 5.958,0.646 0.365,0.198 10 false CL3+ 5.594,1.229 5.958,1.427 0.365,0.198 10 false CL3- 5.427,1.708 5.885,1.906 0.458,0.198 10 false V1 5.438,1.865 7.156,2.094 1.719,0.229 10 false Airbag Sensor Assembly

CAUTION / NOTICE / HINT

NOTICE:
·

After the engine 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

·

When disconnecting and reconnecting the battery

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>WORK PROCEDURE

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


·

After replacing the airbag sensor assembly, refer to initialization.

Click hereGeneral>SETUP>WHEN REPLACING OR REMOVING/INSTALLING PARTS>WORK PROCEDURE



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 C)>CHECK MODE PROCEDURE), 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 TROUBLESHOOTING).


PROCEDURE

1.CHECK CONNECTORS
a.
C208249C33
0.688,0.458 1,0.615 0.313,0.156 10 false *1 2.167,1.656 2.479,1.813 0.313,0.156 10 false *2 1.25,0.469 1.563,0.625 0.313,0.156 10 false *3
*1 Rear Curtain Shield Airbag Assembly LH (2nd Step)
*2 Airbag Sensor Assembly
*3 Floor Wire


Turn the engine 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 rear curtain shield airbag assembly LH (2nd step) 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.



d.

Disconnect the connectors from the rear curtain shield airbag assembly LH (2nd step) and airbag sensor assembly.


e.

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

OK:

The terminals are not deformed or damaged.



f.

Check that the floor wire connector (on the rear curtain shield airbag assembly LH (2nd step) 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.



g.

Check that the short springs of the activation prevention mechanism of the floor wire connector are not deformed or damaged.

OK:

The short springs are not deformed or damaged.



Result:
Proceed to
OK
NG



OK

2.CHECK REAR CURTAIN SHIELD AIRBAG ASSEMBLY LH (2ND STEP)

NG

REPLACE FLOOR WIRE

2.CHECK REAR CURTAIN SHIELD AIRBAG ASSEMBLY LH (2ND STEP)
a.
C416461C08
0.427,2.26 0.792,2.49 0.365,0.229 1.792,2.323 1.938,2.563 1.938,2.563 2.063,2.563 true 0.823,0.479 1.094,0.833 0.271,0.354 10 false D 1.135,0.479 1.458,0.958 0.323,0.479 10 false C 1.635,0.479 2,0.875 0.365,0.396 10 false B 1.792,0.49 2.104,0.823 0.313,0.333 10 false A 2.219,1.427 2.573,1.833 0.354,0.406 10 false *2 0.604,0.719 0.906,1.01 0.302,0.292 10 false *1 0.313,1.781 0.635,2.052 0.323,0.271 10 false *a 2.094,2.458 2.469,2.781 0.375,0.323 10 false *3 0.479,2.292 0.906,2.635 0.427,0.344 10 false V23
*1 Rear Curtain Shield Airbag Assembly LH (2nd Step)
*2 Airbag Sensor Assembly
*3 SST
*a Front view of wire harness connector
(to Rear Curtain Shield Airbag Assembly LH (2nd Step))


Connect the connector to the airbag sensor assembly.


b.

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

CAUTION:

Never connect the tester to the rear curtain shield airbag assembly LH (2nd step) 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  

c.

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


d.

Turn the engine switch on (IG), and wait for at least 60 seconds.


e.

Clear the DTCs stored in memory.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for Type C)>DTC CHECK / CLEAR

Body Electrical > SRS Airbag > Clear DTCs
50002 188

f.

Turn the engine switch off.


g.

Turn the engine switch on (IG), and wait for at least 60 seconds.


h.

Check for DTCs.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for Type C)>DTC CHECK / CLEAR

Body Electrical > SRS Airbag > Trouble Codes
50001 188
Result:
Proceed to
DTCs B18F5, B18F6, B18F7 and B18F8 are not output
DTC B18F5, B18F6, B18F7 or B18F8 is output


HINT:

Codes other than DTC B18F5, B18F6, B18F7 and B18F8 may be output at this time, but they are not related to this check.



i.

Turn the engine switch off.


j.

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


k.

Disconnect SST from connector C.



DTCs B18F5, B18F6, B18F7 and B18F8 are not output

REPLACE REAR CURTAIN SHIELD AIRBAG ASSEMBLY LH (2ND STEP)

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>CURTAIN SHIELD AIRBAG ASSEMBLY (for Rear Side)>REMOVAL


DTC B18F5, B18F6, B18F7 or B18F8 is output

3.CHECK FLOOR WIRE
3.CHECK FLOOR WIRE
a.
C416466C09
0.656,1.854 1.063,2.104 0.406,0.25 1,2.333 1.167,2.333 1.167,2.333 1.542,1.833 true 2.25,2.333 2.083,2.333 2.083,2.333 1.688,1.823 true 0.792,0.604 1.104,0.76 0.313,0.156 10 false *1 2.438,1.208 2.75,1.365 0.313,0.156 10 false *2 1.438,0.135 1.75,0.292 0.313,0.156 10 false *3 0.594,1.521 0.906,1.677 0.313,0.156 10 false *a 0.688,2.26 1.344,2.448 0.656,0.188 10 false ICL+ 2.333,2.271 2.979,2.458 0.646,0.188 10 false ICL- 0.729,1.896 1.083,2.083 0.354,0.188 10 false V23 2.052,0.354 2.365,0.51 0.313,0.156 10 false A 1.719,0.375 1.844,0.531 0.125,0.156 10 false B 1.25,0.375 1.375,0.531 0.125,0.156 10 false C 0.938,0.365 1.063,0.521 0.125,0.156 10 false D
*1 Rear Curtain Shield Airbag Assembly LH (2nd Step)
*2 Airbag Sensor Assembly
*3 Floor Wire
*a Front view of wire harness connector
(to Rear Curtain Shield Airbag Assembly LH (2nd Step))
V100135

Release the activation prevention mechanism


Disconnect the floor wire from the airbag sensor assembly.


b.

Check for a short to B+ in the circuit.

i.

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


ii.

Turn the engine switch on (IG).


iii.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
V23-1 (ICL+) - Body ground Engine switch on (IG) Below 1 V
V23-2 (ICL-) - Body ground Engine switch on (IG) Below 1 V



iv.

Turn the engine switch off.


v.

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



c.

Check for an open in the circuit.

i.

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

Standard Resistance:
Tester Connection Condition Specified Condition
V23-1 (ICL+) - V23-2 (ICL-) Always Below 1 Ω




d.

Check for a short to ground in the circuit.

i.

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

Standard Resistance:
Tester Connection Condition Specified Condition
V23-1 (ICL+) - Body ground Always 1 MΩ or higher
V23-2 (ICL-) - Body ground Always 1 MΩ or higher




e.

Check for a short in the circuit.

i.

Release the activation prevention mechanism built into connector B.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for Type C)>SYSTEM DESCRIPTION


ii.

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

Standard Resistance:
Tester Connection Condition Specified Condition
V23-1 (ICL+) - V23-2 (ICL-) Always 1 MΩ or higher



iii.

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



Result:
Proceed to
OK
NG



OK

4.CHECK DTC

NG

REPLACE FLOOR WIRE

4.CHECK DTC
a.
C374698C12
0.792,0.479 1.104,0.677 0.313,0.198 10 false *1 2.229,1.604 2.542,1.802 0.313,0.198 10 false *2
*1 Rear Curtain Shield Airbag Assembly LH (2nd Step)
*2 Airbag Sensor Assembly


Connect the connectors to the rear curtain shield airbag assembly LH (2nd step) and airbag sensor assembly.


b.

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


c.

Turn the engine switch on (IG), and wait for at least 60 seconds.


d.

Clear the DTCs stored in memory.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for Type C)>DTC CHECK / CLEAR

Body Electrical > SRS Airbag > Clear DTCs
50002 188

e.

Turn the engine switch off.


f.

Turn the engine switch on (IG), and wait for at least 60 seconds.


g.

Check for DTCs.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for Type C)>DTC CHECK / CLEAR

Body Electrical > SRS Airbag > Trouble Codes
50001 188
Result:
Proceed to
DTCs B18F5, B18F6, B18F7 and B18F8 are not output
DTC B18F5, B18F6, B18F7 or B18F8 is output


HINT:

Codes other than DTC B18F5, B18F6, B18F7 and B18F8 may be output at this time, but they are not related to this check.




DTCs B18F5, B18F6, B18F7 and B18F8 are not output

USE SIMULATION METHOD TO CHECK

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


DTC B18F5, B18F6, B18F7 or B18F8 is output

REPLACE AIRBAG SENSOR ASSEMBLY

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