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

SUPPLEMENTAL RESTRAINT SYSTEMS  AIRBAG SYSTEM(for Type B)  B1925  Short in Rear P/T Squib (LH) Circuit  B1926  Open in Rear P/T Squib (LH) Circuit  B1927  Short in Rear P/T Squib (LH) Circuit (to Ground)  B1928  Short in Rear P/T Squib (LH) Circuit (to +B)  


DESCRIPTION

The rear seat belt pretensioner LH circuit consists of the airbag sensor assembly and rear seat outer belt assembly LH.

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

These DTCs are stored when a malfunction is detected in the rear seat belt pretensioner LH circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B1925 Short in Rear P/T Squib (LH) Circuit One of the following conditions is met:
·

The airbag sensor assembly detects a line short circuit signal 5 times in the rear seat belt pretensioner LH circuit during the primary check.

·

A rear seat outer belt assembly LH malfunction.

·

An airbag sensor assembly malfunction.


·

Floor wire

·

Rear seat outer belt assembly LH

·

Airbag sensor assembly


Comes on Applicable
B1926 Open in Rear P/T Squib (LH) Circuit One of the following conditions is met:
·

The airbag sensor assembly detects an open circuit signal in the rear seat belt pretensioner LH circuit for 2 seconds.

·

A rear seat outer belt assembly LH malfunction.

·

An airbag sensor assembly malfunction.


·

Floor wire

·

Rear seat outer belt assembly LH

·

Airbag sensor assembly


Comes on Applicable
B1927 Short in Rear P/T Squib (LH) Circuit (to Ground) One of the following conditions is met:
·

The airbag sensor assembly detects a short circuit to ground signal in the rear seat belt pretensioner LH circuit for 0.5 seconds.

·

A rear seat outer belt assembly LH malfunction.

·

An airbag sensor assembly malfunction.


·

Floor wire

·

Rear seat outer belt assembly LH

·

Airbag sensor assembly


Comes on Applicable
B1928 Short in Rear P/T Squib (LH) Circuit (to +B) One of the following conditions is met:
·

The airbag sensor assembly detects a short circuit to B+ signal in the rear seat belt pretensioner LH circuit for 0.5 seconds.

·

A rear seat outer belt assembly LH malfunction.

·

An airbag sensor assembly malfunction.


·

Floor wire

·

Rear seat outer belt assembly LH

·

Airbag sensor assembly


Comes on Applicable

WIRING DIAGRAM

C409207
0.49,1.698 0.948,1.896 0.458,0.198 10 false V12 0.49,1.865 2.104,2.208 1.615,0.344 10 false Rear Seat Outer Belt Assembly LH 1.313,1.135 1.604,1.302 0.292,0.167 10 false RL- 1.323,0.354 1.615,0.521 0.292,0.167 10 false RL+ 1.698,0.323 1.844,0.5 0.146,0.177 10 false 1 1.698,1.125 1.844,1.302 0.146,0.177 10 false 2 5.365,0.365 5.51,0.531 0.146,0.167 10 false 4 5.344,1.135 5.49,1.313 0.146,0.177 10 false 3 5.583,0.438 6.01,0.625 0.427,0.188 10 false PLR+ 5.594,1.229 6.01,1.396 0.417,0.167 10 false PLR- 5.427,1.688 5.885,1.885 0.458,0.198 10 false V1 5.417,1.854 7.052,2.083 1.635,0.229 10 false Airbag Sensor Assembly

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

·

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 B)>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.
C208249C34
0.646,0.458 0.958,0.615 0.313,0.156 10 false *1 2.188,1.656 2.5,1.813 0.313,0.156 10 false *2 1.26,0.448 1.573,0.604 0.313,0.156 10 false *3
*1 Rear Seat Outer Belt Assembly LH
*2 Airbag Sensor Assembly
*3 Floor Wire


Turn the ignition 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 seat outer belt assembly LH 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 seat outer belt assembly LH 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 seat outer belt assembly LH 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 SEAT OUTER BELT ASSEMBLY LH

NG

REPLACE FLOOR WIRE

2.CHECK REAR SEAT OUTER BELT ASSEMBLY LH
a.
C238359C68
0.396,2.25 0.74,2.5 0.344,0.25 1.781,2.302 1.927,2.385 1.927,2.385 2.073,2.385 true 0.573,0.729 0.969,1.073 0.396,0.344 10 false *1 2.24,1.448 2.552,1.781 0.313,0.333 10 false *2 1.813,0.521 2.146,0.979 0.333,0.458 10 false A 1.656,0.521 2.24,0.958 0.583,0.438 10 false B 1.156,0.521 1.708,0.99 0.552,0.469 10 false C 0.781,0.521 1.365,1.063 0.583,0.542 10 false D 0.448,2.281 0.979,2.656 0.531,0.375 10 false V12 2.135,2.302 2.573,2.646 0.438,0.344 10 false *3 0.344,1.719 0.646,2 0.302,0.281 10 false *a
*1 Rear Seat Outer Belt Assembly LH
*2 Airbag Sensor Assembly
*3 SST
*a Front view of wire harness connector
(to Rear Seat Outer Belt Assembly LH)


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 seat outer belt assembly LH 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 ignition switch to ON, and wait for at least 60 seconds.


e.

Clear the DTCs stored in memory.

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

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.

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

Body Electrical > SRS Airbag > Trouble Codes
50001 188
Result:
Proceed to
DTCs B1925, B1926, B1927 and B1928 are not output
DTC B1925, B1926, B1927 or B1928 is output


HINT:

Codes other than DTC B1925, B1926, B1927 and B1928 may be output at this time, but they are not related to this check.



i.

Turn the ignition 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 B1925, B1926, B1927 and B1928 are not output

REPLACE REAR SEAT OUTER BELT ASSEMBLY LH

Click hereVehicle Interior>SEAT BELT>REAR SEAT OUTER BELT ASSEMBLY (for Van)>REMOVAL


DTC B1925, B1926, B1927 or B1928 is output

3.CHECK FLOOR WIRE
3.CHECK FLOOR WIRE
a.
C411576C04
0.438,2.104 0.813,2.333 0.375,0.229 0.833,2.625 0.969,2.625 0.969,2.625 1.208,2.25 true 1.771,2.625 1.656,2.625 1.656,2.625 1.344,2.25 true 0.76,0.167 1.073,0.323 0.313,0.156 10 false *1 2.208,1.271 2.521,1.427 0.313,0.156 10 false *2 1.323,0.156 1.635,0.313 0.313,0.156 10 false *3 0.385,1.688 0.698,1.844 0.313,0.156 10 false *a 0.885,0.385 1.021,0.552 0.135,0.167 10 false D 1.115,0.396 1.25,0.563 0.135,0.167 10 false C 1.552,0.385 1.688,0.552 0.135,0.167 10 false B 1.813,0.365 1.948,0.531 0.135,0.167 10 false A 0.531,2.552 1.094,2.74 0.563,0.188 10 false RL+ 1.844,2.552 2.406,2.75 0.563,0.198 10 false RL- 0.51,2.135 0.823,2.292 0.313,0.156 10 false V12
*1 Rear Seat Outer Belt Assembly LH
*2 Airbag Sensor Assembly
*3 Floor Wire
*a Front view of wire harness connector
(to Rear Seat Outer Belt Assembly LH)
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.


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
V12-1 (RL+) - Body ground Ignition switch ON Below 1 V
V12-2 (RL-) - Body ground Ignition switch ON Below 1 V



iv.

Turn the ignition 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
V12-1 (RL+) - V12-2 (RL-) 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
V12-1 (RL+) - Body ground Always 1 MΩ or higher
V12-2 (RL-) - 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 B)>SYSTEM DESCRIPTION


ii.

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

Standard Resistance:
Tester Connection Condition Specified Condition
V12-1 (RL+) - V12-2 (RL-) 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.
C374698C13
0.823,1 1.135,1.198 0.313,0.198 10 false *1 2.229,1.615 2.542,1.813 0.313,0.198 10 false *2
*1 Rear Seat Outer Belt Assembly LH
*2 Airbag Sensor Assembly


Connect the connectors to the rear seat outer belt assembly LH and airbag sensor assembly.


b.

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


c.

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


d.

Clear the DTCs stored in memory.

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

Body Electrical > SRS Airbag > Clear DTCs
50002 188

e.

Turn the ignition switch off.


f.

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


g.

Check for DTCs.

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

Body Electrical > SRS Airbag > Trouble Codes
50001 188
Result:
Proceed to
DTCs B1925, B1926, B1927 and B1928 are not output
DTC B1925, B1926, B1927 or B1928 is output


HINT:

Codes other than DTC B1925, B1926, B1927 and B1928 may be output at this time, but they are not related to this check.




DTCs B1925, B1926, B1927 and B1928 are not output

USE SIMULATION METHOD TO CHECK

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


DTC B1925, B1926, B1927 or B1928 is output

REPLACE AIRBAG SENSOR ASSEMBLY

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