RM38T0EC _58 Vehicle Interior _115188 SUPPLEMENTAL RESTRAINT SYSTEMS _0511913 AIRBAG SYSTEM C

SUPPLEMENTAL RESTRAINT SYSTEMS  AIRBAG SYSTEM  B00731A  Second Row Left Seat Belt Pretensioner Deployment Control Circuit Resistance Below Threshold  


DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B00731A Second Row Left Seat Belt Pretensioner Deployment Control Circuit Resistance Below Threshold
·

The airbag ECU assembly detects a line short in the rear pretensioner squib LH circuit for 2 seconds during the primary check.

·

Rear seat outer belt assembly LH malfunction

·

Airbag ECU assembly malfunction


·

Harness or connector

·

Rear seat outer belt assembly LH

·

Airbag ECU assembly


Comes on Applies to check mode

WIRING DIAGRAM

B585853E17
4.896,3.083 7.146,3.49 2.25,0.406 10 false Airbag ECU Assembly 4.885,2.917 6.552,3.438 1.667,0.521 10 false O1 4.781,1.333 5.583,1.979 0.802,0.646 10 false 4 4.781,1.896 5.583,2.542 0.802,0.646 10 false 3 4.958,1.333 5.76,1.979 0.802,0.646 10 false PLR+ 4.958,1.896 5.76,2.542 0.802,0.646 10 false PLR- 0.875,2.406 2.542,2.927 1.667,0.521 10 false O5 0.875,2.573 2.208,3.042 1.333,0.469 10 false Rear Seat Outer Belt Assembly LH 2.083,1.333 2.885,1.979 0.802,0.646 10 false 1 2.083,1.885 2.885,2.531 0.802,0.646 10 false 2 1.74,1.333 2.542,1.979 0.802,0.646 10 false RL+ 1.771,1.885 2.573,2.531 0.802,0.646 10 false RL-

CAUTION / NOTICE / HINT

NOTICE:
·

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

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>BEFORE DISCONNECTING BATTERY

HINT:

When disconnecting and reconnecting the auxiliary 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 ECU assembly, refer to work procedure.

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 hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM>CHECK MODE PROCEDURE

·

Perform the simulation method while checking the Data List.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM>DATA LIST / ACTIVE TEST



PROCEDURE

1.CLEAR DTC
a.

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


b.

Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs
50002 444

c.

Turn the ignition switch off.


Result:
Proceed to
NEXT



NEXT

2.CHECK DTC
2.CHECK DTC
a.

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


b.

Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes
50001 444

Result:
Result Proceed to
B00731A is output A
B00731A is not output B



A

3.CHECK CONNECTION OF CONNECTORS

B

USE SIMULATION METHOD TO CHECK

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


3.CHECK CONNECTION OF CONNECTORS
a.

Turn the ignition switch off.


b.

Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.


c.

Check that the connectors are properly connected to the rear seat outer belt assembly LH and airbag ECU assembly.

OK:

The connectors are properly connected.



Result:
Proceed to
OK
NG



OK

4.CHECK CONNECTORS

NG

CONNECT CONNECTORS PROPERLY

4.CHECK CONNECTORS
a.
C400945C09
1.323,1.281 1.323,0.844 false 0.74,1.281 0.74,0.844 false 0.667,1.292 0.979,1.448 0.313,0.156 10 false *1 2.177,1.01 2.49,1.167 0.313,0.156 10 false *2 1.26,1.292 1.573,1.448 0.313,0.156 10 false *3
*1 Rear Seat Outer Belt Assembly LH
*2 Airbag ECU Assembly
*3 Wire Harness


Disconnect the airbag ECU assembly connector.


b.

Disconnect the rear seat outer belt assembly LH connector.


c.

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

OK:

The terminals are not deformed or damaged.



d.

Check that the connectors are not loose, deformed or damaged.

OK:

The connector locking button is not disengaged, and the claw of the lock is not deformed or damaged.



e.

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

OK:

The short springs are not deformed or damaged.



Result:
Proceed to
OK
NG



OK

5.CLEAR DTC

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.CLEAR DTC
a.
C465714C02
0.417,2.125 0.792,2.385 0.375,0.26 1.969,2.646 1.76,2.292 true 0.646,0.979 0.646,0.667 false 1.458,0.99 1.458,0.677 false 0.583,0.99 0.896,1.188 0.313,0.198 10 false *1 2.302,0.875 2.615,1.073 0.313,0.198 10 false *2 1.406,1.01 1.719,1.208 0.313,0.198 10 false *3 1.802,0.521 2.115,0.719 0.313,0.198 10 false A 1.646,0.521 1.958,0.719 0.313,0.198 10 false B 1.146,0.521 1.458,0.719 0.313,0.198 10 false C 0.781,0.521 1.094,0.719 0.313,0.198 10 false D 0.521,2.167 0.833,2.365 0.313,0.198 10 false O5 1.906,2.688 2.219,2.885 0.313,0.198 10 false SST 0.313,1.667 0.625,1.865 0.313,0.198 10 false *a
*1 Rear Seat Outer Belt Assembly LH
*2 Airbag ECU Assembly
*3 Wire Harness
*a Front view of wire harness connector
(to Rear Seat Outer Belt Assembly LH)


Connect the airbag ECU assembly connector.


b.

Connect 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 pretensioner 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 (-) auxiliary 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.

Body Electrical > SRS Airbag > Clear DTCs
50002 444

f.

Turn the ignition switch off.


Result:
Proceed to
NEXT



NEXT

6.CHECK REAR SEAT OUTER BELT ASSEMBLY LH
6.CHECK REAR SEAT OUTER BELT ASSEMBLY LH
a.

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


b.

Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes
50001 444
Result:
Result Proceed to
B00731A is not output A
B00731A is output B


HINT:

Codes other than DTC B00731A may be output at this time, but they are not related to this check.



c.

Turn the ignition switch off.


d.

Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.


e.

Disconnect SST from connector C.



A

REPLACE REAR SEAT OUTER BELT ASSEMBLY LH

Click hereVehicle Interior>SEAT BELT>REAR SEAT OUTER BELT ASSEMBLY>REMOVAL


B

7.CHECK HARNESS AND CONNECTOR
7.CHECK HARNESS AND CONNECTOR
a.
B585767C05
0.542,1.906 0.927,2.146 0.385,0.24 0.781,2.417 1.031,2.417 1.031,2.417 1.281,1.958 true 1.938,2.406 1.688,2.406 1.688,2.406 1.448,1.958 true 1.813,0.344 1.969,0.542 0.156,0.198 10 false A 1.51,0.344 1.667,0.542 0.156,0.198 10 false B 0.667,0.344 0.823,0.542 0.156,0.198 10 false D 1,0.344 1.156,0.542 0.156,0.198 10 false C 0.531,0.583 0.844,0.781 0.313,0.198 10 false *1 1.229,0.531 1.542,0.729 0.313,0.198 10 false *3 2.51,1.292 2.823,1.49 0.313,0.198 10 false *2 0.344,1.49 0.656,1.688 0.313,0.198 10 false *a 0.583,1.938 0.896,2.135 0.313,0.198 10 false O5 0.5,2.333 0.813,2.531 0.313,0.198 10 false RL+ 1.99,2.323 2.302,2.521 0.313,0.198 10 false RL-
*1 Rear Seat Outer Belt Assembly LH
*2 Airbag ECU Assembly
*3 Wire Harness
*a Front view of wire harness connector
(to Rear Seat Outer Belt Assembly LH)
V100135

Release the activation prevention mechanism


Disconnect the airbag ECU assembly connector.


b.

Release the activation prevention mechanism built into connector B.

HINT:

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM>SYSTEM DESCRIPTION



c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
O5-1 (RL+) - O5-2 (RL-) Always 1 MΩ or higher


Result:
Proceed to
OK
NG



d.

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



OK

8.CLEAR DTC

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.CLEAR DTC
a.
C400948C12
0.833,1.229 0.833,0.865 false 0.771,1.271 1.083,1.427 0.313,0.156 10 false *1 2.135,1.042 2.448,1.198 0.313,0.156 10 false *2 1.729,0.698 2.042,0.854 0.313,0.156 10 false A 1.573,0.698 1.885,0.854 0.313,0.156 10 false B 1.115,0.708 1.427,0.865 0.313,0.156 10 false C 0.958,0.708 1.271,0.865 0.313,0.156 10 false D
*1 Rear Seat Outer Belt Assembly LH
*2 Airbag ECU Assembly


Connect the airbag ECU assembly connector.


b.

Connect the rear seat outer belt assembly LH connector.


c.

Connect the cable to the negative (-) auxiliary 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.

Body Electrical > SRS Airbag > Clear DTCs
50002 444

f.

Turn the ignition switch off.


Result:
Proceed to
NEXT



NEXT

9.CHECK DTC
9.CHECK DTC
a.

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


b.

Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes
50001 444

Result:
Result Proceed to
B00731A is not output A
B00731A is output B


HINT:

Codes other than DTC B00731A may be output at this time, but they are not related to this check.



A

USE SIMULATION METHOD TO CHECK

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


B

REPLACE AIRBAG ECU ASSEMBLY

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