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

SUPPLEMENTAL RESTRAINT SYSTEMS  AIRBAG SYSTEM  B00721A  Passenger Seat Belt Pretensioner "A" Deployment Control Circuit Resistance Below Threshold  


DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B00721A Passenger Seat Belt Pretensioner "A" Deployment Control Circuit Resistance Below Threshold One of the following conditions is met:
·

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

·

Front passenger side pretensioner squib (front seat outer belt assembly RH) malfunction

·

Airbag ECU assembly malfunction


·

Harness or connector

·

Front passenger side pretensioner squib (Front seat outer belt assembly RH)

·

Airbag ECU assembly


Comes on Applies to check mode

DTC Detection Conditions:
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3
Diagnosis Condition During the primary check ○ ○ ○
Malfunction Status The airbag ECU assembly detects a line short in the front passenger side pretensioner squib circuit ○ - -
Front passenger side pretensioner squib (front seat outer belt assembly RH) malfunction - ○ -
Airbag ECU assembly malfunction - - ○
Detection Time 2 seconds 2 seconds 2 seconds
Number of Trips 1 trip 1 trip 1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.


WIRING DIAGRAM

C442199E30
4.906,3.083 7.104,3.542 2.198,0.458 10 false Airbag ECU Assembly 4.885,2.917 6.125,3.104 1.24,0.188 10 false O17 4.781,1.333 5.583,1.979 0.802,0.646 10 false 4 4.771,1.896 5.573,2.542 0.802,0.646 10 false 3 4.958,1.333 5.76,1.979 0.802,0.646 10 false PR+ 4.958,1.896 5.76,2.542 0.802,0.646 10 false PR- 0.875,2.406 1.76,2.583 0.885,0.177 10 false O2 0.875,2.573 3.448,3.417 2.573,0.844 10 false Front Passenger Side Pretensioner Squib (Front Seat Outer Belt Assembly RH) 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 1.802,1.333 2.604,1.979 0.802,0.646 10 false R+ 1.833,1.885 2.635,2.531 0.802,0.646 10 false R-

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




HINT:
·

To perform the simulation method, select Check Mode 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.CHECK CURRENT 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
Current B00721A is output A
Current B00721A is not output B



A

2.CHECK CONNECTION OF CONNECTORS

B

USE SIMULATION METHOD TO CHECK

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

HINT:
·

Perform the simulation method by selecting Check Mode using 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




2.CHECK CONNECTION OF CONNECTORS
a.

Turn the ignition switch off.


b.

Disconnect the cable from the negative (-) auxiliary battery terminal.

CAUTION:

Wait at least 60 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.



c.

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

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 front seat outer belt assembly RH and airbag ECU assembly.


b.
C280784C06
1.5,0.792 1.333,0.792 1.333,0.792 1.333,1.292 false 0.698,0.792 0.531,0.792 0.531,0.792 0.531,1.292 false 2.417,0.969 2.75,1.219 0.333,0.25 10 false *2 0.74,0.688 1.156,0.917 0.417,0.229 10 false *1 1.531,0.688 1.833,0.875 0.302,0.188 10 false *3
*1 Front Seat Outer Belt Assembly RH
*2 Airbag ECU Assembly
*3 Wire Harness


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

OK:

The terminals of the connectors are not deformed or damaged.



c.

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.



d.

Check that the wire harness connector (on the front seat outer belt assembly RH side) is not loose, deformed or damaged.

OK:

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



Result:
Proceed to
OK
NG



OK

4.CLEAR DTC

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CLEAR DTC
a.
B566955C05
0.427,2.25 0.802,2.5 0.375,0.25 1.792,2.344 1.969,2.344 false 0.708,0.958 0.708,0.51 0.708,0.51 0.552,0.51 false 1.458,0.958 1.458,0.51 1.458,0.51 1.302,0.51 false 0.385,0.438 0.875,0.844 0.49,0.406 10 false *1 2.281,0.656 2.76,1.073 0.479,0.417 10 false *2 1.823,0.938 2.208,1.458 0.385,0.521 10 false A 1.677,0.938 2.167,1.417 0.49,0.479 10 false B 1.167,0.948 1.917,1.448 0.75,0.5 10 false C 0.823,0.948 1.604,1.344 0.781,0.396 10 false D 2.01,2.26 2.448,2.594 0.438,0.333 10 false SST 0.302,1.896 0.698,2.26 0.396,0.365 10 false *a 0.51,2.292 0.802,2.521 0.292,0.229 10 false O2 1.115,0.438 1.604,0.844 0.49,0.406 10 false *3
*1 Front Seat Outer Belt Assembly RH
*2 Airbag ECU Assembly
*3 Wire Harness
*a Front view of wire harness connector
(to Front Seat Outer Belt Assembly RH)


Connect the connector to the airbag ECU assembly.


b.

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

CAUTION:

Never connect a tester to the front seat outer belt assembly RH 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 it.

·

Insert SST straight into the terminals of the connector.




SST
09843-18061  

c.

Connect the cable to the negative (-) auxiliary 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 444

f.

Turn the ignition switch off.


Result:
Proceed to
NEXT



NEXT

5.CHECK FRONT SEAT OUTER BELT ASSEMBLY RH
5.CHECK FRONT SEAT OUTER BELT ASSEMBLY RH
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
B00721A is not output A
B00721A is output B


HINT:

Codes other than DTC B00721A 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.

CAUTION:

Wait at least 60 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.



e.

Disconnect SST from connector C.



A

REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH

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


B

6.CHECK HARNESS AND CONNECTOR
6.CHECK HARNESS AND CONNECTOR
a.

Disconnect the connector from the airbag ECU assembly.


b.
B566956C05
0.521,2.417 0.917,2.688 0.396,0.271 1.604,2.26 1.885,2.073 true 1.135,2.073 1.417,2.26 true 0.698,1.052 0.698,0.635 0.698,0.635 0.542,0.635 false 1.396,1.052 1.396,0.635 1.396,0.635 1.24,0.635 false 0.375,0.552 0.844,0.948 0.469,0.396 10 false *1 2.271,0.76 2.604,1.135 0.333,0.375 10 false *2 1.885,1.042 2.313,1.5 0.427,0.458 10 false A 1.583,1.042 1.99,1.635 0.406,0.594 10 false B 1.125,1.042 1.542,1.552 0.417,0.51 10 false C 0.823,1.042 1.24,1.427 0.417,0.385 10 false D 1.927,1.979 2.271,2.323 0.344,0.344 10 false R- 0.917,1.948 1.406,2.292 0.49,0.344 10 false R+ 0.26,1.813 0.563,2.188 0.302,0.375 10 false *a 1.073,0.563 1.667,1.063 0.594,0.5 10 false *3 0.594,2.469 0.99,2.802 0.396,0.333 10 false O2
*1 Front Seat Outer Belt Assembly RH
*2 Airbag ECU Assembly
*3 Wire Harness
*a Front view of wire harness connector
(to Front Seat Outer Belt Assembly RH)


Check for a short in the circuit.

i.

Release the activation prevention mechanism built into connector B.

HINT:

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



ii.

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

Standard Resistance:
Tester Connection Condition Specified Condition
O2-1 (R+) - O2-2 (R-) Always 1 MΩ or higher


Result:
Proceed to
OK
NG



iii.

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




OK

7.CLEAR DTC

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.CLEAR DTC
a.
C238241C01
0.844,1.292 0.844,0.844 0.844,0.844 0.552,0.844 false 0.396,0.781 0.729,1.083 0.333,0.302 10 false *1 0.979,1.302 1.156,1.531 0.177,0.229 10 false D 1.135,1.302 1.344,1.5 0.208,0.198 10 false C 1.583,1.302 1.781,1.5 0.198,0.198 10 false B 1.74,1.302 1.938,1.542 0.198,0.24 10 false A 2.146,1.021 2.438,1.26 0.292,0.24 10 false *2
*1 Front Seat Outer Belt Assembly RH
*2 Airbag ECU Assembly


Connect the connectors to the front seat outer belt assembly RH and airbag ECU assembly.


b.

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


c.

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


d.

Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs
50002 444

e.

Turn the ignition switch off.


Result:
Proceed to
NEXT



NEXT

8.CHECK DTC
8.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
B00721A is not output A
B00721A is output B


HINT:

Codes other than DTC B00721A 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

HINT:
·

Perform the simulation method by selecting Check Mode using 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




B

REPLACE AIRBAG ECU ASSEMBLY

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